US3059144A - Information display device - Google Patents

Information display device Download PDF

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US3059144A
US3059144A US835330A US83533059A US3059144A US 3059144 A US3059144 A US 3059144A US 835330 A US835330 A US 835330A US 83533059 A US83533059 A US 83533059A US 3059144 A US3059144 A US 3059144A
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electroluminescent
cell
cells
photoconductor
switches
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US835330A
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Jr Edwin R Bowerman
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GTE Sylvania Inc
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Sylvania Electric Products Inc
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/088—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements using a non-linear two-terminal element
    • G09G2300/0885—Pixel comprising a non-linear two-terminal element alone in series with each display pixel element
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
    • G09G2360/145—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen
    • G09G2360/147—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen the originated light output being determined for each pixel
    • G09G2360/148—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen the originated light output being determined for each pixel the light being detected by light detection means within each pixel

Definitions

  • I have invented a new type of information display device wherein information bearing electrical signals are simultaneously supplied to a plurality of separate groups of display elements. These groups are electrically controlled in such manner that each group can be successively and individual actuated in a predetermined sequence, each group displaying the information carried by the supplied signals in the form of an illuminated pattern against a dark background.
  • I provide (x) (y) different electroluminescent photoconductor cells, each cell consisting of separate electroluminescent and photoconductive sections, one section being applied over the other, the sections being electrically connected in series. These cells are arranged into (x) differnet groups, each group containing (y) diierent cells. Corresponding cells in each group are electrically connected in parallel, thus providing (y) different cell arrays, each array containing (x) ditierent paralleled cells.
  • I further provide (x) different electroluminescent light sources. Each source is associated with a corresponding group of cells. Each source is optically coupled to the photoconductor sections of all cells in the corresponding group.
  • (x-l-y) diierent two position sector switches are employed. These switches are divided into two separate sets. One set, designated as selector switches, contains (x) switches; the other set, designated as data readin switches, contains (y) switches.
  • Each data read-in switch is connected in series with a corresponding cell array across a power supply and, when closed, completes a circuit therebetween.
  • each selector switch is connected in series with a corresponding light source across the power supply; and, when closed, completes a circuit therebetween.
  • the corresponding electroluminescent source When any selector switch is closed, the corresponding electroluminescent source will emit light and illuminate the photoconductive sections of all cells in the corresponding group.
  • the sources connected to selector switches which are open are deenergized and emit no light.
  • the photoconductive sections of all cells in the groups corresponding to the open selector switches l will be in the dark.
  • any data read-in switch When any data read-in switch is closed, voltage will be app'lied across all of the cells in the corresponding array. If the photoconductive section of any of these energized cells is illuminated, the photoconductive impedance will be relatively low, and the corresponding electroluminescent section will be energized and emit light. On the other hand, if the photoconductive section is in the dark, the photoconductive impedance will be relatively high, and the portion of the applied voltage appearing across the corresponding electroluminescent section will be insuicient to produce light.
  • FIG. 1 shows an information display device illustrating the principles of my invention
  • FIG. 2 shows a plurality of electrically interconnected devices of the type shown in FIG. l;
  • FIG. 3 shows a modification of the device shown in FIG. l.
  • FIG. 4 shows another modification of the device shown in FIG. 1.
  • an electroluminescent-photoconductive cell which, in this example, is constituted by a sandwich-like structure containing a transparent electrode 18, a photoconductive layer 16 applied over electrode 1S, an electroluminescent layer 14 applied over the photoconductive layer 16, and a transparent electrode 12 applied over electroluminescent layer 14.
  • a transparent electrode can be inserted between the electroluminescent layer 14 and the photoconductive layer 16.
  • two transparent electrodes, separated by a transparent insulating region can be interposed between these layers, these two electrodes being electrically interconnected externally.
  • an electroluminescent light source which, in this example, is constituted by an electroluminescent layer 24, opposite surfaces of which are coated with electrodes 22 and 26.
  • Electrode 22 is transparent; electrode 26 can but need not be transparent.
  • Electrode 18 of the photoconductive-electroluminescent cell is connected through a two position data read-in switch 20 to ground. Electrode 12 of this cell is connected to terminal l1.
  • Electrode 22 of the electroluminescent source is grounded.
  • 4Electrode 26 of this source is connected through a two position selector switch 28 to terminal 11.
  • An excitation voltage for example of volts at 60 cycles per second, is supplied from a suitable power supply (not shown) and appears across terminals 10 and li. (Terminal 10 is grounded.)
  • electroluminescent layer 24 When selector switch 28 is closed, electroluminescent layer 24 is energized and emits light, the emitted light illuminating the photoconductor layer 16. If now the data switch 20 is closed, the photoconductive layer 16 being in its low impedance state, the electroluminescent layer 14 will be energized and will emit light. If either of switches 20 ⁇ or 28 is open, electroluminescent layer 14 will emit no light.
  • the plurality of the devices of FIG. 1 can be interconnected as shown in FIG. 2.
  • FIG. 2 there is provided three separate electroluminescent sources, each source being associated with two electroluminescent-photoconductive cells to form a corresponding group. Each source is optically coupled with the photoconductive layers of both associated cells. Each one of the three sources is controlled by a corresponding selector switch 200, 202 or 204.
  • the iirst cells in all groups are controlled in parallel from a tirst data read-in switch 206.
  • the second cells in all groups are controlled in parallel from a second data read-in switch 208.
  • switch 206 When switch 206 is closed and switch 208 is open, closing one of selector switches 200, 202 or 204 will cause the first cell in the group corresponding to the closed selector switch to emit light, while all other cells in all groups will be dark. Similarly, if switch 2.06 is open and switch 20S is closed, the second cell in the group corresponding to the closed selector switch will emit light, while all other cells will remain dark. Finally, if switches 206 and 208 are open, all cells in all groups will be dark regardless of the position of the selector switches.
  • each group of FIG. 2 can have more than two cells and the number of data read-in i? switches can be increased accordingly.
  • each electroluminescent source can be replaced by a plurality of paralleled electroluminescent sources, each being optically coupled to a single photoconductor-electroluminescent cell.
  • the energized electroluminescent-photoconductive cells in any group can be de'energized by opening either the appropriate selector switch or the appropriate data switch. It is sometimes necessary to store the illuminated pattern displayed by a group; i.e. maintain the illuminated pattern after either or both types of switches are opened.
  • FIG. 3 This type of storage can be carried out in the manner shown in FIG. 3.
  • the device of FIG. 3 employs the same photoconductive-electroluminescent cell and electroluminescent source as shown in FIG. 2. However, in FIG. 3, an electrode 102 is interposed between the electroluminescent and photoconductive layers 14 and 18.
  • a portion of the electroluminescent layer' 14 is optically coupled to a photoconductor cell including light transparent electrode 106 and electrode 108 with a photoconductive layer 104 interposed between these electrodes.
  • a light mask 100 optically isolates the portion of electroluminescent layer 14 optically coupled to the photoconductive cell from the remaining portion of the electroluminescent layer 14.
  • the photoconductive cell is connected between electrode 102 ⁇ and ground.
  • IFIG. 4 shows a modication of FIG. 3 wherein the portions of the electroluminescent layer optically masked from or optically coupled to the separate photoconductive cell take the form of two separate electroluminescent layers 1.4 and 110 electrically connected in parallel.
  • the device of FIG. 4 operates in the same manner as that of FIG. 3. In FIG. 4, however, the electroluminescent layer ⁇ 1310 and the separate photoconductor cell can be positioned remote from the electroluminescent-photoconductor display cell, a circuit arrangement sometimes preferable to that of FIG. 3.
  • switches such as automatic electronic or magnetic switches
  • any -two terminal network which yields a pulse train or a pulsating voltage can be substituted for any of the switches shown in the drawings.
  • the term switch as used herein applies to any of the above.
  • the electroluminescent sources shown in the figures can be operated from a first power supply, while the electroluminescent-photoconductive cells and associated elements can be operated from an additional power supply electrically independent from the rst supply.
  • a device comprising a pair of terminals adapted for connection to a power supply; an electroluminescentphotoconductor cel-l; a data read-in switch connected in series with said electroluminescent-photoconductor cell between said terminals; an electroluminescent light source optically coupled to the photoconductor element of said electroluminescent-photoconductor cell; a selector switch connected in series with said source between said terminals; and a photoconductor component optically coupled to the electroluminescent element of said cell and electrically connected between the junction of the electroluminescent and photoconductor elements of said cell and the one of said terminals to which said data read-in switch is directly connected.
  • a device comprising a pair of terminals adapted for connection to a power supply; an electroluminescentphotoconductor cell; a data read-in switch connected in series wi-th said electroluminescent-photoconductor cell between said terminals; an electroluminescent light source optically coupled to the photoconductor element of said electroluminescent-photoconductor cell; a selector switch connected in series with said source between said terminals; and a photoconductor component optically coupled to the electroluminescent element of said cell and electrically connected in circuit with said electroluminescent element and said terminals; said component, when illuminated, establishing a direct connection between said electroluminescent element and said terminals.
  • a device comprising a pair of terminals adapted for connection to a power supply; (x) (y) different electroluminescent-photoconductor cells arranged into (x) different cell groups; each group containing (y) dilerent cells; corresponding cells in each group being connected in parallel thereby forming (y) diferent arays of paralleled cells (ly) diierent data read-in switches, each data switch being connected in series with the corresponding array between said terminals; (x) different electroluminescent light sources, each source being optically coupled to the photoconductor elements of all cells in the corresponding group; (x) different selector switches, each selector switch being connected in series with the corresponding source between said terminals; and (x) (y) dilerent photoconductor components, eac-h component being optically coupled to the electroluminescent element of the corresponding cell and being electrically connected in circuit with the corresponding electroluminescent element and said terminal, each component, when illuminated, establishing a direct connection between said electroluminescent element
  • a device comprising a pair of terminals adapted for connection to a power supply; an electroluminescent-photoconductor cell; a data read-in switch connected in series with said electroluminescent-photoconductor cell between said terminals; an electroluminescent light source optically coupled to the photoconductor element of said electroluminescent-photoconductor cell; a selector switch connected in series with said source between said terminals; an electroluminescent component electrically connected in parallel with the electroluminescent element of said cell; and a photoconductor component optically coupled to said electroluminescent component, said photoconductor component being connected in circuit with said elec.- troluminescent component and said terminals, said photoconductor component, when illuminated, establishing a direct connection between said electroluminescent element yand said terminals.
  • a device comprising a pair of terminals adapted for connection to a power supply; (y)(x) different electroluminescent-photoconductor cel-ls arranged into (x) different cell groups, each group containing (y) different cells; corresponding cells in each group being connected in parallel thereby forming (y) different arrays of paralleled cells, (y) different data read-in switches, each data switch being ⁇ connected in series with the corresponding array between said terminals; (x) different electroluminescent light sources, each source being optically coupled to lthe photoconductor elements of all cells in the corresponding group; (x) different selector switches, each selector switch being connected in series with the corresponding source between said terminals; (y) (x) different .electroluminescent components, each electroluminescent component being electrically connected in parallel with the electroluminescent element of the corresponding cell; and (x) (y) different photoconductor components, each photoconductor component being optically coupled to the corresponding electroluminescent component and being electrical

Description

Oct. 16?v 1962 E. R. BOWERMAN, JR
INFORMATION DISPLAY DEVICE Filed Aug. 2l. 1959 EL AVH? l/0 L/ ELECTRODE //2 'F20 lNvEN-roR EDWIN R. BOWERMA/V JK i BY A'I'I'ORNEY 3,059,144 INFORMATIN DISPLAY DEVICE Edwin R. Bowerrnan, ir., Whitestone, NY., assigner to Sylvania Electric Products inc., a corporation ot Dela- Ware Filed Aug. 21, 1959, Ser. No. 835,330 Claims. (Cl. 315-15@ My invention relates to information display devices.
I have invented a new type of information display device wherein information bearing electrical signals are simultaneously supplied to a plurality of separate groups of display elements. These groups are electrically controlled in such manner that each group can be successively and individual actuated in a predetermined sequence, each group displaying the information carried by the supplied signals in the form of an illuminated pattern against a dark background.
In accordance with the principles of my invention, I provide (x) (y) different electroluminescent photoconductor cells, each cell consisting of separate electroluminescent and photoconductive sections, one section being applied over the other, the sections being electrically connected in series. These cells are arranged into (x) differnet groups, each group containing (y) diierent cells. Corresponding cells in each group are electrically connected in parallel, thus providing (y) different cell arrays, each array containing (x) ditierent paralleled cells. I further provide (x) different electroluminescent light sources. Each source is associated with a corresponding group of cells. Each source is optically coupled to the photoconductor sections of all cells in the corresponding group.
Further (x-l-y) diierent two position sector switches are employed. These switches are divided into two separate sets. One set, designated as selector switches, contains (x) switches; the other set, designated as data readin switches, contains (y) switches.
Each data read-in switch is connected in series with a corresponding cell array across a power supply and, when closed, completes a circuit therebetween. In addition, each selector switch is connected in series with a corresponding light source across the power supply; and, when closed, completes a circuit therebetween.
When any selector switch is closed, the corresponding electroluminescent source will emit light and illuminate the photoconductive sections of all cells in the corresponding group. The sources connected to selector switches which are open are deenergized and emit no light. Thus, the photoconductive sections of all cells in the groups corresponding to the open selector switches lwill be in the dark.
When any data read-in switch is closed, voltage will be app'lied across all of the cells in the corresponding array. If the photoconductive section of any of these energized cells is illuminated, the photoconductive impedance will be relatively low, and the corresponding electroluminescent section will be energized and emit light. On the other hand, if the photoconductive section is in the dark, the photoconductive impedance will be relatively high, and the portion of the applied voltage appearing across the corresponding electroluminescent section will be insuicient to produce light.
Thus, when any selector switch is closed, the cell or cells in the corresponding group which are connected to closed data switches will be illuminated, while the cell or cells in this group which are connected to open data switches will be dark. As a consequence, at any time the information represented by the arrangement of closed and open data switches will be visually displayed only by the group connected to a closed selector switch.
3,059,144 Patented Oct. 16, 1962 Illustrative embodiments of my invention will now be described with reference to the accompanying drawings wherein:
lFIG. 1 shows an information display device illustrating the principles of my invention;
FIG. 2 shows a plurality of electrically interconnected devices of the type shown in FIG. l;
FIG. 3 shows a modification of the device shown in FIG. l; and
FIG. 4 shows another modification of the device shown in FIG. 1.
Referring now to FIG. l, there is shown an electroluminescent-photoconductive cell which, in this example, is constituted by a sandwich-like structure containing a transparent electrode 18, a photoconductive layer 16 applied over electrode 1S, an electroluminescent layer 14 applied over the photoconductive layer 16, and a transparent electrode 12 applied over electroluminescent layer 14. (Alternatively, if desired, a transparent electrode can be inserted between the electroluminescent layer 14 and the photoconductive layer 16. Further, two transparent electrodes, separated by a transparent insulating region can be interposed between these layers, these two electrodes being electrically interconnected externally.)
Further, there is shown an electroluminescent light source which, in this example, is constituted by an electroluminescent layer 24, opposite surfaces of which are coated with electrodes 22 and 26. Electrode 22 is transparent; electrode 26 can but need not be transparent.
Electrode 18 of the photoconductive-electroluminescent cell is connected through a two position data read-in switch 20 to ground. Electrode 12 of this cell is connected to terminal l1.
Electrode 22 of the electroluminescent source is grounded. 4Electrode 26 of this source is connected through a two position selector switch 28 to terminal 11.
An excitation voltage, for example of volts at 60 cycles per second, is supplied from a suitable power supply (not shown) and appears across terminals 10 and li. (Terminal 10 is grounded.)
When selector switch 28 is closed, electroluminescent layer 24 is energized and emits light, the emitted light illuminating the photoconductor layer 16. If now the data switch 20 is closed, the photoconductive layer 16 being in its low impedance state, the electroluminescent layer 14 will be energized and will emit light. If either of switches 20` or 28 is open, electroluminescent layer 14 will emit no light.
The plurality of the devices of FIG. 1 can be interconnected as shown in FIG. 2. In FIG. 2, there is provided three separate electroluminescent sources, each source being associated with two electroluminescent-photoconductive cells to form a corresponding group. Each source is optically coupled with the photoconductive layers of both associated cells. Each one of the three sources is controlled by a corresponding selector switch 200, 202 or 204. The iirst cells in all groups are controlled in parallel from a tirst data read-in switch 206. The second cells in all groups are controlled in parallel from a second data read-in switch 208.
When switch 206 is closed and switch 208 is open, closing one of selector switches 200, 202 or 204 will cause the first cell in the group corresponding to the closed selector switch to emit light, while all other cells in all groups will be dark. Similarly, if switch 2.06 is open and switch 20S is closed, the second cell in the group corresponding to the closed selector switch will emit light, while all other cells will remain dark. Finally, if switches 206 and 208 are open, all cells in all groups will be dark regardless of the position of the selector switches.
It will be apparent that each group of FIG. 2 can have more than two cells and the number of data read-in i? switches can be increased accordingly. iFurther, if desired, each electroluminescent source can be replaced by a plurality of paralleled electroluminescent sources, each being optically coupled to a single photoconductor-electroluminescent cell.
In the devices thus far described, the energized electroluminescent-photoconductive cells in any group can be de'energized by opening either the appropriate selector switch or the appropriate data switch. It is sometimes necessary to store the illuminated pattern displayed by a group; i.e. maintain the illuminated pattern after either or both types of switches are opened.
This type of storage can be carried out in the manner shown in FIG. 3. The device of FIG. 3 employs the same photoconductive-electroluminescent cell and electroluminescent source as shown in FIG. 2. However, in FIG. 3, an electrode 102 is interposed between the electroluminescent and photoconductive layers 14 and 18.
Further, a portion of the electroluminescent layer' 14 is optically coupled to a photoconductor cell including light transparent electrode 106 and electrode 108 with a photoconductive layer 104 interposed between these electrodes. A light mask 100 optically isolates the portion of electroluminescent layer 14 optically coupled to the photoconductive cell from the remaining portion of the electroluminescent layer 14. The photoconductive cell is connected between electrode 102` and ground.
When data switch 20 and selector switch 28 are both closed, the photoconductor-electroluminescent cell is energized as before. However, light from the energized cell strikes the photoconductive layer 104 and reduces its impedance. Consequently, the electroluminescent( layer 14 is connected effectively directly between terminals and 11. Layer 14 will then remain energized and emit light regardless of the positions of the selector and data switches and can only be deenergized by removing (or sharply reducing) the voltage across terminals 10 and 11.
IFIG. 4 shows a modication of FIG. 3 wherein the portions of the electroluminescent layer optically masked from or optically coupled to the separate photoconductive cell take the form of two separate electroluminescent layers 1.4 and 110 electrically connected in parallel. The device of FIG. 4 operates in the same manner as that of FIG. 3. In FIG. 4, however, the electroluminescent layer `1310 and the separate photoconductor cell can be positioned remote from the electroluminescent-photoconductor display cell, a circuit arrangement sometimes preferable to that of FIG. 3.
It will be apparent that other types of switches, such as automatic electronic or magnetic switches, can be substituted for the manually operated switches shown in the drawings. Indeed, any -two terminal network which yields a pulse train or a pulsating voltage can be substituted for any of the switches shown in the drawings. Hence, the term switch as used herein applies to any of the above.
Further, if desired, the electroluminescent sources shown in the figures can be operated from a first power supply, while the electroluminescent-photoconductive cells and associated elements can be operated from an additional power supply electrically independent from the rst supply.
What is claimed is:
1. A device comprising a pair of terminals adapted for connection to a power supply; an electroluminescentphotoconductor cel-l; a data read-in switch connected in series with said electroluminescent-photoconductor cell between said terminals; an electroluminescent light source optically coupled to the photoconductor element of said electroluminescent-photoconductor cell; a selector switch connected in series with said source between said terminals; and a photoconductor component optically coupled to the electroluminescent element of said cell and electrically connected between the junction of the electroluminescent and photoconductor elements of said cell and the one of said terminals to which said data read-in switch is directly connected.
2. A device comprising a pair of terminals adapted for connection to a power supply; an electroluminescentphotoconductor cell; a data read-in switch connected in series wi-th said electroluminescent-photoconductor cell between said terminals; an electroluminescent light source optically coupled to the photoconductor element of said electroluminescent-photoconductor cell; a selector switch connected in series with said source between said terminals; and a photoconductor component optically coupled to the electroluminescent element of said cell and electrically connected in circuit with said electroluminescent element and said terminals; said component, when illuminated, establishing a direct connection between said electroluminescent element and said terminals.
3. A device comprising a pair of terminals adapted for connection to a power supply; (x) (y) different electroluminescent-photoconductor cells arranged into (x) different cell groups; each group containing (y) dilerent cells; corresponding cells in each group being connected in parallel thereby forming (y) diferent arays of paralleled cells (ly) diierent data read-in switches, each data switch being connected in series with the corresponding array between said terminals; (x) different electroluminescent light sources, each source being optically coupled to the photoconductor elements of all cells in the corresponding group; (x) different selector switches, each selector switch being connected in series with the corresponding source between said terminals; and (x) (y) dilerent photoconductor components, eac-h component being optically coupled to the electroluminescent element of the corresponding cell and being electrically connected in circuit with the corresponding electroluminescent element and said terminal, each component, when illuminated, establishing a direct connection between said electroluminescent element and said terminals.
4. A device comprising a pair of terminals adapted for connection to a power supply; an electroluminescent-photoconductor cell; a data read-in switch connected in series with said electroluminescent-photoconductor cell between said terminals; an electroluminescent light source optically coupled to the photoconductor element of said electroluminescent-photoconductor cell; a selector switch connected in series with said source between said terminals; an electroluminescent component electrically connected in parallel with the electroluminescent element of said cell; and a photoconductor component optically coupled to said electroluminescent component, said photoconductor component being connected in circuit with said elec.- troluminescent component and said terminals, said photoconductor component, when illuminated, establishing a direct connection between said electroluminescent element yand said terminals.
5. A device comprising a pair of terminals adapted for connection to a power supply; (y)(x) different electroluminescent-photoconductor cel-ls arranged into (x) different cell groups, each group containing (y) different cells; corresponding cells in each group being connected in parallel thereby forming (y) different arrays of paralleled cells, (y) different data read-in switches, each data switch being `connected in series with the corresponding array between said terminals; (x) different electroluminescent light sources, each source being optically coupled to lthe photoconductor elements of all cells in the corresponding group; (x) different selector switches, each selector switch being connected in series with the corresponding source between said terminals; (y) (x) different .electroluminescent components, each electroluminescent component being electrically connected in parallel with the electroluminescent element of the corresponding cell; and (x) (y) different photoconductor components, each photoconductor component being optically coupled to the corresponding electroluminescent component and being electrically connected in circuit with the corresponding 5 electroluminescent component and said terminals, each 2,932,746 photoconductor component, when illuminated, establishing a direct connection between said electroluminescent lement and s 'd terminals. e al 1,143,341
5 References Cited in the le of this patent UNITED STATES PATENTS Hanlet Mar. 22, 1960 Jay Apr. 12, 1960 FOREIGN PATENTS France Apr. 8, 1957 OTHER REFERENCES IBM Technical Disclosure Bulletin, V3, No. 4, Sept.
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Cited By (8)

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Publication number Priority date Publication date Assignee Title
US3130348A (en) * 1960-09-09 1964-04-21 Int Standard Electric Corp Arrangement for producing a variable electroluminescent spot subject to position control
US3163764A (en) * 1961-01-03 1964-12-29 Gen Telephone & Elect Electroluminescent switching circuit
US3207906A (en) * 1960-04-06 1965-09-21 Hitachi Ltd Solid state light amplifying device with sintered photoconductor and electro-luminescent input panel
US3210607A (en) * 1961-09-07 1965-10-05 Texas Instruments Inc Ferroelectric capacitor apparatus
US3221170A (en) * 1963-01-28 1965-11-30 Bendix Corp Electroluminescent-photoconductor means for lighted column display
US3321633A (en) * 1963-04-05 1967-05-23 Vincent L Carney Luminous spot shrinking system employing overlapping standing waves
US4130776A (en) * 1978-01-30 1978-12-19 T. L. Robinson Co., Inc. EL bar graph for displaying analogue measurements of temperature and the like
FR2415851A1 (en) * 1978-01-28 1979-08-24 Int Computers Ltd DISPLAY DEVICE

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US2929950A (en) * 1955-12-30 1960-03-22 Electronique & Automatisme Sa Electroluminescence devices
US2932746A (en) * 1957-02-25 1960-04-12 Sylvania Electric Prod Electroluminescent device

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3207906A (en) * 1960-04-06 1965-09-21 Hitachi Ltd Solid state light amplifying device with sintered photoconductor and electro-luminescent input panel
US3130348A (en) * 1960-09-09 1964-04-21 Int Standard Electric Corp Arrangement for producing a variable electroluminescent spot subject to position control
US3163764A (en) * 1961-01-03 1964-12-29 Gen Telephone & Elect Electroluminescent switching circuit
US3210607A (en) * 1961-09-07 1965-10-05 Texas Instruments Inc Ferroelectric capacitor apparatus
US3221170A (en) * 1963-01-28 1965-11-30 Bendix Corp Electroluminescent-photoconductor means for lighted column display
US3321633A (en) * 1963-04-05 1967-05-23 Vincent L Carney Luminous spot shrinking system employing overlapping standing waves
FR2415851A1 (en) * 1978-01-28 1979-08-24 Int Computers Ltd DISPLAY DEVICE
US4130776A (en) * 1978-01-30 1978-12-19 T. L. Robinson Co., Inc. EL bar graph for displaying analogue measurements of temperature and the like

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