WO1997045826A1 - Colour display and uses of such a display - Google Patents
Colour display and uses of such a display Download PDFInfo
- Publication number
- WO1997045826A1 WO1997045826A1 PCT/DE1997/001080 DE9701080W WO9745826A1 WO 1997045826 A1 WO1997045826 A1 WO 1997045826A1 DE 9701080 W DE9701080 W DE 9701080W WO 9745826 A1 WO9745826 A1 WO 9745826A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- display
- color
- red
- green
- applications
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
- H04N9/315—Modulator illumination systems
- H04N9/3164—Modulator illumination systems using multiple light sources
-
- 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
- G09G3/34—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 by control of light from an independent source
- G09G3/3406—Control of illumination source
- G09G3/3413—Details of control of colour illumination sources
-
- 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
- G09G3/34—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 by control of light from an independent source
- G09G3/36—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 by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/16—Analogue secrecy systems; Analogue subscription systems
- H04N7/162—Authorising the user terminal, e.g. by paying; Registering the use of a subscription channel, e.g. billing
- H04N7/163—Authorising the user terminal, e.g. by paying; Registering the use of a subscription channel, e.g. billing by receiver means only
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3102—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators
- H04N9/3105—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators for displaying all colours simultaneously, e.g. by using two or more electronic spatial light modulators
- H04N9/3108—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators for displaying all colours simultaneously, e.g. by using two or more electronic spatial light modulators by using a single electronic spatial light modulator
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0235—Field-sequential colour display
-
- 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
- G09G3/001—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background
Definitions
- LC color displays have been on the market for a long time. They get their brightness from white backlighting, made up of neon fluorescent tubes, halogen lamps, metal halide lamps etc.
- the aim of the invention is to improve the light yield significantly with the aid of simple monochrome LC displays and red, green and blue backlighting in a compact design and, at the same time, to reduce the rejection rate during production due to the simple design. According to the invention this is solved by the technical teaching of claim one.
- a color display can be constructed from just a monochrome LC display, which generates colored images with a cyclic green-blue-red backlight.
- the monochrome display is used as an active shadow mask.
- the backlight can be constructed, for example, from a white light source, which generates the three colors in each case by means of a rotating color disk. To create a color image, the three color components must be mixed together. When generating 25 frames per second, this means that in the simplest case, 1/75 second is available per image and per color.
- the color intensity is generated by opening the micro diaphragm (LCD pixel).
- the compensation of the different brightnesses through inhomogeneities of the lighting is done by a Basic opening time achieved, that is, the darkest blue, red and green correspond to the basic opening time. This value is added to every further color value. It is determined and saved for each pixel in combination with the color. It is therefore also possible, for example, to compensate for color fluctuations in the color disks or in general the color background lighting.
- the individual color components per pixel are combined over several images, so that the image reproduction frequency of the display can be adapted.
- the clock rate of the LC display can therefore be less than 75 frames / s.
- PDLC polymer dispersed liquid crystal
- a variant for controlling the color intensity of the individual pixels is to use the gray value setting of the display. Depending on the intensity
- the individual color pixels can thus be individually controlled.
- the large number of overlapping diode light sources can cause discontinuities in the backlight.
- These local minima and maxima can be compensated for by calibrating the individual pixels. For each color (blue, red, green) there is a significant base gray value for each pixel, so that the viewer of the display has one homogeneously illuminated colored screen per color. This calibration is stored digitally and serves as a comparison of the color values to be projected.
- the digital control between backlight, display and image data is taken over by a powerful controller, preferably by a PC.
- the display can also be used as a PC monitor.
- a display constructed in this way can become a link between our digital and analog image display. It can be sold both as a pure PC and as a simple digital television receiver.
- a particularly interesting application would be the display of high-resolution image and font information, as is typically published by magazines and daily newspapers.
- all technical requirements for projection and storage for information by the PC are available. If you use the distribution of data via TV channels, you have an inexpensive means of transport for the huge flood of data.
- the user only needs a TV receiver in his base unit.
- the data could be sent at tariff-favorable times (e.g. at night) and encrypted using special digital codes.
- the decoding that is possible at any desired time, the user needs a software key that is stored on a check card, or one receives his key digitally via the telephone network. Depending on the system, the fees for using the information can then be debited either when purchasing the software credit cards or directly via the telephone bill.
- the application is particularly useful if the color display according to the invention is used as the basis for a projection device.
- the compact, high-performance diode lighting enables high-quality background lighting to be achieved with a very high degree of efficiency. Weak points of such diode lighting have so far been the blue diodes. This disadvantage has been eliminated since there were 5A-N diodes with 100 times the luminous efficacy compared to SIC LEDs. It is therefore possible to produce a standard backlight with ten times the lifespan and an energy saving of 75% compared to conventional lighting.
- the backlight is of course also suitable for the projection system based on digital micromirrors DMD developed by Texas Instruments.
- the individual micromirrors are clocked here, similar to an LCD cell.
- the local intensity fluctuations would be compensated for here by different flip times of the mirrors.
- the background lighting must be as homogeneous as possible with regard to the three primary colors. This can be done, for example, by means of flat SMD diodes, which are arranged in a significant pattern depending on the color intensity and the radiation angle of the three primary colors red, blue and green.
- the ratio currently applies:
- this ratio can of course shift. It is therefore entirely possible to set up flat backlights for laptops; the installation depth does not correspond to more than 20 to 40 [mm].
- Figure 1 Schematic representation of the display with projection application
- FIG. 1 Schematic representation of an application of the display
- the display according to the invention is shown schematically.
- the three primary colors blue (1), green (2) and red (3) backlight the monochrome display (4, 9).
- the microcontroller (7) preferably a PC, synchronizes the lighting with the display (4, 9) and the individual LCD pixels.
- the image data are supplied via a TV module (8), which consists of a receiving part and a frame grabber, so that the digital image data is sent to the microcontroller via a fast data bus, preferably PCI.
- the image from the color display can be enlarged onto projection screens (6) of any size using an optical lens system (5).
- FIG. 2 shows schematically how the fee-based data are billed.
- the display (9) with controller has a TV receiver (10) and a telephone connection (12) as well as a telephone card reader (11) or similar pay card systems. Equipped in this way, any amount of data can be transmitted via TV channels and can be selectively and independently saved and retrieved by the customer.
- One application would be e.g. B. the distribution of regional daily newspapers.
- the display according to the invention can be used anywhere in technical devices. Not only does it represent a high utility value due to its high quality optical images, it is also of great benefit from an energy policy and economic perspective. If one takes into account that the lifespan of diode lighting is 10 times as long as standard filament lighting with 75% energy savings at the same time, one or two nuclear or coal-fired power plants with an output of three to can easily be used with the invention as a TV device save five gigawatts.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU32531/97A AU3253197A (en) | 1996-05-31 | 1997-05-30 | Colour display and uses of such a display |
EP97928108A EP0976123A1 (en) | 1996-05-31 | 1997-05-30 | Colour display and uses of such a display |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19621911.6 | 1996-05-31 | ||
DE19621911A DE19621911C2 (en) | 1996-05-31 | 1996-05-31 | Color display and applications |
DE19627729A DE19627729A1 (en) | 1996-05-31 | 1996-07-10 | Color display, made up of a monochrome display with tri-color LED backlighting |
DE19627729.9 | 1996-07-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997045826A1 true WO1997045826A1 (en) | 1997-12-04 |
Family
ID=26026209
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1997/001080 WO1997045826A1 (en) | 1996-05-31 | 1997-05-30 | Colour display and uses of such a display |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0976123A1 (en) |
AU (1) | AU3253197A (en) |
DE (2) | DE19621911C2 (en) |
WO (1) | WO1997045826A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19925318C1 (en) * | 1999-05-27 | 2001-02-15 | Globalpatent Consulting Gmbh | Color image projector with time-controlled LED light sources |
EP1936429A3 (en) * | 1998-07-28 | 2008-11-26 | Nippon Telegraph and Telephone Corporation | Optical device and display apparatus |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA2321778C (en) * | 1998-03-06 | 2004-06-29 | Matsushita Electric Industrial Co., Ltd. | Lcd projector |
DE102017004500A1 (en) * | 2017-05-10 | 2018-11-15 | Michael Buczek | A method and apparatus for displaying a multicolor image on a backlit display without components that reduce the resolution of a display. |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1990005429A1 (en) * | 1988-10-31 | 1990-05-17 | Raychem Limited | Frame-sequential colour display system |
US5128782A (en) * | 1989-08-22 | 1992-07-07 | Wood Lawson A | Liquid crystal display unit which is back-lit with colored lights |
US5359345A (en) * | 1992-08-05 | 1994-10-25 | Cree Research, Inc. | Shuttered and cycled light emitting diode display and method of producing the same |
WO1995020811A1 (en) * | 1994-01-31 | 1995-08-03 | Sdl, Inc. | Laser illuminated display system |
EP0713333A1 (en) * | 1994-11-19 | 1996-05-22 | Società Italiana per lo Sviluppo dell'Elettronica S.I.SV.EL. S.p.A. | Television receiver with apparatus for the quick exchange of data concerning instructions and/or functions |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3633708A1 (en) * | 1986-10-03 | 1988-04-14 | Bernd Haastert | Passive or active displays with peripheral, partially integrated and fully integrated activation |
DE4027858A1 (en) * | 1990-09-03 | 1992-03-05 | Vdo Schindling | DISPLAY DEVICE |
-
1996
- 1996-05-31 DE DE19621911A patent/DE19621911C2/en not_active Expired - Fee Related
- 1996-07-10 DE DE19627729A patent/DE19627729A1/en not_active Withdrawn
-
1997
- 1997-05-30 WO PCT/DE1997/001080 patent/WO1997045826A1/en not_active Application Discontinuation
- 1997-05-30 AU AU32531/97A patent/AU3253197A/en not_active Abandoned
- 1997-05-30 EP EP97928108A patent/EP0976123A1/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1990005429A1 (en) * | 1988-10-31 | 1990-05-17 | Raychem Limited | Frame-sequential colour display system |
US5128782A (en) * | 1989-08-22 | 1992-07-07 | Wood Lawson A | Liquid crystal display unit which is back-lit with colored lights |
US5359345A (en) * | 1992-08-05 | 1994-10-25 | Cree Research, Inc. | Shuttered and cycled light emitting diode display and method of producing the same |
WO1995020811A1 (en) * | 1994-01-31 | 1995-08-03 | Sdl, Inc. | Laser illuminated display system |
EP0713333A1 (en) * | 1994-11-19 | 1996-05-22 | Società Italiana per lo Sviluppo dell'Elettronica S.I.SV.EL. S.p.A. | Television receiver with apparatus for the quick exchange of data concerning instructions and/or functions |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1936429A3 (en) * | 1998-07-28 | 2008-11-26 | Nippon Telegraph and Telephone Corporation | Optical device and display apparatus |
DE19925318C1 (en) * | 1999-05-27 | 2001-02-15 | Globalpatent Consulting Gmbh | Color image projector with time-controlled LED light sources |
Also Published As
Publication number | Publication date |
---|---|
DE19627729A1 (en) | 1998-02-26 |
EP0976123A1 (en) | 2000-02-02 |
AU3253197A (en) | 1998-01-05 |
DE19621911C2 (en) | 1998-09-10 |
DE19621911A1 (en) | 1997-12-11 |
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