CN100421259C - Organic luminous display panel - Google Patents
Organic luminous display panel Download PDFInfo
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- CN100421259C CN100421259C CNB2003101240447A CN200310124044A CN100421259C CN 100421259 C CN100421259 C CN 100421259C CN B2003101240447 A CNB2003101240447 A CN B2003101240447A CN 200310124044 A CN200310124044 A CN 200310124044A CN 100421259 C CN100421259 C CN 100421259C
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Abstract
The present invention discloses an organic luminous display panel which comprises a base plate with a plurality of defined first pixel areas, second pixel areas and third pixel areas, a heating circuit structure and a plurality of programmable organic luminous diodes arranged in the first pixel areas, the second pixel areas and the third pixel areas on the heating circuit structure, wherein the heating circuit structure is used for defining the luminous colors of the organic luminous diodes in the first pixel areas and the second pixel areas.
Description
Technical field
The present invention relates to a kind of organic electroluminescence display panel (organic light emitting display panel, OLED panel), relate in particular to a kind of heating circuit (heating circuit) and can utilize heating process (heating process) directly to produce the organic electroluminescence display panel of the pixel (pixel) of different colours of having.
Background technology
Along with making rapid progress of science and technology, frivolous, power saving, portable intelligent information product have been full of our living space, display has then been played the part of considerable role betwixt, no matter be mobile phone, personal digital assistant or notebook computer, all need the interface of display as man-machine communication.Display is at high image quality, big picture, existing very much progress under the demand cheaply in recent years, wherein under the successful exploitation of organic material, organic light emitting display is with advantages such as simple structure and splendid working temperature, contrast, visual angles, in the monitor market, attracted attention gradually, even outmatch LCD (liquid crystal display, LCD) or cathode ray tube (cathode ray tube, CRT) trend on the display.
Because luminous organic material is a current driven light-emitting element, and can produce the light of different brightness according to the size of the electric current that is passed through, therefore as long as the colored filter (colorfilter) of collocation appropriate color, organic light emitting display can make full use of red, blue, the green glow that this specific character produces different gray scales, produces coloury image further to make display.
See also Fig. 1 and Fig. 2.Fig. 1 and Fig. 2 are the existing schematic diagram that utilizes three color pixels to make organic electroluminescence display panel 10.As shown in Figure 1, existing organic electroluminescence display panel 10 is formed on the transparency carrier 12, and transparency carrier 12 can be glass (glass) substrate, plastics (plastic) substrate or quartz (quartz) substrate.Transparency carrier 12 surfaces are provided with one drive circuit, which is provided with an insulating barrier 16, a plurality of Organic Light Emitting Diodes that are arranged are formed on the insulating barrier 16, and on each Organic Light Emitting Diode, form the colored filter of appropriate color, with formation red pixel 18, blue pixel 22 and green pixel 24, and adjacent red pixel 18, blue pixel 22 and green pixel 24 constitute a colour element 20.
See also Fig. 2, the generalized section that Fig. 2 dissects for organic electroluminescence display panel 10 A-A ' along the line shown in Figure 1.As shown in Figure 2, (seeing also Fig. 1) includes one and is formed at insulating barrier 16 lip-deep transparency conducting layers (transparentconductive layer) 26 among each pixel 18,22 and 24 of organic electroluminescence display panel 10, and this layer is used to be used as the anode (anode) of each Organic Light Emitting Diode; One is formed at the lip-deep organic luminous layer (organic luminous layer) 28 of transparency conducting layer 26, and one be formed at organic luminous layer 28 lip-deep metal levels (metal layer) 32, and this layer is used to be used as the negative electrode (cathode) of each Organic Light Emitting Diode.
Wherein, transparency conducting layer 26 comprises a tin indium oxide (indium tin oxide, ITO) layer or indium zinc oxide (indium zinc oxide, IZO) layer, organic luminous layer 28 then comprises an electric hole transport layer (hole transport layer who is formed in regular turn on the transparency conducting layer 26 respectively, HTL) (not shown), a luminescent layer (emitting layer, EL) (not shown) and an electron transfer layer (electron transport layer, ETL) (not shown).Metal level 32 is made of the metal or alloy of low work function, generally includes magnesium metal level (Mg layer), aluminum metal layer (Al layer) or lithium/ag alloy layer (Li/Ag alloy layer).
In the prior art, by sending red, blue, the green three color colo(u)r filters of Organic Light Emitting Diode collocation of white light, produce red, blue, green three color pixels, mostly to constitute colour element.Yet the method need be provided with colored filter, on technology, need to control algnment accuracy (alignmentaccuracy) again, in order to avoid cause the inhomogeneous of three coloured light, thus often its layout (layout) there is extra restriction, and then aperture opening ratio (aperture ratio) is reduced.Therefore, develop a kind of new organic electroluminescence display panel and just become current important topic to solve the existing in prior technology problem.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of organic electroluminescence display panel, and a kind of organic electroluminescence display panel with Organic Light Emitting Diode of heating circuit structure and programmable especially is provided.
The organic electroluminescence display panel that is provided comprises in embodiments of the present invention: a definition has the substrate of a plurality of first pixel regions, second pixel region and the 3rd pixel region; One heating circuit structure; And a plurality of Organic Light Emitting Diodes that are arranged at the programmable in structural each first pixel region of heating circuit, second pixel region and the 3rd pixel region respectively.Wherein, the heating circuit structure comprises many first heater wire and many second heater wires of being located at first pixel region and second pixel region respectively, to be used for defining the glow color of each Organic Light Emitting Diode in each first pixel region and each second pixel region.
Because organic electroluminescence display panel of the present invention is that a heating circuit is set under the part Organic Light Emitting Diode, the Organic Light Emitting Diode that utilizes heating process will send ruddiness and green glow again creates, therefore, not only do not need to use colored filter, and can avoid the problem of algnment accuracy, and also can improve aperture opening ratio, do not need corresponding different colours that different organic films is set again, make manufacturing step simple, extra problem is unlikely to derive because of complicated step.Generally speaking, organic electroluminescence display panel of the present invention has low cost, heat treatment step is easy and the output advantages of higher.
Description of drawings
Fig. 1 and Fig. 2 are existing organic electroluminescence display panel schematic diagram;
Fig. 3 to Fig. 8 is the organic electroluminescence display panel schematic diagram of first embodiment of the invention;
Fig. 9 is the generalized section of the organic electroluminescence display panel of second embodiment of the invention.
Description of reference numerals
10 organic electroluminescence display panels, 12 substrates
16 insulating barriers, 18 red pixels
22 green pixels, 24 blue pixel
26 transparency electrodes, 28 organic luminous layers
32 metal levels, 110 organic electroluminescence display panels
112 substrates, 114 pixel regions
The 114a first pixel region 114b second pixel region
114c the 3rd pixel region 116 leads
117 first insulating barriers, 118 first contact holes
124 first heater wires, 126 second heater wires
128 grounding electrodes, 130 heating circuits
131 second insulating barriers, 132 Organic Light Emitting Diodes
133 transparency electrodes, 134 blue pixel
135 organic luminous layers, 136 green pixels
137 metal levels, 138 red pixels
140 colour elements, 212 substrates
The 214a first pixel region 214b second pixel region
214c the 3rd pixel region 217 first insulating barriers
224 first heater wires, 226 second heater wires
231 second insulating barrier 231a, first dielectric material
231b second dielectric material 232 Organic Light Emitting Diodes
Embodiment
See also Fig. 3 to Fig. 8, Fig. 3 to Fig. 8 is the schematic diagram of the organic electroluminescence display panel 110 of the preferred embodiment for the present invention.As shown in Figure 3, organic electroluminescence display panel 110 of the present invention comprises a transparency carrier 112, transparency carrier 112 can be glass substrate, plastic base or quartz base plate, definition has a pixel array region (pixel array area on transparency carrier 112, do not show) and a periphery circuit region (periphery circuit area does not show).Defining again in the pixel array region has a plurality of pixel regions (pixelarea) 114, be used for holding each OLED element and mutual with it pixel-driving circuit of arranging in pairs or groups, and periphery circuit region is used for holding control circuit (control circuit).Because emphasis of the present invention and periphery circuit region are irrelevant, so do not give unnecessary details.It should be noted that pixel region 114 is made of a plurality of first pixel region 114a, the second pixel region 114b and the 3rd pixel region 114c.In preferred implementation of the present invention, the first pixel region 114a, the second pixel region 114b and the 3rd pixel region 114c are used as red pixel district, green pixel district and blue pixel district respectively.
Organic electroluminescence display panel 110 comprises that also one is formed at the lead 116 on substrate 112 surfaces, wherein, holding wire (signalline on lead 116 and the organic electroluminescence display panel 110, do not show) by same metal level composition is formed, lead 116 comprises tungsten line (W line), chromium line (Cr line) or other conductive metal wires.
As shown in Figure 4, organic electroluminescence display panel 110 comprises that first insulating barrier (first insulating layer), 117, the first insulating barriers 117 that are formed on the substrate 112 cover each pixel region 114 and lead 116.Be provided with a plurality of first contact holes (first contact hole) 118 among first insulating barrier 117, and each first contact hole 118 exposes part lead 116 respectively.First insulating barrier 117 comprises that one is the silicon oxide layer (TEOS-SiO of reacting gas with the tetraethoxysilane
2Layer), an one silica layer (siliconoxide layer) or a silicon nitride layer (silicon nitride layer).
As Fig. 4 and shown in Figure 5, organic electroluminescence display panel 110 also comprises many first heater wires (first heating wire) 124 and many second heater wires (secondheating wire) 126 that are formed on the transparency carrier 112, and each first heater wire 124 and each second heater wire 126 are electrically connected to first lead 116 respectively via each first contact hole 118.Each first heater wire 124 and respectively second heater wire, 126 difference cover parts each the first pixel region 114a and second pixel region 114b simultaneously.Each first heater wire 124 and each second heater wire 126 are made by tin indium oxide or indium zinc oxide, and the width (width) of each first heater wire 124 and each second heater wire 126 is rough identical.
Be formed with a grounding electrode (ground electrode) 128 on the substrate 112 in addition, grounding electrode 128 is electrically connected to each first heater wire 124 and each second heater wire 126, stablize with the voltage of keeping on each first heater wire 124 and each second heater wire 126 as far as possible, and constitute heating circuit structures 130 jointly with lead 116, first heater wire 124 and second heater wire 126.In fact, grounding electrode 128 also can be a common electrode that is electrically connected to other voltage, as long as can provide a stable voltage difference so that utilize each heater wire 124,126 to heat jointly with lead 116.
As Figure 6 and Figure 7, be formed with one second insulating barrier 131 on the substrate 112, second insulating barrier 131 covers heating circuit structure 130, and be provided with a plurality of second contact hole (not shown)s among second insulating barrier 131, and second insulating barrier 131 in the first pixel region 114a and the second pixel region 114b has different-thickness, in preferred implementation of the present invention, reduce the thickness of second insulating barrier 131 in the first pixel region 114a by an etch-back operation so that among the first pixel region 114a distance of 124 of each Organic Light Emitting Diode 132 and first heater wires less than the distance of 126 of each Organic Light Emitting Diode 132 among the second pixel region 114b and second heater wires.
In addition, organic electroluminescence display panel 110 also comprises and being formed on second insulating barrier 131 and corresponding to a plurality of Organic Light Emitting Diodes 132 of each pixel region 114.Each Organic Light Emitting Diode 132 includes one and is formed at transparency electrode 133, on second insulating barrier 131 and is formed at organic luminous layer 135 and on the transparency electrode 133 and is formed at metal level 137 on the organic luminous layer 135.Wherein, each transparency electrode 133 can be an indium tin oxide layer or an indium zinc oxide layer, and be used for being used as the anode (anode) of each Organic Light Emitting Diode 132, metal level 137 can be a magnesium metal level, an aluminum metal layer, a lithium metal level or an alloy-layer, and is used for being used as the negative electrode (cathode) of each Organic Light Emitting Diode 132.In fact, looking actual needs metal level 137 can cover on all pixel regions 114 comprehensively, or is covered in individually on each pixel region 114.Each transparency electrode 133 of each Organic Light Emitting Diode 132 is electrically connected to the image element circuit of being located at substrate 112 surfaces via each second contact hole (not shown), carries out the image demonstration to drive each Organic Light Emitting Diode 132 by this image element circuit.
Organic luminous layer 135 also comprises an electric hole transport layer (not shown), a luminescent layer (not shown) that is formed in regular turn on the transparency electrode 133, and an electron transfer layer (not shown).In addition, when practical application, also can between transparency electrode 133 and electric hole transport layer (not shown), add an electric hole implanted layer (not shown) according to the demand of element or operation, or between metal level 137 and electron transfer layer (not shown), add an electron injecting layer (not shown), be used for improving organic luminous layer 135 and anode/cathode and engage the problem of being derived, be beneficial to electronics or electric hole and inject among the organic luminous layer 135.Moreover, also can select to utilize luminescent layer, or have the electric hole transport layer of luminous power with electron transport ability, with the use of minimizing organic film, and then simplified manufacturing technique.
It should be noted that, each Organic Light Emitting Diode 132 of the present invention is can be by the Organic Light Emitting Diode of temperature programization, organic luminous layer wherein is under the uniform temperature condition, can produce chemical change and change its glow color, therefore can utilize different temperature to define the glow color of each Organic Light Emitting Diode 132, and described chemical change is irreversible chemical change, in other words, in case after utilizing a predetermined temperature to define an Organic Light Emitting Diode 132, its glow color will can not change once more.For instance, in case utilize a predetermined temperature to make an Organic Light Emitting Diode 132 produce red light output, this Organic Light Emitting Diode 132 will only be exported ruddiness so.
As shown in Figure 8, lead 116 is electrically connected to a voltage source via an external power cord (not shown), therefore, when an applied voltage puts on the heating circuit structure 130 via lead 116, corresponding electric current will flow through each first heater wire 124 and each second heater wire 126, and begin to heat, so that define the glow color of each Organic Light Emitting Diode 132 of top with different temperatures.As previously mentioned, because the thickness of second insulating barrier, 131 (not shown)s in the first pixel region 114a (seeing also Fig. 4) is less than the thickness of second insulating barrier 131 in the second pixel region 114b (seeing also Fig. 4), therefore, in heating process, each Organic Light Emitting Diode 132 has higher temperature in the first pixel region 114a, the temperature of each Organic Light Emitting Diode 132 is then a little less than the temperature of each Organic Light Emitting Diode in the first pixel region 114a in the second pixel region 114b, the 3rd pixel region 114c (seeing also Fig. 4) that the below is not provided with first heater wire 124 or second heater wire 126 then is not subjected to the influence of this heating process, make the pixel region 114a that wins, the Organic Light Emitting Diode 132 of the second pixel region 114b and the 3rd pixel region 114c becomes the Organic Light Emitting Diode 132 of different colours respectively, to form red pixel 138 respectively, green pixel 136 and blue pixel 134, and adjacent red pixel 138, green pixel 136 and blue pixel 134 constitute a colour element 140.
What deserves to be mentioned is, the rough width that is same as each Organic Light Emitting Diode 132 of width of each first heater wire 124 and each second heater wire 126, with the uniformity of raising heating, and then the uniformity of raising blue light, ruddiness and green glow.And each first heater wire 124 and each second heater wire 126 can have Any shape, and are not limited to strip (stripe) structure of exemplary illustration among the figure.Comprise mosaic arrangement (Mosaic Type) owing to send the arrangement mode of the Organic Light Emitting Diode 132 of green glow, ruddiness, blue light, delta arrangement (Triangle Type) or striped arrangement (Stripe Type) etc., each first heater wire 124 and each second heater wire 126 also can be broken line or other form.In fact, as long as each first heater wire 124 and each second heater wire 126 can cover on each pixel region 114 of desire heating equably and reach the purpose of even heating.
In addition, each pixel region 114 includes an image element circuit of being located at described transparency carrier 112 surfaces, this circuit comprises a plurality of thin-film transistor (not shown)s, to utilize different drive currents to drive each Organic Light Emitting Diode 132 in each red pixel 138, green pixel 136 and the blue pixel 134 and the luminosity that each Organic Light Emitting Diode 132 is produced corresponding to this drive circuit.Heating circuit provided by the present invention not only can be applied to active matrix (active matrix) formula panel simultaneously, can also be applied to passive matrix (passive matrix) formula panel.
See also Fig. 9, Fig. 9 is the generalized section of the organic electroluminescence display panel of second embodiment of the invention.As shown in Figure 9, in second execution mode of the present invention, its structure is similar to aforementioned first execution mode, comprise a substrate 212 and one first insulating barrier 217 equally, also be provided with one first pixel region 214a, one second pixel region 214b and one the 3rd pixel region 214c on it equally, can be and also be formed with one respectively in each pixel region 214a, 214b, the 214c by the Organic Light Emitting Diode 232 of temperature programization, and also comprise a heating circuit, have first heater wire 224 and second heater wire 226 of being located at the first pixel region 214a and second pixel region 214b below respectively.The main difference part is that second insulating barrier 231 of present embodiment comprises multiple dielectric material with different heat transfer coefficient, forms temperature difference between the first pixel region 214a and the second pixel region 214b to utilize materials variances.Satisfying under the situation of above-mentioned condition, second insulating barrier 231 can have various compositions and structure, do not enumerate one by one at this, and below be example only with Fig. 9, the structure and the manufacture method of second insulating barrier 231 in the preferred embodiment for the present invention is described.As shown in Figure 9, the manufacture method of second insulating barrier 231 of present embodiment is: form one second dielectric materials layer 231b earlier on substrate 212, again by an etch-back operation, the second dielectric materials layer 231b in the first pixel region 214a is optionally removed, and in the first pixel region 214a, form one first dielectric materials layer 231a, to be used for separating first heater wire 224 and Organic Light Emitting Diode 232, and the first dielectric materials layer 231a is made of with respect to the second dielectric materials layer 231b the high heat transfer coefficient material, therefore, in the first pixel region 214a, the thermal impedance that heating circuit and Organic Light Emitting Diode are 232 is lower than the thermal impedance of 232 of heating circuits and Organic Light Emitting Diode in the second pixel region 214b, in other words, under the situation that first heater wire 224 and second heater wire 226 heat with equal-wattage, Organic Light Emitting Diode 232 in the first pixel region 214a will have higher temperature, so can reach the purpose that defines the glow color of each Organic Light Emitting Diode with different temperatures.
In aforesaid two execution modes, though the difference of thickness by second insulating barrier or material changes the thermal impedance between heating circuit and each Organic Light Emitting Diode respectively, so that this heating circuit can define the glow color of Organic Light Emitting Diode with different temperatures, yet the present invention is not limited to this, as long as can utilize different temperatures to define the Organic Light Emitting Diode of different colours.For example can form different thermal impedances in conjunction with second thickness of insulating layer and materials variances simultaneously, perhaps also can directly suitably adjust, make first heater wire and second heater wire have the different thermal outputs that adds heating circuit.For example can change the thickness of first heater wire and second heater wire, so that it has different heating powers, perhaps can form many disjunct leads, for example at least one first lead and one second lead, be electrically connected to first heater wire and second heater wire respectively, by different external voltage sources each Organic Light Emitting Diode in each pixel region is heated again, or the difference by resistance between first lead and second lead, with identical external voltage source each Organic Light Emitting Diode in each pixel region is heated, reach the purpose of the Organic Light Emitting Diode that forms different colours to utilize different heating powers.
Compared with prior art, organic electroluminescence display panel of the present invention is that a heating circuit is set under the part Organic Light Emitting Diode, and the Organic Light Emitting Diode that utilizes a heating process will send ruddiness and green glow is again made.Thus, not only do not need to use colored filter, also can avoid the problem of algnment accuracy, and can improve aperture opening ratio, do not need corresponding different colours that different organic films is set again, and can guarantee that manufacturing process is simple, so can effectively improve the manufacturing cost that output also can reduce organic electroluminescence display panel significantly.
The above only is a preferred implementation of the present invention, and all equivalent variations and modifications of making in the described protection range of claims of the present invention all fall within the present invention's scope required for protection.
Claims (10)
1. organic electroluminescence display panel comprises:
One substrate, definition has a plurality of first pixel regions, second pixel region and the 3rd pixel region on it;
One second insulating barrier;
A plurality of Organic Light Emitting Diodes; And
One heating circuit structure, this heating circuit structure comprises:
At least one lead that places on the described substrate;
One is formed at first insulating barrier on the described substrate, and this layer has a plurality of first contact holes that expose described lead;
Many first heater wires that are formed on described first insulating barrier, this described first pixel region in first heater wire cover part, and be electrically connected to described lead via described each first contact hole;
Many second heater wires that are formed on described first insulating barrier, this described second pixel region in second heater wire cover part, and be electrically connected to described lead via described each first contact hole; And
One is electrically connected to the grounding electrode of described each first heater wire and each second heater wire;
Wherein said second insulating barrier is formed on the described substrate and covers the described a plurality of Organic Light Emitting Diodes of described heating circuit structure and is formed at respectively in described each first pixel region, each second pixel region and each the 3rd pixel region on described second insulating barrier, and described heating circuit structure makes the pixel region of winning, second pixel region and the 3rd pixel region have the temperature that differs from one another.
2. organic electroluminescence display panel as claimed in claim 1, wherein, described lead is electrically connected to an external power source, so that each described Organic Light Emitting Diode that described first heater wire and second heater wire are opposite to respectively above them heats.
3. organic electroluminescence display panel as claimed in claim 2, wherein, described first heater wire and second heater wire utilize different temperatures to define corresponding described Organic Light Emitting Diode respectively, so that be positioned at the light that the Organic Light Emitting Diode of described each first pixel region, each second pixel region and each the 3rd pixel region produces different colours.
4. organic electroluminescence display panel as claimed in claim 1, wherein, described second insulating barrier that is positioned at described second insulating barrier of described first heater wire top and is positioned at described second heater wire top has different thickness.
5. organic electroluminescence display panel as claimed in claim 1, wherein, described first heater wire has different thickness with second heater wire.
6. organic electroluminescence display panel as claimed in claim 1, wherein, described second insulating barrier comprises multiple dielectric material, these dielectric materials have different thermal transmission coefficients.
7. organic electroluminescence display panel as claimed in claim 1, wherein, each described first heater wire sends green glow in order to heat each Organic Light Emitting Diode in each described first pixel region so that be positioned at each Organic Light Emitting Diode of each first pixel region; Each described second heater wire sends ruddiness in order to heat each Organic Light Emitting Diode in each described second pixel region so that be positioned at each Organic Light Emitting Diode of each second pixel region.
8. organic electroluminescence display panel as claimed in claim 7, wherein, not heated each Organic Light Emitting Diode sends blue light.
9. organic electroluminescence display panel as claimed in claim 1, wherein, each described Organic Light Emitting Diode comprises:
One is formed at the transparency electrode on described second insulating barrier, and each transparency electrode is used for being used as the anode of described each Organic Light Emitting Diode;
One is formed at the organic luminous layer on the described transparency electrode; And
One is formed at the metal level on the described organic luminous layer, and each metal level is used for being used as the negative electrode of described each Organic Light Emitting Diode.
10. organic electroluminescence display panel as claimed in claim 1, wherein, each described first heater wire and each second heater wire are made by tin indium oxide or indium zinc oxide.
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| CNB2003101240447A CN100421259C (en) | 2003-12-31 | 2003-12-31 | Organic luminous display panel |
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| CNB2003101240447A CN100421259C (en) | 2003-12-31 | 2003-12-31 | Organic luminous display panel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7315118B2 (en) | 2004-05-28 | 2008-01-01 | Au Optronics Corporation | Combinational structures for electro-luminescent displays |
| CN100428259C (en) * | 2006-11-02 | 2008-10-22 | 华为技术有限公司 | Method and system of preventing digital watermark losing in content adapting and digital copyright center |
| JP4623138B2 (en) * | 2008-05-21 | 2011-02-02 | ソニー株式会社 | Display device and electronic device |
| CN105428554B (en) * | 2015-12-21 | 2018-02-13 | 广东聚华印刷显示技术有限公司 | One kind printing OLED and preparation method thereof |
| TWI775561B (en) * | 2021-08-11 | 2022-08-21 | 友達光電股份有限公司 | Display device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6127783A (en) * | 1998-12-18 | 2000-10-03 | Philips Electronics North America Corp. | LED luminaire with electronically adjusted color balance |
| WO2002047438A2 (en) * | 2000-12-07 | 2002-06-13 | Koninklijke Philips Electronics N.V. | Led luminary system |
| CN1443304A (en) * | 2000-12-27 | 2003-09-17 | 皇家菲利浦电子有限公司 | Luminaire with multicolored array of LEDS |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6127783A (en) * | 1998-12-18 | 2000-10-03 | Philips Electronics North America Corp. | LED luminaire with electronically adjusted color balance |
| WO2002047438A2 (en) * | 2000-12-07 | 2002-06-13 | Koninklijke Philips Electronics N.V. | Led luminary system |
| CN1443304A (en) * | 2000-12-27 | 2003-09-17 | 皇家菲利浦电子有限公司 | Luminaire with multicolored array of LEDS |
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