CN101907806A

CN101907806A - Image display system

Info

Publication number: CN101907806A
Application number: CN2009101469608A
Authority: CN
Inventors: 彭冠臻; 西川龙司
Original assignee: Toppoly Optoelectronics Corp
Current assignee: TPO Displays Corp
Priority date: 2009-06-08
Filing date: 2009-06-08
Publication date: 2010-12-08

Abstract

The invention discloses an image display system. The system comprises a reflective liquid crystal display device, wherein the reflective liquid crystal display device comprises a first substrate, a second substrate, a liquid crystal layer, a plurality of first electrodes, a second electrode and an organic luminous layer. The second substrate is arranged above the first substrate, and the liquid crystal layer is arranged between the first substrate and the second substrate. A luminous device consists of the first electrodes, the second electrode and the organic luminous layer, is arranged between the second substrate and the liquid crystal layer, and is used as a light source of the reflective liquid crystal display device. Meanwhile, the second electrode serves as a common electrode for controlling the liquid crystal layer.

Description

Image display system

Technical field

The present invention relates to a kind of flat-panel screens technology, the reflective liquid-crystal display device of particularly a kind of integration front optical module (front light module).

Background technology

Because the characteristic of thin thickness, in light weight and low power consumption, LCD is widely used in the electronic installation, for example luggable computer, PDA(Personal Digital Assistant), and mobile phone etc.Usually LCD is divided into penetration and reflective two types.The former utilizes backlight module (back light module) as light source, and the latter then utilizes surround lighting as light source.Penetrating LCD can present high contrast ratio and good color saturation.Yet, because the electricity needs of backlight module makes the LCD of penetration be difficult to effectively reduce the loss of electric power.

The LCD that is different from penetration, reflective liquid-crystal display can utilize surround lighting to have the advantage of power saving as light source under bright surround lighting.In order to operate reflective liquid-crystal display under dim surround lighting, reflective liquid-crystal display also needs extra assembling front optical module usually, thereby as penetrating LCD, can't effectively reduce the display integral thickness and reduce manufacturing cost.

Yet, along with the upwards development of electronic product, the thickness of above-mentioned LCD, weight, and power consumption do not met current requirements.Therefore, be necessary to seek a kind of new liquid crystal indicator structure, it can improve thickness, weight and the power consumption of display itself.

Summary of the invention

One embodiment of the invention provides a kind of image display system, comprising: reflective LCD device, it comprises: first substrate, second substrate, liquid crystal layer, a plurality of first electrode, second electrode, and organic luminous layer.First substrate has pixel unit array.Second substrate is arranged at first substrate top and liquid crystal layer is arranged between first substrate and second substrate.First electrode is arranged between second substrate and the liquid crystal layer and corresponding to each pixel cell of pixel unit array, wherein pixel cell comprises reflecting electrode.Second electrode is arranged between first electrode and the liquid crystal layer, with the public electrode as the control liquid crystal layer.Organic luminous layer is arranged between first electrode and second electrode, wherein first electrode, second electrode, and organic luminous layer constitute light-emitting device, to provide light source to reflecting electrode.

Description of drawings

Fig. 1 shows the image display system diagrammatic cross-section that has reflective LCD device according to an embodiment of the invention;

Fig. 2 shows pixel cell diagrammatic cross-section among Fig. 1; And

Fig. 3 shows image display system block schematic diagram according to another embodiment of the present invention.

Description of reference numerals

10～cushion; 20,30～thin film transistor (TFT); 40～storage capacitors; 50～the first middle layers, 55～conductive plunger; 60～the second middle layers, 70～protective seam; 80～pixel electrode; 100～the first substrates; 102～pixel unit array; 102a～pixel cell; 104～liquid crystal layer; 105～insulation course; 106～the second electrodes; 106a～second electrode wiring; 108～organic luminous layer; 110～the first electrodes; 110a～first electrode wiring; 112～black matrix"; 114～colorful optical filter array; 116～the second substrates; 117～blooming; 118～metal line; 120～metal lotion; 122～flexible printed wiring board; 200～reflective LCD device; 300～flat-panel screens; 400～input block; 500～electronic installation; L1, L2～light source; I～viewing area; II～non-display area.

Embodiment

The below making and the use of the explanation embodiment of the invention.Yet, can understand embodiment provided by the present invention easily and only be used for explanation with ad hoc approach making and use the present invention, be not in order to limit to scope of the present invention.

The image display system of the embodiment of the invention below is described.Fig. 1 shows the image display system diagrammatic cross-section with reflective LCD device 200 according to the embodiment of the invention.In the present embodiment, reflective LCD device 200 comprises first substrate 100, second substrate 116, liquid crystal layer 104, reaches the light-emitting device as front located light source (front light source).

First substrate 100 has viewing area I and non-display area II, and can be made of glass, quartz or other transparent materials.Pixel unit array 102 is positioned on the viewing area I of first substrate 100, and a plurality of metal line 118 and electrically connect the flexible circuit board of metal line 118 (flexible printed circuit, FPC) 122 are positioned on the non-display area II of first substrate 100.

Please refer to Fig. 2, it shows pixel cell 102a diagrammatic cross-section among Fig. 1.In one embodiment, pixel cell 102a can comprise: and two thin film transistor (TFT)s (thin film transistor, TFT) 20 and 30, storage capacitors 40 and pixel electrode 80.Thin film transistor (TFT) 20 and 30 and storage capacitors 40 be attached on first substrate 100 by cushion 10 usually.First middle layer 50, second middle layer 60 and protective seam 70 are stacked in thin film transistor (TFT) 20 and 30 and storage capacitors 40 tops in regular turn.Pixel electrode 80 is arranged at protective seam 70 tops in order to the reflecting electrode as reflective LCD device 200, and it comprises nontransparent reflecting material, for example metal.In other embodiments, pixel electrode 80 can comprise nontransparent reflecting material and transparent conductive material, for example indium tin oxide (indium tin oxide, ITO).Moreover, pixel electrode 80 by be formed in first middle layer 50 and second middle layer 60 conductive plungers 55 and with thin film transistor (TFT) 20 and 30 and storage capacitors 40 electrically connect.

Second substrate 116 can be made of glass, quartz or other transparent materials equally.In the present embodiment, colorful optical filter array 114 can be arranged on second substrate 116, and the corresponding pixel unit array 102 that is intended for first substrate 100, and black matrix" 112 is arranged on second substrate 116 equally, and in colorful optical filter array 114 between each colored filter.The reflectivity on the surface that black matrix" 112 is adjacent with second substrate 116 is less than 20%, and its material can comprise: chromium oxide, chromium nitride, titanium nitride, molybdenum nitride or resin material.In another embodiment, colorful optical filter array (not illustrating) correspondence can be arranged on the pixel unit array 102 of first substrate 100.

Have the first electrode wiring 110a and the second electrode wiring 106a on second substrate 116 corresponding to non-display area II, in order to first substrate 100 on different metal line 118 electrically connect.In one embodiment, the first electrode wiring 110a and the second electrode wiring 106a can pass through metal lotion (metal paste) 120 and metal line 118 electric connections.In another embodiment, the first electrode wiring 110a and the second electrode wiring 106a can utilize anisotropic conductive film (anisotropic conductive film ACF) electrically connects with metal line 118.

Liquid crystal layer 104 is arranged between first substrate 100 and second substrate 116.In the present embodiment, but except the light source L1 of environment for use light as reflective LCD device 200, light-emitting device can be arranged at the 3rd substrate 116 and liquid crystal layer 104 between, in order to the pixel electrode of another light source L2 to reflective LCD device 200 (that is reflecting electrode) 80 to be provided.Light-emitting device comprises: a plurality of first electrodes 110, second electrode 106, and organic luminous layer 108.First electrode 110 is arranged between black matrix" 112 and the liquid crystal layer 104, and corresponding to each pixel cell 102a of pixel unit array 102.In the present embodiment, first electrode 110 can be used as the anode of light-emitting device, and it is electrically connected to the first electrode wiring 110a.First electrode 110 and the first electrode wiring 110a can be formed by same conductive layer definition, and it comprises: and indium tin oxide or indium-zinc oxide (indium zinc oxide, IZO).In one embodiment, the reflectivity of first electrode 110 is greater than 70%, and its material can comprise: aluminium, silver, chromium, titanium, molybdenum, its alloy or its combination.In addition, can utilize first electrode 110 as black matrix".

Second electrode 106 can be used as the negative electrode of light-emitting device, and it is arranged between first electrode 110 and the liquid crystal layer 104, and is electrically connected to the second electrode wiring 106a.Similarly, second electrode 106 and the second electrode wiring 106a can be formed by same conductive layer definition, and it comprises: indium tin oxide or indium-zinc oxide.In addition, specifically second electrode 106 of light-emitting device can be simultaneously as the public electrode (common electrode) of controlling liquid crystal layer 104.

Organic luminous layer 108 is arranged between first electrode 110 and second electrode 106.In other embodiments, can replace single organic luminous layer 108 corresponding to a plurality of organic light emission patterned layer (not illustrating) of each first electrode 110.

Insulation course 105 is arranged between second electrode 106 and the liquid crystal layer 104, in order to as the protective seam of light-emitting device and/or the alignment film of reflective LCD device 200.Insulation course 105 can comprise: and silicon nitride, silicon oxynitride, pi (polyimide, PI) or its combination.

In addition, blooming 117, for example, polaroid (polarizer), anti-reflective film (anti-reflection film), the anti-light film (anti-glare film) of dazzling, optionally be attached on the surface of second substrate 116, and corresponding to viewing area I and towards the side of watching of reflective LCD device 200.

According to the foregoing description,, therefore can reduce the power consumption and the weight of display compared to known use front optical module owing to adopt the light source of organic light emitting apparatus as reflective LCD device.Moreover, because organic light emitting apparatus is arranged in two substrates of reflective LCD device, and with the electrode of organic light emitting apparatus common electrode as reflective LCD device, therefore front optical module is arranged at two substrates outsides of reflective LCD device in the known technology and can reduces the thickness of display integral body effectively, reduce manufacturing cost simultaneously.

Fig. 3 shows image display system block schematic diagram according to another embodiment of the present invention, it may be implemented in flat-panel screens (flat panel display, FPD) 300 or electronic installation 500, for example mobile computer, mobile phone, digital camera, PDA(Personal Digital Assistant), desktop PC, televisor, automobile-used display or portable DVD player.Reflective LCD device 200 according to the present invention can be arranged at flat-panel screens 300, and flat-panel screens 300 can be LCD.In other embodiments, reflective LCD device 200 can be arranged at electronic installation 500.As shown in Figure 3, electronic installation 500 comprises: flat-panel screens 300 and input block 400.Input block 400 is coupled to flat-panel screens 300, in order to provide input signal (for example, signal of video signal) to flat-panel screens 300, makes flat-panel screens 300 show images.

Though the present invention discloses as above with preferred embodiment; right its is not in order to limit the present invention; technical field those of ordinary skill under any; without departing from the spirit and scope of the present invention; when can doing to change and retouching, so protection scope of the present invention is when looking being as the criterion that accompanying Claim defines.

Claims

1. image display system comprises:

Reflective LCD device comprises:

First substrate has pixel unit array;

Second substrate is arranged at this first substrate top;

Liquid crystal layer is arranged between this first substrate and this second substrate;

A plurality of first electrodes are arranged between this second substrate and this liquid crystal layer and corresponding to each pixel cell of this pixel unit array, wherein this pixel cell comprises reflecting electrode;

Second electrode is arranged between described first electrode and this liquid crystal layer, with the public electrode as this liquid crystal layer of control; And

Organic luminous layer is arranged between described first electrode and this second electrode;

Wherein said first electrode, this second electrode, and this organic luminous layer constitute light-emitting device, to provide light source to this reflecting electrode.

2. image display system as claimed in claim 1, the reflectivity of wherein said first electrode are greater than 70%, and this first electrode comprises indium tin oxide or indium-zinc oxide.

3. image display system as claimed in claim 2, wherein this second substrate has black matrix" between described first electrode and this second substrate, and the reflectivity on this black matrix" surface adjacent with this second substrate is less than 20%.

4. image display system as claimed in claim 1, wherein this first electrode comprises: aluminium, silver, chromium, titanium, molybdenum, its alloy or its combination.

5. image display system as claimed in claim 1, wherein this second electrode comprises indium tin oxide or indium-zinc oxide.

6. image display system as claimed in claim 1, wherein this reflective LCD device also comprises insulation course, is arranged between this second electrode and this liquid crystal layer, wherein this insulation course comprises silicon nitride or silicon oxynitride.

7. image display system as claimed in claim 1, wherein this reflective LCD device also comprises insulation course, be arranged between this second electrode and this liquid crystal layer, wherein this insulation course comprises pi, with the alignment film as this reflective LCD device.

8. image display system as claimed in claim 1, wherein this second substrate has first electrode wiring and second electrode wiring, and the flexible printed wiring board that this first substrate has a plurality of metal lines and electrically connects described metal line, this first electrode wiring and this second electrode wiring are electrically connected to different described metal lines respectively by metal lotion or anisotropic conductive film.

9. image display system as claimed in claim 1 also comprises:

Flat-panel screens comprises this reflective LCD device; And

Input block is coupled to this flat-panel screens, in order to provide input signal to this flat-panel screens, makes this two-d display panel show image.

10. image display system as claimed in claim 9, wherein this system comprises the electronic installation with this flat-panel screens, and wherein this electronic installation comprises mobile computer, mobile phone, digital camera, personal digital assistant, desktop PC, televisor, automobile-used display or portable DVD player.