CN100498477C - Liquid crystal display device with a light guide plate - Google Patents
Liquid crystal display device with a light guide plate Download PDFInfo
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- CN100498477C CN100498477C CNB2007101626243A CN200710162624A CN100498477C CN 100498477 C CN100498477 C CN 100498477C CN B2007101626243 A CNB2007101626243 A CN B2007101626243A CN 200710162624 A CN200710162624 A CN 200710162624A CN 100498477 C CN100498477 C CN 100498477C
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Abstract
The invention relates to a liquid crystal display, which comprises a color filter substrate, a plurality of color filter patterns and a double-layer electrode structure, wherein the color filter patterns are arranged on the color filter substrate; the double-layer electrode structure comprises a first electrode layer and a second electrode layer; the material of the first electrode layer is indium tin oxide, zinc aluminum oxide or gallium zinc oxide, the material of the second electrode layer is indium tin oxide, zinc aluminum oxide or gallium zinc oxide, and the material of the first electrode layer is different from that of the second electrode layer. The liquid crystal display of the invention utilizes a double-layer electrode structure or a single-layer electrode structure using zinc-aluminum oxide, and has the advantages of improving color cast, improving blue light penetration rate, increasing color temperature and color gamut, and the like.
Description
Technical field
The invention relates to a kind of LCD, refer to a kind of LCD of improving colour cast especially.
Background technology
LCD is owing to have that external form is frivolous, power consumption is few and characteristic such as radiationless pollution, so be widely used in notebook computer (notebook), personal computer monitor and personal digital assistant (personal digital assistant, PDA) etc. on the information product, and replace the conventional cathode ray tube TV gradually, become the main flow of domestic TV commodity.
Because the no autonomous characteristics of luminescence of LCD itself, therefore must utilize light source that backlight module provides with display frame, and backlight module mainly is to use cold cathode fluorescent lamp pipe or light emitting diode to produce white light at present, relends by the colored filter on the display panels to demonstrate colour picture.No matter yet be cold cathode fluorescent lamp pipe or light emitting diode, the white light source that it produced has its restriction in the sky earlier, has therefore influenced the color representation of LCD.
Please refer to Fig. 1.Fig. 1 has illustrated the spectrum of existing cold cathode fluorescent lamp pipe light source and the light-filtering characteristic of colored filter.As shown in Figure 1, the intensity of cold cathode fluorescent lamp pipe light source and the relation such as the curve C of wavelength present, and the penetrance of Red lightscreening plate, green color filter and blue color filter and the relation of wavelength are then respectively shown in curve R, curve G and curve B.By among the figure as can be known, a little less than this intensity in blue light and red light wavelength scope of cold cathode fluorescent lamp pipe light source compared to the intensity in the green wavelength is, and this characteristic make LCD have colour gamut inadequately broadness, the problem of minor peaks (sub-peak) and ruddiness problem such as perform poor appears easily.
Please refer to Fig. 2.Fig. 2 has illustrated the spectrum of existing LED source and the light-filtering characteristic of colored filter.As shown in Figure 2, the intensity of LED source presents with the relation of wavelength such as curve L, and the penetrance of Red lightscreening plate, green color filter and blue color filter and the relation of wavelength are then respectively shown in curve R, curve G and curve B.By among the figure as can be known, the blue light crest location that LED source provided drops in the wavelength coverage of 450nm to 480nm approximately, yet desirable blue light crest location should be in the wavelength coverage of about 420nm to 450nm, add human eye for the susceptibility of light color be green glow greater than ruddiness greater than blue light, therefore use light emitting diode can produce the colour cast problem as light source.
Summary of the invention
Fundamental purpose of the present invention is to provide a kind of LCD, to promote the color representation of LCD.
For reaching above-mentioned purpose, the invention provides a kind of LCD.Above-mentioned LCD comprises that array basal plate, a colored filter substrate, a plurality of color filter patterns are arranged on the described colored filter substrate, the pair of lamina electrode structure is arranged on described these color filter patterns, and a liquid crystal layer is between described array base palte and described colored filter substrate.Described two-layer electrode structure comprises that one first electrode layer is arranged at the surface of described these color filter patterns, and a second electrode lay is arranged at the surface of described first electrode layer.The material of described first electrode layer is indium tin oxide, Zinc-aluminium or gallium zinc oxide, and the material of described the second electrode lay is indium tin oxide, Zinc-aluminium or gallium zinc oxide, and described first electrode layer is different with the material of described the second electrode lay.
For reaching above-mentioned purpose, the present invention provides a kind of LCD in addition.Above-mentioned LCD comprises that array basal plate, a colored filter substrate, a plurality of color filter patterns are arranged on the described colored filter substrate, a liquid crystal layer is between described array base palte and described colored filter substrate, and one electrode structure be arranged on described these color filter patterns, the material of wherein said electrode structure comprises Zinc-aluminium.
LCD of the present invention is utilized the two-layer electrode structure or is used the practice of the single-layer electrodes structure of Zinc-aluminium, has the colour cast of improvement, promotes the blue light penetrance, increases advantages such as colour temperature and colour gamut.
Description of drawings
Fig. 1 has illustrated the spectrum of existing cold cathode fluorescent lamp pipe light source and the light-filtering characteristic of colored filter.
Fig. 2 has illustrated the spectrum of existing LED source and the light-filtering characteristic of colored filter.
Fig. 3 is the synoptic diagram of the LCD of a preferred embodiment of the present invention.
Fig. 4 has illustrated the penetrance of electrode material and the graph of a relation of wavelength.
Fig. 5 has shown the color simulation result of different electrode materials.
Fig. 6 is the synoptic diagram of the LCD of another preferred embodiment of the present invention.
Drawing reference numeral
1 LCD, 2 backlight modules
10 array base paltes, 12 liquid crystal layers
20 colored filter substrates, 22 color filter patterns
22R Red lightscreening plate 22G green color filter
22B blue color filter 24 black matrix patterns
26 two-layer electrode structures, 28 first electrode layers
30 the second electrode lays, 32 both alignment layers
50 LCD, 52 backlight modules
60 array base paltes, 62 liquid crystal layers
70 colored filter substrates, 72 color filter patterns
72R Red lightscreening plate 72G green color filter
72B blue color filter 74 black matrix patterns
76 electrode structures
Embodiment
Please refer to Fig. 3.Fig. 3 is the synoptic diagram of the LCD of a preferred embodiment of the present invention.As shown in Figure 3, the LCD 1 of present embodiment, be arranged on the backlight module 2, wherein backlight module 2 is in order to provide LCD 1 required light source, it can be the fluorescent lamp backlight module, for example cold cathode fluorescent lamp pipe backlight module, light-emitting diode (LED) backlight module, the backlight module of for example white light-emitting diode backlight module, or other kind.LCD 1 comprises that array basal plate 10, a colored filter substrate 20, a plurality of color filter patterns 22 are arranged at (comprising for example Red lightscreening plate 22R, green color filter 22G and blue color filter 22B) on the inside surface of colored filter substrate 20, a plurality of black matrix pattern 24 is arranged on the colored filter substrate 20 between the color filter patterns 22, pair of lamina electrode structure 26, be arranged on the color filter patterns 22, and a liquid crystal layer 12, between array base palte 10 and colored filter substrate 20.Two-layer electrode structure 26 comprises one first electrode layer 28, for example be arranged at color filter patterns 22 the surface or on, an and the second electrode lay 30 is arranged at the surface of first electrode layer 28.In another example, color filter patterns 22 the surface or on a flatness layer (not illustrating) can be set earlier, first electrode layer 28 is set on flatness layer then again, that is to say, be folded with flatness layer between the color filter patterns 22 and first electrode layer 28.In addition, be provided with a both alignment layers 32 on the second electrode lay 30 in addition.The material of first electrode layer 28 is to use transparent conductive material, it comprises indium tin oxide (ITO), Zinc-aluminium (ZAO) or gallium zinc oxide (GZO), and the material of the second electrode lay 30 is a transparent conductive material, it comprises indium tin oxide, Zinc-aluminium or gallium zinc oxide, but first electrode layer 28 uses different materials and forms the pair of lamina structure with the second electrode lay 30.In present embodiment, the material of first electrode layer 28 is to select Zinc-aluminium for use, the material of the second electrode lay 30 then is to select indium tin oxide for use, but be not limited thereto, under the prerequisite of using different materials, the material of first electrode layer 28 also can be indium tin oxide or gallium zinc oxide, and the material of the second electrode lay 30 also can be Zinc-aluminium or gallium zinc oxide.In the present embodiment, the thickness of first electrode layer 28 and the second electrode lay 30 is respectively between about
Extremely
And with between
Extremely
For preferable, for example the thickness of first electrode layer 28 and the second electrode lay 30 is about respectively
In addition, the thickness of first electrode layer 28 and the second electrode lay 30 is approximately identical in the present embodiment, but is not limited thereto and can makes appropriateness and adjust.
Please refer to Fig. 4.Fig. 4 has illustrated the penetrance of electrode material and the graph of a relation of wavelength.In Fig. 4, illustrated the graph of a relation of five groups of electrode materials and penetrance, be respectively:
First group:
Material: Zinc-aluminium monofilm; Thickness:
Second group:
Material: Zinc-aluminium/indium tin oxide duplicature; Thickness:
The 3rd group:
Material: Zinc-aluminium/indium tin oxide duplicature; Thickness:
The 4th group:
Material: indium tin oxide monofilm; Thickness:
The 5th group:
Material: indium tin oxide monofilm; Thickness:
As shown in Figure 4, second group (material: Zinc-aluminium/indium tin oxide duplicature; Thickness:
) electrode material and the 5th group of (material: indium tin oxide monofilm; Thickness:
) penetrance of electrode material in the blue light wavelength scope (between 85%-90%) obviously on the low side, and first group of (material: Zinc-aluminium monofilm; Thickness:
) electrode material and the 4th group of (material: indium tin oxide monofilm; Thickness:
) penetrance of electrode material in the blue light wavelength scope be higher, but its blue light crest location drops in the wavelength coverage of 515nm to 530nm approximately, but not drop in the desirable blue light wavelength scope 420nm to 450nm, therefore can't promote the intensity of blue light.Compared to first group and the 4th group of electrode material, the 3rd group (material: Zinc-aluminium/indium tin oxide duplicature, thickness is respectively
) the blue light crest location of electrode material is transferred between about 450nm to 480nm, and the penetrance in desirable blue light wavelength scope (approximately between 420nm to 450nm) also has significant lifting (approximately between 97%-99%), therefore the penetrance in the part green wavelength can be passed in the blue light wavelength scope, and help to increase the brightness of blue light and can promote the overall color performance of LCD.
Refer again to Fig. 5.Fig. 5 has shown the color simulation result of different electrode materials, comprising a control group and an experimental group, is respectively:
Control group:
Material: indium tin oxide monofilm; Thickness:
Experimental group:
Material: Zinc-aluminium/indium tin oxide duplicature; Thickness:
As shown in Figure 5, use the analog result of light emitting diode, experimental group (material: Zinc-aluminium/indium tin oxide duplicature as light source; Thickness:
) blue light y color coordinate significantly reduce (dropping to 0.123) by 0.129, and use the analog result of cold cathode fluorescent lamp pipe as light source, the blue light y color coordinate of experimental group also significantly reduces (dropping to 0.130 by 0.136).In addition, use the analog result of light emitting diode as light source, the colour temperature of experimental group also increases to 7063K by 6582K, and uses the analog result of cold cathode fluorescent lamp pipe as light source, and the colour temperature of experimental group also rises to 7327K by 6812K.By above-mentioned analog result as can be known, use Zinc-aluminium/indium tin oxide two-layer electrode material that colour temperature is raise, and blue light colourity is increased, and can promote the overall color performance of LCD, and can not have influence on green glow colourity.What deserves to be explained is in addition, if the specification of LCD itself does not need higher blue light colourity, then can offset by the thickness of reduction blue color filter, under identical color representation, can further increase the penetrance and the brightness performance of LCD thus by the blue light brightness that electrode material increased.
Please refer to Fig. 6.Fig. 6 is the synoptic diagram of the LCD of another preferred embodiment of the present invention.As shown in Figure 6, the LCD 50 of present embodiment is arranged on the backlight module 52, and wherein backlight module 52 is in order to provide LCD 50 required light source, it can be fluorescent lamp backlight module, light-emitting diode (LED) backlight module, or the backlight module of other kind.LCD 50 comprises that inside surface, a plurality of black matrix pattern 74 that array basal plate 60, a colored filter substrate 70, a plurality of color filter patterns 72 are arranged at (comprising for example Red lightscreening plate 72R, green color filter 72G and blue color filter 72B) colored filter substrate 70 are arranged on the colored filter substrate 70 between the color filter patterns 72, an electrode structure 76, be arranged on the color filter patterns 72, one both alignment layers 78 is arranged on the electrode structure 76, and a liquid crystal layer 62 is between array base palte 60 and colored filter substrate 70.Be different from the previous embodiment part and be, the electrode structure 76 of present embodiment is a single layer structure, and its material comprises Zinc-aluminium, and thickness then is
Use Zinc-aluminium as the practice of electrode structure 76, also have the advantage that increases the blue light penetrance, and can promote the color representation of LCD compared to existing use individual layer indium-tin oxide electrode structure.
In sum, LCD of the present invention is utilized the two-layer electrode structure or is used the practice of the single-layer electrodes structure of Zinc-aluminium, can improve the colour cast problem, and has the blue light of lifting penetrance, and increases advantages such as colour temperature and colour gamut.
The above only is preferred embodiment of the present invention, and all equalizations of being done according to claim scope of the present invention change and modify, and all should belong to covering scope of the present invention.
Claims (10)
1. a LCD is characterized in that, described LCD comprises:
Array basal plate;
One colored filter substrate;
A plurality of color filter patterns are arranged on the described colored filter substrate; And
The pair of lamina electrode structure is arranged on described these color filter patterns, and described two-layer electrode structure comprises:
One first electrode layer is arranged at the surface of described these color filter patterns, and the material of described first electrode layer is indium tin oxide, Zinc-aluminium or gallium zinc oxide; And
One the second electrode lay is arranged at the surface of described first electrode layer, and the material of described the second electrode lay is indium tin oxide, Zinc-aluminium or gallium zinc oxide, and described first electrode layer is different with the material of described the second electrode lay; And
One liquid crystal layer is between described array base palte and described colored filter substrate.
2. LCD as claimed in claim 1, the material of wherein said first electrode layer are Zinc-aluminium or gallium zinc oxide, and the material of described the second electrode lay is an indium tin oxide.
3. LCD as claimed in claim 1, wherein said LCD includes a backlight module in addition, is arranged at the below of described array base palte.
4. LCD as claimed in claim 3, wherein said backlight module are a fluorescent lamp backlight module.
5. LCD as claimed in claim 3, wherein said backlight module are a light-emitting diode (LED) backlight module.
6. LCD as claimed in claim 5, wherein said light-emitting diode (LED) backlight module are a white light-emitting diode backlight module.
7. LCD as claimed in claim 1, the thickness of wherein said first electrode layer and described the second electrode lay is
Extremely
8. LCD as claimed in claim 1, the thickness of wherein said first electrode layer and described the second electrode lay is
Extremely
9. LCD as claimed in claim 1, the thickness of wherein said first electrode layer and described the second electrode lay is identical.
10. LCD as claimed in claim 9, the thickness of wherein said first electrode layer and described the second electrode lay is
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2007101626243A CN100498477C (en) | 2007-10-15 | 2007-10-15 | Liquid crystal display device with a light guide plate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101626243A CN100498477C (en) | 2007-10-15 | 2007-10-15 | Liquid crystal display device with a light guide plate |
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| CN101140392A CN101140392A (en) | 2008-03-12 |
| CN100498477C true CN100498477C (en) | 2009-06-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102142496A (en) * | 2011-02-28 | 2011-08-03 | 杭州士兰明芯科技有限公司 | Double-layer transparent electrode on P type GaN (gallium nitride) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101200772B1 (en) * | 2009-10-16 | 2012-11-13 | 삼성코닝정밀소재 주식회사 | Optical filter for display device and display device having the same |
| CN102654594B (en) * | 2012-03-16 | 2015-02-25 | 京东方科技集团股份有限公司 | Half-transmitting and half-reflecting type color filter and manufacturing method thereof |
| CN106896580B (en) * | 2017-04-27 | 2020-04-14 | 京东方科技集团股份有限公司 | Lighting device and car light device |
| CN112241080A (en) * | 2019-07-17 | 2021-01-19 | 上海仪电显示材料有限公司 | Filter substrate and forming method thereof, liquid crystal display and forming method thereof |
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| JP2002207214A (en) * | 2000-11-08 | 2002-07-26 | Nec Corp | Reflection plate, reflective liquid crystal display device and method for manufacturing the same |
| CN1549006A (en) * | 2003-05-21 | 2004-11-24 | 统宝光电股份有限公司 | Reflective liquid crystal display with double matrix electrodes |
| CN1629682A (en) * | 2003-12-19 | 2005-06-22 | 鸿富锦精密工业（深圳）有限公司 | Fringing electric field switch type liquid crystal display device |
| US20060114397A1 (en) * | 2004-11-30 | 2006-06-01 | Casio Computer Co., Ltd. | Vertical-alignment liquid crystal display device |
| US20060290861A1 (en) * | 1997-10-01 | 2006-12-28 | Sanyo Electric Co., Ltd | Vertically aligned liquid crystal display |
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2007
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Patent Citations (5)
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|---|---|---|---|---|
| US20060290861A1 (en) * | 1997-10-01 | 2006-12-28 | Sanyo Electric Co., Ltd | Vertically aligned liquid crystal display |
| JP2002207214A (en) * | 2000-11-08 | 2002-07-26 | Nec Corp | Reflection plate, reflective liquid crystal display device and method for manufacturing the same |
| CN1549006A (en) * | 2003-05-21 | 2004-11-24 | 统宝光电股份有限公司 | Reflective liquid crystal display with double matrix electrodes |
| CN1629682A (en) * | 2003-12-19 | 2005-06-22 | 鸿富锦精密工业（深圳）有限公司 | Fringing electric field switch type liquid crystal display device |
| US20060114397A1 (en) * | 2004-11-30 | 2006-06-01 | Casio Computer Co., Ltd. | Vertical-alignment liquid crystal display device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102142496A (en) * | 2011-02-28 | 2011-08-03 | 杭州士兰明芯科技有限公司 | Double-layer transparent electrode on P type GaN (gallium nitride) |
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| CN101140392A (en) | 2008-03-12 |
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