CN102062970A - Colour filter plate - Google Patents

Colour filter plate Download PDF

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Publication number
CN102062970A
CN102062970A CN 201010604875 CN201010604875A CN102062970A CN 102062970 A CN102062970 A CN 102062970A CN 201010604875 CN201010604875 CN 201010604875 CN 201010604875 A CN201010604875 A CN 201010604875A CN 102062970 A CN102062970 A CN 102062970A
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CN
China
Prior art keywords
projection
color filter
pigment
filter according
color
Prior art date
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Pending
Application number
CN 201010604875
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Chinese (zh)
Inventor
郭义鹏
谢文仁
庄英鸿
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CPT Display Technology Fujian Ltd
Fujian Huaying Display Technology Co Ltd
Chunghwa Picture Tubes Ltd
Original Assignee
Fujian Huaying Display Technology Co Ltd
Chunghwa Picture Tubes Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Fujian Huaying Display Technology Co Ltd, Chunghwa Picture Tubes Ltd filed Critical Fujian Huaying Display Technology Co Ltd
Priority to CN 201010604875 priority Critical patent/CN102062970A/en
Publication of CN102062970A publication Critical patent/CN102062970A/en
Pending legal-status Critical Current

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  • Optical Filters (AREA)

Abstract

The present invention relates to a colour filter plate, comprising a transparent base plate, a transparent conductive layer, a plurality of filter layer and a plurality of lugs. The filter layers are disposed between the transparent base plate and the transparent conductive layer, and the lugs are disposed on a plane of the transparent conductive layer. The film resistance of each lug is more than 1014 ohm; the optical density of each lug is more than 1.5; the colour filter plate of the present invention enables the contrast of a liquid crystal display to be improved.

Description

Color filter
Technical field
The invention relates to a kind of LCD (Liquid Crystal Display, LCD), and particularly relevant for a kind of color filter (color filter plate).
Background technology
LCD is the main flow commodity on the present monitor market, and color filter is common assembly in the LCD.Color filter can filter from backlight (backlight source) and the light that comes, and allows the light penetration with specific wavelength, for example general color filter can allow ruddiness, blue light and green glow penetrate.So, LCD is able to the display color image.
The type of LCD has multiple, and the vertical orientation type (Vertically Alignment, VA) LCD is one type a LCD wherein.In present vertical alignment type liquid crystal display device, a kind of color filter with a plurality of black projections (bump) has appearred.These black projections (block bump) can reduce dark attitude briliancy (brightness in dark state), thus the contrast (contract) that can improve LCD.
Make normally carbon granule (carbon particle) of main material that these black projections are presented black, and the carbon granule quantity that the black projection is contained is many more, the color relation of black projection is partial to black more, can improve the contrast of LCD more.In addition, carbon granule has resistance on the low side, and therefore when the black projection contained many more carbon granules, it is low more that the sheet resistance of black projection (sheet resistance) also can become.
Summary of the invention
The invention provides a kind of color filter, can impel the contrast of LCD to improve.
The present invention proposes a kind of color filter, it is characterized in that: comprise a transparency carrier, a transparency conducting layer, a plurality of filter layer and a plurality of projection.These filter layers are configured between transparency carrier and the transparency conducting layer, and these projections are configured on the plane of transparency conducting layer.The sheet resistance of each projection is 10 14More than Ω/, and the optical density (OD) of each projection (Optical Density is OD) more than 1.5.
In an embodiment of the present invention, above-mentioned color filter more comprises a black matrix layer (black matrix layer), and black matrix layer is configured between transparency carrier and the transparency conducting layer.
In an embodiment of the present invention, the sheet resistance of each projection is between 10 14Ω/ to 10 17Between Ω/.
In an embodiment of the present invention, the dielectric coefficient of each projection is below 4.
In an embodiment of the present invention, the optical density (OD) of each projection is more than 4.
In an embodiment of the present invention, the optical density (OD) of each projection is between 1.5 to 4.
In an embodiment of the present invention, each projection is to be mixed by a photoresist and multiple pigment.
In an embodiment of the present invention, in same projection, the percentage by weight that these pigment account for this projection is below 25%.
In an embodiment of the present invention, these pigment comprise a blue lake and a darkviolet pigment.
In an embodiment of the present invention, the ratio of above-mentioned darkviolet pigment and this two weight item of blue lake is between 1.85 to 5.67.
In an embodiment of the present invention, the coordinate of the color of above-mentioned blue lake in CIE (International Commission on Illumination, International Commission on Illumination) xy chromatic diagram be (
Figure 2010106048754100002DEST_PATH_IMAGE001
,
Figure 10774DEST_PATH_IMAGE002
), and 0.09 ≦ ≦ 0.22,0.05 ≦
Figure 386446DEST_PATH_IMAGE002
≦ 0.15.
In an embodiment of the present invention, the coordinate of the color of above-mentioned darkviolet pigment in CIE xy chromatic diagram be (
Figure 2010106048754100002DEST_PATH_IMAGE003
,
Figure 278310DEST_PATH_IMAGE004
), and 0.26 ≦
Figure 212506DEST_PATH_IMAGE003
≦ 0.45,0.08 ≦
Figure 859519DEST_PATH_IMAGE004
≦ 0.18.
Because the included projection of color filter of the present invention, its optical density (OD) is more than 1.5, thereby can impel the contrast of LCD to improve.
Description of drawings
Fig. 1 is the diagrammatic cross-section of the color filter of one embodiment of the invention.
Among the figure: 100-color filter; 110-transparency carrier; 120-transparency conducting layer; 122-plane; 130b, 130g, 130r-filter layer; 140-black matrix layer; 142-grid; 150-projection.
Embodiment
For above-mentioned feature and advantage of the present invention can be become apparent, embodiment cited below particularly, and conjunction with figs. are described in detail below.
Fig. 1 is the diagrammatic cross-section of the color filter of one embodiment of the invention.See also Fig. 1, color filter 100 can be applicable to LCD, for example vertical alignment type liquid crystal display device.Color filter 100 comprises a transparency carrier 110, a transparency conducting layer 120 and a plurality of filter layer 130r, 130g, 130b, and wherein filter layer 130r, 130g and 130b all are configured between transparency carrier 110 and the transparency conducting layer 120.Transparency carrier 110 for example is a glass plate, and the material that constitutes transparency conducting layer 120 can be the transparent material with electric conductivity, its for example be indium tin oxide (Indium Tin Oxide, ITO) or indium-zinc oxide (Indium Zinc Oxide, IZO).
Filter layer 130r, 130g and 130b three can filter from the next light of backlight, and allow light penetration with specific wavelength, for example filter layer 130r can allow ruddiness penetrate, filter layer 130g can allow green glow penetrate, and filter layer 130b can allow blue light penetrate, so the color that filter layer 130r, 130g and 130b three are presented can be respectively red, green and blue.In addition, formation filter layer 130r, 130g and 130b three's material can be the photoresist of dyeing.
In addition, color filter 100 can more comprise a black matrix layer 140, and black matrix layer 140 is configured between transparency carrier 110 and the transparency conducting layer 120.Be shaped as netted (net) that deceives matrix layer 140, so black matrix layer 140 has a plurality of grids (lattice) 142, and these filter layers 130r, 130g and 130b are configured in respectively in these grids 142.
Hold above-mentioned, black matrix layer 140 energy masking film transistor array substrate (Thin-Film Transistor Array Substrate, TFT Array Substrate, do not illustrate) on many distributions and a plurality of thin film transistor (TFT), to avoid influencing the image quality of LCD, wherein these distributions for example are sweep trace (scan line) and data line (data line).
Color filter 100 more comprises a plurality of projections 150, and transparency conducting layer 120 has a plane 122, and wherein these projections 150 all are configured on the plane 122.The optical density (OD) of each projection 150 (is comprising 1.5) more than 1.5, for example the optical density (OD) of each projection 150 can be between 1.5 to 4, or (comprising 4) more than 4, so in appearance, the color that projection 150 is presented can be grey or black, and the contrast that these projections 150 can improve LCD.
When the optical density (OD) of projection 150 between 1.5 to 4, for example the optical density (OD) of projection 150 is 3 o'clock, the color that projection 150 is presented can be a grey.When the optical density (OD) of projection 150 4 when above, the color that projection 150 is presented can be a black.In addition, in the present embodiment, the optical density (OD) of these projections 150 in fact all can be mutually the same.In other words, these projections 150 in same color filter 100 can present identical grey or black.
Aspect electrical, the sheet resistance of each projection 150 is 10 14Ω/ is above (to comprise 10 14Ω/), for example the sheet resistance of each projection 150 can be between 10 14Ω/ to 10 17Between Ω/, or between 10 15Ω to 10 17Between Ω/, so projection 150 has good electric insulating quality.In addition, the dielectric coefficient of each projection 150 can be (to comprise 4) below 4, and for example the dielectric coefficient of each projection 150 is between 2 to 4, and in preferred embodiment, the dielectric coefficient of each projection 150 is between 2.5 to 3.5, so projection 150 has more dielectric coefficient on the low side.
The method of formation projection 150 has multiple, and in the present embodiment, each projection 150 can be to be mixed by photoresist and multiple pigment, and wherein these pigment can comprise a blue lake and a darkviolet pigment.The two does not all contain the low-resistance particles of this class such as carbon granule basically blue lake and darkviolet pigment.Compared to the known black projection that contains carbon granule, these projections 150 have higher sheet resistance.(
Figure 747840DEST_PATH_IMAGE001
,
Figure 4247DEST_PATH_IMAGE002
), and 0.09 ≦
Figure 294414DEST_PATH_IMAGE001
≦ 0.22,0.05 ≦ ≦ 0.15
The coordinate of the color of blue lake in CIE xy chromatic diagram be (
Figure 924165DEST_PATH_IMAGE001
,
Figure 282465DEST_PATH_IMAGE002
), and the coordinate of the color of darkviolet pigment in CIE xy chromatic diagram be (
Figure 191253DEST_PATH_IMAGE003
,
Figure 242385DEST_PATH_IMAGE004
), wherein 0.09 ≦
Figure 105299DEST_PATH_IMAGE001
≦ 0.22,0.05 ≦
Figure 267290DEST_PATH_IMAGE002
≦ 0.15,0.26 ≦
Figure 765005DEST_PATH_IMAGE003
≦ 0.45,0.08 ≦
Figure 987039DEST_PATH_IMAGE004
≦ 0.18, and CIE xy chromatic diagram can be CIE 1931 chromatic diagrams, CIE 1960 chromatic diagrams or CIE 1976 chromatic diagrams.In addition, except blue lake and darkviolet pigment, projection 150 also can be used carmetta (magenta) pigment instead, cyan (cyan) pigment mixes with yellow (yellow) pigment three, is the pigment that adopts which kind of color so the present invention does not limit projection 150.
In same projection 150, the percentage by weight that these pigment account for projection 150 can (comprise 25%) below 25%.Blue lake accounts for the percentage by weight of all pigment can be between 15% to 35%, and darkviolet pigment account for the percentage by weight of all pigment can be between 65% to 85%, so the ratio of darkviolet pigment and the two weight item of blue lake is between 1.85 to 5.67.
In sum, for background technology, the included projection of color filter of the present invention has higher sheet resistance and in the optical density (OD) more than 1.5, so these projections can not only impel the contrast of LCD to improve, and can reduce the interference to Liquid Crystal Molecules Alignment.So, the present invention can reduce the probability that light leak (light leakage) takes place.
Though the present invention discloses as above with previous embodiment, so it is not in order to limiting the present invention, anyly has the knack of alike skill person, and without departing from the spirit and scope of the invention, institute does to change the equivalent replacement with retouching, still is in the scope of patent protection of the present invention.

Claims (10)

1. color filter is characterized in that: comprising:
One transparency carrier;
One transparency conducting layer has a plane;
A plurality of filter layers are configured between this transparency carrier and this transparency conducting layer; And
A plurality of projections are configured on this plane, wherein respectively the sheet resistance of this projection 10 14More than Ω/, and respectively the optical density (OD) of this projection more than 1.5.
2. color filter according to claim 1 is characterized in that: more comprise a black matrix layer, and should black matrix layer be configured between this transparency carrier and this transparency conducting layer.
3. color filter according to claim 1 is characterized in that: the sheet resistance of described projection is between 10 14Ω/ to 10 17Between Ω/.
4. color filter according to claim 1 is characterized in that: the dielectric coefficient of described projection is below 4.
5. color filter according to claim 1 is characterized in that: the optical density (OD) of described projection is more than or equal to 1.5.
6. color filter according to claim 1 is characterized in that: described projection is to be mixed by a photoresist and multiple pigment.
7. color filter according to claim 6 is characterized in that: in same projection, the percentage by weight that those pigment account for this projection is below 25%.
8. color filter according to claim 6 is characterized in that: described pigment comprises a blue lake and a darkviolet pigment.
9. color filter according to claim 8 is characterized in that: the ratio of described darkviolet pigment and this two weight item of blue lake is between 1.85 to 5.67.
10. color filter according to claim 8 is characterized in that: the coordinate of the color of described blue lake in CIE xy chromatic diagram for (
Figure 2010106048754100001DEST_PATH_IMAGE002
,
Figure 2010106048754100001DEST_PATH_IMAGE004
), and 0.09 ≦ ≦ 0.22,0.05 ≦
Figure 8513DEST_PATH_IMAGE004
≦ 0.15; The coordinate of the color of described darkviolet pigment in CIE xy chromatic diagram be (
Figure 2010106048754100001DEST_PATH_IMAGE006
,
Figure 2010106048754100001DEST_PATH_IMAGE008
), and 0.26 ≦
Figure 439363DEST_PATH_IMAGE006
≦ 0.45,0.08 ≦
Figure 566719DEST_PATH_IMAGE008
≦ 0.18.
CN 201010604875 2010-12-25 2010-12-25 Colour filter plate Pending CN102062970A (en)

Priority Applications (1)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW535025B (en) * 1998-12-03 2003-06-01 Hitachi Ltd Liquid crystal display device
CN1949045A (en) * 2006-11-20 2007-04-18 友达光电股份有限公司 Liquid crystal panel
CN101093356A (en) * 2006-06-22 2007-12-26 东京应化工业株式会社 Photosensitive polymer combination and liquid crystal tropism control cam and forming method thereof
JP2008158158A (en) * 2006-12-22 2008-07-10 Toppan Printing Co Ltd Color filter having protrusion for controlling liquid crystal alignment
JP2009053482A (en) * 2007-08-28 2009-03-12 Toppan Printing Co Ltd Substrate for liquid crystal display device
CN101782702A (en) * 2010-02-04 2010-07-21 上海交通大学 Device for reducing driving voltage of blue phase liquid crystal display

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW535025B (en) * 1998-12-03 2003-06-01 Hitachi Ltd Liquid crystal display device
CN101093356A (en) * 2006-06-22 2007-12-26 东京应化工业株式会社 Photosensitive polymer combination and liquid crystal tropism control cam and forming method thereof
CN1949045A (en) * 2006-11-20 2007-04-18 友达光电股份有限公司 Liquid crystal panel
JP2008158158A (en) * 2006-12-22 2008-07-10 Toppan Printing Co Ltd Color filter having protrusion for controlling liquid crystal alignment
JP2009053482A (en) * 2007-08-28 2009-03-12 Toppan Printing Co Ltd Substrate for liquid crystal display device
CN101782702A (en) * 2010-02-04 2010-07-21 上海交通大学 Device for reducing driving voltage of blue phase liquid crystal display

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Application publication date: 20110518