TW200420964A - Liquid crystal display device - Google Patents

Abstract

The present invention relates to a liquid crystal display device. The liquid crystal display device includes a first substrate, a black matrix, a wall-like body and a second substrate, wherein the first substrate, the black matrix, the wall-like body and the second substrate are successively formed. The wall-like body is positioned on an area where the black matrix is formed.

Description

200420964 V. Description of the invention (1) [Technical field to which the invention belongs] The present invention relates to a liquid crystal display device using a black matrix. [Prior technology] The liquid crystal display device is a passive display device. In order to achieve the effect of color display, it is necessary to provide a color filter. Its function is to provide color for the liquid crystal display device, and cooperate with TFT (Thin Film Transistor, thin film transistor). ) The array and other elements such as liquid crystal display different color images. Please refer to the first figure, which is a schematic diagram of a conventional liquid crystal display device. The liquid crystal display device 20 includes a first base layer 24 and a second k layer 27, and a liquid crystal layer 25 is held therebetween. The second base layer 2 7 has a bottom mask of a TFT array 26. The first base layer 24, the colored layer 22, the black matrix 23, and the IT0 (Indium Tin Oxide, indium oxide, tin) layer 21 together form a color filter (not shown). The black matrix 2 3 is arranged in rows and columns on the first base layer 24 to form a plurality of lattices, and a spacer 2 8 is arranged at the intersection of the rows and the columns. The spacer 2 8 is generally made of a transparent material. It is used to support the first base layer 24 and the second base layer 27. The coloring layer 22 has three coloring units of red (R), blue (B), and green (G), and the three coloring units are repeatedly and regularly arranged on the first base layer 24 to transmit the three primary colors of red, blue, and green, respectively. Block light of other wavelengths from transmitting. The black matrix 23 is disposed between the three coloring units, and its function is to block the light between the three coloring units, prevent light leakage and prevent the coloring material from mixing, and the ITO layer 21 cooperates with the TFT array 26 to control the coloring layer 22 The light of each coloring unit passes through to show different colors. The black matrix 2 3 is generally composed of chromium and its compounds or black resin.

Page 6 200420964 V. Description of the invention (2) ical density (optical density) and light intensity, while the reflectance refers to the black matrix applied to the surface of the black matrix of the liquid crystal display device and the opposite indicator. Backlighting, such as reflection, may cause light interference. The lower the reflectivity, the higher the contrast ratio of the liquid crystal display device, the black matrix of clear black resin material, the black matrix composed of the black 'south °' composed of the road and its compounds, and the color filter of the hand. U.S. Patent No. 6, 28 5, 4 24. The sheet 1 includes a transparent glass substrate 2, an izi bright electrode layer 7, and the color filter. The black matrix 9 includes a first impedance and a light-shielding layer 5 arranged in order in the far-end *. Its optical performance depends on its 0D (0pt reflectance. 0D represents the light reflectance on both sides of the matrix of the black matrix. When \ 'is adjacent to the LCD One surface of one side of the screen will be exposed to external light and the liquid crystal rate is too high, which will cause too much reflected light. The higher the 0D value of the black matrix is, the clearer the liquid crystal display is when the device is not installed, otherwise the display effect is poor. Of course, its OD value is not as high as the matrix 0D value. However, its reflectance is disclosed by chromium and its compound film. It was announced on September 4, 2001. Please read the second picture. The color filter black matrix 9 A protective layer β and a light sheet 1 are also provided with a polarizer 8 on the surface of the reflective film 3, a second antireflection film 4 on the clear glass substrate 2. An antireflection film 3 and the second antireflection film 4 Contains different metal compounds. The light-shielding layer 5 includes metal, molybdenum, tungsten, or nickel, which is different from the metal of the first anti-reflection film 3 and the second anti-reflection film 4, and the first anti-reflection film 3 and the first The thickness of the anti-reflection film 4 is preferably 20 to 60 nm, and the thickness of the light-shielding layer 5 It is preferably 50~150 nm. This patent technology takes advantage of the first anti-reflection film 3, and a second anti-reflection film 4

200420964 V. Description of the invention (3) The principle of interference cancellation of the reflected light on the surface of the light-shielding layer 5 reduces the reflectivity, which can effectively reduce the reflectivity of light entering from the liquid crystal display side and passing through the transparent glass substrate 2. However, due to the color The light-shielding layer 5 of the filter 1 contains a metal such as chromium, which has a high reflectance to light. When the color filter 1 is applied to a liquid crystal display device, the light-shielding layer 5 reflects too much backlight and causes interference, making the The optical performance of the liquid crystal display device is affected. Because of this, improved designs for backlight reflection and contrast of liquid crystal display devices are always necessary. SUMMARY OF THE INVENTION An object of the present invention is to provide a liquid crystal display device with low backlight reflection and high contrast. The liquid crystal display device of the present invention includes a first base layer, a black matrix, a wall, and a second base layer. The first base layer, the black matrix, and the wall layer are sequentially arranged, and the wall is disposed in the area where the black matrix is located. A spacer, the wall, the body, and the second domain. Wherein, the liquid crystal display device further includes a resin material for the spacer. Compared with the prior art, a black matrix is provided on one side of the black matrix in the liquid crystal display device of the present invention, and the wall can block a part of light, so that the black matrix OD value can be increased. Because the wall uses a resin material, the reflected light in a black matrix area using a metal material such as chromium can be reduced, and backlight reflection can be effectively reduced. Therefore, the display contrast of the liquid crystal display device of the present invention is high, and the resin wall system is Remaining during the production of this spacer, without increasing costs and production methods

Page 8 200420964 V. Description of Invention (4). [Embodiment] ^ 1: Refer to the third and fourth figures, respectively, the three-dimensional exploded view of the liquid crystal display of the present invention and the third figure along the IV-IV direction. The day-to-day display device 30 includes a first base layer 34 and a second base # 37, in which a liquid crystal layer 35 is held, and the first base layer is the first base layer 34 and above: the first layer 3: the bottom mask, and the array 36. ial ^ ^ & ^ / of the color layer 32, the black matrix 33 and the ITO layer 31 are # 3 shirts_7, light sheet (not labeled). The black matrix 33 includes an anti-reflection 1 > < ^ '( ; 1, the light layer 3 33, the anti-reflection layer 3 3 2 and the shielding layer 33 of the black matrix 33 are disposed on the first base layer 34, wherein the anti-reflection layer A 3-the film layer 3 3 2 1 and the second film layer 3 322 are sequentially disposed on the first base layer 34 =, and the refractive index of the second film layer 3 3 2 2 is smaller than the refractive index of the first film layer 3 32 1. The second film layer 3 322 Mainly made of chromium oxide (CrOX, X = 1, 2, 3 ^ material, its thickness is 20 ~ 60 nm; the first film layer 3321 is mainly = made of chromium nitride (CrNY, Y = 1, 2, 3. …) Made of materials with a thickness of 20 to nm. § The light-shielding layer 3 3 3 includes at least one metal of chromium, molybdenum, tungsten, or nickel, and its refractive index is lower than that of the film layer 3 3 2 丨. 1 A black matrix 3 3 is arranged in a row and shape on the first base layer 3 4. A plurality of lattices, in which the coloring units (R, G, B) of the coloring layer 32 are repeatedly filled, so that they are alternately arranged with the black matrix 33 on the first base layer 34. The surface of the black matrix 33 and the coloring layer 32 is covered with a thickness The layer 31 of the uniform hook 31 / Because the thickness of the black matrix 33 is smaller than that of the coloring layer 32, a corresponding matrix-shaped groove (not labeled) is formed on the IT surface of the area where the black matrix 33 is located. The black matrix 33 has 38 spacers on the ITO layer 31 at the intersection of rows and columns.

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The first base layer 3 4 κ does not mean that the thickness of the liquid crystal layer 35 is an average distribution, and makes the 3H liquid crystal display device q η I--clothing d 0 not collapse under external pressure. The spacer 38 may be provided in some places to prepare the extension Q. ^ The black matrix 3 at the intersection of 3 rows and columns, and the black matrix 33 at the intersection of rows and columns is provided without spacers 38. The spacer 3δ is a columnar body, and is made of a photosensitive black resin. Its one end is connected to the ITO layer 31 and the other end is connected to D? Ding array 36. Please refer to the fifth figure. The rows and grooves in the area where the black matrix 33 is located cover a wall 39 and are flush with the 17 () layer 31 in other areas. The height 39 of the stepping body 39 is smaller than that of the spacer 38. Its material is a photosensitive black tree. Due to the low light reflectance of the tree knowing material, the wall 39 can reduce the reflection of the black matrix 33-side backlight At the same time, since the wall can absorb the light incident to the 2 black matrix 33, the light-shielding ability of the black matrix 33 region can be strengthened, thereby improving the contrast ratio of the liquid crystal display device 30. The wall 39 is left over when the spacer 38 is made. Because the door spacer M is manufactured, it is rotated and covered with a photosensitive resin on the first layer 31, and then exposed by using a mask to remove Spacer 3 8 is required to obtain the resin, so the resin above the black matrix 3 3 can be inadequately exposed to obtain the wall-paper 3 9 ′ and control the difference in the degree of exposure to obtain the wall 3 9 with different heights. Please refer to FIG. 6 and FIG. 7 together, which are respectively a perspective exploded view and a cross-sectional view taken along the VImi direction of the second embodiment of the liquid crystal display device of the present invention. The liquid crystal display device 40 includes a first base layer 44 and a second base layer 47. A liquid crystal layer 45 is held therebetween. The second base layer 47 has a TFT array 46 underneath. The first base layer 44 and its coloring layer 42, the black matrix 43 and the IT0 layer 41 together constitute a color filter (not labeled). The black matrix 43 is dyed

200420964 V. Description of the invention (6) The tree 爿 θ is made of a light-sensitive resin or heat-sensitive resin, which is arranged in rows and rows on the first base layer 4 4 to form a plurality of lattices, and the colored layer 42 is repeatedly filled therein. The coloring units (R, G, b) are arranged alternately with the black matrix 43 on the first base layer 44. The surfaces of the black matrix 43 and the colored layer 4 2 are covered with a 1 d 0 layer 4 1 ′, and the surface of the I T 0 layer is flat. Spacers 4 8 are supported on the black matrix 4 at the intersection of 3 rows and columns to support the first base layer 4 4 and the second base layer 47. The interval 4 8 can be set at the intersection of some black matrices 4 3 rows and columns, while other black matrices 4 3 ^ can be set without spacers 4 at the parent cross of the column §. The spacer 48 is a columnar body made of a photosensitive black resin, and one end is connected to the I layer 41 and the other end is connected to the TFT array 4b. Referring to the eighth figure together, the I τ〇 layer 4 1 Fuyi 1 wall 49 in the area where the black matrix 43 is located is arranged in rows and rows on the surface of IT 0 layer 41 and higher than the IT 0 Layer 4 1 surface. The height of the wall 49 is smaller than that of the spacer 48, and the material is a photosensitive black resin. Since the wall body can absorb a part of the incidence = the purity of the black matrix 43, the light shielding ability of the area of the black matrix 43 can be enhanced, thereby improving the contrast ratio of the liquid crystal display device 40. ^ Of course! The color matrices 3 3 and 4 3 can be arranged in a grid pattern on the first 2 34 and 44; the walls 39 and 49 and the spacer "and the cents can be made of resin, the heat-sensitive resin can be a dyed resin ; 'Θ§α =

It is also possible to set 3 0 and 40 without η d, > + Exhibition Day ", Bebe I" υforce ", and instead of spacers 38 and 48, then the wall 39 or ^ rotates on the button. Coverage—photosensitive resin, and then ^^ the film is directly exposed, and the resin in the mask area of the black matrix 33 or 43 is retained; the liquid crystal display device 3 :: may two = zone layer 31 or 41, or Replaced by protecting Λ 不; ^ ίτο 200420964 V. Description of the invention (7) The wall 3 9 and 49 may partially cover the black matrix 3 3 and 43. In summary, the present invention has indeed met the requirements of the invention patent, and a patent application has been filed in accordance with the law. However, the above is only a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above embodiments. For example, those who are familiar with the art of this case make equivalent modifications or changes based on the spirit of the present invention. It should be covered by the following patent applications.

Page 12 200420964 Brief description of the drawings The first diagram is a schematic diagram of a conventional liquid crystal display device. The second figure is a schematic diagram of a conventional color filter. The third figure is an exploded perspective view of the first embodiment of the liquid crystal display device of the present invention. The fourth diagram is a cross-sectional view taken along the IV-IV direction in the third diagram. The fifth figure is a sectional view of the third figure along the V-V direction. The sixth figure is an exploded perspective view of the second embodiment of the liquid crystal display device of the present invention. The seventh figure is a cross-sectional view of the sixth figure along the V I I-V I I direction. The eighth figure is a sectional view taken along the VI I I-VI I I direction in the sixth figure. [Description of main component symbols] LCD display device 30 ^ 40 ITO layer 31, 41 colored layer 32 ^ 42 black matrix 33 > 43 anti-reflection layer 332 first film layer 33 2 1 second film layer 3 3 2 2 light-shielding layer 333 first base layer 34 > 44 liquid crystal layer 35, 45 TFT array 36, 46 second base layer 37 > 47 spacer-38 ^ 48 wall 39, 49

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Claims (1)

200420964, the scope of application for patent 1. A liquid crystal display device, which includes a first g, a wall, a first which is set 2. such as the color moment 3 · as the color moment 4 · as the body position 5 · such as Shen Jing prominent place, the base layer 6. Such as applying body and height 7 · such as applying body and sense tree 8 · such as one base layer color matrix surface m., Two base layers, the first place, the patent application is here The patent shows that the device includes a base layer, a black matrix, a wall, and a second base layer sequentially arranged in the area where the black matrix is located. The surface of the first base layer of the liquid crystal display device described in item 1 of the range is arranged in a grid pattern. The surface of the first base layer of the liquid crystal display device described in the first item of the range is arranged in rows and columns. The color matrix surface of the liquid crystal display device described in the range item 3. The liquid crystal display device described in item 3 of the scope further includes a spacer located at the intersection of the black matrix rows and columns in a columnar shape, which is used to support the first base layer and the second among the black among the black among the wall among the liquid b The liquid crystal display device described in the item 5 of the scope, wherein the wall is made of the same material. The south of the wall is smaller than the interval. Please patent the spacer grease. The liquid crystal display device according to item 6 of the patent scope, wherein the liquid crystal display device according to item 6 of the wall scope, wherein the wall system is made of resin, and the resin is a photosensitive resin or heat Page 14 200420964 6. Scope of patent application The body and the spacer system are made of black resin or dyed resin. 9. The liquid crystal display device according to item 5 of the scope of patent application, wherein the liquid crystal display device further comprises an I T0 layer disposed on the first substrate and the black matrix surface, and the wall and the spacer are located in the IT 0 layer surface. 10. The liquid crystal display device according to item 9 of the scope of the patent application, wherein a groove is formed on the surface of the I T0 layer in the area where the black matrix is located, and the wall is filled with the groove and is flush with other areas of the I T0 . 1 1. The liquid crystal display device according to item 3 of the scope of patent application, wherein the black matrix includes an anti-reflection layer and a light-shielding layer sequentially disposed on the first base layer, and the light-shielding layer includes at least one of chromium, molybdenum, Tungsten or nickel metal. 1 2. The liquid crystal display device according to item 11 of the scope of patent application, wherein the liquid crystal display device further comprises a coloring layer including a plurality of coloring units and the black matrix alternately disposed on the first base layer. 1 3. The liquid crystal display device according to item 12 of the scope of patent application, wherein the thickness of the black matrix is smaller than the thickness of the colored layer. 14. The liquid crystal display device according to item 13 of the scope of patent application, wherein the liquid crystal display device further comprises an I T0 layer disposed on the colored layer and the black, on the surface of the matrix. 15. The liquid crystal display device according to item 14 of the scope of patent application, wherein a groove is formed on the surface of the I T0 layer in the area where the black matrix is located, and the wall is filled with the groove and is aligned with other areas of the I T0 level. 16. The liquid crystal display device according to item 3 of the scope of patent application, wherein the black matrix is made of a dyed resin, and the resin is a photosensitive resin or a thermal resin. Page 15 200420964 VI. Patent application scope 1 7. The liquid crystal display device according to item 16 of the patent application scope, wherein the liquid crystal display device further includes a coloring layer including a plurality of coloring units and the black matrix in the first Alternately set on a base layer. 18. The liquid crystal display device according to item 17 of the scope of patent application, wherein the liquid crystal display device further comprises an I T 0 layer, a protective layer or an alignment layer disposed on the surface of the colored layer and the black matrix. 19. The liquid crystal display device according to item 18 of the scope of patent application, wherein the surface of the layer 1 or the protective layer is flat. 20. The liquid crystal display device according to item 19 of the scope of patent application, wherein the wall is located on the surface of the ITO layer and is higher than the ITO layer. · Page 16