Transmissive positive TN-LCD color display structure
Patent Information
- Application Number
- CN202522437030.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-18
- Publication Date
- 2026-10-09
- Estimated Expiration
- 2035-11-18
AI Technical Summary
透射正性TN显示屏即为其中之一，但现有的透射正性TN显示屏，其显示块都未整块ITO，只能显示黑色显示块，不能实现彩色显示
[0021]本实用新型所提供的透射正性TN-LCD彩色显示结构在使用中，未加电时，液晶层的液晶不翻转，白色背光入射进入下偏光片形成的线偏振光旋转90°后直接从上偏光片出射，即相当于背光的光线被RGB彩膜着色后，毫无阻碍地透过整体透射正性TN-LCD彩色显示结构，而RGB彩膜中的三原色比例为1：1：1，混色后为整体透明状，因此透射正性TN-LCD彩色显示结构的显示屏区域显示为背光的白色；而在透射正性TN-LCD彩色显示结构加电后，而上ITO层中的非镂空区与下ITO层(或下ITO层中的非镂空区与上ITO层)则都形成电场，使得液晶层处于该区间内的液晶发生翻转，不对背光所发出的光线作用，下偏振片形成的偏振光不能偏转，就会与上偏振片的偏振方向垂直，不能透过，形成黑色，而上ITO层中的镂空区与下ITO层之间(或下ITO层中的镂空区与上ITO层之间)由于没有相对的ITO，则不能形成电场，因此液晶层处于该区间内的液晶不会翻转，背光的光线被对应于镂空区一一对应的膜区着色后，就会透射处相应颜色的光，进而混色为确定的颜色。因此，只需根据RGB显色原理，沿RGB彩膜层的宽度方向对正对于RGB彩膜层各膜区的上ITO层或下ITO层进行镂空，使其形成多个镂空区，即可使透射正性TN-LCD彩色显示结构加电后显示出所需显示的颜色，解决了透射正性TN-LCD显示结构不能有颜色显示的问题，且条状电极处加电后的不透光解决了漏光的问题，使RGB彩膜无需黑色矩阵(BM)进行漏光保护。
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Figure CN224840713U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of liquid crystal display technology, and particularly relates to a transmissive positive TN-LCD color display structure. Background Technology
[0002] Liquid crystal displays (LCDs) are widely used flat panel displays, offering advantages such as low power consumption, thinness, light weight, and low driving voltage. With the continuous development of science and technology and the needs of daily life, various new display methods have been developed. Transmissive positive TN displays are one such example; however, existing transmissive positive TN displays do not use single-piece ITO panels, thus only displaying black areas and not color. Utility Model Content
[0003] In view of the problems existing in the prior art, the main objective of this utility model is to provide a transmissive positive TN-LCD color display structure.
[0004] The objective of this utility model is achieved through the following technical solution:
[0005] This invention provides a transmissive positive TN-LCD color display structure, which includes an upper polarizer, a glass liquid crystal cell, a lower polarizer, and a white backlight arranged from top to bottom. The liquid crystal cell is composed of an upper glass substrate, an upper ITO layer, an upper PI alignment layer, a liquid crystal layer, a lower PI alignment layer, a lower ITO layer, and a lower glass substrate arranged from top to bottom. Both the upper polarizer and the lower polarizer are transmissive polarizers.
[0006] It also includes an RGB color filter layer and a color filter protective layer; the RGB color filter layer includes multiple film area units arranged in a rectangular array, each of the film area units including a red film area, a green film area and a blue film area that are connected sequentially along the width direction of the RGB color filter layer and have equal width;
[0007] The RGB color filter layer and the color filter protective layer are disposed sequentially from top to bottom between the upper glass substrate and the upper ITO layer, and the upper ITO layer has multiple hollow areas; or, the RGB color filter layer and the color filter protective layer are disposed sequentially from bottom to top between the lower glass substrate and the lower ITO layer, and the lower ITO layer has multiple hollow areas.
[0008] In the vertical direction, each of the red film area and / or green film area and / or blue film area overlaps with one of the plurality of hollow areas.
[0009] As a further description of the above technical solution, the cross-sectional shape of any of the hollowed-out areas is the same as the shape of the corresponding red film area / green film area / blue film area, and the center of the cross section is located on the same straight line.
[0010] As a further description of the above technical solution, the cross-sectional area of the hollowed-out area is smaller than the cross-sectional area of the corresponding red film area / green film area / blue film area.
[0011] As a further description of the above technical solution, the distance between the edge of the hollow area and the edge of the corresponding red film area / green film area / blue film area is 3μm-5μm.
[0012] As a further description of the above technical solution, the width of any of the red film region / green film region / blue film region is 50μm and the length is 150μm.
[0013] The length of any of the hollowed-out areas is equal, and its value ranges from 140μm to 144μm.
[0014] As a further description of the above technical solution, in the width direction of the RGB color film layer, the widths of each of the hollow areas are equal or unequal.
[0015] As a further description of the above technical solution, the liquid crystal layer is sealed between the upper PI alignment layer and the lower PI alignment layer by a frame adhesive.
[0016] As a further description of the above technical solution, the liquid crystal layer is made of TN-type liquid crystal.
[0017] As a further description of the above technical solution, the polarization axis of the lower polarizer is parallel or perpendicular to the long axis of the TN-type liquid crystal.
[0018] The polarization axis of the upper polarizer is perpendicular to the polarization axis of the lower polarizer.
[0019] As a further description of the above technical solution, the color filter protective layer is made of SiO2.
[0020] Based on the above technical solutions, the outstanding effects of this utility model are as follows:
[0021] In use, the transmissive positive TN-LCD color display structure provided by this utility model, when not powered on, the liquid crystal in the liquid crystal layer does not flip. The linearly polarized light formed by the white backlight incident on the lower polarizer rotates 90° and exits directly from the upper polarizer. This is equivalent to the backlight light being colored by the RGB color film and passing through the entire transmissive positive TN-LCD color display structure without obstruction. The ratio of the three primary colors in the RGB color film is 1:1:1, and after color mixing, it is completely transparent. Therefore, the display area of the transmissive positive TN-LCD color display structure displays the white of the backlight. However, when the transmissive positive TN-LCD color display structure is powered on, the non-cutout area in the upper ITO layer and the lower ITO layer... The ITO layer (or the non-cutout area in the lower ITO layer and the upper ITO layer) both form an electric field, causing the liquid crystal in the liquid crystal layer within this range to flip. This does not affect the light emitted from the backlight. The polarized light formed by the lower polarizer cannot be deflected and will be perpendicular to the polarization direction of the upper polarizer, thus not passing through and forming black. Since there is no corresponding ITO between the cutout area in the upper ITO layer and the lower ITO layer (or between the cutout area in the lower ITO layer and the upper ITO layer), no electric field can be formed. Therefore, the liquid crystal in the liquid crystal layer within this range will not flip. The backlight light, after being colored by the film area corresponding to the cutout area, will transmit the light of the corresponding color, thus mixing the colors to form a specific color. Therefore, by simply cutting out the upper or lower ITO layer corresponding to each film area of the RGB color film layer along the width direction of the RGB color film layer according to the RGB color display principle, forming multiple cutout areas, the transmissive positive TN-LCD color display structure can display the desired color after being powered on. This solves the problem that the transmissive positive TN-LCD display structure cannot display color, and the opacity after being powered on at the strip electrode solves the problem of light leakage, so that the RGB color film does not need a black matrix (BM) for light leakage protection. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the planar structure of the RGB color filter layer in an embodiment of this utility model;
[0023] Figure 2 This is a planar wiring diagram showing the red display achieved by the transmissive positive TN-LCD color display structure in the first embodiment of this utility model;
[0024] Figure 3 This is a schematic diagram of the display principle of the transmissive positive TN-LCD color display structure after power-on in the first embodiment of this utility model;
[0025] Figure 4 This is a partial cross-sectional view of the transmissive positive TN-LCD color display structure in the second embodiment of this utility model;
[0026] Figure 5This is a planar wiring diagram showing the orange display achieved in the transmissive positive TN-LCD color display structure in the second embodiment of this utility model.
[0027] Explanation of icon numbers:
[0028] 11. Upper polarizer; 12. Lower polarizer; 2. White backlight; 31. Upper glass substrate; 32. Upper ITO layer; 33. Upper PI alignment layer; 34. Liquid crystal layer; 35. Lower PI alignment layer; 36. Lower ITO layer; 37. Lower glass substrate; 4. RGB color filter layer; 41. Red film area; 42. Green film area; 43. Blue film area; 5. Color filter protective layer; 6. Cutout area; 7. Frame adhesive. Detailed Implementation
[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0030] In the description of this utility model, it should be noted that the terms "upper," "middle," "lower," "inner," "outer," "front," "rear," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The implementation methods of this utility model will now be described based on its overall structure.
[0031] Please see Figures 1 to 5 This utility model discloses a transmissive positive TN-LCD color display structure, which includes an upper polarizer 11, a glass liquid crystal cell, a lower polarizer 12, and a white backlight 2 arranged from top to bottom; the liquid crystal cell is composed of an upper glass substrate 31, an upper ITO layer 32, an upper PI alignment layer 33, a liquid crystal layer 34, a lower PI alignment layer 35, a lower ITO layer 36, and a lower glass substrate 37 arranged from top to bottom; both the upper polarizer 11 and the lower polarizer 12 are transmissive polarizers;
[0032] It also includes an RGB color filter layer 4 and a color filter protective layer 5; the RGB color filter layer 4 includes multiple film area units arranged in a rectangular array, each of the film area units includes a red film area 41, a green film area 42 and a blue film area 43 that are connected sequentially along the width direction of the RGB color filter layer 4 and have equal widths.
[0033] The RGB color filter layer 4 and the color filter protective layer 5 are disposed sequentially from top to bottom between the upper glass substrate 31 and the upper ITO layer 32, and the upper ITO layer 32 is provided with a plurality of hollow areas 6; or, the RGB color filter layer 4 and the color filter protective layer 5 are disposed sequentially from bottom to top between the lower glass substrate 37 and the lower ITO layer 36, and the lower ITO layer 36 is provided with a plurality of hollow areas 6.
[0034] In the vertical direction, each of the red film area 41 and / or green film area 42 and / or blue film area 43 overlaps with one of the plurality of hollow areas 6.
[0035] With the above structure, when the transmissive positive TN-LCD color display structure is not powered on, the liquid crystal in the liquid crystal layer 34 does not flip. The linearly polarized light formed by the white backlight 2 incident on the lower polarizer 12 rotates 90° and exits directly from the upper polarizer 11. That is, the backlight light is colored by the RGB color film and passes through the entire transmissive positive TN-LCD color display structure without obstruction. The ratio of the three primary colors in the RGB color film is 1:1:1, and after color mixing, it is completely transparent. Therefore, the display area of the transmissive positive TN-LCD color display structure is displayed as white backlight. When the transmissive positive TN-LCD color display structure is powered on, the non-cutout area 6 in the upper ITO layer 32 and the lower ITO layer 36 (or The non-cutout area 6 in the lower ITO layer 36 and the upper ITO layer 32 both form an electric field, causing the liquid crystal in the liquid crystal layer 34 within this range to flip, thus not affecting the light emitted from the backlight. The polarized light formed by the lower polarizer cannot be deflected and will be perpendicular to the polarization direction of the upper polarizer, thus not passing through and forming black. Since there is no corresponding ITO between the cutout area 6 in the upper ITO layer 32 and the lower ITO layer 36 (or between the cutout area 6 in the lower ITO layer 36 and the upper ITO layer 32), no electric field can be formed. Therefore, the liquid crystal in the liquid crystal layer 34 within this range will not flip. After the backlight light is colored by the film area corresponding to the cutout area 6, it will transmit the light of the corresponding color, thus mixing the colors to form a specific color. Therefore, by simply hollowing out the upper ITO layer 32 or lower ITO layer 36 corresponding to each film area of the RGB color film layer 4 along the width direction of the RGB color film layer 4 according to the RGB color display principle, so as to form multiple hollow areas 6, the transmissive positive TN-LCD color display structure can display the desired color after being powered on, which solves the problem that the transmissive positive TN-LCD display structure cannot display color. Moreover, the opacity after being powered on at the strip electrode solves the problem of light leakage, so that the RGB color film does not need a black matrix (BM) for light leakage protection.
[0036] Please see Figures 1 to 3 Specifically, in the first embodiment, the RGB color film layer 4 and the color film protective layer 5 are sequentially disposed between the upper glass substrate 31 and the upper ITO layer 32 from top to bottom. The upper ITO layer 32 has multiple hollow areas 6. Since the transmissive positive TN-LCD color display structure needs to display red after being powered on, in the vertical direction, the multiple hollow areas 6 only need to overlap one-to-one with the red film area 41. Of course, in other embodiments, according to the color display requirements, corresponding hollow areas 6 can be set at the positions of the upper / lower ITO layers 36 corresponding to any of the red film area 41 and / or green film area 42 and / or blue film area 43 in the vertical direction, so that the white backlight 2 transmits light of the corresponding color after being colored.
[0037] Specifically, in this embodiment, the cross-sectional shape of any of the hollowed-out areas 6 is the same as the shape of the corresponding red film area 41 (both are rectangular), and the center of the cross-section is located on the same straight line. Of course, in other embodiments, if the color development involves green and / or blue, the cross-sectional shape of any of the hollowed-out areas 6 can also be the same as the shape of the corresponding green film area 42 / blue film area 43, and the center of the cross-section is located on the same straight line.
[0038] Specifically, in this embodiment, to ensure the etching alignment accuracy of the hollow areas 6 of the upper / lower ITO layers 36, the cross-sectional area of the hollow area 6 is set to be smaller than the cross-sectional area of the corresponding red film area 41 / green film area 42 / blue film area 43. More specifically, in this embodiment, the distance between the edge of each hollow area 6 and the edge of its corresponding red film area 41 is 5 μm, thereby ensuring a 5 μm alignment deviation tolerance during the etching alignment of the hollow area 6. That is, ITO is present at a distance of 5 μm around the periphery of the red film area 41 from both top and bottom viewing angles. Of course, in other embodiments, the distance between the edge of the hollow area 6 and the edge of its corresponding red film area 41 / green film area 42 / blue film area 43 can also be set to other values between 3 μm and 5 μm to ensure a deviation tolerance during etching alignment.
[0039] Specifically, in this embodiment, the width of any of the red film region 41, green film region 42, and blue film region 43 is 50 μm, and the length is 150 μm. The length of any of the hollowed-out regions 6 is equal, at 140 μm, ensuring that ITO is present at a distance of 5 μm from the periphery of each red film region 41. Of course, provided that the distance between the edge of the hollowed-out region 6 and the edge of its corresponding red film region 41 is at least 3 μm to ensure the allowance for deviation during etching alignment, the length of any hollowed-out region 6 can also be any other value between 140 μm and 144 μm.
[0040] Specifically, in this embodiment, the widths of all the hollow areas 6 are equal in the width direction of the RGB color film layer 4. Of course, when other colors need to be mixed to display, according to the RGB color mixing principle, the widths of each hollow area 6 need to be set proportionally, that is, the widths of each hollow area 6 are set to be unequal in the width direction of the RGB color film layer 4. For example... Figures 4 to 5As shown, in the second embodiment, orange needs to be displayed. According to the RGB color mixing and color display principle, the ratio of the area of the red film area 41 to the area of the green film area 42 to the area of the blue film area 43 should be 3:2:0. At the same time, the length of each film area is the same, and the length of each of the hollow areas 6 is equal. Therefore, the corresponding hollow areas 6 are etched directly on the upper ITO layer 32 that is directly opposite the three film areas in the vertical direction according to this ratio. That is, the width of the hollow area 6 opposite each red film area 41 and green film area 42 is 3:2, and the upper ITO layer 32 opposite the blue film area 43 has no hollow area 6 etched.
[0041] Specifically, in this embodiment, the liquid crystal layer 34 is sealed between the upper PI alignment layer 33 and the lower PI alignment layer 35 by the frame adhesive 7.
[0042] Specifically, in this embodiment, the liquid crystal layer 34 is made of TN-type liquid crystal.
[0043] Specifically, in this embodiment, the polarization axis of the lower polarizer 12 is parallel or perpendicular to the long axis of the TN-type liquid crystal; the polarization axis of the upper polarizer 11 is perpendicular to the polarization axis of the lower polarizer 12.
[0044] Specifically, in this embodiment, the color filter protective layer 5 is made of SiO2.
[0045] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any changes, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A transmissive positive TN-LCD color display structure, characterized in that, It includes an upper polarizer, a glass liquid crystal cell, a lower polarizer, and a white backlight arranged from top to bottom; the liquid crystal cell is composed of an upper glass substrate, an upper ITO layer, an upper PI alignment layer, a liquid crystal layer, a lower PI alignment layer, a lower ITO layer, and a lower glass substrate arranged from top to bottom; the upper polarizer and the lower polarizer are both transmission polarizers. It also includes an RGB color filter layer and a color filter protective layer; the RGB color filter layer includes multiple film area units arranged in a rectangular array, each of the film area units including a red film area, a green film area and a blue film area that are connected sequentially along the width direction of the RGB color filter layer and have equal width; The RGB color filter layer and the color filter protective layer are disposed sequentially from top to bottom between the upper glass substrate and the upper ITO layer, and the upper ITO layer has multiple hollow areas; or, the RGB color filter layer and the color filter protective layer are disposed sequentially from bottom to top between the lower glass substrate and the lower ITO layer, and the lower ITO layer has multiple hollow areas. In the vertical direction, each of the red film area and / or green film area and / or blue film area overlaps with one of the plurality of hollow areas.
2. The transmissive positive TN-LCD color display structure according to claim 1, characterized in that, The cross-sectional shape of any of the hollowed-out areas is the same as the shape of the corresponding red / green / blue film areas, and the center of the cross-section is located on the same straight line.
3. The transmissive positive TN-LCD color display structure according to claim 2, characterized in that, The cross-sectional area of the hollowed-out area is smaller than the cross-sectional area of the corresponding red / green / blue membrane area.
4. The transmissive positive TN-LCD color display structure according to claim 3, characterized in that, The distance between the edge of the hollow area and the edge of the corresponding red / green / blue film area is 3μm-5μm.
5. The transmissive positive TN-LCD color display structure according to claim 4, characterized in that, The width of any of the red / green / blue membrane regions is 50 μm and the length is 150 μm. The length of any of the hollowed-out areas is equal, and its value ranges from 140μm to 144μm.
6. The transmissive positive TN-LCD color display structure according to claim 4, characterized in that, In the width direction of the RGB color film layer, the widths of each of the hollow areas may be equal or unequal.
7. The transmissive positive TN-LCD color display structure according to claim 1, characterized in that, The liquid crystal layer is sealed between the upper PI alignment layer and the lower PI alignment layer by a sealant.
8. The transmissive positive TN-LCD color display structure according to claim 1, characterized in that, The liquid crystal layer is made of TN-type liquid crystal.
9. The transmissive positive TN-LCD color display structure according to claim 8, characterized in that, The polarization axis of the lower polarizer is parallel or perpendicular to the long axis of the TN liquid crystal. The polarization axis of the upper polarizer is perpendicular to the polarization axis of the lower polarizer.
10. The transmissive positive TN-LCD color display structure according to claim 1, characterized in that, The color filter protective layer is made of SiO2.