Cholesterol liquid crystal display device and cholesterol liquid crystal panel module therein
By introducing a metal circuit structure and a black light-blocking structure into the cholesteric liquid crystal panel module, the problem of increased impedance of the transparent electrode layer and light reflection of the metal circuit is solved, achieving more efficient circuit conduction and higher quality display effects.
Patent Information
- Application Number
- CN202411494624.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-24
- Publication Date
- 2025-01-21
AI Technical Summary
When the cholesterol liquid crystal panel becomes larger, the overall impedance between the lower transparent electrode layer and the upper transparent electrode layer is increased, affecting the circuit conduction efficiency and control driving difficulty. At the same time, the reflection of the metal line affects the picture contrast.
A lower metal circuit structure and an upper metal circuit structure are introduced into the cholesteric liquid crystal panel module, and a hollow first checkerboard pattern is set in the black light-blocking structure to block the reflection of the metal circuit structure and reduce the impedance of the transparent electrode layer.
By reducing the impedance of the transparent electrode layer, the efficiency of circuit transmission and control driving is improved, and the quality and contrast of the liquid crystal display screen are improved by covering the reflection of the metal line.
Smart Images
Figure CN119335784A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of liquid crystal display technology, and in particular to the optical structure technology of cholesterol liquid crystal panel modules. Background Art
[0002] Cholesteric liquid crystal is one of the main technologies used in e-book displays. Because its liquid crystal molecules have the characteristics of bistable display, they have the effect of saving power. The bistable characteristics of cholesterol liquid crystal molecules refer to the fact that there are two stable states in the natural state, one of which is the reflective state (Planar State) and the other is the transmissive state (Focal-Conic State). In the reflective state, the liquid crystal is arranged neatly and can reflect light of a specific wavelength, which is usually called the bright state. In the transmissive state, the liquid crystal is arranged in a disordered manner, and the incident light will penetrate or be scattered, and rarely be reflected, which is usually called the dark state. Electricity is only required when switching states (switching from the reflective state to the transmissive state, or from the transmissive state to the reflective state). When the picture is still, almost no electricity is required, so the power saving effect is excellent.
[0003] Cholesteric liquid crystal panels are usually provided with a lower transparent electrode layer and an upper transparent electrode layer below and above the liquid crystal layer, respectively, to provide the voltage required for the transition of the cholesterol liquid crystal molecules. The material of the transparent electrode is usually a conductive metal oxide. Although it is conductive, its impedance is greater than that of ordinary metals. When the size of the cholesterol liquid crystal panel becomes larger, the overall impedance of the lower transparent electrode layer and the upper transparent electrode layer will also increase accordingly, which is not conducive to the circuit conduction efficiency and makes the control drive more difficult. Summary of the invention
[0004] The primary purpose of the present application is to propose a cholesterol liquid crystal panel module, which is also provided with a lower metal circuit structure and an upper metal circuit structure corresponding to the lower transparent electrode layer and the upper transparent electrode layer, which can respectively reduce the impedance of the lower transparent electrode layer and the upper transparent electrode layer, thereby improving the efficiency of circuit conduction and control driving.
[0005] Another object of the present application is to propose a cholesterol liquid crystal panel module, which has a black light-blocking structure corresponding to the lower metal circuit structure and the upper metal circuit structure, which can shield the reflection of the metal circuit structure, thereby improving the image quality and contrast of the liquid crystal display screen.
[0006] In order to achieve the purpose of this application, the first preferred embodiment of the present application proposes a cholesterol liquid crystal panel module, including a lower substrate, a lower insulating isolation layer, a lower transparent electrode layer, a cholesterol liquid crystal layer, an upper transparent electrode layer, an upper insulating isolation layer, and an upper substrate arranged in order from bottom to top. The cholesterol liquid crystal panel module also includes a black light-blocking structure, a lower metal circuit structure and an upper metal circuit structure. The black light-blocking structure has a hollow first checkerboard pattern and is arranged below the upper substrate. The lower metal circuit structure is arranged above the lower substrate and includes a plurality of parallel first metal wires. The upper metal circuit structure is arranged below the black light-blocking structure and includes a plurality of parallel second metal wires. The horizontal projections of the second metal wires and the first metal wires are perpendicular to each other to form a second checkerboard pattern.
[0007] The lower transparent electrode layer and the upper transparent electrode layer are respectively provided with a plurality of first openings and a plurality of second openings at positions corresponding to the first checkerboard pattern. The horizontal projection area of the first checkerboard pattern is respectively greater than and covers the horizontal projection areas of the second checkerboard pattern, the first opening, and the second opening. At a position close to the second opening, the distance from the side edge of the second metal wire to the side edge of the first checkerboard pattern is D1, and the distance from the upper edge of the first metal wire to the lower edge of the first checkerboard pattern is D2, and D1 and D2 satisfy Tan -1 The relationship between (D1 / D2)≥30°.
[0008] The present application further proposes a second preferred embodiment, which is a cholesterol liquid crystal display device, comprising a plurality of stacked cholesterol liquid crystal panel modules, wherein the characteristics of the cholesterol liquid crystal panel modules are as described in the cholesterol liquid crystal panel module of the aforementioned first preferred embodiment.
[0009] The advantages and spirit of the present application can be further understood through the following detailed description and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] The provided drawings are used to provide a further understanding of the technical solution of the present application. They constitute a part of the specification, are used to illustrate the implementation methods of the present application, and together with the text description, explain the principles of the present application. Obviously, the provided drawings are not and do not need to be drawn according to the actual size. They are used to explain the embodiments of the present application and are not used to limit the implementation methods of the present application. For ordinary technicians in this field, other drawings can be derived from these drawings without creative work. The provided drawings include:
[0011] Figure 1 It is a first preferred embodiment of the present application, a schematic diagram of a cholesterol liquid crystal panel module;
[0012] Figure 2is a schematic diagram of the reflective shielding angle of the black light-blocking structure in the cholesterol liquid crystal panel module embodiment of the present application;
[0013] Figure 3 This is the second preferred embodiment of the present application, a schematic diagram of a cholesterol liquid crystal display device.
[0014] Reference numerals:
[0015] 10: Cholesteric liquid crystal panel module; 11: Lower substrate; 12: Upper substrate
[0016] 91: lower insulating layer; 92: upper insulating layer
[0017] 21: lower transparent electrode layer; 22: upper transparent electrode layer
[0018] 30: Cholesteric liquid crystal layer; 31: Liquid crystal spacer structure
[0019] 40: First Checkerboard Pattern
[0020] 51: first metal wire; 52: second metal wire
[0021] 211: first opening; 221: second opening
[0022] θr: reflection angle of the lower metal circuit structure
[0023] W_bm: Line width of the first checkerboard pattern
[0024] W_m: Width of the first metal line
[0025] D1: The distance from the edge of the second metal line to the side edge of the first checkerboard pattern
[0026] D2: The distance from the upper edge of the first metal wire to the lower edge of the first checkerboard pattern
[0027] D3: The distance from the upper surface of the lower substrate to the lower edge of the first checkerboard pattern
[0028] 100: Cholesteric liquid crystal display device DETAILED DESCRIPTION
[0029] The specific structural and functional details disclosed in the description of this application are only representative and are for the purpose of describing the exemplary embodiments of this application. This application can be implemented in many alternative forms and should not be interpreted as being limited to only the embodiments disclosed herein.
[0030] It should be understood that the terms "center", "lateral", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. in the description of this application indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. Except for the applicant's special emphasis and definition of their functional roles, they are only for the convenience of describing this application, 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 cannot be understood as limitations on this application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as relative importance or the number of implied technical features. In the description of this application, unless otherwise specified, "multiple" means two or more. In addition, the term "including" and any variation thereof means "at least including".
[0031] It should also be understood that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" in the description of this application should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrally formed connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. A person of ordinary skill in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0032] Unless the context clearly indicates otherwise, the terms "one", "an" and "an item" in the description of this application are also intended to include the plural. It should also be understood that the terms "include" and / or "comprise" stipulate the existence of stated features, steps, operations, units and / or components, but do not exclude the existence or addition of one or more other features, steps, operations, units, components and / or combinations thereof.
[0033] The first preferred embodiment of the present application is a cholesterol liquid crystal panel module 10, see Figure 1 The cholesteric liquid crystal panel module 10 includes a lower substrate 11, a lower insulating isolation layer 91, a lower transparent electrode layer 21, a cholesteric liquid crystal layer 30, an upper transparent electrode layer 22, an upper insulating isolation layer 92, and an upper substrate 12 arranged in order from bottom to top.
[0034] In the cholesterol liquid crystal layer 30, in order to maintain a certain thickness of the liquid crystal layer, a liquid crystal spacing structure 31 composed of organic particles or inorganic particles is used. The state of the liquid crystal molecules is controlled by voltage to form a reflection state or a penetration state. In the penetration state, in order to improve the contrast of the picture, it is necessary to prevent the interlayer reflected light from passing through as much as possible. However, the existing liquid crystal spacing structure is transparent and non-optically active, and the interlayer reflected light easily penetrates the liquid crystal spacing structure, which significantly reduces the contrast of the cholesterol liquid crystal panel and seriously affects the display quality. In order to solve this problem, the cholesterol liquid crystal panel module 10 of the present application therefore also includes a black light-blocking structure, which has a hollow first checkerboard pattern 40, which is arranged below the upper substrate 12, corresponding to the liquid crystal spacing structure 31, and the line width of the first checkerboard pattern 40 is greater than the line width of the liquid crystal spacing structure 31. Since the upper substrate 12 is generally made of glass, which is harder in texture, and the upper insulating isolation layer 92 is softer in texture, more specifically, the first checkerboard pattern 40 of the black light-blocking structure is recessed in the upper insulating isolation layer 92.
[0035] like Figure 1 As shown, the cholesterol liquid crystal panel module 10 further includes a lower metal circuit structure, which is disposed above the lower substrate 11, and includes a plurality of parallel first metal lines 51, and corresponds to the first checkerboard pattern 40. More specifically, the first metal lines 51 are recessed in the lower insulating isolation layer 91, and their horizontal projections are covered by the horizontal projections of the first checkerboard pattern 40. The first metal lines 51 are electrically connected to the lower transparent electrode layer 21, and the other end is connected to the driving circuit, thereby reducing the overall impedance of the lower transparent electrode layer 21 between the driving circuit and the cholesterol liquid crystal layer 30.
[0036] The material of the first metal wire 51 is metal. When external light penetrates the upper substrate 12 and the cholesterol liquid crystal layer 30 and irradiates the first metal wire 51, reflection will be formed. If there is no shielding object to block the reflection, the reflection will penetrate the cholesterol liquid crystal layer 30 and the upper substrate 12 and emit from the display screen, seriously affecting the contrast of the screen. Another purpose of the black light-blocking structure of the present application is to block the reflection of the first metal wire 51, so the horizontal projection area of the first checkerboard pattern 40 is larger than and covers the horizontal projection area of the first metal wire 51.
[0037] like Figure 1As shown, the cholesterol liquid crystal panel module 10 also includes an upper metal circuit structure, including a plurality of parallel second metal wires 52, which are arranged below the black light-blocking structure. More specifically, the second metal wires 52 are also recessed in the upper insulating isolation layer 92. The horizontal projection of the second metal wires 52 is perpendicular to the horizontal projection of the first metal wires 51, and the two form a second checkerboard pattern. The upper metal circuit structure 52 is electrically connected to the upper transparent electrode layer 22, and the other end is connected to the driving circuit, thereby reducing the overall impedance of the upper transparent electrode layer 22 between the driving circuit and the cholesterol liquid crystal layer 30. At the same time, the first checkerboard pattern 40 of the black light-blocking structure must also shield the reflection of the second metal wires 52, so the horizontal projection area of the first checkerboard pattern 40 must also be larger than and cover the horizontal projection area of the second metal wires 52. More specifically, since the horizontal projection of the second metal wires 52 and the horizontal projection of the first metal wires 51 form the second checkerboard pattern, the horizontal projection area of the first checkerboard pattern 40 of the black light-blocking structure must be larger than and cover the horizontal projection area of the second checkerboard pattern.
[0038] In order to achieve a better reflection shielding effect, the line width of the first checkerboard pattern 40 of the black light-blocking structure must be wide enough. Considering the material properties of the upper substrate 12, the upper insulating isolation layer 92, the upper transparent electrode layer 22, and the cholesterol liquid crystal layer 30, the present application found that the line width of the first checkerboard pattern 40 must be able to shield the reflection angle θr of the first metal line 51 to at least 30 degrees. Figure 2 That is to say, when the reflection angle θr at the edge of the first metal line 51 reaches 30 degrees, it can still be shielded by the first checkerboard pattern 40. To achieve this purpose, at a position close to the second opening 221, the distance from the side edge of the second metal line 52 to the side edge of the first checkerboard pattern 40 is D1, and the distance from the upper edge of the first metal line 51 to the lower edge of the first checkerboard pattern 40 is D2. D1 and D2 must satisfy θr =
[0039] Tan -1 (D1 / D2)≥30°.
[0040] Since the thickness of the first metal wire 51 is very thin and difficult to measure, the above relationship can be adjusted to θr = Tan -1 (D1 / D3)≥30°, where D3 is the distance between the upper surface of the lower substrate 11 and the lower edge of the first checkerboard pattern 40. This ensures that the first metal wire 51 can be shielded by the first checkerboard pattern 40 when the reflection angle θr at the edge reaches 30 degrees.
[0041] Furthermore, if Figure 1As shown, the line center line of the first metal line 51 and the line center line of the second metal line 52 are aligned with the line center line of the first checkerboard pattern 40, and the width of the first metal line 51 is the same as the width of the second metal line 52. In this case, the aforementioned D1 can be calculated by D1=(W_bm-W_m) / 2, wherein W_bm is the line width of the first checkerboard pattern 40, and W_m is the width of the first metal line 51 and the second metal line 52.
[0042] In the present application, the lower transparent electrode layer 21 is provided with a plurality of first openings 211 at positions corresponding to the first checkerboard pattern 40; the upper transparent electrode layer 22 is provided with a plurality of second openings 221 at positions corresponding to the first checkerboard pattern 40. More specifically, the first openings 211 and the second openings 221 correspond to the liquid crystal spacing structure 31, and therefore, the horizontal projection area of the first checkerboard pattern 40 is also larger than the horizontal projection areas of the first openings 211 and the second openings 221, respectively.
[0043] Furthermore, the first opening 211 and the second opening 221 have the same width, and their center lines are aligned with each other.
[0044] More specifically, Figure 1 As shown, the center line of the second opening 221 does not coincide with the center line of the first checkerboard pattern 40, and there is a deviation between the two with a distance greater than 0. At the same time, the center line of the first opening 211 does not coincide with the center line of the first checkerboard pattern 40, and there is also a deviation between the two with a distance greater than 0.
[0045] More specifically, in order to establish electrical conduction between the first metal line 51 and the lower transparent electrode layer 21, a portion of the horizontal projection of the first metal line 51 falls outside the horizontal projection of the first opening 211, such as Figure 1 At the same time, in order to establish electrical conduction between the second metal line 52 and the upper transparent electrode layer 22 , a portion of the horizontal projection of the second metal line 52 falls outside the horizontal projection of the second opening 221 .
[0046] Based on the same technical concept, the present application proposes a second preferred embodiment, which is a cholesteric liquid crystal display device 100, comprising a plurality of stacked cholesteric liquid crystal panel modules 10, such as Figure 3 The cholesteric liquid crystal panel module 10 is the cholesteric liquid crystal panel module 10 described in the first preferred embodiment.
[0047] The cholesteric liquid crystal panel module 10 and the cholesteric liquid crystal display device 100 proposed in the present application have the following advantages:
[0048] 1. The first metal wire 51 is disposed corresponding to the lower transparent electrode layer 21 , and the second metal wire 52 is disposed corresponding to the upper transparent electrode layer 22 , which can respectively reduce the impedance of the lower transparent electrode layer 21 and the upper transparent electrode layer 22 , thereby improving the efficiency of circuit conduction and control driving.
[0049] Second, a black light-blocking structure is provided corresponding to the first metal line 51 and the second metal line 52. The black light-blocking structure has a hollow first chessboard pattern 40. With a special width design, it can effectively shield the reflection of the metal line, thereby improving the image quality and contrast of the cholesterol liquid crystal display.
[0050] The above preferred embodiments are described in detail to more clearly describe the features and spirit of the present application, but are not intended to limit the scope of the present application by the above disclosed preferred embodiments. On the contrary, the purpose is to cover various equivalent changes within the scope of the claims to be applied for by the present application.
Claims
1. A cholesteric liquid crystal panel module, comprising a lower substrate (11), a lower insulating isolation layer (91), a lower transparent electrode layer (21), a cholesteric liquid crystal layer (30), an upper transparent electrode layer (22), an upper insulating isolation layer (92), and an upper substrate (12) arranged in order from bottom to top, characterized in that: The cholesteric liquid crystal panel module also includes a black light-blocking structure, a lower metal circuit structure and an upper metal circuit structure; The black light-blocking structure has a hollowed-out first checkerboard pattern (40) and is arranged below the upper substrate (12); The lower metal circuit structure is arranged above the lower substrate (11) and comprises a plurality of parallel first metal wires (51); The upper metal circuit structure is arranged below the black light-blocking structure, and comprises a plurality of parallel second metal lines (52), wherein the horizontal projections of the second metal lines (52) and the first metal lines (51) are perpendicular to each other, forming a second checkerboard pattern; The lower transparent electrode layer (21) and the upper transparent electrode layer (22) are respectively provided with a plurality of first openings (211) and a plurality of second openings (221) at positions corresponding to the first checkerboard pattern (40); The horizontal projection area of the first checkerboard pattern (40) is larger than and covers the horizontal projection areas of the second checkerboard pattern, the first opening (211), and the second opening (221); At a position close to the second opening (221), the distance from the side edge of the second metal wire (52) to the side edge of the first checkerboard pattern (40) is D1, and the distance from the upper edge of the first metal wire (51) to the lower edge of the first checkerboard pattern (40) is D2, and D1 and D2 satisfy Tan -1 The relationship between (D1 / D2)≥30°.
2. The cholesteric liquid crystal panel module according to claim 1, characterized in that: The distance between the upper edge of the lower substrate (11) and the lower edge of the first checkerboard pattern (40) is D3, and D1 and D3 satisfy Tan -1 The relationship between (D1 / D3)≥30°.
3. The cholesteric liquid crystal panel module according to claim 2, characterized in that: The first checkerboard pattern (40) and the second metal line (52) are recessed in the upper insulating isolation layer (92).
4. The cholesteric liquid crystal panel module according to claim 2, characterized in that: The first metal wire (51) is recessed in the lower insulating isolation layer (91).
5. The cholesteric liquid crystal panel module according to claim 2, characterized in that: The line center line of the first metal line (51) is aligned with the line center line of the first checkerboard pattern (40), the line center line of the second metal line (52) is aligned with the line center line of the first checkerboard pattern (40), and the second metal line (52) has the same width as the first metal line (51).
6. The cholesteric liquid crystal panel module according to claim 5, characterized in that: The first opening (211) and the second opening (221) have the same width, and the center lines of the two openings are aligned with each other.
7. The cholesteric liquid crystal panel module according to claim 6, characterized in that: There is an offset distance greater than 0 between the line center line of the second opening (221) and the line center line of the first checkerboard pattern (40).
8. The cholesteric liquid crystal panel module according to claim 7, characterized in that: A portion of the horizontal projection of the first metal wire (51) falls outside the horizontal projection of the first opening (211).
9. The cholesteric liquid crystal panel module according to claim 8, characterized in that: The line width of the first checkerboard pattern (40) is W_bm, the width of the first metal line (51) is W_m, D1 = (W_bm-W_m) / 2.
10. A cholesteric liquid crystal display device, comprising a plurality of stacked cholesteric liquid crystal panel modules, characterized in that: The cholesteric liquid crystal panel module is the cholesteric liquid crystal panel module according to any one of claims 1 to 9.