Low-temperature starting display panel
By setting a black shielding layer at the edge of the heating layer to block light, the problems of LCD panel startup and edge bright lines in low-temperature environments are solved, thus improving display quality and contrast.
Patent Information
- Application Number
- CN202520042546.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-08
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2035-01-08
AI Technical Summary
The LCD panel cannot start normally in low temperature environments, and bright lines appear at the edge wiring positions.
A black shielding layer is set at the edge of the heating layer to cover the area where the metal-coated electrode layer overlaps with the first polarizer, blocking the light emitted by the backlight module and preventing it from being reflected onto the metal-coated electrode layer.
It effectively blocks light reflection, avoids bright lines at the edges, and improves display contrast and display effect.
Smart Images
Figure CN223582272U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of display panels, and in particular to a low-temperature starting display panel. BACKGROUND
[0002] Liquid crystal display (LCD) occupies a dominant position in many display devices due to its excellent performance and mature technology. Such a display screen is usually composed of three main parts: an array substrate, a color film substrate opposite to the array substrate, and a liquid crystal layer between the two. The liquid crystal material itself exhibits high viscosity under low temperature conditions, which leads to a decrease in response speed and may cause a trailing phenomenon when the liquid crystal display works in a low temperature environment. If the working temperature is lower than the low temperature threshold of the liquid crystal material, the liquid crystal display may even fail to work normally.
[0003] In order to solve the problem that the liquid crystal display panel cannot start under low temperature, a heating layer is arranged on the outer side of the array substrate away from the color film substrate, Figure 1 is a sectional view of a low-temperature starting display panel in the prior art; Figure 2 is a top view of the low-temperature starting display panel in the prior art after starting, as Figure 1 shown, a low-temperature starting display panel is provided, which includes a glue frame, a backlight, a polaroid, a heating layer and a display liquid crystal box arranged in layers. The display liquid crystal box includes an array substrate, a color film substrate arranged opposite to the array substrate, and a liquid crystal layer arranged between the array substrate and the color film substrate. The heating layer is arranged on the surface of the array substrate away from the liquid crystal layer. A metal plated electrode layer with a preset width is arranged on the edge of the surface of the heating layer close to the array substrate.
[0004] The LCD liquid crystal is heated under a low temperature environment to restore its normal display temperature. The edge trace of the heating layer needs to use a metal plated electrode layer with a low resistance. The metal can be Cu, Mo, Al, Mo, etc. because the total thickness of the heating layer and the metal plated electrode layer needs to be controlled within a certain range. Therefore, in order to ensure that the metal plated electrode layer has a low resistance, a wider metal plated electrode layer must be designed. However, in order to improve the display effect and user experience, the existing display screen will design a narrower glue frame frame. When the metal plated electrode layer is wider, it will inevitably cover the edge of the polaroid adjacent to the glue frame, causing the LCD to appear a bright line at the position of the edge trace when it is turned on, as Figure 2 shown. SUMMARY
[0005] The purpose of the present application is to solve the problem of bright lines appearing at the position of the edge trace, and to provide a low-temperature starting display panel which solves the above-mentioned problem through optimized design.
[0006] To achieve the above-mentioned purpose, the present application provides a low-temperature starting display panel, comprising a backlight module, a first polaroid, a heating layer and a display liquid crystal box which are stacked, the backlight module is located at the light entrance side of the display liquid crystal box, the display liquid crystal box comprises a first substrate, a second substrate which is oppositely arranged with the first substrate, and a liquid crystal layer which is arranged between the first substrate and the second substrate, the first substrate is located at the side away from the backlight module, the heating layer is arranged on the surface of the second substrate away from the liquid crystal layer, a metal-coated electrode layer with a preset width is arranged on the edge of the upper surface of the heating layer close to the surface of the second substrate, a black shielding layer is arranged on the edge of the upper surface of the heating layer close to the metal-coated electrode layer or on the edge of the lower surface of the heating layer away from the metal-coated electrode layer, the black shielding layer is located directly below the metal-coated electrode layer and covers the area of the metal-coated electrode layer overlapping with the first polaroid, and the black shielding layer is used to shield the light emitted by the backlight module and irradiated onto the metal-coated electrode layer after passing through the first polaroid.
[0007] As a further improvement of the present application, the thickness of the metal-coated electrode layer is 0.5-1 μm, and the width of the metal-coated electrode layer is 3-4 mm.
[0008] As a further improvement of the present application, the backlight module comprises a rubber frame, a backlight source, a reflective film, a light guide plate, a diffusion film and a brightness enhancement film, the rubber frame is a groove structure, and the backlight source, the reflective film, the light guide plate, the diffusion film, the brightness enhancement film and the first polaroid are sequentially stacked in the groove structure.
[0009] As a further improvement of the present application, the width of the concave edge of the groove structure is 0.5-1.5 mm.
[0010] As a further improvement of the present application, the width of the black shielding layer is set to cover the area of the metal-coated electrode layer overlapping with the first polaroid, and the width of the black shielding layer can be but is not limited to 1.5-3.5 mm, and specifically can be 2.0 mm, 2.5 mm, 3.0 mm, etc.
[0011] As a further improvement of the present application, when the black shielding layer is located between the heating layer and the metal-coated electrode layer, the thickness of the black shielding layer is 0.05-0.08 μm.
[0012] As a further improvement of the present application, the black shielding layer is a metal oxide black shielding layer.
[0013] As a further improvement of the present application, when the black shielding layer is located between the heating layer and the first polarizer, the thickness of the black shielding layer is 1-3 μm.
[0014] As a further improvement of the present application, the black shielding layer is a printed ink black shielding layer.
[0015] As a further improvement of the present application, the heating layer is an ITO heating layer.
[0016] As a further improvement of the present application, a second polarizer is stacked on the surface of the first substrate away from the liquid crystal layer.
[0017] As a further improvement of the present application, the first substrate is a color filter substrate and the second substrate is an array substrate.
[0018] The present application has the beneficial effect that it provides a low-temperature starting display panel, which comprises a backlight module, a first polarizer, a heating layer and a display liquid crystal cell stacked in sequence, the backlight module is located at the light-incident side of the display liquid crystal cell, the heating layer is arranged on the surface of the second substrate away from the liquid crystal layer, a metal-coated electrode layer with a preset width is arranged on the edge of the heating layer close to the surface of the second substrate, a black shielding layer is arranged on the edge of the upper surface of the heating layer close to the metal-coated electrode layer or on the edge of the lower surface of the heating layer away from the metal-coated electrode layer, the black shielding layer is located directly below the metal-coated electrode layer and covers the area where the metal-coated electrode layer and the first polarizer overlap. By arranging the black shielding layer, the light emitted by the backlight module and irradiated onto the metal-coated electrode layer after passing through the first polarizer can be blocked, and the problem of edge bright lines caused by the reflection of light by the metal-coated electrode layer can be avoided. BRIEF DESCRIPTION OF DRAWINGS
[0019] Figure 1 is a sectional view of a low-temperature starting display panel in the prior art;
[0020] Figure 2 is a top view of a low-temperature starting display panel in the prior art after starting;
[0021] Figure 3 is a structure diagram of a low-temperature starting display panel of Example 1;
[0022] Figure 4 is a structure diagram of a low-temperature starting display panel of Example 2.
[0023] In the figure: 1, backlight module; 2, first polarizer; 3, heating layer; 4, display liquid crystal box; 41, first substrate; 42, liquid crystal layer; 43, second substrate; 31, metal plated electrode layer; 5, black shielding layer; 6, second polarizer. DETAILED DESCRIPTION
[0024] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the present application, but not to limit the scope of the present application.
[0025] The terms "first", "second", "third", "fourth" and the like (if any) in the description and claims of the present application are used to distinguish similar objects, and do not necessarily have to describe a particular order or sequence.
[0026] The terms "up", "down", "left", "right", "front", "back", "top", "bottom" and the like (if any) in the description and claims of the present application are defined by the position of the structure in the figure and the position of the structure relative to each other, only to express the technical solution clearly and conveniently. It should be understood that the use of the terms should not limit the scope of the application claimed.
[0027] A low-temperature start display panel, comprising a backlight module 1, a first polarizer 2, a heating layer 3 and a display liquid crystal box 4 arranged in a stack, the backlight module 1 is located on the light-in side of the display liquid crystal box 4, the display liquid crystal box 4 comprises a first substrate 41, a second substrate 43 arranged opposite to the first substrate 41, and a liquid crystal layer 42 arranged between the first substrate 41 and the second substrate 43, the first substrate 41 is located on the side away from the backlight module 1, the heating layer 3 is arranged on the surface of the second substrate 43 away from the liquid crystal layer 42, a metal plated electrode layer 31 with a predetermined width is provided on the edge of the surface of the heating layer 3 close to the second substrate 43, a black shielding layer 5 is provided on the edge of the upper surface of the heating layer 3 close to the metal plated electrode layer 31 or on the edge of the lower surface of the heating layer 3 away from the metal plated electrode layer 31, the black shielding layer 5 is located directly below the metal plated electrode layer 31 and covers the area of the metal plated electrode layer 31 overlapping with the first polarizer 2, the black shielding layer 5 is used to shield the light emitted by the backlight module 1 and irradiated onto the metal plated electrode layer 31 after passing through the first polarizer. The first polarizer 2 in this embodiment is located between the backlight module 1 and the heating layer 3.
[0028] By setting the heating layer 3 on the surface of the second substrate 43, the LCD liquid crystal can be heated in a low temperature environment to restore the normal display temperature, solving the problem that the liquid crystal display panel cannot start in a low temperature environment. At the same time, the black shielding layer 5 can block the light emitted by the backlight module 1 and irradiated on the metal-coated electrode layer 31 through the polaroid, avoiding the problem of edge bright lines caused by the reflection of the metal-coated electrode layer 31. The preset width of the metal-coated electrode layer 31 is set according to actual production needs, such as 1 mm, 2 mm, 3 mm, 4 mm, etc.
[0029] In an optional embodiment, the thickness of the metal-coated electrode layer 31 is 0.5 μm to 1 μm, and the width of the metal-coated electrode layer 31 is 3 mm to 4 mm. The metal-coated electrode layer 31 with a specific thickness and width designed in the application can optimize the heating efficiency and uniformity of the heating layer 3, ensuring that the heating layer 3 can effectively start and heat the liquid crystal layer 42.
[0030] In an optional embodiment, the backlight module 1 includes a rubber frame, a backlight source, a reflective film, a light guide plate, a diffusion film, and a brightening film. The rubber frame is a groove structure, and the backlight source, the reflective film, the light guide plate, the diffusion film, the brightening film, and the first polaroid 2 are sequentially stacked in the groove structure. The stacked arrangement of the backlight module 1 and the groove structure design of the rubber frame provide a compact and stable backlight unit, which helps to improve the overall structural strength and reliability of the display panel.
[0031] In an optional embodiment, the width of the concave edge of the groove structure is 0.5 mm to 1.5 mm. The design of the width of the concave edge of the groove structure can ensure that the components of the backlight module 1 are tightly fitted, reduce light leakage, and improve display quality.
[0032] In an optional embodiment, the width of the black shielding layer 5 is set to cover the area where the metal-coated electrode layer 31 overlaps with the first polaroid 2. The width of the black shielding layer 5 can be, but is not limited to, 1.5 mm to 3.5 mm, and can be specifically 2.0 mm, 2.5 mm, 3.0 mm, etc. The black shielding layer 5 is designed with an appropriate width, which can effectively block the light irradiated on the metal-coated electrode layer 31, avoid the problem of edge bright lines, and also reduce light interference and improve display contrast.
[0033] In an optional embodiment, when the black shielding layer 5 is located between the heating layer 3 and the metal-coated electrode layer 31, the thickness of the black shielding layer 5 is 0.05 μm to 0.08 μm. The design of a specific thickness provides sufficient light shielding effect and minimizes the impact on heating performance.
[0034] In an optional embodiment, the black shielding layer 5 is a metal oxide black shielding layer 5. The metal of the metal oxide black shielding layer 5 is consistent with the metal of the metal plating film electrode layer 31, which can be but is not limited to Cu, Al, Mo, etc. The metal oxide black shielding layer 5 can improve the combination between the metal oxide black shielding layer 5 and the metal plating film electrode layer 31, and can provide good electrical conductivity, light shielding property and electrical insulation between layers.
[0035] In an optional embodiment, when the black shielding layer 5 is located between the heating layer 3 and the first polarizer 2, the black shielding layer 5 is a printed ink black shielding layer 5, and the thickness of the black shielding layer 5 is 1 μm-3 μm. The printed ink can be tightly attached to the heating layer 3 and the first polarizer 2, can be mass-produced, has high cost-effectiveness and is easy to implement. At the same time, the printed ink has a certain flexibility and can adapt to different layering pressures.
[0036] In an optional embodiment, the heating layer 3 is an indium tin oxide (ITO) heating layer 3. ITO has high transparency and good heat resistance, and is suitable for low-temperature starting of a liquid crystal display panel.
[0037] In an optional embodiment, a second polarizer 6 is stacked on the surface of the first substrate 41 away from the liquid crystal layer 42. The polarization direction of the second polarizer 6 is perpendicular to that of the first polarizer 2.
[0038] In an optional embodiment, the first substrate 41 is a color film substrate, and the second substrate 43 is an array substrate.
[0039] The application also provides specific embodiments to prove that the technical scheme of the application has excellent effects, which are as follows:
[0040] Embodiment 1
[0041] The embodiment provides a low-temperature starting display panel, which comprises a backlight module 1, a first polarizer 2, a heating layer 3, a display liquid crystal box 4 and a second polarizer 6 which are stacked, the backlight module 1 is located on the light entering side of the display liquid crystal box 4, the display liquid crystal box 4 comprises a first substrate 41, a second substrate 43 which is oppositely arranged to the first substrate 41, and a liquid crystal layer 42 arranged between the first substrate 41 and the second substrate 43, the first substrate 41 is located on the side away from the backlight module 1, the heating layer 3 is arranged on the surface of the second substrate 43 away from the liquid crystal layer 42, and the second polarizer 6 is stacked on the surface of the first substrate 41 away from the liquid crystal layer 42. Figure 3 As shown in the figure, the low-temperature starting display panel comprises a backlight module 1, a first polarizer 2, a heating layer 3, a display liquid crystal box 4 and a second polarizer 6 which are stacked, the backlight module 1 is located on the light entering side of the display liquid crystal box 4, the display liquid crystal box 4 comprises a first substrate 41, a second substrate 43 which is oppositely arranged to the first substrate 41, and a liquid crystal layer 42 arranged between the first substrate 41 and the second substrate 43, the first substrate 41 is located on the side away from the backlight module 1, the heating layer 3 is arranged on the surface of the second substrate 43 away from the liquid crystal layer 42, and the second polarizer 6 is stacked on the surface of the first substrate 41 away from the liquid crystal layer 42.
[0042] A metal-coated electrode layer 31 with a preset width is provided on the heating layer 3 near the edge of the surface of the second substrate 43. A black shielding layer 5 is provided on the lower surface of the heating layer 3 near the edge of the metal-coated electrode layer 31. The black shielding layer 5 is located directly below the metal-coated electrode layer 31 and covers the area where the metal-coated electrode layer 31 overlaps with the first polarizer 2. The black shielding layer 5 is a metal oxide black shielding layer 5.
[0043] In the display panel, the first polarizer 2 is used to convert the light beam generated by the backlight module 1 into polarized light, and the second polarizer 6 is used to analyze the polarized light after being electrically modulated by the liquid crystal, to generate bright and dark contrasts, thereby generating a display image.
[0044] Example 2
[0045] This embodiment provides a low-temperature start display panel, which comprises a backlight module 1, a first polarizer 2, a heating layer 3, a display liquid crystal box 4, and a second polarizer 6, which are stacked as shown. Figure 4 The backlight module 1 is located on the light-incident side of the display liquid crystal box 4. The display liquid crystal box 4 comprises a first substrate 41, a second substrate 43 arranged opposite to the first substrate 41, and a liquid crystal layer 42 arranged between the first substrate 41 and the second substrate 43. The first substrate 41 is located away from the backlight module 1. The heating layer 3 is arranged on the surface of the second substrate 43 away from the liquid crystal layer 42. The second polarizer 6 is stacked on the surface of the first substrate 41 away from the liquid crystal layer 42.
[0046] A metal-coated electrode layer 31 with a preset width is provided on the heating layer 3 near the edge of the surface of the second substrate 43. A black shielding layer 5 is provided on the lower surface of the heating layer 3 near the edge of the metal-coated electrode layer 31. The black shielding layer 5 is located directly below the metal-coated electrode layer 31 and covers the area where the metal-coated electrode layer 31 overlaps with the first polarizer 2. The black shielding layer 5 is a metal oxide black shielding layer 5.
[0047] In the display panel, the first polarizer 2 is used to convert the light beam generated by the backlight module 1 into polarized light, and the second polarizer 6 is used to analyze the polarized light after being electrically modulated by the liquid crystal, to generate bright and dark contrasts, thereby generating a display image.
[0048] Comparative Example 1
[0049] The difference between this comparative example and Example 1 is that a metal oxide black shielding layer 5 is provided.
[0050] The reflectance of the metal plated electrode layer 31 of the present comparative example 1 was 56%, and the reflectance of the metal plated electrode layer 31 of Example 1 was 5.4%. That is, after the black shielding layer 5 was added in Example 1, the reflectance of the metal plated electrode layer 31 was greatly reduced, and the edge bright line problem was solved.
[0051] Comparative Example 2
[0052] The present comparative example and Example 2 differ in that the printed ink black shielding layer 5 was not provided.
[0053] The reflectance of the metal plated electrode layer 31 of the present comparative example 2 was 56%, and the reflectance of the metal plated electrode layer 31 of Example 2 was 4.7%. That is, after the black shielding layer 5 was added in Example 2, the reflectance of the metal plated electrode layer 31 was greatly reduced, and the edge bright line problem was solved.
[0054] The above detailed description is only a specific description of the feasible embodiments of the present application, and is not intended to limit the protection scope of the present application. Any equivalent embodiments or changes made without departing from the spirit of the present application shall be included in the protection scope of the present application.
Claims
1. A low-temperature start-up display panel, characterized in that, The device includes a backlight module, a first polarizer, a heating layer, and a display liquid crystal cell stacked together. The backlight module is located on the light-incident side of the display liquid crystal cell. The display liquid crystal cell includes a first substrate, a second substrate disposed opposite to the first substrate, and a liquid crystal layer disposed between the first substrate and the second substrate. The first substrate is located on the side away from the backlight module. The heating layer is disposed on the surface of the second substrate away from the liquid crystal layer. A metal-plated electrode layer with a predetermined width is provided on the heating layer near the edge of the surface of the second substrate. A black shielding layer is provided on the upper surface edge of the heating layer adjacent to the metal-plated electrode layer or on the lower surface edge of the heating layer away from the metal-plated electrode layer. The black shielding layer is located directly below the metal-plated electrode layer and covers the area where the metal-plated electrode layer overlaps with the first polarizer, for blocking light emitted by the backlight module and passing through the polarizer to illuminate the metal-plated electrode layer.
2. The low-temperature start-up display panel according to claim 1, characterized in that, The thickness of the metal-coated electrode layer is 0.5 μm to 1 μm, and the width of the metal-coated electrode layer is 3 mm to 4 mm.
3. The low-temperature start-up display panel according to claim 2, characterized in that, The backlight module includes a frame, a backlight source, a reflective film, a light guide plate, a diffuser film, and a brightness enhancement film. The frame has a groove structure, and the backlight source, the reflective film, the light guide plate, the diffuser film, the brightness enhancement film, and the first polarizer are sequentially stacked within the groove structure.
4. The low-temperature start-up display panel according to claim 3, characterized in that, The width of the concave edge of the groove structure is 0.5mm to 1.5mm.
5. The low-temperature start-up display panel according to claim 4, characterized in that, When the black masking layer is located between the heating layer and the metal-coated electrode layer, the thickness of the black masking layer is 0.05 μm to 0.08 μm.
6. The low-temperature start-up display panel according to claim 5, characterized in that, The black masking layer is a metal oxide black masking layer.
7. The low-temperature start-up display panel according to claim 4, characterized in that, When the black masking layer is located between the heating layer and the first polarizer, the thickness of the black masking layer is 1μm to 3μm.
8. The low-temperature start-up display panel according to claim 7, characterized in that, The black masking layer is a black masking layer for printing ink.
9. The low-temperature start-up display panel according to claim 1, characterized in that, The heating layer is an ITO heating layer.
10. The low-temperature start-up display panel according to any one of claims 1-9, characterized in that, A second polarizer is stacked on the surface of the first substrate away from the liquid crystal layer.