Display module and display panel

Abstract

The embodiment of the utility model discloses a display module and a display panel. The display module comprises a heating module and a liquid crystal box, the heating module comprises a heating layer and a heating net; the heating net is arranged between the liquid crystal box and the heating layer; the heating layer is in contact connection with the heating net, and the heating layer and the heating net can heat the liquid crystal box. Contact connection of the metal circuit of the heating net and the heating layer in the scheme can be equivalent to parallel connection, so that resistance of a heating module formed by the heating layer and the heating net is reduced. In addition, the hollow area of the heating net is large, and the loss rate of light penetrating through the heating net is low. Therefore, according to the scheme, the heating efficiency of the liquid crystal box can be improved on the basis that the display effect is not affected.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of display panels, and in particular to a display module and a display panel. Background Art

[0002] When exposed to low temperatures (-20 to -40°C), the viscosity of the liquid crystal increases, causing artifacts such as smearing during screen display, impacting normal operation. To address this issue, existing technologies incorporate a heating layer within the LCD screen to heat the display in low-temperature environments, bringing it to a normal display temperature.

[0003] Currently, heating layers typically use indium tin oxide (ITO) as a conductive layer to generate heat for the LCD. The ITO resistance and film thickness are inversely proportional. To improve the LCD's heating efficiency, the ITO film thickness must be increased. However, increasing ITO film thickness reduces the LCD's light transmittance, degrading the display quality. Utility Model Content

[0004] The embodiments of the present invention provide a display module and a display panel, so as to improve the heating efficiency of a liquid crystal cell without affecting the display effect.

[0005] In a first aspect, an embodiment of the present utility model provides a display module, which includes a heating module and a liquid crystal cell;

[0006] The heating module includes a heating layer and a heating network;

[0007] The heating network is arranged between the liquid crystal box and the heating layer;

[0008] The heating layer is in contact with the heating network, and the heating layer and the heating network can heat the liquid crystal box.

[0009] Optionally, the heating mesh includes a metal mesh, a first electrode frame and a second electrode frame;

[0010] The grid lines on the first side of the metal mesh are connected to the first electrode frame, the grid lines on the second side of the metal mesh are connected to the second electrode frame, and the first side and the second side of the metal mesh are not adjacent.

[0011] Optionally, the heating layer includes a plurality of heating units, and adjacent heating units are not connected in contact with each other;

[0012] The metal mesh includes a plurality of mesh pieces, and adjacent mesh pieces are not connected in contact with each other;

[0013] The first electrode frame includes a plurality of first electrode sub-frames, and the second electrode frame includes a plurality of second electrode sub-frames;

[0014] Each of the grid sheets is arranged between a heating unit and the liquid crystal box, the grid lines on the first side of each of the grid sheets are connected to a first electrode sub-frame, the grid lines on the second side of each of the grid sheets are connected to a second electrode sub-frame, and the first side and the second side of each of the grid sheets are not adjacent.

[0015] Optionally, the metal mesh has a grid shape of a quadrilateral.

[0016] Optionally, the shape of each grid of the metal mesh corresponds to the shape of a pixel electrode of the liquid crystal cell;

[0017] The vertical projection of each pixel electrode of the liquid crystal cell on the metal mesh is located in a hollow area of ​​each grid.

[0018] Optionally, the width of the grid lines of the metal mesh is 3um-5um.

[0019] Optionally, the heating layer includes a transparent conductive layer.

[0020] Optionally, the thickness of the heating layer is

[0021] Optionally, the display module further includes a flexible circuit board;

[0022] The flexible circuit board is connected to the heating network, and the flexible circuit board can supply power to the heating network.

[0023] In a second aspect, an embodiment of the present invention further provides a display panel, which includes the display module provided by any embodiment of the present invention.

[0024] The heating mesh of this embodiment of the utility model is a mesh structure composed of metal wiring, resulting in relatively low resistance. The heating layer and the heating mesh are in contact with each other, and the metal wiring of the heating mesh and the heating layer are connected in parallel, which reduces the resistance of the heating module formed by the heating layer and the heating mesh. Furthermore, the hollow area of ​​the heating mesh is relatively large, and the light loss rate through the heating mesh is relatively low. As a result, this solution can improve the heating efficiency of the liquid crystal cell without affecting the display effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 A kind of existing technology The temperature rise curve of the liquid crystal cell due to the thickness of the indium tin film;

[0027] Figure 2 A kind of existing technology The temperature rise curve of the liquid crystal cell due to the thickness of the indium tin film;

[0028] Figure 3 A light transmittance curve diagram of an indium tin film layer with different film thicknesses for light of different wavelengths provided by the prior art;

[0029] Figure 4 A light transmittance curve of an indium tin film with different film thicknesses for 550nm wavelength light provided by the prior art;

[0030] Figure 5 A schematic perspective structural diagram of a display module provided by an embodiment of the present utility model;

[0031] Figure 6 A schematic diagram of the structure of a heating network provided in an embodiment of the present utility model;

[0032] Figure 7 A schematic structural diagram of a heating layer provided in an embodiment of the present utility model;

[0033] Figure 8 A schematic structural diagram of a metal mesh provided in an embodiment of the present utility model;

[0034] Figure 9 A schematic diagram of the electrical connection structure of each grid sheet provided in an embodiment of the present utility model;

[0035] Figure 10 A schematic structural diagram of a metal mesh provided in an embodiment of the present utility model;

[0036] Figure 11 A schematic structural diagram of another metal mesh provided in an embodiment of the present utility model;

[0037] Figure 12 This is a schematic structural diagram of another metal mesh provided in an embodiment of the present utility model. DETAILED DESCRIPTION

[0038] In order to help those skilled in the art better understand the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0039] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are capable of distinguishing similar objects, and are not necessarily capable of describing a specific order or sequence. It should be understood that the numbers used in this way are interchangeable where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0040] Existing heating layers use an indium tin oxide film as a conductive layer to generate heat. This layer needs to be powered to convert electrical energy into heat. When heating a liquid crystal cell, the higher the heating efficiency of the heating layer, the better. Specifically, the more heat the heating layer generates in a short period of time, the better. According to the power formula, P = U² / R. When the supply voltage to the heating layer remains constant, the lower the resistance of the heating layer, the higher the heating efficiency.

[0041] Figure 1 A kind of existing technology The temperature rise curve of the liquid crystal box due to the thickness of the indium tin film layer. Figure 2 A kind of existing technology The temperature rise curve of the liquid crystal box due to the thickness of the indium tin film layer. Figure 3 The light transmittance curves of indium tin films with different film thicknesses for light of different wavelengths provided by the prior art are as follows: Figure 4 The light transmittance curves of indium tin films with different film thicknesses for 550nm wavelength light are provided in the prior art.

[0042] contrast Figure 1 and Figure 2It can be seen that the resistance and thickness of the ITO film are inversely proportional (i.e., the smaller the resistance of the ITO film, the thicker the ITO film). Therefore, it can be seen that the heating efficiency of the heating layer can be improved by increasing the thickness of the ITO film (i.e., reducing the resistance of the ITO film). However, under the existing process, the maximum thickness of the ITO film can be The surface resistance of the indium tin oxide film layer is reduced to 10 ohms.

[0043] The average wavelength of the light source of the LCD screen is generally 550nm. Figure 3 It can be seen that the thickness is selected The indium tin oxide film layer on the left and right has the highest transmittance to 550nm wavelength light. Figure 4 It can be seen that as the thickness of the ITO film increases, the light transmittance of the display decreases, thereby causing a loss of display brightness and a reduction in display effect.

[0044] In view of the above problems, an embodiment of the present invention provides a structural diagram of a display module, which can improve the heating efficiency of the liquid crystal box without affecting the display effect. Figure 5 A perspective structural diagram of a display module provided by an embodiment of the present utility model is shown in FIG. Figure 6 This is a schematic diagram of the structure of a heating network provided by an embodiment of the present utility model. Figure 5 and Figure 6 As shown, the display module includes a heating module 110 and a liquid crystal box 120;

[0045] The heating module 110 includes a heating layer 111 and a heating net 112 ; the heating net 112 is disposed between the liquid crystal cell 120 and the heating layer 111 ;

[0046] The heating layer 111 and the heating mesh 112 are in contact and connected, and the heating layer 111 and the heating mesh 112 can heat the liquid crystal box 120 .

[0047] The heating mesh 112 is a mesh structure composed of metal lines with relatively low resistance. The heating layer 111 and the heating mesh 112 are in contact with each other, and the metal lines of the heating mesh 112 and the heating layer 111 are connected in parallel, which reduces the resistance of the heating module 110 formed by the heating layer 111 and the heating mesh 112. Furthermore, the hollow area of ​​the heating mesh 112 is relatively large, and the light loss rate passing through the heating mesh 112 is relatively low. Therefore, this solution can improve the heating efficiency of the liquid crystal cell 120 without affecting the display effect.

[0048] For example, the following table compares the heating parameters of the existing ITO heating layer architecture and the heating module 110 architecture of this solution at a voltage of 12V.

[0049]

[0050] As can be seen from the above table, the heating module 110 formed by the heating layer 111 and the heating mesh 112 reduces the surface resistance of the heating module 110 and improves the heating efficiency of the heating module 110 on the liquid crystal box 120 without affecting the display effect.

[0051] On the basis of the above embodiment, optionally, continue to refer to Figure 6 The heating mesh 112 includes a metal mesh 1121, a first electrode frame 1122 and a second electrode frame 1123; the grid lines on the first side of the metal mesh 1121 are connected to the first electrode frame 1122, and the grid lines on the second side of the metal mesh 1121 are connected to the second electrode frame 1123, and the first side and the second side of the metal mesh 1121 are not adjacent.

[0052] Among them, the grid lines on the first side of the metal mesh 1121 are connected to the first electrode frame 1122, and the grid lines on the second side of the metal mesh 1121 are connected to the second electrode frame 1123, so that the first electrode frame 1122 and the second electrode frame 1123 can simultaneously power multiple grid lines, so that multiple grid lines and the heating layer 111 in contact with each grid line are energized and generate heat at the same time, making the heat generation of the metal mesh 1121 and the heating layer 111 in contact with the metal mesh 1121 more uniform, thereby making the heating of the liquid crystal box 120 more uniform.

[0053] In addition, the first side and the second side of the metal mesh 1121 are not adjacent to each other, which can prevent the first electrode frame 1122 from being directly electrically connected to the second electrode frame 1123, thereby preventing the metal mesh 1121 from being short-circuited, so that the metal mesh 1121 cannot heat the liquid crystal box 120.

[0054] Based on the above embodiment, optionally, Figure 7 This is a schematic structural diagram of a heating layer provided by an embodiment of the utility model. Figure 8 This is a schematic diagram of the structure of a metal mesh provided by an embodiment of the present utility model. Figure 7 and Figure 8As shown, the heating layer 111 includes a plurality of heating units 1111, and adjacent heating units 1111 are not in contact with each other; the metal mesh 1121 includes a plurality of grid sheets 11210, and adjacent grid sheets 11210 are not in contact with each other; the first electrode frame 1122 includes a plurality of first electrode sub-frames 11220, and the second electrode frame 1123 includes a plurality of second electrode sub-frames 11230; each grid sheet 11210 is arranged between a heating unit 1111 and the liquid crystal box 120, the grid lines on the first side of each grid sheet 11210 are connected to a first electrode sub-frame 11220, and the grid lines on the second side of each grid sheet 11210 are connected to a second electrode sub-frame 11230, and the first side and the second side of each grid sheet 11210 are not adjacent.

[0055] Among them, due to the influence of the conductive distance, uneven heat transfer will cause differences in the heating time of different areas of the liquid crystal box 120. To reduce the temperature difference between different areas of the liquid crystal box 120, the display area of ​​the liquid crystal box 120 can be divided into equal parts according to the size of the liquid crystal box 120 and heated in different areas.

[0056] Specifically, multiple grid sheets 11210 corresponding to different positions of the liquid crystal box 120 and the heating units 1111 corresponding to each grid sheet 11210 are powered on to generate heat at the same time, which can make the heat generation of the grid sheet 11210 and each heating unit 1111 connected to the grid sheet 11210 more uniform, thereby making the heating of different positions of the large-sized liquid crystal box 120 more uniform.

[0057] In addition, the entire heating layer 111 and the metal mesh 1121 can be separated by etching according to the divided heating areas to obtain heating units 1111 and mesh sheets 11210 corresponding to each heating area.

[0058] also, Figure 9 A schematic diagram of the electrical connection structure of each grid piece 11210 provided in an embodiment of the present utility model is shown as follows: Figure 9 As shown, each grid sheet 11210 is connected in parallel to the same power supply via the connected first electrode sub-frame 11220 and second electrode sub-frame 11230. Thus, when the power supply supplies power to each grid sheet 11210, the voltages of the grid sheets 11210 and heating units 1111 corresponding to each heating area are consistent, and the amount of heat generated by the grid sheets 11210 and heating units 1111 corresponding to each heating area is the same, thereby causing the temperatures of the heating areas to rise synchronously.

[0059] Based on the above embodiment, optionally, the mesh shape of the metal mesh 1121 is a quadrilateral.

[0060] For example, Figure 10 This is a schematic diagram of the structure of a metal mesh provided in an embodiment of the utility model. Figure 10 The mesh shape of the middle metal mesh 1121 is a grid shape. Figure 11 This is a schematic diagram of the structure of another metal mesh provided in an embodiment of the present utility model. Figure 11 The mesh shape of the middle metal mesh 1121 is diamond-shaped.

[0061] It should be noted that the vertical projection of each pixel electrode of the liquid crystal cell 120 on the metal mesh 1121 is located in the hollow area of ​​each grid.

[0062] Based on the above embodiment, optionally, Figure 12 This is a schematic diagram of the structure of another metal mesh provided by the embodiment of the present utility model. Figure 12 As shown, the shape of each grid of the metal mesh 1121 corresponds to the shape of the pixel electrode of the liquid crystal cell 120; the vertical projection of each pixel electrode of the liquid crystal cell 120 on the metal mesh 1121 is located in the hollow area of ​​each grid.

[0063] The shape of each grid of the metal mesh 1121 is arranged to correspond to the shape of the pixel electrode of the liquid crystal cell 120 , thereby avoiding fringe interference between each grid and the pixel electrode, thereby improving the display effect of the display module.

[0064] In addition, the mesh lines of the metal mesh 1121 are made of copper to reduce the resistance of the metal mesh 1121 and thereby increase the conductivity of the metal mesh 1121 , thereby improving the heating efficiency of the liquid crystal cell 120 .

[0065] Based on the above embodiment, optionally, the width of the grid lines of the metal mesh 1121 is 3 um-5 um.

[0066] Among them, extremely fine metal grid lines can be formed on the glass surface through the yellow light process. The width of the grid lines is 3um-5um, so that the black matrix can block the grid lines.

[0067] Based on the above embodiment, optionally, the heating layer 111 includes a transparent conductive layer.

[0068] The transparent conductive layer is a thin film that is both conductive and highly transparent in the visible light range. Its main function is to ensure light transmission while enabling electron conduction and converting electrical energy into heat energy, thereby heating the liquid crystal cell 120.

[0069] On the basis of the above embodiment, optionally, continue to refer to Figure 3 , the thickness of the heating layer 111 is

[0070] Among them, the average wavelength of the light source of the LCD screen is generally 550nm. Figure 3 It can be seen that the thickness is selected The indium tin oxide film has the highest transmittance for light with a wavelength of 550nm.

[0071] Based on the above embodiment, optionally, the display module further includes a flexible circuit board; the flexible circuit board is connected to the heating network 112 , and the flexible circuit board can supply power to the heating network 112 .

[0072] Among them, the flexible circuit board supplies power to the heating network 112, the heating network 112 is connected in parallel with the heating layer 111, and the heating layer 111 obtains electrical energy while transmitting power to the heating layer 111. When the heating layer 111 and the heating network 112 are energized, they can convert electrical energy into thermal energy to heat the liquid crystal box 120.

[0073] An embodiment of the present invention further provides a display panel, which includes the display module provided by any embodiment of the present invention, and thus has the beneficial effects of the display module provided by any embodiment of the present invention, which will not be described in detail.

[0074] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in this utility model can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of this utility model can be achieved. This is not limited herein.

[0075] The above specific embodiments do not limit the scope of protection of this utility model. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model shall be included within the scope of protection of this utility model.

Claims

1. A display module, characterized in that: Including heating module and liquid crystal box; The heating module includes a heating layer and a heating network; The heating network is arranged between the liquid crystal box and the heating layer; The heating layer is in contact with the heating network, and the heating layer and the heating network can heat the liquid crystal box.

2. The display module according to claim 1, wherein: The heating network includes a metal network, a first electrode frame and a second electrode frame; The grid lines on the first side of the metal mesh are connected to the first electrode frame, the grid lines on the second side of the metal mesh are connected to the second electrode frame, and the first side and the second side of the metal mesh are not adjacent.

3. The display module according to claim 2, wherein: The heating layer includes a plurality of heating units, and adjacent heating units are not connected in contact with each other; The metal mesh includes a plurality of mesh pieces, and adjacent mesh pieces are not connected in contact with each other; The first electrode frame includes a plurality of first electrode sub-frames, and the second electrode frame includes a plurality of second electrode sub-frames; Each of the grid sheets is arranged between a heating unit and the liquid crystal box, the grid lines on the first side of each of the grid sheets are connected to a first electrode sub-frame, the grid lines on the second side of each of the grid sheets are connected to a second electrode sub-frame, and the first side and the second side of each of the grid sheets are not adjacent.

4. The display module according to claim 2, wherein: The metal mesh has a quadrilateral shape.

5. The display module according to claim 2, wherein: The shape of each grid of the metal mesh corresponds to the shape of the pixel electrode of the liquid crystal cell; The vertical projection of each pixel electrode of the liquid crystal cell on the metal mesh is located in a hollow area of ​​each grid.

6. The display module according to claim 2, wherein: The width of the grid lines of the metal mesh is 3um-5um.

7. The display module according to claim 1, wherein: The heating layer includes a transparent conductive layer.

8. The display module according to claim 1, wherein: The thickness of the heating layer is 9. The display module according to claim 1, wherein: Also includes flexible circuit boards; The flexible circuit board is connected to the heating network, and the flexible circuit board can supply power to the heating network.

10. A display panel, characterized in that: A display module comprising any one of claims 1 to 9.

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