Display module, display screen and display device

Abstract

This application provides a display module, a display screen, and a display device, relating to the field of optics. The display module includes a dimming layer with different transmittances; a dimming drive unit electrically connected to the dimming layer for driving the dimming layer to a target transmittance; the target transmittance is any of the different transmittances; and a transparent display panel connected to and parallel to the dimming layer, the transparent display panel displaying pixel brightness corresponding to the target transmittance. When the dimming layer is at different transmittances, the transparent display panel displays pixel brightness corresponding to the transmittance, thereby achieving a balance between transparency and display effect in the display module, providing a better user experience.

Description

Technical Field

[0001] This application relates to the field of optics, and more specifically, to a display module, a display screen, and a display device. Background Technology

[0002] Currently, the transparency and display effects of transparent screens are affected by light. For example, transparent screens have better display effects in low-light environments and better transparency effects in bright-light environments.

[0003] However, due to environmental factors, transparent screens cannot achieve a good balance between display effect and transparency effect, resulting in neither display effect nor transparency effect meeting the actual needs of users and affecting the user experience. Summary of the Invention

[0004] In view of this, this application aims to provide a display module, display screen, and display device to achieve a better balance between the transparency effect and display effect of the transparent screen, so that the display module can meet the user's needs for transparency effect and display effect in different scenarios and improve the user experience.

[0005] In a first aspect, embodiments of this application provide a display module, comprising: a dimming layer having different transmittances; a dimming driving unit electrically connected to the dimming layer for driving the dimming layer to a target transmittance; the target transmittance being any of the different transmittances; and a transparent display panel connected to and parallel to the dimming layer, the transparent display panel being used to display pixel brightness corresponding to the target transmittance.

[0006] In this embodiment, the transparent display panel is used to display pixel brightness corresponding to the target transmittance of the dimming layer. When the dimming layer is driven to the target transmittance required by the user, the transparent display panel can display the corresponding pixel brightness. Through the joint work of the transparent display panel and the dimming layer, the display module can present a better transparency effect or display effect, thereby enabling the display module to meet the user's needs for transparency effect or display effect in different scenarios and improve the user experience.

[0007] In one embodiment, the display module further includes a display panel driving unit, electrically connected to the transparent display panel, for controlling the brightness of pixels of each color in the transparent display panel.

[0008] In this embodiment of the application, the brightness of each color pixel in the transparent display panel can be controlled by the display panel driving unit, so that the transparent display panel can provide pixel brightness that satisfies the transparency effect or the display effect.

[0009] In one embodiment, when the target transmittance is at its highest transmittance, the pixel brightness in the transparent display panel is less than or equal to a preset brightness threshold.

[0010] In this embodiment, when the dimming layer is at its highest transmittance, it exhibits superior transparency. At this point, the pixel brightness in the transparent display panel can be set to be less than or equal to a preset brightness threshold. This prevents excessively high brightness from individual color pixels in the transparent display panel from affecting the transparency. Therefore, by adjusting the pixel brightness in the transparent display panel to less than or equal to the preset brightness threshold when the target transmittance is at its highest, the display module can achieve a better transparency effect.

[0011] In one embodiment, when the target transmittance is at its lowest transmittance, the pixel brightness in the transparent display panel is: the highest luminous brightness of the red, green, and blue pixels under the condition of ensuring white balance.

[0012] In this embodiment, when the transmittance of the dimming layer is at its lowest possible level, the impact of external light on the display effect can be effectively reduced, thus enabling the transparent display panel to display better. Maintaining white balance for the pixels in the transparent display panel compensates for the displayed image, providing a superior picture quality. When the red, green, and blue pixels are at their highest luminous brightness under white balance conditions, optimal color effects can be provided, resulting in a better display. Therefore, by coordinating the lowest transmittance of the dimming layer with the brightness of each pixel in the transparent display panel, a better display effect can be provided to the user.

[0013] In one embodiment, the target transmittance is an intermediate transmittance, which is located between the highest and lowest transmittance of the dimming layer; the white pixels in the transparent display panel emit light and the brightness of the emitted light satisfies a preset relationship between the brightness of the white pixels and the intermediate transmittance.

[0014] In this embodiment, when the dimming layer is at its intermediate transmittance, external light can negatively impact the display effect. Therefore, emitting light from the white pixels in the transparent display panel can, to some extent, counteract the influence of external light and improve the display effect. By ensuring that the brightness of the white pixels meets the preset relationship between the brightness of the white pixels and the intermediate transmittance, different brightness levels of the white pixels can be set according to different transmittances of the dimming layer. This avoids the effect of excessively high white pixel brightness affecting the display effect, and also avoids the effect of excessively low white pixel brightness causing excessive interference from external light. Thus, by ensuring that the intermediate transmittance of the dimming layer and the brightness of the white pixels in the transparent display panel meet the preset relationship, the display module can achieve a superior display effect.

[0015] In one embodiment, the display module further includes: a transparent touch layer connected to and parallel to the transparent display panel, the transparent touch layer being used to receive control commands; and a touch driving unit electrically connected to the transparent touch layer and the dimming driving unit, the touch driving unit being used to control the dimming driving unit based on the control commands, so that the dimming driving unit drives the dimming layer to the target transmittance.

[0016] In this embodiment, by setting a transparent touch layer and a touch driving unit, the display module can be controlled by touch, which is convenient for users and improves the user experience.

[0017] Secondly, embodiments of this application provide a display screen, including: a display module as described in any of the first aspects.

[0018] In one embodiment, the display screen further includes a first protective glass, which is connected to and parallel to the transparent display panel.

[0019] Thirdly, embodiments of this application provide a display device, including: a display screen as described in any of the second aspects.

[0020] In one embodiment, the display device further includes a second protective glass, which is connected to and arranged parallel to the dimming layer of the display module in the display screen.

[0021] In one embodiment, a spacer layer is provided between the second protective glass and the display screen; the spacer layer is sealed with a frame or filled with a transparent optical adhesive.

[0022] In one embodiment, the display device is a vehicle window.

[0023] Other features and advantages of this disclosure will be set forth in the following description, or some features and advantages may be inferred from the description or determined without doubt, or may be learned by practicing the techniques described above.

[0024] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments of this application are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1This is a schematic diagram of the structure of a display module provided in one embodiment of this application;

[0027] Figure 2 A graph showing the relationship between light transmittance and pixel brightness is provided in one embodiment of this application;

[0028] Figure 3 This is a control schematic diagram of a display module provided in an embodiment of this application;

[0029] Figure 4 A schematic diagram of the structure of a display screen provided in an embodiment of this application;

[0030] Figure 5 This is a schematic diagram of the structure of a display device filled with transparent optical adhesive provided in an embodiment of this application;

[0031] Figure 6 A schematic diagram of the structure of a display device with a sealed frame provided in an embodiment of this application.

[0032] Icons: Dimming layer 110; Transparent display panel 120; Dimming drive unit 130; Display panel drive unit 140; Processor 150; Transparent touch layer 160; Touch drive unit 170; First protective glass 210; Second protective glass 310; Transparent optical adhesive 320; Adhesive frame 330. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0034] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of a display module provided in an embodiment of this application.

[0035] The display module includes: a dimming layer 110, a transparent display panel 120, and a dimming drive unit 130.

[0036] The dimming layer 110 has different light transmittance.

[0037] In this embodiment, the dimming layer 110 can be a dyed liquid crystal dimming layer. The dyed liquid crystal dimming layer includes liquid crystal molecules and dye molecules. Applying a voltage to the dyed liquid crystal dimming layer can cause the liquid crystal molecules in the dyed liquid crystal dimming layer to deflect, and at the same time drive the dye molecules to deflect, changing the visible light transmittance, thereby realizing the dimming function, that is, realizing that the dimming layer 110 has different transmittances.

[0038] In some other embodiments, the dimming layer 110 can also be other dimming devices with adjustable transmittance, such as electronically controlled smart dimming film, which can be selected reasonably according to needs.

[0039] In this embodiment, the transmittance range of the dimming layer 110 includes a maximum transmittance, a minimum transmittance, and an intermediate transmittance. The maximum and minimum transmittances are determined by the performance of the dimming layer 110, while the intermediate transmittance lies between the maximum and minimum transmittances. For example, the maximum transmittance is 60%, the minimum transmittance is 1%, and the intermediate transmittance is between 1% and 60%. It should be understood that the above is merely an example, and the actual transmittance is determined by the transmittance of the selected dimming layer 110.

[0040] It should be noted that excessively high minimum transmittance will reduce the display effect of the display module when it is at its minimum transmittance. Therefore, when selecting the dimming layer 110, a dimming layer 110 with a minimum transmittance of no more than 3% can be selected.

[0041] A transparent display panel 120, connected to and parallel to the dimming layer 110, is used to display pixel brightness corresponding to a target light transmittance. For example, the dimming layer 110 and the transparent display panel 120 can be bonded together with transparent optical adhesive.

[0042] In this embodiment, the transparent display panel 120 contains pixels of different colors, including red pixels, green pixels, blue pixels and white pixels. Each pixel can emit light, and each pixel emits light with a different brightness. The sum of the brightness of all pixels is equal to the total brightness of the transparent display panel 120.

[0043] When the display module is in operation, the transparent display panel 120 can display corresponding pixel brightness according to the light transmittance of the dimming layer 110, thereby achieving different transparency effects and / or display effects. For example, when the light transmittance of the dimming layer 110 is high, the brightness of each color pixel in the transparent display panel 120 is low or does not emit light, in order to achieve a better transparency effect. Alternatively, when the light transmittance of the dimming layer 110 is low, the brightness of each color pixel in the transparent display panel 120 is reasonably matched to achieve better color gamut, contrast, and other display effects.

[0044] In this embodiment, the display panel has transparent properties. The transparent display panel 120 can be a WOLED (White Organic Light Emitting Diode) transparent display panel 120, an LCD (Liquid Crystal Display) transparent display panel 120, or the like.

[0045] The dimming drive unit 130 is electrically connected to the dimming layer 110 and is used to drive the dimming layer 110 to the target transmittance.

[0046] In this embodiment, when the dimming layer 110 is a colored liquid crystal dimming layer 110, the dimming driving unit 130 can apply a voltage to the dimming layer 110 to change the transmittance of the dimming layer 110. When the dimming layer 110 is another type of dimming layer 110, the dimming driving unit 130 can drive the dimming layer 110 to adjust from the current transmittance to another transmittance.

[0047] In one embodiment, the display module further includes a display panel driving unit 140.

[0048] In this embodiment, the display panel driving unit 140 is electrically connected to the transparent display panel 120 and is used to control the brightness of each color pixel in the transparent display panel 120.

[0049] In one embodiment, the display module further includes a processor 150.

[0050] In this embodiment, the processor 150 can be an integrated circuit chip with signal processing capabilities. The processor 150 can be a general-purpose processor, including a CPU (Central Processing Unit), NP (Network Processor), etc.; it can also be a digital signal processor, application-specific integrated circuit, off-the-shelf programmable gate array or other programmable logic device, discrete gate or transistor logic device, or discrete hardware component. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor can be a microprocessor or any conventional processor.

[0051] In this embodiment, the processor 150 is connected to the display panel driving unit 140 and the dimming driving unit 130, respectively. The processor 150 is used to send control commands to the display panel driving unit 140 and the dimming driving unit 130, respectively, to control the dimming driving unit 130 to drive the dimming layer 110 to the target transmittance, and to control the display panel driving unit 140 to make the transparent display panel 120 display pixel brightness corresponding to the target transmittance.

[0052] In some embodiments, the display module may further include a communication module. The communication module may be a Bluetooth module, an infrared module, etc. The communication module receives control commands, causing the display panel driving unit 140 and the dimming driving unit 130 to execute according to the control commands, thereby enabling the dimming layer 110 to reach the target transmittance and causing the transparent display panel 120 to display pixel brightness corresponding to the target transmittance.

[0053] Please see Figure 2 , Figure 2This is a graph showing the relationship between light transmittance and pixel brightness according to an embodiment of this application. Wherein, W represents a white pixel, R represents a red pixel, G represents a green pixel, B represents a blue pixel, and T represents light transmittance.

[0054] In one embodiment, when the dimming layer 110 is at its highest transmittance, the pixel brightness in the transparent display panel 120 is less than or equal to a preset brightness threshold.

[0055] In this embodiment, when the dimming layer 110 is at its highest transmittance, the dimming layer 110 can have a better light transmission effect. At this time, the transparent display panel 120 can be adjusted to less than or equal to the preset brightness threshold to reduce or avoid the influence of pixel light emission in the transparent display panel 120. Thus, the entire display module can have a better transparency effect.

[0056] The preset brightness threshold can be 0 or a small value that does not affect the visual effect. When the preset brightness threshold is 0, the transparent display panel 120 is in an off state, at which point the brightness of all pixels in the transparent display panel 120, including white, blue, red, and green pixels, is 0. When the preset brightness threshold is a small value, the brightness of each pixel in the transparent display panel 120 is reduced to a brightness level that does not affect the visual effect. The specific value of the preset brightness threshold can be set by engineers or users, but is not a limitation.

[0057] In one embodiment, when the target transmittance of the dimming layer 110 is at its lowest transmittance, the pixel brightness in the transparent display panel 120 can be the highest luminous brightness of the red, green, and blue pixels under the condition of ensuring white balance.

[0058] In this embodiment, when the dimming layer 110 is at its lowest transmittance, the display module can be made to be unaffected by external light to a certain extent, allowing it to fully display color effects. Therefore, white pixels can remain unlit, while the brightness of red, green, and blue pixels is the highest luminous brightness under the condition of maintaining white balance.

[0059] Understandably, red, green, and blue pixels must first achieve white balance. Once white balance is achieved, the color temperature can be adjusted to make the colors in the image more closely resemble those perceived by the human eye, thus providing a better display effect. For example, such as... Figure 2As shown, under white balance conditions, blue pixels account for 10% of the total luminance, red pixels account for 30%, and green pixels account for 60%. If the total luminance is 150 nits, then blue pixels account for 15 nits, red pixels for 45 nits, and green pixels for 90 nits. It is understood that the above white balance conditions are merely examples; different display screens require different white balance conditions, which can be set appropriately according to needs. For example, when displaying a vibrant image containing pure red, pure green, and pure blue, the white balance conditions are red pixel:green pixel:blue pixel = 2:7:1, with red pixel luminance at 30 nits, green pixel luminance at 105 nits, and blue pixel luminance at 15 nits. Therefore, the above example should not be construed as limiting this application. Related content on white balance can be found in existing technologies and will not be elaborated upon here.

[0060] In one embodiment, when the transmittance of the dimming layer 110 is at the intermediate brightness, the pixel brightness in the display panel includes: the highest luminous brightness of the red, green and blue pixels under the condition of ensuring white balance, and the luminous brightness of the white pixels satisfies the preset relationship between the luminous brightness of the white pixels and the intermediate transmittance.

[0061] In this embodiment, since the dimming layer 110 is at intermediate brightness, the display effect of the display module is affected by ambient light, including color gamut and contrast. Increasing the brightness of the white pixels can offset the color reduction effect and the reduction caused by ambient light compared to daylight dilution. Therefore, appropriately increasing the brightness of the white pixels helps improve the display effect. The ability of white pixels to offset the effects of ambient light is explained in existing technologies.

[0062] The red, green, and blue pixels are designed to provide better color gamut and contrast. Therefore, the luminance of the red, green, and blue pixels is set to the highest possible luminance under white balance conditions to ensure optimal color gamut and contrast.

[0063] In one embodiment, the preset relationship can be:

[0064]

[0065] Where T is the intermediate transmittance, T max For the highest light transmittance, T min Where n is the minimum transmittance, n is the current brightness level number (starting from 0), N is the total number of brightness levels, and W is the brightness of the white pixel. max This represents the highest brightness of the white pixel.

[0066] In this embodiment, the intermediate transmittance between the highest and lowest transmittance can be divided into multiple levels, so that the dimming layer 110 can be adjusted to the corresponding target transmittance according to the different levels, and the white pixels in the display panel can display the corresponding brightness.

[0067] It should be noted that the human eye's threshold for luminance difference resolution increases with the increase of the field of view brightness. Therefore, in this embodiment, ensuring that the transmittance follows a linear growth relationship can effectively meet the visual requirements of the human eye under different luminance difference resolution thresholds. The field of view brightness of the display module is typically between 0 nit and 400 nit. Experiments have shown that setting the luminance of white pixels using a quadratic function yields better segmentation effects. Therefore, a corresponding segment of white pixel luminance can be set for each field of view brightness, ensuring good color performance at each segment, i.e., each brightness level. Thus, in this embodiment, the transmittance of the dimming layer 110 and the brightness of the white pixels are set to satisfy a corresponding relationship between different levels, thereby providing better display effects and meeting the visual requirements of the human eye under different luminance difference resolution thresholds.

[0068] In this embodiment, the transparent display panel 120 displays pixel brightness corresponding to the target transmittance of the dimming layer 110. Thus, when the dimming layer 110 is driven to the target transmittance required by the user, the transparent display panel 120 can display pixel brightness corresponding to the transparent effect or the display effect, thereby achieving any choice between the transparent effect, the display effect, or both, to meet the user's needs and improve the user experience.

[0069] Please see Figure 3 , Figure 3 This is a schematic diagram of the control of the display module provided in an embodiment of this application.

[0070] In one embodiment, the display module further includes a transparent touch layer 160 and a touch driving unit 170.

[0071] like Figure 3 As shown, the transparent touch layer 160 is connected to and parallel to the transparent display panel 120. For example, the transparent touch layer 160 and the transparent display panel 120 can be bonded together using transparent optical adhesive.

[0072] In this embodiment, the transparent touch layer 160 can be a transparent capacitive touch layer, a transparent optical touch layer, etc., but this is not a limitation. The structure of the transparent capacitive touch layer, transparent optical touch layer, etc., can refer to the prior art, and will not be described in detail here.

[0073] In this embodiment, a transparent touch layer 160 is used to control the dimming layer 110 and the transparent display panel 120. Since the transparent touch layer 160 is transparent, the display template can still have good transparency when controlled by touch.

[0074] In this embodiment, the control command can be generated by clicking or swiping an object that the touch layer can perceive and recognize, such as a hand or a stylus, or it can be received by other command sending devices.

[0075] The touch driving unit 170 is electrically connected to the transparent touch layer 160 and the dimming driving unit 130, respectively. The touch driving unit 170 is used to control the dimming driving unit 130 based on control commands, so that the dimming driving unit 130 drives the dimming layer 110 to the target transmittance, and at the same time makes the transparent display panel 120 display the pixel brightness corresponding to the target transmittance.

[0076] In this embodiment, the memory connected to the touch driving unit 170 can store preset control commands and preset execution methods corresponding to each control command. The preset control commands include control commands corresponding to the highest transmittance, control commands corresponding to the lowest transmittance, and control commands corresponding to intermediate transmittance. After receiving the control command from the transparent touch layer 160, the touch driving unit 170 controls the dimming layer 110 and the transparent display panel 120 to execute according to the execution method corresponding to the control command, including controlling the dimming layer 110 to be at the target transmittance corresponding to the control command, and causing the transparent display panel 120 to display pixel brightness corresponding to the target transmittance. For example, after receiving the control command corresponding to the highest transmittance, the dimming driving unit 130 drives the dimming layer 110 to be at the highest transmittance, and the display panel driving unit 140 drives the transparent display panel 120 to turn off. It is understood that the relationship between the target transmittance and the control command mentioned above is only an example. The preset touch command and the corresponding execution method can be set to other methods, such as mode 1, mode 2... mode N, etc., or it can be set to landscape mode, video mode, self-named mode, etc. The relationship between transmittance and pixel brightness in each mode can be set according to the needs of users or engineers.

[0077] The way the touch driver unit 170 receives control commands can refer to existing touch technologies.

[0078] In this embodiment, the transparent touch layer 160 and the touch driving unit 170 enable the display module to be controlled via touch, making it easier for users to use and improving the user experience.

[0079] Please see Figure 4 , Figure 4 This application provides a schematic diagram of the structure of a display screen.

[0080] Based on the same inventive concept, this application provides a display screen, including the display module in the above embodiments.

[0081] The display screen also includes a first protective glass 210, which is connected to and parallel to the transparent display panel 120. For example, the first protective glass 210 and the transparent display panel 120 can be connected by transparent optical adhesive.

[0082] In this embodiment, when using a transparent touch capacitive layer, the transparent touch capacitive layer can be disposed between the transparent display panel 120 and the first protective glass 210, and the transparent touch capacitive layer can be bonded to the first protective glass 210 and the transparent display panel 120 respectively using transparent optical adhesive.

[0083] Please see Figure 5 , Figure 5 This is a schematic diagram of the structure of a display device provided in an embodiment of this application.

[0084] Based on the same inventive concept, this application provides a display device, which includes the display screen in the above embodiments.

[0085] In one embodiment, the display device may further include a second protective glass 310. The second protective glass 310 is connected to and arranged parallel to the dimming layer 110 of the display module in the display screen. For example, the second protective glass 310 and the dimming layer 110 may be bonded together with a transparent optical adhesive.

[0086] Please also refer to Figure 5 and Figure 6 , Figure 5 For display devices that use transparent optical adhesive to fill the spacer layer, Figure 6 For a display device using a frame 330 to seal the spacer layer. In some embodiments, after the display device is formed by connecting the second protective glass 310 and the display screen, there may be a spacer layer, such as a spacer air layer or a spacer vacuum layer. The spacer layer can be filled with transparent optical adhesive 320 or sealed with a frame 330 to fix the interior of the display device, thereby improving the stability, impact resistance, and waterproof and dustproof effect of the display device.

[0087] In one embodiment, the display device can be a vehicle window.

[0088] The display device in this embodiment can be applied to vehicle windows. It should be understood that the vehicle window described in this embodiment is not a window in the narrow sense of a vehicle, but rather refers to the windows of all means of transportation. For example, a vehicle window can be a window of a train, bus, private car, airplane, or ship. Using this transparent display device allows users to easily observe the external environment through the window, and also facilitates viewing the content displayed on the device.

[0089] Furthermore, the display device in this embodiment can also be applied to devices such as computers, televisions, and display boards, and this application does not impose any restrictions on this.

[0090] In the embodiments provided in this application, it should be understood that the disclosed dimming drive unit 130, display panel drive unit 140, processor 150, and touch drive unit, as well as the relationship between the target transmittance and the display panel and the corresponding control method, can be implemented in other ways. The device embodiments described above are merely illustrative; for example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed.

[0091] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A display module, characterized in that, include: The dimming layer has different light transmittance; A dimming drive unit, electrically connected to the dimming layer, is used to drive the dimming layer to the target transmittance. The target transmittance is any of the different transmittances; A transparent display panel is connected to and parallel to the dimming layer, and the transparent display panel is used to display the pixel brightness corresponding to the target light transmittance; When the target transmittance is the intermediate transmittance, the intermediate transmittance is located between the highest and lowest transmittance of the dimming layer, and the white pixels in the transparent display panel emit light and the light emission brightness satisfies the preset relationship between the light emission brightness of the white pixels and the intermediate transmittance. The preset relationships include: in, T The intermediate transmittance is... T max For the highest light transmittance, T min To achieve the lowest light transmittance, n This is the current brightness level ordinal number, starting from 0. N This represents the total number of brightness levels. W The brightness of the white pixel. W max This represents the highest brightness of the white pixel.

2. The display module according to claim 1, characterized in that, The display module further includes a display panel driving unit, which is electrically connected to the transparent display panel and is used to control the brightness of each color pixel in the transparent display panel.

3. The display module according to claim 1, characterized in that, When the target transmittance is at its highest level, the pixel brightness in the transparent display panel is less than or equal to a preset brightness threshold.

4. The display module according to claim 1, characterized in that, When the target transmittance is at its lowest, the pixel brightness in the transparent display panel is: the highest luminous brightness of the red, green, and blue pixels under the condition of ensuring white balance.

5. The display module according to any one of claims 1-4, characterized in that, The display module also includes: A transparent touch layer is connected to and parallel to the transparent display panel, and the transparent touch layer is used to receive control commands; A touch driving unit is electrically connected to the transparent touch layer and the dimming driving unit respectively. The touch driving unit is used to control the dimming driving unit based on the control command, so that the dimming driving unit drives the dimming layer to the target transmittance, and at the same time makes the transparent display panel display the pixel brightness corresponding to the target transmittance.

6. A display screen, characterized in that, include: The display module as described in any one of claims 1-5.

7. The display screen according to claim 6, characterized in that, Also includes: The first protective glass is connected to and parallel to the transparent display panel.

8. A display device, characterized in that, include: The display screen as described in claim 6 or 7; The second protective glass is connected to and parallel to the dimming layer of the display module in the display screen.

9. The display device according to claim 8, characterized in that, The second protective glass has a spacer layer between it and the display screen; the spacer layer is sealed with a frame or filled with transparent optical adhesive.

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