Display device and electronic device

Abstract

The present application provides a display device and an electronic device. The display device includes a display screen, a contrast enhancement module, and a controller; the display screen has a plurality of pixels; the contrast enhancement module is disposed on one side of the display screen, the contrast enhancement module has a plurality of light-transmitting units, each light-transmitting unit is disposed corresponding to one pixel, and different light-transmitting units correspond to different pixels, and the light-transmitting unit can exhibit different light transmittance under the control of a control signal; when the display screen displays a preset picture and the contrast when the display screen displays the preset picture is less than a preset contrast, the controller is configured to issue a control signal to adjust the light transmittance of the light-transmitting unit in the contrast enhancement module, so that the contrast of the display device displaying the preset picture after the light transmittance is adjusted is greater than or equal to the preset contrast. The display device provided by the embodiment of the present application has a relatively high contrast when displaying a picture.

Description

Technical Field

[0001] This application relates to the field of display technologies, and more particularly, to a display device and an electronic device. Background Art

[0002] Generally, a display device can perform display. With the gradual improvement of consumers' demands, users have an increasingly strong demand for the contrast ratio of the display device during display. The contrast ratio of the display device in the related art cannot meet the needs of users. Summary of the Invention

[0003] In a first aspect, an embodiment of this application provides a display device, which includes:

[0004] A display screen having a plurality of pixels; and

[0005] A contrast ratio enhancement module disposed on one side of the display screen. The contrast ratio enhancement module has a plurality of light transmission units. Each light transmission unit is set corresponding to one pixel, and different light transmission units correspond to different pixels. The light transmission unit can present different light transmission rates under the control of a control signal; and

[0006] A controller. When the display screen displays a preset image and the contrast ratio of the display screen when displaying the preset image is less than a preset contrast ratio, the controller is configured to issue a control signal to adjust the light transmission rate of the light transmission unit in the contrast ratio enhancement module, so that the contrast ratio of the display device when displaying the preset image after the light transmission rate is adjusted is greater than or equal to the preset contrast ratio.

[0007] In a second aspect, an embodiment of this application provides an electronic device, which includes the display device as described in the first aspect.

[0008] In summary, the display device provided by the embodiment of the present application includes a contrast enhancement module. The contrast enhancement module includes a plurality of light-transmitting units, each light-transmitting unit corresponding to a pixel, and different light-transmitting units corresponding to different pixels. Therefore, the contrast enhancement module in the display device provided by the present application can achieve fine adjustment of the light transmittance of the preset image displayed on the display screen. Further, when the display screen displays a preset image and the contrast of the preset image displayed on the display screen is less than a preset contrast, the controller issues a control signal to adjust the light transmittance of the light-transmitting units in the contrast enhancement module, so that the contrast of the preset image displayed by the display device after the light transmittance is adjusted is greater than or equal to the preset contrast. Thus, it can be seen that in the display device provided by the embodiment of the present application, the controller issues a control signal to adjust the light transmittance of the light-transmitting units in the contrast enhancement module, so that the contrast of the preset image presented by the display device is greater than or equal to the preset contrast, thereby improving the contrast of the preset image displayed by the display device and meeting the requirements of the user for the contrast of the preset image displayed on the display screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0010] Figure 1 Schematic diagram of a display device provided by an embodiment of the present application;

[0011] Figure 2 is Figure 1 Cross-sectional view along line I-I in

[0012] Figure 3 Top view of a display device in an embodiment;

[0013] Figure 4 is an Figure 1 Circuit block diagram of the display device shown in

[0014] Figure 5 is a circuit block diagram of the display device shown in another embodiment; Figure 1 Circuit block diagram of the display device shown in

[0015] Figure 6 Schematic cross-sectional view of a contrast enhancement module in a display device provided by an embodiment of the present application;

[0016] Figure 7Schematic cross-sectional view of the contrast enhancement module in the display device provided by another embodiment of the present application;

[0017] Figure 8 Schematic diagram of the display device provided by another embodiment of the present application;

[0018] Figure 9 Schematic diagram of the display device provided by yet another embodiment of the present application;

[0019] Figure 10 is Figure 9 Schematic diagram of the photosensitive film shown in;

[0020] Figure 11 Schematic diagram of the electronic device provided by an embodiment of the present application.

[0021] Description of main element numbers:

[0022] Electronic device 1, display device 10, rear cover 20;

[0023] Display screen 110, pixel 111, display area 110a, first peripheral area 110b, second peripheral area 110c, display surface 110d;

[0024] Contrast enhancement module 120, main area 120a, first sub-area 120b, second sub-area 120c, light-transmitting unit 120d;

[0025] First control substrate 121, first substrate 1211, first electrode 1212, insulating layer 1213, liquid crystal layer 123, second control substrate 122, second substrate 1221, second electrode 1222;

[0026] Controller 130, display driver chip 140, photosensitive film 150, photosensitive unit 151. Detailed implementation manners

[0027] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0028] The terms "first", "second", etc. in the description, claims and the above-mentioned drawings of this application are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products or devices.

[0029] Reference to "embodiment" or "implementation" in this context means that a particular feature, structure or characteristic described in connection with an embodiment or implementation may be included in at least one embodiment of this application. The phrase appearing at various positions in the description does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0030] Please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , Figure 1 is a schematic diagram of a display device provided in an embodiment of this application; Figure 2 is Figure 1 a cross-sectional view taken along line I-I in Figure 3 is a top view of the display device in an embodiment; Figure 4 is of an embodiment Figure 1 a circuit block diagram of the display device shown in Figure 3 In (a) of Figure 1 is a top view of the display screen 110 in the display device 10 in Figure 3 In (b) of Figure 1 is a top view of the contrast enhancement module 120 in the display device 10 in Figure 3 In (c) of Figure 3The color displayed by each pixel 111 in (a) is only for illustration and should not be construed as a limitation on the pixel 111 provided by the embodiments of the present application. The display device 10 includes a display screen 110, a contrast enhancement module 120, and a controller 130. The display screen 110 has a plurality of pixels 111. The contrast enhancement module 120 is disposed on one side of the display screen 110. The contrast enhancement module 120 has a plurality of light transmissive units 120d. Each light transmissive unit 120d is disposed corresponding to a pixel 111, and different light transmissive units 120d correspond to different pixels 111. The light transmissive unit 120d can exhibit different light transmittance under the control of a control signal. When the display screen 110 displays a preset image and the contrast of the display screen 110 when displaying the preset image is less than a preset contrast, the controller 130 is configured to issue a control signal to adjust the light transmittance of the light transmissive unit 120d in the contrast enhancement module 120, so that the contrast of the display device 10 when displaying the preset image after the light transmittance is adjusted is greater than or equal to the preset contrast.

[0031] In the present embodiment, the display screen 110 is taken as an example of a liquid crystal display screen 110 for illustration. It can be understood that it should not be construed as a limitation on the embodiments of the present application. As long as the display screen 110 has a plurality of pixels 111. In one embodiment, when the display screen 110 has a plurality of pixels 111, the plurality of pixels 111 are arranged in an array. When the display screen 110 displays an image, each pixel 111 in the display screen 110 presents different gray-scale brightnesses and then presents corresponding colors. In this way, a color image with contrast and color can be formed. In another embodiment, when the display screen 110 displays an image, each pixel 111 in the display screen 110 presents different gray-scale brightnesses, and a black-and-white image can be formed. In the schematic diagram of the embodiments of the present application, the display screen 110 is taken as an example of displaying a color image for illustration and description. It can be understood that it should not be construed as a limitation on the display device 10 provided by the embodiments of the present application.

[0032] The contrast enhancement module 120 is disposed on one side of the display screen 110. In one embodiment, when the display device 10 further includes a backlight module, the contrast enhancement module 120 is disposed on the side of the display screen 110 away from the backlight module. In other words, the contrast enhancement module 120 is away from the backlight module compared to the display screen 110. In another embodiment, when the display device 10 further includes a backlight module, the contrast enhancement module 120 is disposed on the side of the display screen 110 close to the backlight module. As long as the contrast enhancement module 120 is located on one side of the display screen 110.

[0033] The contrast enhancement module 120 has a plurality of light transmissive units 120d, each light transmissive unit 120d is disposed corresponding to a pixel 111, and different light transmissive units 120d correspond to different pixels 111. The light transmittance of each light transmissive unit 120d can be individually controlled. Therefore, the contrast enhancement module 120 in the display device 10 provided by the embodiment of the present application can achieve fine adjustment of the light transmittance of the preset image displayed on the display screen 110.

[0034] The controller 130 can be, but is not limited to, an integrated chip or a module composed of circuit devices. For convenience of description, the contrast when the display screen 110 displays a preset image and the contrast is less than a preset contrast when the display screen 110 displays the preset image is defined as the first contrast. Wherein, the first contrast is less than the preset contrast. The controller 130 issues a control signal to adjust the light transmittance of the light transmissive unit 120d in the contrast enhancement module 120. After the light transmittance of the light transmissive unit 120d in the contrast enhancement module is adjusted, when the display device 10 displays the preset image on the display screen 110, the contrast presented by the display device 10 is the second contrast. Wherein, the second contrast is greater than or equal to the preset contrast.

[0035] In this embodiment, since the light transmissive units 120d in the contrast enhancement module 120 correspond one-to-one with the pixels 111 in the display screen 110, the light transmittance of each light transmissive unit 120d can be individually adjusted. Therefore, the display device 10 provided by the embodiment of the present application can achieve dynamic adjustment of the contrast at the pixel level of the preset image displayed by the display device 10. When the preset image displayed by the display device 10 changes, each frame of the image displayed by the display device 10 can have a good contrast.

[0036] In summary, for the display device 10 provided by the embodiment of the present application, the display device 10 includes a contrast enhancement module 120. The contrast enhancement module 120 includes a plurality of light transmission units 120d. Each light transmission unit 120d is provided corresponding to a pixel 111, and different light transmission units 120d correspond to different pixels 111. Therefore, the contrast enhancement module 120 in the display device 10 provided by the present application can achieve fine adjustment of the light transmittance of a preset image displayed on the display screen 110. Further, when the display screen 110 displays a preset image and the contrast of the preset image displayed on the display screen 110 is less than a preset contrast, the controller 130 issues a control signal to adjust the light transmittance of the light transmission units 120d in the contrast enhancement module 120, so that after the light transmittance is adjusted, the contrast of the preset image displayed by the display device 10 is greater than or equal to the preset contrast. It can be seen that for the display device 10 provided by the embodiment of the present application, the controller 130 issues a control signal to adjust the light transmittance of the light transmission units 120d in the contrast enhancement module 120, so that the contrast of the preset image presented by the display device 10 is greater than or equal to the preset contrast, thereby improving the contrast of the preset image displayed by the display device 10 and meeting the requirements of the user for the contrast of the preset image displayed on the display screen 110.

[0037] Further, in an embodiment, when the display screen 110 displays the preset image, the display screen 110 has bright-state pixels and dark-state pixels. Among them, the brightness of the bright-state pixels is greater than or equal to a first preset brightness, and the brightness of the dark-state pixels is less than or equal to a second preset brightness, where the second preset brightness is less than the first preset brightness. The contrast enhancement module 120 has a bright-state area and a dark-state area, where the bright-state area corresponds to the bright-state pixels and the dark-state area corresponds to the dark-state pixels. The controller 130 is configured to adjust at least one of the light transmittance of the light transmission units 120d in the dark-state area and the light transmittance of the light transmission units 120d in the bright-state area, so that after adjustment, the contrast of the preset image displayed by the display device 10 is greater than or equal to the preset contrast.

[0038] When the display screen 110 displays the preset picture, the contrast ratio is equal to the ratio of the brightness value of the bright-state pixels to the brightness value of the dark-state pixels. When the contrast ratio of the display screen 110 when displaying the preset picture is less than the preset contrast ratio, it means that the ratio obtained by dividing the brightness value of the bright-state pixels displayed by the display screen 110 by the brightness value of the dark-state pixels displayed by the display screen 110. When the display screen 110 displays the preset picture, the contrast ratio of the display device 10 when displaying the preset picture is the contrast ratio under the combined action of the preset picture displayed by the display screen 110 and the contrast ratio enhancement module 120. Since the display screen 110 has bright-state pixels and dark-state pixels, and the contrast ratio enhancement module 120 has a bright-state area and a dark-state area, the brightness value of the area corresponding to the brightness pixels 111 when the display device 10 displays the preset picture is the combined bright-state brightness value obtained by the combined action of the brightness value of the bright-state pixels and the light transmittance of the bright-state area; the brightness value corresponding to the dark-state pixel area when the display device 10 displays the preset picture is the combined dark-state brightness value obtained by the combined action of the light transmittance of the dark-state area. The contrast ratio of the display device 10 when displaying the preset picture is equal to the ratio of the combined bright-state brightness value to the combined dark-state brightness value.

[0039] The contrast ratio enhancement module 120 has a bright-state area, and the bright-state area includes one or more light-transmitting units 120d. The number of light-transmitting units 120d included in the bright-state area is the same as the number of bright-state pixels in the display screen 110. The contrast ratio enhancement module 120 has a dark-state area, and the dark-state area has one or more light-transmitting units 120d. The number of light-transmitting units 120d included in the dark-state area is the same as the number of dark-state pixels in the display screen 110.

[0040] As introduced above, when the brightness value of the bright-state pixels is fixed, the brightness value of the dark-state pixels is fixed, and the light transmittance of the light-transmitting unit 120d in the dark-state region remains unchanged, if the controller 130 adjusts the light transmittance of the light-transmitting unit 120d in the bright-state region, the integrated bright-state brightness value of the display device 10 when displaying the preset image can be adjusted, thereby changing the contrast of the display device 10 when displaying the preset image. Correspondingly, when the brightness value of the bright-state pixels is fixed, the brightness value of the dark-state pixels is fixed, and the light transmittance of the light-transmitting unit 120d in the bright-state region is fixed, if the controller 130 adjusts the light transmittance of the light-transmitting unit 120d in the dark-state region, the integrated dark-state brightness value of the display device 10 when displaying the preset image can be adjusted, thereby changing the contrast of the display device 10 when displaying the preset image. Correspondingly, when the brightness value of the bright-state pixels is fixed and the brightness value of the dark-state pixels is fixed, the controller 130 adjusts the light transmittance of the light-transmitting unit 120d in the dark-state region and adjusts the light transmittance of the light-transmitting unit 120d in the bright-state region, and the contrast of the display device 10 when displaying the preset image can also be changed.

[0041] In summary, for the display device 10 provided by the embodiment of the present application, the controller 130 is configured to adjust at least one of the light transmittance of the light-transmitting unit 120d in the dark-state region and the light transmittance of the light-transmitting unit 120d in the bright-state region, so that the contrast of the display device 10 when displaying the preset image after adjustment is greater than or equal to the preset contrast. Thereby, the contrast of the display device 10 when displaying the preset image is improved, meeting the user's requirement for the contrast of the display screen 110 when displaying the preset image.

[0042] Further, in one embodiment, when the Gamma curve Gamma X of the display screen 110 when displaying the preset image satisfies: A ≤ X < B, where A < B, and when the contrast of the display screen 110 when displaying the preset image is less than the preset contrast, the controller 130 issues a first control signal, and the first control signal is used to reduce the light transmittance of the light-transmitting unit 120d in the dark-state region, so that the contrast of the display device 10 when displaying the preset image after the light transmittance of the light-transmitting unit 120d in the dark-state region is reduced is greater than or equal to the preset contrast.

[0043] When the Gamma curve Gamma X when the display screen 110 displays the preset screen satisfies: when A ≤ X < B, it indicates that the overall brightness when the display screen 110 displays the preset screen is relatively bright. By reducing the light transmittance of the light-transmitting unit 120d in the dark state area of the contrast improvement module 120, the contrast when the display device 10 displays the preset screen can be improved significantly. Therefore, when the Gamma curve Gamma X when the display screen 110 displays the preset screen satisfies: A ≤ X < B, where A < B, and when the contrast when the display screen 110 displays the preset screen is less than the preset contrast, the controller 130 issues a first control signal, and the first control signal is used to reduce the light transmittance of the light-transmitting unit 120d in the dark state area, so that after the light transmittance of the light-transmitting unit 120d in the dark state area is reduced, the contrast when the display device 10 displays the preset screen is greater than or equal to the preset contrast; on the one hand, it can make the contrast when the adjusted display device 10 displays the preset screen greater than or equal to the preset contrast, thereby improving the contrast of the display device 10 when displaying the preset screen and meeting the user's requirements for the contrast of the display screen 110 when displaying the preset screen; on the other hand, it makes the controller 130 have a better contrast adjustment effect when the display device 10 displays the preset screen, so that the display effect when the adjusted display device 10 displays the preset screen is not easily distorted.

[0044] For example, A = 2.2 and B = 2.4. In other words, the Gamma curve Gamma X when the display screen 110 displays the preset screen satisfies: A ≤ X < B, that is, the Gamma curve Gamma X when the display screen 110 displays the preset screen is greater than or equal to the Gamma 2.2 curve and less than the Gamma 2.4 curve. When the Gamma curve Gamma X when the display screen 110 displays the preset screen satisfies: 2.2 ≤ X < 2.4, and when the contrast ratio when the display screen 110 displays the preset screen is less than the preset contrast ratio, the controller 130 issues a first control signal, and the first control signal is used to reduce the light transmittance of the light-transmitting unit 120d in the dark state area, so that the contrast ratio when the display device 10 displays the preset screen after the light transmittance of the light-transmitting unit 120d in the dark state area is reduced is greater than or equal to the preset contrast ratio; on the one hand, it can make the contrast ratio when the adjusted display device 10 displays the preset screen greater than or equal to the preset contrast ratio. Thus, the contrast ratio of the display device 10 when displaying the preset screen is improved, meeting the user's requirements for the contrast ratio when the display screen 110 displays the preset screen; on the other hand, it makes the controller 130 have a better effect on adjusting the contrast ratio when the display device 10 displays the preset screen, so that the display effect when the adjusted display device 10 displays the preset screen is not easily distorted.

[0045] Further, when the Gamma curve Gamma X when the display screen 110 displays the preset screen satisfies: C ≤ X < A, where C < A, and when the contrast ratio when the display screen 110 displays the preset screen is less than the preset contrast ratio, the controller 130 issues a second control signal, and the second control signal is used to increase the light transmittance of the light-transmitting unit 120d in the bright state area, so that the contrast ratio when the display device 10 displays the preset screen after the light transmittance of the light-transmitting unit 120d in the bright state area is increased is greater than or equal to the preset contrast ratio.

[0046] When the Gamma curve Gamma X when the display screen 110 displays the preset picture satisfies: when C≤X<A, it indicates that the overall brightness when the display screen 110 displays the preset picture is relatively dim. Increasing the light transmittance of the light-transmitting unit 120d in the bright-state area of the contrast improvement module 120 can greatly improve the contrast when the display device 10 displays the preset picture. Therefore, when the Gamma curve Gamma X when the display screen 110 displays the preset picture satisfies: C≤X<A, where C<A, and when the contrast when the display screen 110 displays the preset picture is less than the preset contrast, the controller 130 issues a second control signal, and the second control signal is used to reduce the light transmittance of the light-transmitting unit 120d in the dark-state area, so that the contrast when the display device 10 displays the preset picture after the light transmittance of the light-transmitting unit 120d in the dark-state area is reduced is greater than or equal to the preset contrast; on the one hand, it can make the contrast when the adjusted display device 10 displays the preset picture greater than or equal to the preset contrast, thereby improving the contrast of the display device 10 when displaying the preset picture and meeting the user's requirements for the contrast of the display screen 110 when displaying the preset picture; on the other hand, it makes the controller 130 have a better contrast adjustment effect on the display device 10 when displaying the preset picture, and makes the display effect of the adjusted display device 10 when displaying the preset picture not easily distorted.

[0047] For example, A = 2.2 and C = 2.0. In other words, the Gamma curve Gamma X of the display screen 110 when displaying the preset image satisfies: C ≤ X < A, that is, the Gamma curve Gamma X of the display screen 110 when displaying the preset image is greater than or equal to the Gamma2.0 curve and less than the Gamma2.2 curve. When the Gamma curve Gamma X of the display screen 110 when displaying the preset image satisfies: 2.0 ≤ X < 2.2, and when the contrast ratio of the display screen 110 when displaying the preset image is less than the preset contrast ratio, the controller 130 issues a second control signal, and the second control signal is used to increase the light transmittance of the light-transmitting unit 120d in the bright state area, so that after the light transmittance of the light-transmitting unit 120d in the bright state area is increased, the contrast ratio of the display device 10 when displaying the preset image is greater than or equal to the preset contrast ratio; on the one hand, it can make the contrast ratio of the display device 10 after adjustment when displaying the preset image greater than or equal to the preset contrast ratio, thereby improving the contrast ratio of the display device 10 when displaying the preset image and meeting the user's requirements for the contrast ratio of the display screen 110 when displaying the preset image; on the other hand, it makes the controller 130 have a better effect on adjusting the contrast ratio of the display device 10 when displaying the preset image, so that the display effect of the display device 10 after adjustment when displaying the preset image is not easily distorted.

[0048] Further, in an embodiment, when the Gamma curve Gamma X of the display screen 110 when displaying the preset image satisfies: B ≤ X, or X < C; and when the contrast ratio of the display screen 110 when displaying the preset image is less than the preset contrast ratio, the controller 130 issues a third control signal, and the third control signal is used to reduce the light transmittance of the light-transmitting unit 120d in the dark state area and is used to increase the light transmittance of the light-transmitting unit 120d in the bright state area, so that after the light transmittance of the light-transmitting unit 120d in the dark state area is reduced and after the light transmittance of the light-transmitting unit 120d in the bright state area is increased, the contrast ratio of the display device 10 when displaying the preset image is greater than or equal to the preset contrast ratio.

[0049] When the Gamma curve Gamma X when the display screen 110 displays the preset picture satisfies: B ≤ X, or X < C, it indicates that when the display screen 110 displays the preset picture, the light transmittance of the light-transmitting unit 120d in the dark state area of the contrast improvement module 120 is reduced and the light transmittance of the light-transmitting unit 120d in the bright state area is increased, which can greatly improve the contrast when the display device 10 displays the preset picture. Therefore, when the Gamma curve Gamma X when the display screen 110 displays the preset picture satisfies: B ≤ X, or X < C, and when the contrast when the display screen 110 displays the preset picture is less than the preset contrast, the controller 130 issues a third control signal, and the third control signal is used to reduce the light transmittance of the light-transmitting unit 120d in the dark state area and increase the light transmittance of the light-transmitting unit 120d in the bright state area, so that after the light transmittance of the light-transmitting unit 120d in the dark state area is reduced and after the light transmittance of the light-transmitting unit 120d in the bright state area is increased, the contrast when the display device 10 displays the preset picture is greater than or equal to the preset contrast; on the one hand, it can make the contrast when the adjusted display device 10 displays the preset picture greater than or equal to the preset contrast, thereby improving the contrast of the display device 10 when displaying the preset picture and meeting the user's requirements for the contrast when the display screen 110 displays the preset picture; on the other hand, it makes the controller 130 have a better effect on adjusting the contrast when the display device 10 displays the preset picture, so that the display effect when the adjusted display device 10 displays the preset picture is not easily distorted.

[0050] For example, B = 2.4 and C = 2.0. In other words, when the display screen 110 displays the preset screen, the Gamma curve Gamma X satisfies: when B ≤ X or X < C, that is, when the display screen 110 displays the preset screen, the Gamma curve Gamma X is greater than or equal to the Gamma 2.4 curve or less than the Gamma 2.0 curve. When the Gamma curve Gamma X when the display screen 110 displays the preset screen satisfies: 2.4 ≤ X or X < 2.0, and when the contrast ratio when the display screen 110 displays the preset screen is less than the preset contrast ratio, the controller 130 issues a third control signal, and the third control signal is used to reduce the light transmittance of the light-transmitting unit 120d in the dark state area and increase the light transmittance of the light-transmitting unit 120d in the bright state area, so that after the light transmittance of the light-transmitting unit 120d in the dark state area is reduced and after the light transmittance of the light-transmitting unit 120d in the bright state area is increased, the contrast ratio when the display device 10 displays the preset screen is greater than or equal to the preset contrast ratio; on the one hand, it can make the contrast ratio when the adjusted display device 10 displays the preset screen greater than or equal to the preset contrast ratio, thereby improving the contrast ratio of the display device 10 when displaying the preset screen and meeting the user's requirements for the contrast ratio when the display screen 110 displays the preset screen; on the other hand, it makes the controller 130 have a better effect on adjusting the contrast ratio when the display device 10 displays the preset screen, so that the display effect when the adjusted display device 10 displays the preset screen is not easily distorted.

[0051] Please refer to Figure 5 , Figure 5 For another embodiment of Figure 1 the circuit block diagram of the display device shown in. The display device 10 includes a display screen 110, a contrast ratio improvement module 120, and a controller 130. The display screen 110 has a plurality of pixels 111. The contrast ratio improvement module 120 is disposed on one side of the display screen 110. The contrast ratio improvement module 120 has a plurality of light-transmitting units 120d. Each light-transmitting unit 120d is disposed corresponding to a pixel 111, and different light-transmitting units 120d correspond to different pixels 111. The light-transmitting unit 120d can exhibit different light transmittances under the control of a control signal. When the display screen 110 displays a preset screen and when the contrast ratio when the display screen 110 displays the preset screen is less than the preset contrast ratio, the controller 130 is used to issue a control signal to adjust the light transmittance of the light-transmitting unit 120d in the contrast ratio improvement module 120, so that after the light transmittance is adjusted, the contrast ratio of the display device 10 when displaying the preset screen is greater than or equal to the preset contrast ratio.

[0052] Further, the display device 10 further includes a display driving chip 140. The display driving chip 140 is electrically connected to the display screen 110. The display driving chip 140 is configured to generate a plurality of driving voltage signals for driving the pixels 111. The controller 130 is electrically connected to the display driving chip 140 and is configured to read the voltage value of each driving voltage signal to obtain a detection signal. The controller 130 determines whether the contrast ratio of the display screen 110 when displaying the preset picture is less than a preset contrast ratio according to the detection signal.

[0053] When the display device 10 includes the display driving chip 140 and the controller 130, the display driving chip 140 may also be referred to as a first integrated chip (IC1), and the controller 130 may also be referred to as a second integrated chip (IC2).

[0054] When the display screen 110 displays the preset picture, the gray scale value of each pixel 111 is directly related to the voltage value of the driving voltage signal. Therefore, the controller 130 reads the voltage value of each driving voltage signal to obtain a detection signal, and the controller 130 determines whether the contrast ratio of the display screen 110 when displaying the preset picture is less than a preset contrast ratio according to the detection signal.

[0055] For example, the controller 130 determines whether the contrast ratio of the display screen 110 when displaying the preset picture is less than a preset contrast ratio according to the detection signal. When the Gamma curve Gamma X of the display screen 110 when displaying the preset picture satisfies: A ≤ X < B, if it is determined according to the detection signal that the driving voltage value corresponding to the dark pixel is less than or equal to a set value (that is, the brightness value of the dark pixel is less than or equal to a second preset brightness), then the controller 130 issues the first control signal to reduce the light transmittance of the light-transmitting unit 120d in the dark area, so that the contrast ratio of the display device 10 when the light-transmitting unit 120d in the dark area has its light transmittance reduced and displays the preset picture is greater than or equal to the preset contrast ratio.

[0056] Please refer to Figure 6 , Figure 6Schematic cross-sectional view of the contrast enhancement module in the display device provided by an embodiment of the present application. The contrast enhancement module 120 includes a first control substrate 121, a second control substrate 122, and a liquid crystal layer 123. The first control substrate 121 includes a first substrate 1211 and a first electrode 1212, and the first electrode 1212 is carried on the first substrate 1211. The second control substrate 122 is disposed opposite to and spaced apart from the first control substrate 121 to form a receiving space. The second control substrate 122 includes a second substrate 1221 and a second electrode 1222, and the second electrode 1222 is carried on the second substrate 1221. The liquid crystal layer 123 is located in the receiving space. Among them, the liquid crystal layer 123 exhibits different light transmittances under the control of the control signals applied to the first electrode 1212 and the second electrode 1222.

[0057] The first substrate 1211 is a transparent substrate. The material of the first substrate 1211 may be, but is not limited to, glass or other transparent materials, etc. The first electrode 1212 may be, but is not limited to, a transparent metal oxide electrode (such as ITO), or a metal electrode.

[0058] The second substrate 1221 is a transparent substrate. The material of the second substrate 1221 may be, but is not limited to, glass or other transparent materials. The material of the second substrate 1221 may be the same as or different from the material of the first substrate 1211. The second electrode 1222 may be, but is not limited to, a transparent metal oxide electrode (such as ITO), or a metal electrode. The material of the second electrode 1222 may be the same as or different from the material of the first electrode 1212, and is not limited in this embodiment.

[0059] The first electrode 1212, the second electrode 1222, and the liquid crystal layer 123 cooperate together to form a plurality of light transmission units 120d.

[0060] The first electrode 1212 and the second electrode 1222 are used to receive the control signals. To adjust the orientation of the liquid crystal molecules in the liquid crystal layer 123 in the corresponding dimming unit, and further adjust the light transmittance of the light transmission unit 120d.

[0061] In the contrast enhancement module 120 provided by the embodiment of the present application, the first electrode 1212 is disposed on the first substrate 1211, and the second electrode 1222 is disposed on the second substrate 1221. Therefore, a vertical electric field can be formed between the first electrode 1212 and the second electrode 1222. The so-called vertical electric field refers to the direction from the first electrode 1212 to the second electrode 1222, or the direction from the second electrode 1222 to the first electrode 1212. Therefore, the contrast enhancement module 120 provided by the embodiment of the present application is also referred to as the contrast enhancement module 120 of the TN mode.

[0062] The structure of the contrast enhancement module 120 in the display device 10 provided by the embodiment of the present application is simple and easy to implement, and has a good effect on enhancing the contrast of the display device 10.

[0063] Further, please refer to Figure 2 and Figure 6 , the display screen 110 has a display surface 110d, the first substrate 1211 is disposed on the side where the display surface 110d is located, and the first electrode 1212 is disposed on the side of the first substrate 1211 away from the display surface 110d. The second substrate 1221 is farther from the display screen 110 than the first substrate 1211, and the second electrode 1222 is disposed on the side of the second substrate 1221 facing the liquid crystal layer 123.

[0064] In this embodiment, the first substrate 1211 is disposed on the side where the display surface 110d is located. Therefore, the contrast enhancement module 120 is disposed on the side where the display surface 110d is located, which is beneficial to improving the contrast displayed by the display device 10.

[0065] The first electrode 1212 is disposed on the side of the first substrate 1211 away from the display surface 110d, and the second electrode 1222 is disposed on the side of the second substrate 1221 facing the liquid crystal layer 123. Therefore, the first substrate 1211 and the second substrate 1221 can protect the first electrode 1212 and the second electrode 1222, and can reduce or even prevent the first electrode 1212 and the second electrode 1222 from being scratched.

[0066] Please refer to Figure 7 , Figure 7A cross-sectional schematic diagram of a contrast enhancement module in a display device provided by another embodiment of the present application. The contrast enhancement module 120 includes a first substrate 1211, a first electrode 1212, an insulating layer 1213, a second electrode 1222, and a second substrate 1221. The first electrode 1212 is disposed on the first substrate 1211. The insulating layer 1213 is disposed on a side of the first electrode 1212 facing away from the first substrate 1211. The second electrode 1222 is disposed on a side of the insulating layer 1213 facing away from the first substrate 1211. The liquid crystal layer 123 is disposed on a side of the second electrode 1222 facing away from the first substrate 1211. The second substrate 1221 is located on a side of the liquid crystal layer 123 facing away from the first substrate 1211.

[0067] In this embodiment, the first substrate 1211 is a transparent substrate. The material of the first substrate 1211 may be, but is not limited to, glass or other transparent materials, etc. The second substrate 1221 is a transparent substrate. The material of the second substrate 1221 may be, but is not limited to, glass or other transparent materials. The material of the second substrate 1221 may be the same as or different from the material of the first substrate 1211.

[0068] The first electrode 1212 may be, but is not limited to, a transparent metal oxide electrode (such as ITO), or a metal electrode. The second electrode 1222 may be, but is not limited to, a transparent metal oxide electrode (such as ITO), or a metal electrode. The material of the second electrode 1222 may be the same as or different from the material of the first electrode 1212, and is not limited in this embodiment.

[0069] The first electrode 1212, the second electrode 1222, and the liquid crystal layer 123 cooperate together to form a plurality of light-transmitting units 120d.

[0070] The first electrode 1212 and the second electrode 1222 are used to receive the control signal. To adjust the orientation of the liquid crystal molecules in the liquid crystal layer 123 in the corresponding dimming unit, and further adjust the light transmittance of the light-transmitting unit 120d.

[0071] In this embodiment, the first electrode 1212 and the second electrode 1222 are disposed on the same first substrate 1211, and a horizontal electric field is generated between the first electrode 1212 and the second electrode 1222. Therefore, the contrast enhancement module 120 provided by the embodiment of the present application is also referred to as a contrast enhancement module 120 in the IPS mode.

[0072] The structure of the contrast enhancement module 120 in the display device 10 provided by the embodiment of the present application is simple and easy to implement, and has a good effect on enhancing the contrast of the display device 10.

[0073] Please refer to Figure 8 , Figure 8 which is a schematic diagram of a display device provided by another embodiment of the present application. For the convenience of illustration, in the schematic diagram of this embodiment, a certain gap is provided between the display screen 110 and the contrast enhancement module 120. It can be understood that this should not be construed as a limitation on the display device 10 provided by the embodiment of the present application. In this embodiment, the display screen 110 has a display area 110a, a first peripheral area 110b, and a second peripheral area 110c. The first peripheral area 110b is located on one side of the display area 110a, the second peripheral area 110c is located on one side of the display area 110a, and the first peripheral area 110b and the second peripheral area 110c are respectively disposed on two opposite sides of the display area 110a. Correspondingly, the contrast enhancement module 120 has a main area 120a, a first sub-area 120b, and a second sub-area 120c. The main area 120a is disposed corresponding to the display area 110a, the first sub-area 120b is located on one side of the main area 120a, the second sub-area 120c is located on one side of the display area 110a, and the first sub-area 120b and the second sub-area 120c are respectively located on two opposite sides of the main area 120a.

[0074] Among them, the light transmission angle of the first sub-area 120b is smaller than the light transmission angle of the main area 120a, and the light transmission angle of the second sub-area 120c is smaller than the light transmission angle of the main area 120a. Thus, when the display screen 110 of the display device 10 displays a picture, the user has a better viewing experience at the position corresponding to the main area 120a, while the viewing experience at the positions corresponding to the first sub-area 120b and the second sub-area 120c is poor. Therefore, the display device 10 has the function of anti-peeping (also known as anti-peeping).

[0075] In one embodiment, the contrast of the first sub-area 120b and the second sub-area 120c drops below a preset threshold, so that the display device 10 has the function of anti-peeping.

[0076] In one embodiment, when the contrast enhancement module 120 is a contrast enhancement module 120 of the TN mode, the display device 10 has a better anti-peeping effect.

[0077] Please refer to Figures 1 to 4 , and Figure 9 and Figure 10 , Figure 9Schematic diagram of a display device provided by another embodiment of the present application; Figure 10 is Figure 9 Schematic diagram of the photosensitive film shown in. In this embodiment, the display device 10 further includes a photosensitive film 150, and the photosensitive film 150 is disposed on a side of the contrast enhancement module 120 away from the display screen 110. The photosensitive film 150 includes a plurality of photosensitive units 151. The photosensitive units 151 are disposed corresponding to the light-transmitting units 120d, and different photosensitive units 151 are disposed corresponding to different light-transmitting units 120d. The photosensitive unit 151 is configured to sense the brightness of the light emitted from the pixel 111 corresponding to the photosensitive unit 151 and the light-transmitting unit 120d to obtain an actual brightness value. The controller 130 determines whether the contrast of the display device 10 displaying the preset picture after the light transmittance is adjusted is greater than or equal to a preset contrast according to the actual brightness value. If the contrast of the display device 10 displaying the preset picture after the light transmittance is adjusted is greater than or equal to the preset contrast, the adjustment is not continued. If the contrast of the display device 10 displaying the preset picture after the light transmittance is adjusted is less than the preset contrast, the adjustment is continued until the controller 130 determines that the contrast of the display device 10 displaying the preset picture after the light transmittance is adjusted is greater than or equal to the preset contrast according to the actual brightness value.

[0078] The display device 10 provided by the embodiment of the present application further includes a photosensitive film 150, and the photosensitive film 150 includes a plurality of photosensitive units 151. The photosensitive unit 151 is configured to sense the brightness of the light emitted from the pixel 111 corresponding to the photosensitive unit 151 and the light-transmitting unit 120d to obtain an actual brightness value. The controller 130 determines whether the contrast of the display device 10 displaying the preset picture after the light transmittance is adjusted is greater than or equal to a preset contrast according to the actual brightness value. In this way, the accuracy of the processor in determining whether the contrast of the display device 10 displaying the preset picture after the light transmittance is adjusted is greater than or equal to the preset contrast according to the actual brightness value can be improved.

[0079] Please refer to Figure 11 , Figure 11 Schematic diagram of an electronic device provided by an embodiment of the present application. The electronic device 1 further includes the display device 10 described in any of the foregoing embodiments.

[0080] In addition, in this embodiment, the electronic device 1 further includes a rear cover 20, and the rear cover 20 is configured to protect the display device 10.

[0081] The electronic device 1 includes, but is not limited to, devices capable of display such as mobile phones, telephones, televisions, tablet computers (Pads), personal computers, laptop computers (Personal Computers, PCs), vehicle-mounted devices, wearable devices, etc.

[0082] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application, and these improvements and refinements are also regarded as the protection scope of the present application.

Claims

1. A display device, characterized in that: The display device comprises: A display screen having a plurality of pixels; and A contrast enhancement module, wherein the contrast enhancement module is arranged on one side of the display screen, the contrast enhancement module has a plurality of light-transmitting units, each light-transmitting unit corresponds to a pixel, and different light-transmitting units correspond to different pixels, and the light-transmitting units can present different light transmittances under the control of a control signal; and A controller, when the display screen displays a preset picture and the contrast ratio when the display screen displays the preset picture is less than the preset contrast ratio, the controller is used to send a control signal to adjust the light transmittance of the light transmission unit in the contrast enhancement module, so that after the light transmittance is adjusted, the contrast ratio of the preset picture displayed by the display device is greater than or equal to the preset contrast ratio; When the display screen displays the preset picture, the Gamma curve Gamma X satisfies: A≤X<B, wherein A<B; or Gamma X satisfies: C≤X<A; or Gamma X satisfies: B≤X, or X<C, wherein C<A; the controller sends different control signals so that the contrast of the preset picture displayed by the display device after adjustment is greater than or equal to the preset contrast.

2. The display device according to claim 1, wherein: When the display screen displays the preset picture, the display screen has bright pixels and dark pixels, wherein the brightness of the bright pixels is greater than or equal to a first preset brightness, and the brightness of the dark pixels is less than or equal to a second preset brightness, wherein the second preset brightness is less than the first preset brightness; The contrast enhancement module has a bright state area and a dark state area, wherein the bright state area corresponds to the bright state pixel, and the dark state area corresponds to the dark state pixel; The controller is used to adjust at least one of the transmittance of the light-transmitting unit in the dark state area and the transmittance of the light-transmitting unit in the bright state area, so that the contrast of the display device when displaying the preset picture after adjustment is greater than or equal to the preset contrast.

3. The display device according to claim 2, wherein: When the gamma curve Gamma X when the display screen displays the preset picture satisfies: A≤X<B, wherein A<B, and when the contrast when the display screen displays the preset picture is less than the preset contrast, the controller sends a first control signal, and the first control signal is used to reduce the transmittance of the light-transmitting unit in the dark state area, so that after the transmittance of the light-transmitting unit in the dark state area is reduced, the contrast when the display device displays the preset picture is greater than or equal to the preset contrast.

4. The display device according to claim 2, wherein: When the gamma curve Gamma X when the display screen displays the preset picture satisfies: C≤X<A, wherein C<A, and when the contrast when the display screen displays the preset picture is less than the preset contrast, the controller sends a second control signal, and the second control signal is used to increase the transmittance of the light-transmitting unit in the bright state area, so that the contrast when the display device displays the preset picture after the transmittance of the light-transmitting unit in the bright state area is increased is greater than or equal to the preset contrast.

5. The display device according to claim 2, wherein: When the gamma curve Gamma X when the display screen displays the preset picture satisfies: B≤X, or X<C; and when the contrast when the display screen displays the preset picture is less than the preset contrast, the controller sends a third control signal, and the third control signal is used to reduce the transmittance of the light-transmitting unit in the dark state area and to increase the transmittance of the light-transmitting unit in the bright state area, so that after the transmittance of the light-transmitting unit in the dark state area is reduced and the transmittance of the light-transmitting unit in the bright state area is increased, the contrast when the display device displays the preset picture is greater than or equal to the preset contrast.

6. The display device according to any one of claims 1 to 5, characterized in that: The display device further includes: A display driver chip, the display driver chip is electrically connected to the display screen, the display driver chip is used to generate a plurality of driving voltage signals, and the driving voltage signals are used to drive the pixels; The controller is electrically connected to the display driver chip and is used to read the voltage value of each driving voltage signal to obtain a detection signal; The controller determines, according to the detection signal, whether the contrast ratio of the display screen when displaying the preset picture is less than a preset contrast ratio.

7. The display device according to claim 1, wherein: The contrast enhancement module comprises: A first control substrate, the first control substrate comprising a first substrate and a first electrode, the first electrode being carried on the first substrate; A second control substrate, the second control substrate is opposite to the first control substrate and is spaced apart to form a receiving space, the second control substrate comprises a second substrate and a second electrode, and the second electrode is carried on the second substrate; and a liquid crystal layer, wherein the liquid crystal layer is located in the receiving space; The liquid crystal layer exhibits different light transmittances under the control of control signals loaded on the first electrode and the second electrode.

8. The display device according to claim 7, characterized in that: The display screen has a display surface, the first substrate is arranged on a side where the display surface is located, and the first electrode is arranged on a side of the first substrate away from the display surface; The second substrate is farther away from the display screen than the first substrate, and the second electrode is arranged on a side of the second substrate facing the liquid crystal layer.

9. The display device according to claim 1, wherein: The contrast enhancement module comprises: a first substrate; a first electrode, the first electrode being disposed on the first substrate; an insulating layer, the insulating layer being disposed on a side of the first electrode facing away from the first substrate; a second electrode, the second electrode being disposed on a side of the insulating layer away from the first substrate; a liquid crystal layer, the liquid crystal layer being disposed on a side of the second electrode facing away from the first substrate; and A second substrate is located at a side of the liquid crystal layer away from the first substrate.

10. An electronic device, characterized in that: The electronic device comprises the display device according to any one of claims 1-9.

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