Display device and electronic apparatus

Abstract

The invention provides a display device and electronic equipment. The display device comprises a display screen, a contrast improving module and a controller. The display screen is provided with a plurality of pixels; the contrast improving module is arranged on one side of the display screen, the contrast improving module is provided with a plurality of light-transmitting units, each light-transmitting unit corresponds to one pixel, 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; when the display screen displays a preset picture and the contrast ratio when the display screen displays the preset picture is smaller than a preset contrast ratio, the controller is used for sending out a control signal to adjust the light transmittance of a light transmitting unit in the contrast ratio improving module. The contrast ratio of the preset picture displayed by the display device after the light transmittance is adjusted is larger than or equal to the preset contrast ratio. The display device provided by the embodiment of the invention is relatively high in contrast ratio when displaying a picture.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display device and an electronic device. Background Art

[0002] Generally, a display device can display. As the demands of consumers gradually increase, users have stronger demands for the contrast of display devices when displaying. The contrast of display devices in related art cannot meet the demands of users. Summary of the invention

[0003] In a first aspect, an embodiment of the present application provides a display device, the display device comprising: 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 transmittance of the light-transmitting unit in the contrast enhancement module, so that after the 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.

[0004] In a second aspect, an embodiment of the present application provides an electronic device, wherein the electronic device includes the display device as described in the first aspect.

[0005] In summary, the display device provided in the embodiment of the present application includes a contrast enhancement module, and the contrast enhancement module includes a plurality of light-transmitting units, each light-transmitting unit corresponds to a pixel setting, and different light-transmitting units correspond to different pixels. Therefore, the contrast enhancement module in the display device provided in the present application can realize fine adjustment of the transmittance of the preset picture displayed on the display screen. Further, when the display screen displays the preset picture and the contrast of the preset picture displayed on the display screen is less than the preset contrast, the controller sends a control signal to adjust the transmittance of the light-transmitting unit in the contrast enhancement module, so that the contrast of the preset picture displayed by the display device after the transmittance is adjusted is greater than or equal to the preset contrast. It can be seen from this that the display device provided in the embodiment of the present application, the controller sends a control signal to adjust the transmittance of the light-transmitting unit in the contrast enhancement module, so that the contrast of the preset picture presented by the display device is greater than or equal to the preset contrast, thereby improving the contrast of the preset picture displayed by the display device, and meeting the user's requirements for the contrast when the preset picture is displayed on the display screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the implementation will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0007] Figure 1 A schematic diagram of a display device provided in one embodiment of the present application; Figure 2 for Figure 1 Sectional view along line II; Figure 3 is a top view of a display device in one embodiment; Figure 4 For one embodiment Figure 1 A circuit block diagram of the display device shown in ; Figure 5 For another embodiment Figure 1 A circuit block diagram of the display device shown in; Figure 6 A cross-sectional schematic diagram of a contrast enhancement module in a display device provided in one embodiment of the present application; Figure 7 A cross-sectional schematic diagram of a contrast enhancement module in a display device provided in another embodiment of the present application; Figure 8 A schematic diagram of a display device provided in another embodiment of the present application; Fig. 9 A schematic diagram of a display device provided in yet another embodiment of the present application; Fig.10 for Fig. 9 Schematic diagram of the photosensitive film shown in; Fig.11 A schematic diagram of an electronic device provided in accordance with an embodiment of the present application.

[0008] Description of main component numbers: Electronic device 1, display device 10, back cover 20; Display screen 110, pixel 111, display area 110a, first peripheral area 110b, second peripheral area 110c, display surface 110d; Contrast enhancement module 120, main area 120a, first sub-area 120b, second sub-area 120c, light-transmitting unit 120d; A first control substrate 121, a first substrate 1211, a first electrode 1212, an insulating layer 1213, a liquid crystal layer 123, a second control substrate 122, a second substrate 1221, and a second electrode 1222; Controller 130 , display driver chip 140 , photosensitive film 150 , photosensitive unit 151 . DETAILED DESCRIPTION

[0009] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0010] The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices.

[0011] Reference to "embodiment" or "implementation" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment or implementation may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0012] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 , Figure 1 A schematic diagram of a display device provided in one embodiment of the present application; Figure 2 for Figure 1 Sectional view along line II; Figure 3 is a top view of a display device in one embodiment; Figure 4 For one embodiment Figure 1 The circuit block diagram of the display device shown in FIG. Figure 3 (a) in Figure 1 A top view of the display screen 110 in the display device 10; Figure 3 (b) in Figure 1 A top view of a contrast enhancement module 120 in a display device 10; Figure 3 (c) is a top view of the display screen 110 and the contrast enhancement module 120. Figure 3 The color displayed by each pixel 111 in (a) is only a schematic diagram and should not be understood as a limitation on the pixel 111 provided in the embodiment 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 arranged on one side of the display screen 110. The contrast enhancement module 120 has a plurality of light-transmitting units 120d. Each light-transmitting unit 120d is arranged corresponding to a pixel 111, and different light-transmitting units 120d correspond to different pixels 111, and the light-transmitting units 120d can present different light transmittances under the control of a control signal. When the display screen 110 displays a preset picture and the contrast when the display screen 110 displays the preset picture is less than the preset contrast, the controller 130 is used to send a control signal to adjust the light transmittance of the light-transmitting unit 120d in the contrast enhancement module 120, so that the contrast of the preset picture displayed by the display device 10 after the light transmittance is adjusted is greater than or equal to the preset contrast.

[0013] In this embodiment, the display screen 110 is a liquid crystal display screen 110 as an example for illustration, which can be understood that it should not be understood as a limitation on the embodiment 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 a picture, each pixel 111 in the display screen 110 presents a different grayscale brightness, and then presents a corresponding color, so that a color picture with contrast and color can be formed. In another embodiment, when the display screen 110 displays a picture, each pixel 111 in the display screen 110 presents a different grayscale brightness, which can form a black and white picture. In the schematic diagram of the embodiment of the present application, the display screen 110 is used as an example to illustrate and explain the color picture, which can be understood that it should not be understood as a limitation on the display device 10 provided in the embodiment of the present application.

[0014] 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 a 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 a 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, it will suffice.

[0015] The contrast enhancement module 120 has a plurality of light-transmitting units 120d, each light-transmitting unit 120d is arranged corresponding to a pixel 111, and different light-transmitting units 120d correspond to different pixels 111, and the transmittance of each light-transmitting unit 120d can be controlled individually. Therefore, the contrast enhancement module 120 in the display device 10 provided in the embodiment of the present application can realize fine adjustment of the transmittance of the preset picture displayed on the display screen 110.

[0016] The controller 130 may be, but is not limited to, an integrated chip, or a module composed of circuit devices. For the convenience of description, the contrast when the display screen 110 displays a preset picture and the contrast when the display screen 110 displays the preset picture is less than the preset contrast is named as the first contrast. Among them, the first contrast is less than the preset contrast. The controller 130 sends a control signal to adjust the transmittance of the light-transmitting unit 120d in the contrast enhancement module 120. After the transmittance of the light-transmitting unit 120d in the contrast enhancement module is adjusted, when the display device 10 displays the preset picture on the display screen 110, the contrast presented by the display device 10 is the second contrast. Among them, the second contrast is greater than or equal to the preset contrast.

[0017] In this embodiment, since the light-transmitting units 120d in the contrast enhancement module 120 correspond one-to-one to the pixels 111 in the display screen 110, the light transmittance of each light-transmitting unit 120d can be adjusted individually. Therefore, the display device 10 provided in the embodiment of the present application can realize the dynamic adjustment of the contrast of the pixel level of the preset picture displayed by the display device 10. When the preset picture displayed by the display device 10 changes, each frame of the picture displayed by the display device 10 can have a good contrast.

[0018] In summary, the display device 10 provided in the embodiment of the present application includes a contrast enhancement module 120, and the contrast enhancement module 120 includes a plurality of light-transmitting units 120d, each light-transmitting unit 120d is arranged corresponding to a pixel 111, and different light-transmitting units 120d correspond to different pixels 111, therefore, the contrast enhancement module 120 in the display device 10 provided in the present application can realize fine adjustment of the transmittance of the preset picture displayed by the display screen 110. Further, when the display screen 110 displays the preset picture and the contrast of the preset picture displayed by the display screen 110 is less than the preset contrast, the controller 130 sends a control signal to adjust the transmittance of the light-transmitting unit 120d in the contrast enhancement module 120, so that after the transmittance is adjusted, the contrast of the preset picture displayed by the display device 10 is greater than or equal to the preset contrast. It can be seen that in the display device 10 provided in the embodiment of the present application, the controller 130 sends a control signal to adjust the transmittance of the light-transmitting unit 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 user's requirement for the contrast when the display screen 110 displays the preset image.

[0019] Further, in one embodiment, when the display screen 110 displays the preset screen, the display screen 110 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 120 has a bright area and a dark area, wherein the bright area corresponds to the bright pixels, and the dark area corresponds to the dark pixels. The controller 130 is used to adjust at least one of the transmittance of the light-transmitting unit 120d in the dark area and the transmittance of the light-transmitting unit 120d in the bright area, so that the contrast of the display device 10 when displaying the preset screen after adjustment is greater than or equal to the preset contrast.

[0020] The contrast ratio when the display screen 110 displays the preset picture is equal to the ratio of the brightness value of the bright pixel to the brightness value of the dark pixel. When the contrast ratio when the display screen 110 displays the preset picture is less than the preset contrast ratio, it means the ratio obtained by dividing the brightness value of the bright pixel displayed by the display screen 110 by the brightness value of the dark pixel displayed by the display screen 110. When the display screen 110 displays the preset picture, the contrast ratio of the preset picture displayed by the display device 10 is the contrast ratio of the preset picture displayed by the display screen 110 and the contrast enhancement module 120. Since the display screen 110 has bright pixels and dark pixels, and the contrast enhancement module 120 has a bright area and a dark area, the brightness value of the area corresponding to the brightness pixel 111 when the display device 10 displays the preset picture is the comprehensive bright brightness value obtained by the comprehensive effect of the brightness value of the bright pixel and the transmittance of the bright area; the comprehensive dark brightness value obtained by the comprehensive effect of the brightness value of the dark pixel area and the transmittance of the dark area when the display device 10 displays the preset picture. The contrast ratio of the display device 10 when displaying the preset picture is equal to the ratio of the integrated bright state brightness value to the integrated dark state brightness value.

[0021] The contrast enhancement module 120 has a bright state region, and the bright state region includes one or more light-transmitting units 120d. The number of light-transmitting units 120d included in the bright state region is consistent with the number of bright state pixels in the display screen 110. The contrast enhancement module 120 has a dark state region, and the dark state region includes one or more light-transmitting units 120d. The number of light-transmitting units 120d included in the dark state region is consistent with the number of dark state pixels in the display screen 110.

[0022] As can be seen from the foregoing description, when the brightness value of the bright-state pixel is constant, the brightness value of the dark-state pixel is constant, and the transmittance of the light-transmitting unit 120d in the dark-state area remains unchanged, if the controller 130 adjusts the transmittance of the light-transmitting unit 120d in the bright-state area, the comprehensive bright-state brightness value when the display device 10 displays the preset picture can be adjusted, thereby changing the contrast when the display device 10 displays the preset picture. Correspondingly, when the brightness value of the bright-state pixel is constant, the brightness value of the dark-state pixel is constant, and the transmittance of the light-transmitting unit 120d in the bright-state area is constant, if the controller 130 adjusts the transmittance of the light-transmitting unit 120d in the dark-state area, the comprehensive dark-state brightness value when the display device 10 displays the preset picture can be adjusted, thereby changing the contrast when the display device 10 displays the preset picture. Correspondingly, when the brightness value of the bright state pixel is constant and the brightness value of the dark state pixel is constant, the controller 130 adjusts the transmittance of the light-transmitting unit 120d in the dark state area and adjusts the transmittance of the light-transmitting unit 120d in the bright state area, and can also change the contrast of the display device 10 when displaying the preset picture.

[0023] In summary, in the display device 10 provided in the embodiment of the present application, the controller 130 is used to adjust at least one of the transmittance of the light-transmitting unit 120d in the dark state area and the transmittance of the light-transmitting unit 120d in the bright state area, so that the contrast ratio of the preset picture displayed by the display device 10 after adjustment is greater than or equal to the preset contrast ratio. Thus, the contrast ratio of the preset picture displayed by the display device 10 is improved, and the user's requirement for the contrast ratio of the preset picture displayed by the display screen 110 is met.

[0024] Further, in one embodiment, when the display screen 110 displays the preset picture, a gamma curve Gamma X satisfies: A≤X<B, wherein A<B, and when the contrast ratio of the display screen 110 when displaying the preset picture is less than a preset contrast ratio, the controller 130 sends a first control signal, and the first control signal is used to reduce the transmittance of the light-transmitting unit 120d in the dark state area, so that after the transmittance of the light-transmitting unit 120d in the dark state area is reduced, the contrast ratio of the display device 10 when displaying the preset picture is greater than or equal to the preset contrast ratio.

[0025] When the Gamma curve Gamma X of the display screen 110 when displaying the preset picture satisfies: A≤X<B, it indicates that the overall brightness of the display screen 110 when displaying the preset picture is relatively bright, and reducing the transmittance of the light-transmitting unit 120d in the dark area of ​​the contrast enhancement module 120 can greatly improve the contrast of the display device 10 when displaying the preset picture. Therefore, when the display screen 110 displays the preset picture, the Gamma curve Gamma X satisfies: A≤X<B, wherein A<B, and when the contrast ratio of the display screen 110 when displaying the preset picture is less than the preset contrast ratio, the controller 130 sends a first control signal, and the first control signal is used to reduce the transmittance of the light-transmitting unit 120d in the dark state area, so that after the transmittance of the light-transmitting unit 120d in the dark state area is reduced, the contrast ratio of the display device 10 when displaying the preset picture is greater than or equal to the preset contrast ratio; on the one hand, the contrast ratio of the display device 10 when displaying the preset picture after the adjustment is greater than or equal to the preset contrast ratio, thereby improving the contrast ratio of the display device 10 when displaying the preset picture, and meeting the user's requirements for the contrast ratio of the display screen 110 when displaying the preset picture; on the other hand, the controller 130 has a better effect of adjusting the contrast ratio of the display device 10 when displaying the preset picture, so that the display effect of the display device 10 when displaying the preset picture after the adjustment is not easily distorted.

[0026] For example, A=2.2, B=2.4, in other words, the Gamma curve Gamma X when the display screen 110 displays the preset picture satisfies: A≤X<B, that is, the Gamma curve Gamma X when the display screen 110 displays the preset picture 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 picture satisfies: 2.2≤X<2.4, and when the contrast when the display screen 110 displays the preset picture is less than the preset contrast, the controller 130 sends a first control signal, and the first control signal is used to reduce the transmittance of the light-transmitting unit 120d in the dark state area, so that after the transmittance of the light-transmitting unit 120d in the dark state area is reduced, the contrast when the display device 10 displays the preset picture is greater than or equal to the preset contrast; on the one hand, the contrast when the display device 10 displays the preset picture after the adjustment can be greater than or equal to the preset contrast. Thereby, the contrast of the preset picture displayed by the display device 10 is improved, and the user's requirement for the contrast when the display screen 110 displays the preset picture is met; on the other hand, the controller 130 has a better effect of adjusting the contrast when the display device 10 displays the preset picture, so that the display effect of the display device 10 when displaying the preset picture after adjustment is not easily distorted.

[0027] Further, when the gamma curve Gamma X of the display screen 110 when displaying the preset picture satisfies: C≤X<A, wherein C<A, and when the contrast ratio of the display screen 110 when displaying the preset picture is less than the preset contrast ratio, the controller 130 sends a second control signal, and the second control signal is used to increase the transmittance of the light-transmitting unit 120d in the bright state area, so that the contrast ratio of the display device 10 when displaying the preset picture after the transmittance ratio of the light-transmitting unit 120d in the bright state area is increased is greater than or equal to the preset contrast ratio.

[0028] When the Gamma curve Gamma X of the display screen 110 when displaying the preset picture satisfies: C≤X<A, it indicates that the overall brightness of the display screen 110 when displaying the preset picture is relatively dark. Increasing the transmittance of the light-transmitting unit 120d in the bright area of ​​the contrast enhancement module 120 can significantly improve the contrast of the display device 10 when displaying the preset picture. Therefore, when the display screen 110 displays the preset picture, the Gamma curve Gamma X satisfies: C≤X<A, wherein C<A, and when the contrast of the display screen 110 when displaying the preset picture is less than the preset contrast, the controller 130 sends a second control signal, and the second control signal is used to reduce the transmittance of the light-transmitting unit 120d in the dark state area, so that after the transmittance of the light-transmitting unit 120d in the dark state area is reduced, the contrast of the display device 10 when displaying the preset picture is greater than or equal to the preset contrast; on the one hand, the contrast of the preset picture displayed by the display device 10 after the adjustment is greater than or equal to the preset contrast, thereby improving the contrast of the preset picture displayed by the display device 10, and meeting the user's requirements for the contrast when the display screen 110 displays the preset picture; on the other hand, the contrast adjustment effect of the controller 130 on the display device 10 when displaying the preset picture is better, so that the display effect of the preset picture displayed by the display device 10 after the adjustment is not easily distorted.

[0029] For example, A=2.2, C=2.0. In other words, the gamma curve Gamma X when the display screen 110 displays the preset picture satisfies: C≤X<A, that is, the gamma curve Gamma X when the display screen 110 displays the preset picture 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 picture satisfies: 2.0≤X<2.2, and when the contrast of the display screen 110 when displaying the preset picture is less than the preset contrast, the controller 130 sends a second control signal, and the second control signal is used to increase the transmittance of the light-transmitting unit 120d in the bright state area, so that after the transmittance of the light-transmitting unit 120d in the bright state area is increased, the contrast of the display device 10 when displaying the preset picture is greater than or equal to the preset contrast; on the one hand, the contrast of the preset picture displayed by the display device 10 after the adjustment is greater than or equal to the preset contrast, thereby improving the contrast of the preset picture displayed by the display device 10, and meeting the user's requirements for the contrast when the display screen 110 displays the preset picture; on the other hand, the contrast adjustment effect of the controller 130 on the display device 10 when displaying the preset picture is better, so that the display effect of the preset picture displayed by the display device 10 after the adjustment is not easily distorted.

[0030] Further, in one embodiment, when the gamma curve Gamma X of the display screen 110 when displaying the preset picture satisfies: B≤X, or X<C; and when the contrast of the display screen 110 when displaying the preset picture is less than the preset contrast, the controller 130 sends a third control signal, and the third control signal is used to reduce the transmittance of the light-transmitting unit 120d in the dark state area, and to increase the transmittance of the light-transmitting unit 120d in the bright state area, so that after the transmittance of the light-transmitting unit 120d in the dark state area is reduced and the transmittance of the light-transmitting unit 120d in the bright state area is increased, the contrast of the display device 10 when displaying the preset picture is greater than or equal to the preset contrast.

[0031] When the Gamma curve Gamma X of the display screen 110 when displaying the preset picture satisfies: B≤X, or X<C, it indicates that when the display screen 110 displays the preset picture, the transmittance of the light-transmitting unit 120d in the dark state area of ​​the contrast enhancement module 120 is reduced and the transmittance of the light-transmitting unit 120d in the bright state area is increased, which can greatly improve the contrast of the display device 10 when displaying the preset picture. Therefore, when the display screen 110 displays the preset picture, the Gamma curve Gamma X satisfies: B≤X, or X<C, and when the contrast ratio of the display screen 110 when displaying the preset picture is less than the preset contrast ratio, the controller 130 sends a third control signal, and the third control signal is used to reduce the transmittance of the light-transmitting unit 120d in the dark state area and increase the transmittance of the light-transmitting unit 120d in the bright state area, so that after the transmittance of the light-transmitting unit 120d in the dark state area is reduced and after the 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 picture is greater than or equal to the preset contrast ratio; on the one hand, the contrast ratio of the display device 10 when displaying the preset picture after the adjustment is greater than or equal to the preset contrast ratio, thereby improving the contrast ratio of the display device 10 when displaying the preset picture, and meeting the user's requirements for the contrast ratio of the display screen 110 when displaying the preset picture; on the other hand, the controller 130 has a better effect of adjusting the contrast ratio of the display device 10 when displaying the preset picture, so that the display effect of the display device 10 when displaying the preset picture after the adjustment is not easily distorted.

[0032] For example, B=2.4, C=2.0. In other words, when the display screen 110 displays the preset picture, the Gamma curve Gamma X satisfies: B≤X, or X<C, that is, when the display screen 110 displays the preset picture, the Gamma curve Gamma X is greater than or equal to the Gamma 2.4 curve, or less than the Gamma 2.0 curve. X satisfies: 2.4≤X, or X<2.0, and when the contrast ratio of the display screen 110 when displaying the preset picture is less than the preset contrast ratio, the controller 130 sends a third control signal, and the third control signal is used to reduce the transmittance of the light-transmitting unit 120d in the dark state area and increase the transmittance of the light-transmitting unit 120d in the bright state area, so that after the transmittance of the light-transmitting unit 120d in the dark state area is reduced and after the 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 picture is greater than or equal to the preset contrast ratio; on the one hand, the contrast ratio of the display device 10 when displaying the preset picture after the adjustment is greater than or equal to the preset contrast ratio, thereby improving the contrast ratio of the display device 10 when displaying the preset picture, and meeting the user's requirements for the contrast ratio of the display screen 110 when displaying the preset picture; on the other hand, the controller 130 has a better effect of adjusting the contrast ratio of the display device 10 when displaying the preset picture, so that the display effect of the display device 10 when displaying the preset picture after the adjustment is not easily distorted.

[0033] See also Figure 5 , Figure 5 For another embodiment Figure 1 The circuit block diagram of the display device shown in . 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 arranged on one side of the display screen 110. The contrast enhancement module 120 has a plurality of light-transmitting units 120d. Each light-transmitting unit 120d is arranged corresponding to a pixel 111, and different light-transmitting units 120d correspond to different pixels 111, and the light-transmitting units 120d can present different light transmittances under the control of a control signal. When the display screen 110 displays a preset picture and the contrast when the display screen 110 displays the preset picture is less than the preset contrast, the controller 130 is used to send a control signal to adjust the light transmittance of the light-transmitting unit 120d in the contrast enhancement module 120, so that the contrast of the preset picture displayed by the display device 10 after the light transmittance is adjusted is greater than or equal to the preset contrast.

[0034] Furthermore, the display device 10 further includes a display driver chip 140. The display driver chip 140 is electrically connected to the display screen 110, and is used to generate a plurality of drive voltage signals, and the drive voltage signals are used to drive the pixels 111. The controller 130 is electrically connected to the display driver chip 140, and is used to read the voltage value of each drive voltage signal to obtain a detection signal. The controller 130 determines whether the contrast of the display screen 110 when displaying the preset picture is less than a preset contrast according to the detection signal.

[0035] When the display device 10 includes a display driver chip 140 and a controller 130 , the display driver 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 ).

[0036] When the display screen 110 displays the preset picture, the grayscale 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 of the display screen 110 when displaying the preset picture is less than the preset contrast according to the detection signal.

[0037] For example, the controller 130 determines whether the contrast ratio of the display screen 110 when displaying the preset picture is less than the 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, it is determined according to the detection signal that the driving voltage value corresponding to the dark-state pixel is less than or equal to the set value (that is, the brightness value of the dark-state pixel is less than or equal to the second preset brightness), then the controller 130 sends the first control signal to reduce the transmittance of the light-transmitting unit 120d in the dark-state area, so that after the transmittance of the light-transmitting unit 120d in the dark-state area is reduced, the contrast ratio of the display device 10 when displaying the preset picture is greater than or equal to the preset contrast ratio.

[0038] See also Figure 6 , Figure 6The cross-sectional schematic diagram of the contrast enhancement module in the display device provided in one 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 opposite to the first control substrate 121 and is arranged at intervals to form a receiving space, and 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. Wherein, the liquid crystal layer 123 presents different light transmittances under the control of the control signals loaded on the first electrode 1212 and the second electrode 1222.

[0039] 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. The first electrode 1212 may be, but is not limited to, a transparent metal oxide electrode (such as ITO), or a metal electrode.

[0040] 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, which is not limited in this embodiment.

[0041] The first electrode 1212 , the second electrode 1222 , and the liquid crystal layer 123 cooperate to form a plurality of light-transmitting units 120 d .

[0042] The first electrode 1212 and the second electrode 1222 are used to receive the control signal to adjust the direction of the liquid crystal molecules of the liquid crystal layer 123 in the corresponding dimming unit, thereby adjusting the light transmittance of the light-transmitting unit 120d.

[0043] In the contrast enhancement module 120 provided in 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, so that 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 in which the first electrode 1212 points to the second electrode 1222, or the direction in which the second electrode 1222 points to the first electrode 1212. Therefore, the contrast enhancement module 120 provided in the embodiment of the present application is also called a TN mode contrast enhancement module 120.

[0044] The contrast enhancement module 120 in the display device 10 provided in the embodiment of the present application has a simple structure and is easy to implement, and has a good effect of enhancing the contrast of the display device 10 .

[0045] Please also refer to Figure 2 and Figure 6 The display screen 110 has a display surface 110d, the first substrate 1211 is disposed on a side of the display surface 110d, and the first electrode 1212 is disposed on a side of the first substrate 1211 away from the display surface 110d. The second substrate 1221 is further away from the display screen 110 than the first substrate 1211, and the second electrode 1222 is disposed on a side of the second substrate 1221 facing the liquid crystal layer 123.

[0046] In this embodiment, the first substrate 1211 is disposed on the side where the display surface 110 d is located. Therefore, the contrast enhancement module 120 is disposed on the side where the display surface 110 d is located, which is beneficial to improve the contrast displayed by the display device 10 .

[0047] The first electrode 1212 is arranged on the side of the first substrate 1211 away from the display surface 110d, and the second electrode 1222 is arranged 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, which can reduce or even prevent the first electrode 1212 and the second electrode 1222 from being scratched.

[0048] See also Figure 7 , Figure 7A cross-sectional schematic diagram of a contrast enhancement module in a display device provided in 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 that is away from the first substrate 1211. The second electrode 1222 is disposed on a side of the insulating layer 1213 that is away from the first substrate 1211. The liquid crystal layer 123 is disposed on a side of the second electrode 1222 that is away from the first substrate 1211. The second substrate 1221 is located on a side of the liquid crystal layer 123 that is away from the first substrate 1211.

[0049] 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. 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 that of the first substrate 1211.

[0050] 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 that of the first electrode 1212, or may be different from that of the first electrode 1212, which is not limited in this embodiment.

[0051] The first electrode 1212 , the second electrode 1222 , and the liquid crystal layer 123 cooperate to form a plurality of light-transmitting units 120 d .

[0052] The first electrode 1212 and the second electrode 1222 are used to receive the control signal to adjust the direction of the liquid crystal molecules of the liquid crystal layer 123 in the corresponding dimming unit, thereby adjusting the light transmittance of the light-transmitting unit 120d.

[0053] In this embodiment, the first electrode 1212 and the second electrode 1222 are disposed on the same first substrate 1211, and the first electrode 1212 and the second electrode 1222 generate a horizontal electric field. Therefore, the contrast enhancement module 120 provided in the embodiment of the present application is also referred to as an IPS mode contrast enhancement module 120.

[0054] The contrast enhancement module 120 in the display device 10 provided in the embodiment of the present application has a simple structure and is easy to implement, and has a good effect of enhancing the contrast of the display device 10 .

[0055] See also Figure 8 , Figure 8 A schematic diagram of a display device provided in another embodiment of the present application. For the sake of convenience, in the schematic diagram of the present embodiment, the display screen 110 and the contrast enhancement module 120 are separated by a certain gap. It can be understood that this should not be understood as a limitation on the display device 10 provided in the embodiment of the present application. In the present 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 arranged on 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 arranged 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.

[0056] The light transmission angle of the first sub-area 120b is smaller than that of the main area 120a, and the light transmission angle of the second sub-area 120c is smaller than that of the main area 120a. In this way, 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, but has a poor viewing experience at the positions corresponding to the first sub-area 120b and the second sub-area 120c. Therefore, the display device 10 has an anti-peeping (also called anti-peeping) function.

[0057] In one embodiment, the contrast ratio of the first sub-region 120b and the second sub-region 120c decreases below a preset threshold value, so that the display device 10 has an anti-peeping function.

[0058] In one embodiment, when the contrast enhancement module 120 is a TN mode contrast enhancement module 120 , the display device 10 has a better anti-peeping effect.

[0059] See also Figures 1 to 4 ,as well as Fig. 9 and Fig.10 , Fig. 9A schematic diagram of a display device provided in yet another embodiment of the present application; Fig.10 for Fig. 9 Schematic diagram of the photosensitive film shown in . In this embodiment, the display device 10 also includes a photosensitive film 150, and the photosensitive film 150 is arranged on the 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 unit 151 is arranged corresponding to the light-transmitting unit 120d, and different photosensitive units 151 are arranged corresponding to different light-transmitting units 120d. The photosensitive unit 151 is used to sense the brightness of the light emitted by the pixel 111 and the light-transmitting unit 120d corresponding to the photosensitive unit 151 to obtain an actual brightness value. The controller 130 determines whether the contrast of the preset picture displayed by the display device 10 after the transmittance is adjusted is greater than or equal to the preset contrast based on the actual brightness value. If the contrast of the preset picture displayed by the display device 10 after the transmittance is adjusted is greater than or equal to the preset contrast, the adjustment is no longer continued. If the contrast of the preset image displayed by the display device 10 after the transmittance adjustment is less than the preset contrast, the adjustment continues until the controller 130 determines, based on the actual brightness value, that the contrast of the preset image displayed by the display device 10 after the transmittance adjustment is greater than or equal to the preset contrast.

[0060] The display device 10 provided in the embodiment of the present application also includes a photosensitive film 150, and the photosensitive film 150 includes a plurality of photosensitive units 151. The photosensitive unit 151 is used to sense the brightness of the light emitted by the pixel 111 and the light-transmitting unit 120d corresponding to the photosensitive unit 151 to obtain an actual brightness value. The controller 130 determines whether the contrast of the preset picture displayed by the display device 10 after the transmittance is adjusted is greater than or equal to the preset contrast according to the actual brightness value, so that the accuracy of the processor in determining whether the contrast of the preset picture displayed by the display device 10 after the transmittance is adjusted is greater than or equal to the preset contrast according to the actual brightness value can be improved.

[0061] See also Fig.11 , Fig.11 This is a schematic diagram of an electronic device provided in one embodiment of the present application. The electronic device 1 further includes the display device 10 described in any of the above embodiments.

[0062] In addition, in this embodiment, the electronic device 1 further includes a back cover 20 , and the back cover 20 is used to protect the display device 10 .

[0063] The electronic device 1 includes but is not limited to a mobile phone, telephone, television, tablet computer (Pad), personal computer, notebook computer (PC), vehicle-mounted device, wearable device and other devices capable of display.

[0064] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present application, and these improvements and modifications are also regarded as the scope of protection 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 transmittance of the light-transmitting unit in the contrast enhancement module, so that after the 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.

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; Wherein, the liquid crystal layer presents different light transmittances under the control of the 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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