Display device and electronic equipment

Abstract

The present application provides a display device and an electronic device, which relate to the field of display technology, in order to solve the problem of low contrast of the display device; the display device provided by the present application includes a backlight assembly, a dimming assembly, a display panel and a first polarizer; wherein the backlight assembly is used to generate polarized light; the dimming assembly is arranged on one side of the backlight assembly, and is used to deflect or not deflect the polarized light generated by the backlight assembly; the first polarizer is arranged between the dimming assembly and the display panel; in the display device provided by the present application, when the polarized light after the dimming assembly passes through the first polarizer, if the vibration direction of the polarized light is consistent with the transmission direction of the first polarizer, the polarized light can be transmitted, and at this time, the display panel can receive light with higher light intensity; if the vibration direction of the polarized light is perpendicular to the transmission direction of the first polarizer, the polarized light cannot be transmitted, and at this time, the display panel cannot receive effective light.

Description

[0001] This application claims the priority of the Chinese patent application filed with the China Patent Office on July 31, 2020, with application number 202010763098.1 and invention name “A display device and electronic device”. Technical Field

[0002] The present application relates to the field of display technology, and in particular to a display device and an electronic device. Background Art

[0003] With the widespread application of liquid crystal displays (LCD), the use scenarios of liquid crystal displays are becoming more and more diverse. In different use scenarios, users also have different requirements for the display effects of liquid crystal displays. For example, in some use scenarios, liquid crystal displays are required to have a higher contrast performance, that is, the ratio of the brightness of the liquid crystal display in the full white screen state and the full black screen state. However, due to the backlight display principle of the liquid crystal display, as well as the limitations of the liquid crystal material and driving method in the liquid crystal display panel, the contrast of some liquid crystal displays can only reach 1500. In order to improve the contrast of the liquid crystal display, some manufacturers have begun to improve the backlight module in the liquid crystal display. For example, a direct backlight design can be adopted, the backlight module is set on the back of the liquid crystal display panel, and the number of light sources used in the backlight module is increased, so that the backlight module can adjust the brightness of some areas according to the content of the display screen, so as to assist the liquid crystal display panel to achieve a dark state effect with lower brightness and a bright state effect with higher brightness, thereby improving the overall contrast of the liquid crystal display. However, when the number of light sources configured in the backlight module is low, it is impossible to achieve high-precision brightness and darkness adjustment, so that the display effect of the liquid crystal display will be affected. When the number of light sources configured in the backlight module is low, the production cost and the overall weight of the liquid crystal display will be significantly increased in order to achieve a good bright and dark display effect. Summary of the invention

[0004] The present application provides a display device and an electronic device that are beneficial to improving the display effect of a display panel and are easy to manufacture.

[0005] On the one hand, the present application provides a display device, including a backlight assembly, a dimming assembly, a display panel and a first polarizer. Among them, the backlight assembly is used to generate polarized light, so that the display panel can provide a light source for displaying an image. The dimming assembly is arranged on one side of the backlight assembly, and is used to deflect or not deflect the polarized light generated by the backlight assembly. The first polarizer is arranged between the dimming assembly and the display panel, and is used to transmit polarized light with the same transmission direction as its own. In the display device provided by the present application, the polarized light generated by the backlight assembly must first pass through the dimming assembly. After passing through the dimming assembly, if the dimming assembly does not deflect the polarized light, the polarized light can maintain the original vibration direction and directly transmit. Or the polarized light can also be transmitted after its vibration direction is deflected by the dimming assembly. When the polarized light after the dimming assembly passes through the first polarizer, if the vibration direction of the polarized light is consistent with the transmission direction of the first polarizer, the polarized light can be transmitted. At this time, the display panel can receive light with a higher light intensity, so that a picture with a good bright state effect can be displayed. If the vibration direction of the polarized light is perpendicular to the transmission direction of the first polarizer, the polarized light cannot be transmitted. At this time, the display panel cannot receive effective light, and thus can display a picture with a good black state effect.

[0006] In a specific implementation, the dimming component may include a first substrate, a second substrate, a liquid crystal layer, and a driving circuit. Specifically, the first substrate and the second substrate are arranged opposite to each other, and the liquid crystal layer is arranged between the first substrate and the second substrate; the driving circuit is arranged on the first substrate, and is used to drive the liquid crystal in the liquid crystal layer to deflect so as to deflect the vibration direction of the polarized light. In a specific configuration, the driving circuit may include a thin film transistor and a storage capacitor, etc. It can be understood that the driving circuit is arranged on the first substrate and / or the second substrate means that the driving circuit can be arranged on the first substrate or the second substrate, and can also be arranged on both the first substrate and the second substrate.

[0007] During the manufacturing process, the first substrate and the second substrate can be made of soft materials. For example, the first substrate and the second substrate can be made of transparent polyimide (CPI) to effectively prevent phenomena such as moiré, while also effectively reducing the weight of the dimming component. It is understandable that in other embodiments, the first substrate and the second substrate can also be made of glass, polyimide (PI), tricarboxylic acid cycle (TAC), polycarbonate (PC), polyester resin (PET), etc. or materials with low optical phase delay (such as Rth <300nm) in material properties.

[0008] In addition, the first substrate and the second substrate may be made of the same material or different materials.

[0009] For example, the first substrate and the second substrate may be made of materials with different refractive indices to improve the light transmittance of the dimming component.

[0010] Alternatively, the surface of the first substrate may be subjected to a haze treatment; for example, convexities and grooves may be provided on the surface of the first substrate away from the liquid crystal layer to improve the light transmittance of the dimming component, while effectively preventing moiré and other phenomena. Alternatively, an anti-reflection film may be provided on the surface of the first substrate away from the liquid crystal layer to improve the light transmittance of the dimming component.

[0011] In other embodiments, any one of protrusions, grooves or anti-reflection films may be provided on the surface of the second substrate away from the liquid crystal layer (the upper surface in the figure). Alternatively, the above-mentioned protrusions, grooves or anti-reflection films may be provided on both the first substrate and the second substrate.

[0012] In other embodiments, in order to prevent undesirable phenomena such as moiré, a diffusion film may be provided between the display panel and the dimming component. The diffusion film may improve the viewing angle distribution of polarized light, while effectively maintaining the original vibration direction of the polarized light. For example, the diffusion film may increase the viewing angle of polarized light by more than 10°, and maintain the vibration direction of polarized light by more than 90%.

[0013] In specific configuration, the diffusion film can be arranged between the first polarizer and the first substrate, or between the first polarizer and the fourth substrate. In addition, the diffusion film can be made of materials such as polycarbonate and polyimide, and the thickness of the diffusion film can be adaptively adjusted according to actual conditions. This application does not limit this.

[0014] In addition, in order to realize functions such as human-computer interaction, a photoelectric element is also provided in the dimming component during specific implementation. When an external light source (such as an infrared laser pen used by a user) is irradiated on the display device, the external light source will pass through the display panel and the first polarizer and be transmitted in the dimming component. When the photoelectric element senses the external light source, the specific irradiation position of the external light source can be determined, thereby achieving the purpose of human-computer interaction. During specific implementation, one or more photoelectric elements can be configured in each dimming unit of the dimming component to effectively improve the accuracy of the irradiation position of the external light source.

[0015] In some implementations, the optoelectronic element may be disposed on the first substrate or the second substrate, or may be disposed on both the first substrate and the second substrate, wherein the optoelectronic element may be a photoresistor, a photodiode, a photosensitive three-laser, or the like.

[0016] When configuring the display panel, the display panel may include a panel body and a second polarizer; wherein the panel body includes a third substrate, a fourth substrate, a liquid crystal layer, a color filter, and a driving circuit. Specifically, the third substrate is arranged opposite to the fourth substrate, and the liquid crystal layer is arranged between the third substrate and the fourth substrate; the driving circuit is arranged on the third substrate, and is used to drive the liquid crystal in the liquid crystal layer to deflect so as to deflect the vibration direction of the polarized light. In the specific configuration, the driving circuit may include a thin film transistor and a storage capacitor, etc. It is understandable that the driving circuit may be arranged on the third substrate or the fourth substrate, or on both the third substrate and the fourth substrate.

[0017] The color filter is disposed on the third substrate, and when the polarized light passes through the liquid crystal layer, the light is filtered by the color filter, so that the display panel displays a color image. Alternatively, the color filter can also be disposed on the fourth substrate.

[0018] The second polarizer is arranged on the plate surface of the third substrate away from the liquid crystal layer, and is used for transmitting polarized light consistent with its transmission direction.

[0019] In addition, a plurality of pixel units may be provided in the display panel. The number of pixel units provided may be adaptively selected and adjusted according to actual needs. For example, the number of pixel units may be 1920*1080. Accordingly, in order to enable the dimming component to effectively regulate the amount of light entering each pixel unit, the dimming component may also be equipped with 1920*1080 dimming units. That is, a plurality of dimming units are arranged in a one-to-one correspondence with a plurality of pixel units, and each dimming unit may actively adjust the light transmitted to the corresponding pixel unit to effectively control the amount of light entering the pixel unit.

[0020] Alternatively, in some other implementations, the number of dimming units configured may be less than the number of pixel units configured. That is, a single dimming unit may also be configured corresponding to multiple pixel units. Alternatively, it is understood that in an area corresponding to a single dimming unit, multiple pixel units may be configured so that the single dimming unit can effectively control the amount of light entering the corresponding multiple pixel units.

[0021] In addition, the dimming component can also homogenize the light of the backlight component to improve the display effect of the display device.

[0022] For example, a plurality of backlight units may be configured in the backlight assembly, and each backlight unit may be equipped with at least one point light source. The number of backlight units may be less than the number of dimming units configured. Since the light emission of the point light source is non-uniform, that is, the light intensity at the center of the point light source is higher, while the light intensity in the area surrounding the point light source is weaker. In order to enable the display panel to receive a surface light source with uniform light intensity, the dimming assembly may perform different deflection processing on the polarized light in the area with stronger light and the area with weaker light, so that the polarized light passing through the first polarizer has uniform light intensity.

[0023] On the other hand, the present application also provides an electronic device, including a housing and the above-mentioned display device, wherein the display device is installed in the housing. Specifically, the display device is installed in the housing, and the housing can be provided with a receiving groove for fixing the display device, and when the display device is fixedly installed in the receiving groove, the display panel can be exposed on the outer surface of the housing. In specific implementation, the electronic device can be a display, a television, a mobile phone, a laptop computer, a smart watch, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic cross-sectional structure diagram of a display device provided in an embodiment of the present application;

[0025] Figure 2 A schematic cross-sectional structure diagram of a display device provided in an embodiment of the present application;

[0026] Figure 3 is a plan view schematic diagram of a backlight assembly;

[0027] Figure 4 is a plan view of a dimming component;

[0028] Figure 5 is a schematic diagram of the plane distribution of polarized light through the dimming component;

[0029] Figure 6 is a schematic diagram of the planar distribution of polarized light transmitted to the display panel;

[0030] Figure 7 A schematic cross-sectional structure diagram of another display device provided in an embodiment of the present application;

[0031] Figure 8 A schematic cross-sectional structure diagram of a dimming component provided in an embodiment of the present application;

[0032] Fig. 9 A schematic cross-sectional structure diagram of another dimming component provided in an embodiment of the present application;

[0033] Fig.10 A schematic cross-sectional structure diagram of another dimming component provided in an embodiment of the present application;

[0034] Fig.11 A schematic cross-sectional structure diagram of another dimming component provided in an embodiment of the present application;

[0035] Fig.12 A schematic cross-sectional structure diagram of another dimming component provided in an embodiment of the present application;

[0036] Fig.13 A schematic cross-sectional structure diagram of another dimming component provided in an embodiment of the present application;

[0037] Fig.14 A schematic cross-sectional structure diagram of another dimming component provided in an embodiment of the present application. DETAILED DESCRIPTION

[0038] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings.

[0039] In order to facilitate understanding of the display device provided in the embodiment of the present application, its application scenario is first introduced below.

[0040] The display device provided in the embodiment of the present application can be used in electronic devices such as monitors, mobile phones, laptops, smart watches, etc., to display information such as text and pictures, or respond to user touch, sliding and other operations to achieve the purpose of human-computer interaction.

[0041] In practical applications, widely used display devices mainly include liquid crystal displays (LCDs). Liquid crystal displays mainly include liquid crystal panels and backlight sources. Under the action of an external electric field, the arrangement direction of liquid crystal molecules changes, so that the transmittance of the backlight source changes, thereby transmitting different brightnesses to achieve the purpose of image display. However, in actual use, liquid crystal displays cannot effectively balance bright and dark images. For example, in the displayed image, some areas of the image need to reflect a higher brightness (such as a white image), and other areas of the image need to reflect a lower brightness (such as a black image). However, in actual applications, liquid crystal displays cannot effectively suppress areas with lower brightness, thereby failing to achieve a better black state effect. Therefore, it is difficult to effectively improve the contrast of liquid crystal displays.

[0042] Based on the above problems existing in current display devices, an embodiment of the present application provides a display device that can help improve contrast.

[0043] In order to make the objectives, technical solutions and advantages of the present application more clear, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0044] The terms used in the following embodiments are only for the purpose of describing specific embodiments, and are not intended to be used as limitations on the present application. As used in the specification and the appended claims of the present application, the singular expressions "one", "a kind of", "above", "the" and "this" are intended to also include expressions such as "one or more", unless there is a clear contrary indication in the context. It should also be understood that in the following embodiments of the present application, "at least one", "one or more" refer to one, two or more. The term "and / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist; for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.

[0045] References to "one embodiment" or "some embodiments" etc. described in this specification mean that a particular feature, structure or characteristic described in conjunction with the embodiment is included in one or more embodiments of the present application. Thus, the phrases "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear at different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0046] In order to facilitate understanding of the technical solution of the present application, the characteristics of polarized light are briefly introduced below.

[0047] Light is a transverse wave. Natural light (such as light emitted by ordinary light sources such as the sun and electric lights) contains light that vibrates in all directions perpendicular to the propagation direction. The process of converting natural light into polarized light is called polarization, and the optical device used for this conversion is called a polarizer (such as a polarizer). After natural light passes through the polarizer, only light whose vibration direction is consistent with the transmission direction of the polarizer can pass through. In other words, the light that passes through the polarizer only vibrates along a specific direction, and this light is called polarized light. When polarized light passes through an analyzer (such as a polarizer), if the vibration direction of the polarized light is consistent with the transmission direction of the analyzer, the polarized light can pass through. If the vibration direction of the polarized light is perpendicular to the transmission direction of the analyzer, the polarized light cannot pass through. If the vibration direction of the polarized light is set at an angle (between 0° and 90°) with the transmission direction of the analyzer, some polarized light can pass through, where the transmittance of the polarized light depends on the size of the angle, that is, the smaller the angle between the vibration direction of the polarized light and the transmission direction of the analyzer, the greater the transmittance of the polarized light, and vice versa.

[0048] The display device provided in the embodiment of the present application realizes lower dark state brightness display based on the above-mentioned characteristics of polarized light, thereby improving contrast.

[0049] like Figure 1 As shown, in a display device 10 provided in an embodiment of the present application, a backlight assembly 11, a dimming assembly 12, a display panel 13 and a first polarizer 14 are included. The backlight assembly 11 is used to generate polarized light, so as to provide the display panel 13 with light for displaying an image. The dimming assembly 12 is disposed on one side of the backlight assembly 11, and is used to deflect or not deflect the vibration direction of the polarized light generated by the backlight assembly 11. The first polarizer 14 is disposed between the dimming assembly 12 and the display panel 13, and is used to transmit polarized light with the same transmission direction as itself.

[0050] Specifically, the polarized light generated by the backlight component 11 must first pass through the dimming component 12. After passing through the dimming component 12, if the dimming component 12 does not deflect the polarized light, the polarized light can maintain the original vibration direction and directly transmit. Alternatively, the polarized light can also be transmitted after its vibration direction is deflected by the dimming component 12. When the polarized light after the dimming component 12 passes through the first polarizer 14, if the vibration direction of the polarized light is consistent with the vibration transmission direction of the first polarizer 14, the polarized light can be transmitted. At this time, the display panel 13 can receive light with a higher light intensity, so that a picture with a good bright state effect can be displayed. If the vibration direction of the polarized light is perpendicular to the vibration transmission direction of the first polarizer 14, the polarized light cannot be transmitted. At this time, the display panel 13 cannot receive effective light, so that a picture with a good black state effect can be displayed.

[0051] For example, Figure 1 As shown, when the polarized light generated by the backlight assembly 11 is polarized light S, and the transmission direction of the first polarizer 14 is consistent with the vibration direction of the polarized light S. If the dimming assembly 12 does not deflect the vibration direction of the polarized light S, the display panel 13 can receive light with a relatively high intensity.

[0052] like Figure 2 As shown, the vibration directions of polarized light S and polarized light P are perpendicular to each other. When the polarized light generated by the backlight assembly 11 is polarized light S, and the transmission vibration direction of the first polarizer 14 is consistent with the vibration direction of polarized light S. If the dimming assembly 12 deflects the vibration direction of polarized light S by 90° (i.e., the dimming assembly 12 converts polarized light S into polarized light P), when polarized light P passes through the first polarizer 14, since the transmission vibration direction of the first polarizer 14 is perpendicular to the vibration direction of polarized light S, the polarized light P will be blocked by the first polarizer 14, and the display panel 13 cannot receive effective light, so that the display panel 13 can display a picture with a good black state effect.

[0053] In a specific implementation, the dimming component 12 may be configured with a plurality of dimming units, each of which may independently adjust the vibration direction of the polarized light. Figures 3 to 6 .

[0054] like Figure 3 As shown, the backlight assembly 11 is capable of generating polarized light S.

[0055] like Figure 4 As shown, the dimming component 12 is configured with 6 dimming units, among which the dimming units 120b, 120c and 120d do not deflect the polarized light; the dimming units 120a, 120e and 120f are used to deflect the polarization direction of the polarized light by 90°.

[0056] Please refer to Figure 5 When the polarized light S of the backlight assembly 11 passes through the dimming unit 120b, the dimming unit 120c and the dimming unit 120d, the transmitted light is still the polarized light S; when the polarized light S of the backlight assembly 11 passes through the dimming unit 120a, the dimming unit 120e and the dimming unit 120f, the transmitted light is converted into the polarized light P.

[0057] Please refer to Figure 6 , shows the light and dark distribution of polarized light transmitted to the display panel 13. When polarized light S and polarized light P pass through the first polarizer 14, since the transmission vibration direction of the first polarizer 14 is consistent with the vibration direction of the polarized light S, and the transmission vibration direction of the first polarizer 14 is perpendicular to the vibration direction of the polarized light P, the polarized light S can be effectively transmitted in the area of ​​the first polarizer 14 corresponding to the dimming unit 120b, the dimming unit 120c, and the dimming unit 120d; the polarized light P is effectively blocked in the area of ​​the first polarizer 14 corresponding to the dimming unit 120a, the dimming unit 120e, and the dimming unit 120f.

[0058] In specific configuration, a plurality of pixel units may be configured in the display panel 13, and the number of dimming units may be the same as the number of pixel units. That is, a plurality of dimming units are arranged in a one-to-one correspondence with a plurality of pixel units, and each dimming unit may actively adjust the light transmitted to the corresponding pixel unit to effectively control the amount of light entering the pixel unit. Alternatively, in other embodiments, a single dimming unit may also be configured corresponding to a plurality of pixel units. Specifically, in an area corresponding to a single dimming unit, a plurality of pixel units may be configured so that a single dimming unit can effectively control the amount of light entering the corresponding plurality of pixel units.

[0059] During configuration, the dimming component 12 may have various structural forms.

[0060] For example, Figure 7 As shown, in one embodiment provided in the present application, the dimming component 12 includes a first substrate 121, a second substrate 122, a liquid crystal layer 123 and a driving circuit (not shown in the figure). Specifically, the first substrate 121 and the second substrate 122 are arranged opposite to each other, and the liquid crystal layer 123 is arranged between the first substrate 121 and the second substrate 122; the driving circuit is arranged on the first substrate 121, and is used to drive the liquid crystal in the liquid crystal layer 123 to deflect so as to deflect the vibration direction of the polarized light. In a specific configuration, the driving circuit may include a thin film transistor and a storage capacitor, etc. It can be understood that the driving circuit can be arranged on the first substrate 121 or the second substrate 122, and can also be arranged on the first substrate 121 and the second substrate 122 at the same time.

[0061] Alignment films (not shown in the figure) are provided on the surfaces of the first substrate 121 and the second substrate 122 facing the liquid crystal layer 123. When the driving circuit does not apply voltage, the arrangement of the liquid crystal molecules in the liquid crystal layer 123 will be determined by the upper and lower alignment films. Specifically, when the angle difference between the upper and lower alignment films is 90°, the arrangement of the liquid crystal molecules will automatically rotate 90 degrees from top to bottom. When the polarized light passes through the liquid crystal layer 123, since the liquid crystal molecules rotate 90° in total, the vibration direction of the polarized light is rotated 90° by the liquid crystal layer after the polarized light passes through the liquid crystal layer 123. When the driving circuit applies voltage to the liquid crystal layer 123, the arrangement direction of the liquid crystal molecules tends to be parallel to the electric field direction, so that the arrangement direction of the liquid crystal molecules tends to be arranged in the same direction, or the overall rotation direction of the liquid crystal molecules is less than 90°. When the polarized light passes through the liquid crystal layer 123, the vibration direction of the polarized light does not change, or the deflection angle of the vibration direction is less than 90°.

[0062] Correspondingly, when the angle difference between the upper and lower alignment films is 0°, the arrangement of the liquid crystal molecules is the same as the angle of the upper and lower alignment films. When polarized light passes through the liquid crystal layer 123, the polarized light is not deflected. When the drive circuit applies a voltage to the liquid crystal layer 123, the arrangement direction of the liquid crystal molecules is deflected. When the rotation angle of the liquid crystal molecules approaches 90°, after the polarized light passes through the liquid crystal layer 123, the vibration direction of the polarized light is rotated by 90° by the liquid crystal layer 123. When the rotation direction of the liquid crystal molecules is less than 90°, after the polarized light passes through the liquid crystal layer 123, the vibration direction of the polarized light is deflected by an angle less than 90°.

[0063] It is understandable that in the above-mentioned embodiment, the liquid crystal molecules change the vibration direction of the polarized light by rotating in the horizontal direction (parallel to the direction of the third substrate). In other embodiments, the deflection direction of the liquid crystal molecules can also be vertical (perpendicular to the direction of the third substrate) or three-dimensional cholesterol liquid crystal. That is, the specific type of the display panel is not limited in this application. During production, the first substrate 121 and the second substrate 122 can be made of soft materials. For example, the first substrate 121 and the second substrate 122 can be made of transparent polyimide (CPI), polyimide (polyimide, PI), tricarboxylic acid cycle (tricarboxylic acid cycle, TAC), polycarbonate (polycarbonate, PC), polyester resin (polyethylene terephthalate, PET), etc. or materials with low light phase delay (Rth<300nm) in material properties. And the board surface of the first substrate or the second substrate can be atomized to effectively prevent phenomena such as moiré, while also effectively reducing the weight of the dimming component 12. It is understandable that, in other embodiments, the first substrate 121 and the second substrate 122 may be made of the same material or different materials.

[0064] For example, the first substrate 121 and the second substrate 122 may be made of materials with different refractive indices to improve the light transmittance of the dimming component 12 .

[0065] Or, if Figure 8 As shown, any one of a protrusion 121a, a groove 121b or an anti-reflection film 121c can be provided on the surface of the first substrate 121 away from the liquid crystal layer 123 (the upper surface in the figure) to improve the transmittance of the dimming component 12.

[0066] In other embodiments, any one of the protrusions 121a, the grooves 121b, or the anti-reflection film 121c may be provided on the surface of the second substrate 122 away from the liquid crystal layer 123. Alternatively, the protrusions 121a, the grooves 121b, or the anti-reflection film 121c may be provided on both the first substrate 121 and the second substrate 122.

[0067] In a specific implementation, the display panel 13 may be a liquid crystal display panel 13 .

[0068] like Figure 7As shown, in the embodiment provided in the present application, the display panel 13 includes a panel body 131 and a second polarizer 132; wherein the panel body 131 includes a third substrate 1311, a fourth substrate 1312, a liquid crystal layer 1313, a color filter 1314 and a driving circuit (not shown in the figure). Specifically, the third substrate 1311 and the fourth substrate 1312 are arranged opposite to each other, and the liquid crystal layer 1313 is arranged between the third substrate 1311 and the fourth substrate 1312; the driving circuit is arranged on the third substrate 1311, and is used to drive the liquid crystal in the liquid crystal layer 1313 to deflect, so as to deflect the vibration direction of the polarized light. In the specific configuration, the driving circuit may include a thin film transistor and a storage capacitor, etc. It can be understood that the driving circuit can be arranged on the third substrate 1311 or the fourth substrate 1312, and can also be arranged on the third substrate 1311 and the fourth substrate 1312 at the same time.

[0069] The color filter 1314 is disposed on the third substrate 1311. When polarized light passes through the liquid crystal layer 1313, the color filter 1314 filters the light, so that the display panel 13 displays a color image. It is understandable that in other embodiments, the color filter 1314 can also be disposed on the fourth substrate 1312.

[0070] The second polarizer 132 is disposed on a surface of the third substrate 1311 away from the liquid crystal layer 1313 , and is used to transmit polarized light having the same transmission direction as the second polarizer 132 .

[0071] In order to facilitate understanding of the display principle of the display device 10, the two picture display effects of the bright state and the dark state will be specifically described below.

[0072] First, it is explained that the vibration direction of the polarized light S is consistent with the transmission direction of the first polarizer 14 and the second polarizer 132 , and the vibration directions of the polarized light S and the polarized light P are perpendicular to each other.

[0073] like Figure 7 As shown, when the display device 10 displays a bright state picture.

[0074] The backlight assembly 11 generates polarized light S (assuming that the proportion of polarized light S is 100%). When the polarized light S passes through the dimming assembly 12, the dimming assembly 12 does not deflect the vibration direction of the polarized light S. Since the vibration direction of the polarized light S is consistent with the vibration transmission direction of the first polarizer 14, the polarized light S can effectively pass through the first polarizer 14. When the polarized light S passes through the display panel 13, the liquid crystal layer in the display panel 13 does not deflect the vibration direction of the polarized light S. Since the vibration direction of the polarized light S is consistent with the vibration transmission direction of the second polarizer 132, the polarized light S can effectively pass through the second polarizer 132. In this process, since neither the first polarizer 14 nor the second polarizer 132 effectively blocks the polarized light S generated by the backlight assembly 11, the display device 10 will eventually display a bright picture.

[0075] like Fig. 9 As shown, when the display device 10 displays a dark picture.

[0076] The backlight assembly 11 generates polarized light S. When the polarized light S passes through the dimming assembly 12, the dimming assembly 12 deflects the vibration direction of the polarized light S by 90°, so that the polarized light S is converted into polarized light P. When the polarized light P passes through the first polarizer 14, since the vibration direction of the polarized light P is perpendicular to the vibration transmission direction of the first polarizer 14, the first polarizer 14 effectively blocks the polarized light P. Therefore, the display panel 13 does not receive effective light, so that a good dark state display effect can be achieved. In actual situations, since the polarized light generated by the backlight assembly 11 includes not only the polarized light S, but also a part of stray light P' (wherein the stray light P' has the same vibration direction as the polarized light P), a small amount of stray light P' will still enter the dimming assembly 12. When the stray light P' generated by the backlight assembly 11 passes through the dimming assembly 12, the vibration direction of the stray light P' is deflected by 90° under the action of the dimming assembly 12, that is, the stray light P' is converted into stray light S' (wherein the vibration direction of the stray light S' is the same as the vibration direction of the polarized light S). Since the vibration direction of the stray light S' is the same as the transmission vibration direction of the first polarizer 14, this part of the stray light S' will be transmitted into the display panel 13. At this time, the liquid crystal layer 1313 in the display panel 13 will deflect the vibration direction of the stray light S' by 90° to convert the stray light S' into stray light P' (wherein the vibration direction of the stray light P' is the same as the polarized light P). Since the vibration direction of the stray light P' is perpendicular to the transmission vibration direction of the second polarizer 132, the second polarizer 132 effectively blocks the stray light P'. In this process, since the first polarizer 14 effectively blocks the polarized light P, and the second polarizer 132 effectively blocks the stray light P′, the display device 10 will eventually display a dark picture.

[0077] It is understandable that, in other embodiments, the vibration transmission directions of the first polarizer 14 and the second polarizer 132 may also be perpendicular to each other; or, the vibration direction of the polarized light S generated by the backlight assembly 11 may also be perpendicular to the vibration transmission direction of the first polarizer 14. Accordingly, when processing polarized light, the liquid crystal layer 123 in the dimming assembly 12 and the liquid crystal layer 1313 in the display panel 13 may also be deflected to the polarization direction of the polarized light according to the desired display effect. In addition, in terms of structural setting, the first polarizer 14 may be attached to the surface of the fourth substrate 1312 away from the liquid crystal layer 1313 (the lower surface in the figure), or the first polarizer 14 may be attached to the surface of the first substrate 121 away from the liquid crystal layer 123 (the upper surface in the figure), and this application does not make specific limitations on this.

[0078] In addition, during the specific setting, a certain gap is maintained between the display panel 13 and the dimming component 12 to prevent the occurrence of undesirable phenomena such as moiré. The width of the gap can be maintained at more than 0.5 μm. Or in another embodiment, the display panel 13 and the dimming component 12 can also be arranged in a laminated manner. For example, a glue layer with a certain thickness can be provided between the display panel 13 and the dimming component 12 to laminate and fix the display panel 13 and the dimming component 12.

[0079] like Fig.10 As shown, in order to improve the display effect of the display device 10 and prevent undesirable phenomena such as moiré, a diffusion film 15 can be further provided between the display panel 13 and the dimming component 12. The diffusion film 15 can improve the viewing angle distribution of the polarized light, and can also effectively maintain the original vibration direction of the polarized light. For example, the diffusion film 15 can increase the viewing angle of the polarized light by more than 10°, and can maintain the vibration direction of the polarized light by more than 90%.

[0080] In specific configuration, the diffusion film 15 can be disposed between the first polarizer 14 and the first substrate 121, or between the first polarizer 14 and the fourth substrate 1312. In addition, the diffusion film 15 can be made of materials such as polycarbonate and polyimide, and the thickness of the diffusion film 15 can be adaptively adjusted according to actual conditions. This application does not limit this.

[0081] It should be noted that, in order to facilitate understanding of the technical solution of the present application, in the above-mentioned embodiments, the polarized light is linearly polarized light, and the first polarizer 14 and the second polarizer 132 are both linear polarizers. It is understandable that in other embodiments, when the polarized light is circularly polarized light or elliptically polarized light, the first polarizer 14 is a circular polarizer, and the second polarizer 132 is a circular polarizer, the same is still applicable. For example, when the polarized light generated by the backlight assembly 11 is circularly polarized light, the first polarizer 14 and the second polarizer 132 can both be linear polarizers, or the first polarizer 14 and the second polarizer 132 can both be circular polarizers.

[0082] In addition, in order to improve the display effect of the display device 10, the polarization rate of the light generated by the backlight assembly 11 can be greater than or equal to 75%. That is, among the light generated by the backlight assembly 11, the proportion of polarized light with the same vibration direction is greater than or equal to 75% (for example, the proportion of polarized light S is greater than or equal to 75%, and the proportion of polarized light P' is less than or equal to 25%).

[0083] In practical applications, the display device 10 may not only have the function of image display, but also realize human-computer interaction.

[0084] like Fig.11 As shown, in one embodiment provided in the present application, a photoelectric element 124 (five are shown in the figure) is also provided in the dimming component 12. When an external light source (such as an infrared laser pen used by a user) is irradiated on the display device 10, the external light source will pass through the display panel 13 and the first polarizer 14, and be transmitted in the dimming component 12. When the photoelectric element 124 senses the external light source, the specific irradiation position of the external light source can be determined, thereby achieving the purpose of human-computer interaction. In a specific implementation, a photoelectric element 124 can be configured in each dimming unit of the dimming component 12 to effectively improve the accuracy of the irradiation position of the external light source.

[0085] In a specific implementation, the photoelectric element 124 can be disposed on the first substrate 121 or the second substrate 122, or on both the first substrate 121 and the second substrate 122. The photoelectric element 124 can be a photoresistor, a photodiode, a photosensitive three-laser, or the like.

[0086] In addition, the specific structural arrangement of the backlight assembly 11 may also be varied.

[0087] For example, the backlight assembly 11 may adopt an edge-type backlight design or a direct-type backlight setting.

[0088] like Fig.12As shown, specifically, when the backlight assembly 11 adopts an edge-entry backlight design, the backlight assembly 11 may include a side light source 111 and a light guide plate 112 to form a surface light source on one side of the dimming assembly 12. The number and position of the side light sources 111 can be reasonably adjusted according to actual needs. For example, the side light source 111 can be set only on one side (the left side in the figure), and the number of the side light sources 111 can be set to one or more (shown in the figure).

[0089] like Fig.13 As shown, when the backlight assembly 11 adopts a direct-down design, the backlight assembly 11 may include a plurality of point light sources 113 (five are shown in the figure), wherein the device of the point light source 113 may specifically be a light emitting diode, and the plurality of point light sources 113 may be arranged in an array. In a specific arrangement, a single point light source 113 may constitute a backlight unit, or a backlight unit may also be composed of a plurality of point light sources. For example, 2*2 point light sources may constitute a backlight unit, and 3*4 point light sources may also constitute a backlight unit.

[0090] In addition, in the embodiment provided in the present application, the dimming component 12 can also perform homogenization processing on the light of the backlight component 11 to enhance the display effect of the display device 10 .

[0091] like Fig.14 As shown, since the light emission of the point light source 113 is non-uniform, that is, the light intensity at the center of the point light source 113 is higher, while the light intensity in the area around the point light source 113 is weaker. For example, the center area of ​​the point light source 113 can generate 100% polarized light S, the left area can generate 80% polarized light S, and the right area can generate 70% polarized light S. In order to enable the display panel 13 to receive polarized light with uniform light intensity, the portion of the dimming component 12 corresponding to the center area of ​​the point light source 113 can deflect the vibration direction of the polarized light, and the deflected polarized light can be decomposed into 70% polarized light S and 30% polarized light P. Correspondingly, the portion of the dimming component 12 corresponding to the left area of ​​the point light source 113 can deflect the vibration direction of the polarized light S, and the deflected polarized light can be decomposed into 70% polarized light S and 10% polarized light P. The portion of the dimming component 12 corresponding to the right area of ​​the point light source 113 does not deflect the vibration direction of the polarized light S. The vibration directions of the polarized light S and the polarized light P are perpendicular to each other, and the transmission direction of the first polarizer 14 is consistent with the vibration direction of the polarized light S. Since the first polarizer 14 can transmit the polarized light S and block the polarized light P, the display panel 13 receives 70% of the polarized light S. That is, different areas (dimming units) of the dimming component 12 can independently adjust the polarized light of the backlight component 11, so that the display panel 13 can receive a surface light source with uniform light intensity.

[0092] In addition, the embodiment of the present application further provides an electronic device, including a housing and the above-mentioned display device 10, wherein the display device 10 is installed in the housing. Specifically, the display device 10 is installed in the housing, and the housing can be provided with a receiving groove for fixing the display device 10. When the display device 10 is fixedly installed in the receiving groove, the display panel 13 can be exposed on the outer surface of the housing. In a specific implementation, the electronic device can be a display, a television, a mobile phone, a laptop computer, a smart watch, etc.

[0093] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A display device, characterized in that: include: A backlight assembly for generating polarized light; A dimming component, disposed on one side of the backlight component, for deflecting the vibration direction of the polarized light; A display panel is arranged on one side of the dimming component, and the dimming component is located between the backlight component and the display panel; A first polarizer, disposed between the dimming component and the display panel, and configured to transmit polarized light having the same polarization direction as its own; The dimming component is used to perform different deflection processing on polarized light in the strong light area and weak light area of ​​the backlight assembly, so that the polarized light passing through the first polarizer has uniform light intensity.

2. The display device according to claim 1, characterized in that The dimming component comprises: a first substrate; a second substrate, arranged opposite to the first substrate; a liquid crystal layer, disposed between the first substrate and the second substrate; The driving circuit is disposed on the first substrate and / or the second substrate, and is used to drive the liquid crystal in the liquid crystal layer to deflect, so as to deflect the vibration direction of the polarized light.

3. The display device according to claim 2, characterized in that: The first substrate and the second substrate have different refractive indices.

4. The display device according to claim 2 or 3, characterized in that: A protrusion, a groove or an anti-reflection film is arranged on a surface of the first substrate away from the liquid crystal layer.

5. The display device according to claim 2 or 3, characterized in that: A protrusion, a groove or an anti-reflection film is arranged on a surface of the second substrate away from the liquid crystal layer.

6. The display device according to claim 2 or 3, characterized in that: The dimming component also includes a photoelectric element; The photoelectric element is disposed in the first substrate or the second substrate, and is used to sense an optical signal transmitted from one side of the display panel.

7. The display device according to claim 2 or 3, characterized in that: The display panel includes a panel body and a second polarizer; The second polarizer is arranged on a side of the panel body away from the first polarizer.

8. The display device according to any one of claims 1 to 3, characterized in that: The display device further includes a diffusion film, and the diffusion film is arranged between the dimming component and the first polarizer, or the diffusion film is arranged between the display panel and the first polarizer.

9. The display device according to any one of claims 1 to 3, characterized in that: The display panel is configured with a plurality of pixel units, and the dimming component is configured with a plurality of dimming units; The number of the dimming units is less than or equal to the number of the pixel units.

10. The display device according to claim 9, characterized in that: The backlight assembly is configured with a plurality of backlight units; The number of the backlight units is less than the number of the dimming units.

11. An electronic device, characterized in that: The invention comprises a housing and a display device as claimed in any one of claims 1 to 10, wherein the display device is mounted on the housing.

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