Light shielding module, display device, and electronic device

Abstract

An optical shading module, a display device and an electronic device, the optical shading module is used for the display device, the display device further comprises a display module and a light-emitting module, the light-emitting module, the optical shading module and the display module are sequentially stacked, the light-emitting module is used for emitting light to the optical shading module, the display module is used for receiving light for display, the optical shading module comprises a device layer and a crystal layer, the crystal layer is stacked on the surface of the device layer facing the display module, the device layer is used for vibration to emit ultrasonic waves to the crystal layer, the crystal layer is used for receiving ultrasonic waves and switching from a first state to a second state, wherein, when the crystal layer is in the first state, the crystal layer is a light-transmitting component to make the optical shading module transparent; when the crystal layer is in the second state, the crystal layer is a non-light-transmitting component to make the optical shading module opaque, so that when the display module is in a non-display state, the display module will not receive light from the light-emitting module, avoiding the generation of halo and scattering phenomenon.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a light shielding module, a display device and an electronic equipment. BACKGROUND

[0002] With the increasing demand for display product picture quality, the halo or scattering phenomenon around the high brightness area of the screen has become an important factor affecting the picture quality. In the prior art, display partitions are usually increased or light absorbing layers are arranged between the display partitions to prevent light interference between the partitions. However, due to mechanical damage or material attenuation, the liquid crystal structure may have a light leakage phenomenon, and the display may still have a halo or scattering phenomenon to affect the picture quality. SUMMARY

[0003] The purpose of the present application is to provide a light shielding module, a display device and an electronic equipment to solve the problem of halo or scattering around the high brightness area of the screen.

[0004] To achieve the purpose of the present application, the present application provides the following technical solutions:

[0005] In a first aspect, the present application provides a light shielding module for a display device, the display device further comprising a display module and a light emitting module, the light emitting module, the light shielding module and the display module being sequentially stacked, the light emitting module being configured to emit light to the light shielding module, and the display module being configured to receive the light for display; the light shielding module comprising a device layer and a crystal layer, the crystal layer being stacked on a surface of the device layer facing the display module, the device layer being configured to vibrate to emit ultrasonic waves to the crystal layer, and the crystal layer being configured to receive the ultrasonic waves and switch from a first state to a second state; wherein, when the crystal layer is in the first state, the crystal layer is a light-transmitting member to make the light shielding module transmit light; and when the crystal layer is in the second state, the crystal layer is a light-blocking member to make the light shielding module block light.

[0006] In an embodiment, the device layer comprises a first electrode layer, a second electrode layer and a vibration layer, the first electrode layer and the second electrode layer being oppositely spaced, the vibration layer being arranged between the first electrode layer and the second electrode layer, and the crystal layer being stacked on a surface of the first electrode layer facing away from the second electrode layer, the first electrode layer and the second electrode layer being configured to input electrical signals to drive the vibration layer to vibrate.

[0007] In an embodiment, the material of the vibration layer comprises any one or a combination of multiple of barium titanate, lithium niobate, sodium bismuth titanate and quartz.

[0008] In an embodiment, the material of the crystal layer comprises a combination of any one or more of lithium tantalate crystal, silicon crystal, lithium niobate crystal, barium titanate crystal, and potassium-sodium niobate crystal.

[0009] In an embodiment, the device layer further comprises a support layer, which is arranged between the first electrode layer and the second electrode layer and connected with the vibration layer, and the support layer has at least one cavity, and the gas in the cavity is used to vibrate under the driving of the vibration layer.

[0010] In an embodiment, the device layer further comprises a first insulating layer and a second insulating layer, the first insulating layer is arranged on the surface of the first electrode layer facing the second electrode layer, and the second insulating layer is arranged on the surface of the second electrode layer facing the first electrode layer.

[0011] In an embodiment, the display module comprises a plurality of display units arranged in an array, the light shielding module comprises a plurality of light shielding areas corresponding to the plurality of display units one by one, the crystal layer in the light shielding area corresponding to the display unit emitting light is in the first state, and the crystal layer in the light shielding area corresponding to the display unit not emitting light is in the second state.

[0012] In a second aspect, the present application further provides a display device, comprising a display module, a light emitting module, and the light shielding module of any one of the embodiments of the first aspect, the light emitting module, the light shielding module, and the display module are sequentially stacked, the light emitting module is used to emit light to the light shielding module, and the display module is used to receive the light for display.

[0013] In an implementation form, the display module comprises a plurality of display units arranged in an array, the light shielding module comprises a plurality of light shielding areas corresponding to the plurality of display units one by one, the crystal layer in the light shielding area corresponding to the display unit emitting light is in the first state, and the crystal layer in the light shielding area corresponding to the display unit not emitting light is in the second state; the display device further comprises a plurality of non-circuit units corresponding to the plurality of display units one by one, and the plurality of non-circuit units are electrically connected to the device layer in the plurality of light shielding areas and the plurality of display units respectively; when the display unit emits light, the display unit outputs a first signal to the non-circuit unit, and the non-circuit unit outputs a second signal to the device layer in the corresponding light shielding area, so that the crystal layer in the corresponding light shielding area is in the first state; when the display unit does not emit light, the display unit outputs the second signal to the non-circuit unit, and the non-circuit unit outputs the first signal to the device layer in the corresponding light shielding area, so that the crystal layer in the corresponding light shielding area is in the second state, and the first signal and the second signal have the same amplitude and opposite phases.

[0014] In a third aspect, the present application further provides an electronic device comprising the display device according to any one of the display devices in the embodiments of the second aspect.

[0015] By arranging the light shielding module between the display module and the light emitting module, the light shielding module comprises a device layer and a crystal layer, the crystal layer is arranged on the surface of the device layer facing the display module, the device layer is used to vibrate to emit ultrasonic waves to the crystal layer, and the crystal layer is used to receive the ultrasonic waves and switch from the first state to the second state, wherein when the crystal layer is in the first state, the crystal layer is a light-transmitting component to make the light shielding module transmit light; when the crystal layer is in the second state, the crystal layer is a light-blocking component to make the light shielding module block light, so that when the display module is in a non-display state, the display module will not receive light from the light emitting module, thereby avoiding the generation of halo and scattering phenomena. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0017] Figure 1 is a schematic diagram of a display module of an embodiment;

[0018] Figure 2 is a schematic diagram of a display device of an embodiment;

[0019] Figure 3 is a schematic view of a display device according to another embodiment;

[0020] Figure 4 is a schematic view of a display device according to another embodiment.

[0021] BRIEF DESCRIPTION OF DRAWINGS

[0022] 1000 - display device;

[0023] 100 - shading module;

[0024] 10 - device layer, 11 - first electrode layer, 12 - second electrode layer, 13 - vibration layer, 14 - support layer, 141 - cavity, 142 - partition, 15 - first insulating layer, 16 - second insulating layer;

[0025] 20 - crystal layer;

[0026] 30 - shading area, 31 - first shading area, 32 - second shading area, 33 - third shading area;

[0027] 40 - substrate layer;

[0028] 200 - display module, 201 - display unit, 2011 - first display unit, 2012 - second display unit, 2013 - third display unit, 202 - source driving chip, 203 - gate driving chip, 204 - scan line, 205 - data line;

[0029] 300 - light emitting module;

[0030] 400 - shading driving chip;

[0031] 500 - non-circuit unit;

[0032] 600 - common power supply. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0034] It should be noted that when a component is referred to as being "fixed" to another component, it can be directly on the other component or there can be an intervening component. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or there can be an intervening component.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application. The use herein of the terms "and / or" includes a set of one or more associated listed items.

[0036] Some embodiments of the present application are described in detail below with reference to the accompanying drawings. The following examples and features in the examples can be combined with each other in the case of no conflict.

[0037] Referring to Figure 1 The present application provides an electronic device, which can be an electronic reader, a television, an electronic book, a display, a mobile phone, or the like, and includes the display device 1000 of the embodiments of the present application.

[0038] Referring to Figures 1 to 3 The present application also provides a display device 1000, which includes a display module 200, a light-emitting module 300, and the light-blocking module 100 of the embodiments of the present application. The light-emitting module 300, the light-blocking module 100, and the display module 200 are sequentially stacked. The light-emitting module 300 is configured to emit light to the light-blocking module 100, and the display module 200 is configured to receive the light for display.

[0039] When the display device 1000 is a Mini LED display screen, the light-emitting module 300 includes a plurality of LED lamp beads arranged in an array, and the size of the LED lamp beads is between 100 and 200 microns to achieve fine local dimming, so that the screen can display different brightness in different areas, thereby improving the contrast and image details. The display module 200 includes a plurality of display units 201 arranged in an array. Each display unit 201 includes one pixel, and each pixel includes three sub-pixels. Alternatively, each display unit 201 includes a plurality of pixels, and each pixel includes three sub-pixels that can emit red light, green light, and blue light, respectively. Each sub-pixel corresponds to one LED lamp bead.

[0040] In one embodiment, when the display device 1000 displays, the LED lamp beads in different display units 201 emit light of different intensities to the corresponding sub-pixels according to image data. In another embodiment, when the display device 1000 displays, the plurality of LED lamp beads on the light-emitting module 300 emit light at the same time. The display module 200 can also include a liquid crystal layer. A plurality of liquid crystals in the liquid crystal layer deflect or change physical states under the control of corresponding scanning signals and corresponding data signals, so that the light emitted by the light-emitting module 300 can be projected onto the corresponding position of the screen through structures such as liquid crystals and polarizing plates to form an image.

[0041] Since the LED lamp bead is a point light source, and the liquid crystal and the polarizing plate and other structures are affected by environmental factors or material attenuation and other factors, when the display device 1000 displays, one of the display units 201 of the display device 1000 is affected by the light received by other display units 201 to appear halo or scattering phenomenon, and the risk of halo or scattering phenomenon appearing in the surrounding area of the display unit 201 with higher brightness is higher, so the light shielding module 100 in the embodiment of the application is arranged, the light shielding module 100 can control the light emitted by the light emitting module 300 to the display module 200, to prevent the light of different display units 201 from affecting each other to appear halo or scattering phenomenon.

[0042] Optionally, when the display device 1000 is an LCD display, the light source of the light emitting module 300 can directly emit light to the display module 200, and the light source can also be arranged on the side of the light emitting module 300 and emit light to the display module 200 through reflection or refraction of the light guide structure, which is not limited. Since the light emitting module 300 fails or the liquid crystal fails, there is also a risk of appearing halo or scattering phenomenon, so the light shielding module 100 in the embodiment of the application can also prevent the light of different display units 201 from affecting each other to appear halo or scattering phenomenon.

[0043] Please refer to Figure 2 and Figure 3 , the application provides a light shielding module 100 for a display device 1000, the display device 1000 further comprises a display module 200 and a light emitting module 300, the light emitting module 300, the light shielding module 100 and the display module 200 are sequentially stacked, the light emitting module 300 is used for emitting light to the light shielding module 100, the display module 200 is used for receiving light for display, the light shielding module 100 comprises a device layer 10 and a crystal layer 20, the crystal layer 20 is stacked on the surface of the device layer 10 facing the display module 200, the device layer 10 is used for vibration to emit ultrasonic waves to the crystal layer 20, the crystal layer 20 is used for receiving ultrasonic waves and switching from a first state to a second state, wherein, when the crystal layer 20 is in the first state, the crystal layer 20 is a light transmission member to make the light shielding module 100 transparent; when the crystal layer 20 is in the second state, the crystal layer 20 is a light blocking member to make the light shielding module 100 light shielding.

[0044] Optionally, when the device layer 10 stops vibrating, that is, the device layer 10 stops emitting ultrasonic waves to the crystal layer 20, the crystal layer 20 can switch from the second state to the first state, or when the vibration frequency of the device layer 10 changes, that is, the device layer 10 emits ultrasonic waves with different frequencies to the crystal layer 20, the crystal layer 20 can switch from the second state to the first state.

[0045] Optionally, the device layer 10 can vibrate at the same frequency or different frequencies in different time periods, such as frames, seconds, milliseconds, etc., without limitation, so that the crystal layer 20 is in the first state or the second state in different time periods.

[0046] Optionally, the crystal layer 20 is a layered structure or a thin film structure formed by a photonic crystal, which is a man-made microstructure light-transmitting body composed of media with different refractive indexes arranged periodically, and has a photonic bandgap characteristic. When the photonic crystal of the crystal layer 20 receives the ultrasonic waves emitted by the vibration of the device layer 10, the crystal layer 20 undergoes Bragg diffraction, that is, the crystal layer 20 undergoes reversible and periodic strain under the action of the ultrasonic waves, thereby changing the refractive index and density distribution of the crystal layer 20. Since the photonic bandgap of the crystal layer 20 depends on the periodic change of the crystal, any change will affect the position of the photonic bandgap, and the light waves within the bandgap range cannot propagate. Therefore, the wavelength within the bandgap range of the photonic bandgap of the crystal layer 20 is modulated to the wavelength of the light emitted by the light-emitting module 300 by the ultrasonic waves. When the ultrasonic waves emitted by the device layer 10 act on the crystal layer 20 and cause the crystal layer 20 to undergo Bragg diffraction, the wavelength of the light emitted by the light-emitting module 300 is located in the photonic bandgap and cannot pass through the crystal layer 20, thereby achieving light shielding.

[0047] Optionally, the material of the crystal layer 20 includes any one or a combination of multiple of lithium tantalate crystal, silicon crystal, lithium niobate crystal, barium titanate crystal, and potassium sodium niobate crystal, without limitation, so that the light shielding module 100 can use a crystal layer 20 with different materials according to different light-emitting modules 300 to prevent the occurrence of light halo and scattering phenomena. For example, the material of the crystal layer 20 is lithium tantalate.

[0048] Optionally, the device layer 10 and the crystal layer 20 can be bonded by an optical transparent adhesive (OCA adhesive) to ensure that light can pass through and prevent the device layer 10 from separating from the crystal layer 20 when the device layer 10 vibrates.

[0049] Optionally, the light shielding module 100 can cover all the display units 201 of the aforementioned display device 1000, and the display device 1000 includes a plurality of light shielding areas 30 corresponding to the plurality of display units 201 one by one. The light shielding module 100 can vibrate the device layer 10 in each light shielding area 30 and emit ultrasonic waves to the corresponding crystal layer 20 to make the corresponding area of the crystal layer 20 in the second state, so that the corresponding display unit 201 does not have light halo and scattering phenomena.

[0050] Optionally, the light shielding module 100 can also be multiple, and the multiple light shielding modules 100 are arranged one-to-one corresponding to the multiple pixels or the multiple sub-pixels. The display device 1000 can vibrate different areas of the device layer 10 and emit ultrasonic waves to the corresponding crystal layer 20 to make the corresponding areas of the crystal layer 20 in the second state, so that the display unit 201 corresponding to some pixels or some sub-pixels will not have the light halo and scattering phenomenon.

[0051] For example, the light shielding module 100 shown in Figure 2 and Figure 3 , Figure 2 and Figure 3 has a first light shielding area 31, a second light shielding area 32 and a third light shielding area 33, and the display module 200 has a first display unit 2011, a second display unit 2012 and a third display unit 2013, which correspond to the first light shielding area 31, the second light shielding area 32 and the third light shielding area 33 respectively. When the first display unit 2011 and the third display unit 2013 both display light emission, and the second display unit 2012 does not display light emission, the device layer 10 in the first light shielding area 31 and the third light shielding area 33 does not vibrate or vibrates at another different frequency to make the crystal layer 20 in the first light shielding area 31 and the third light shielding area 33 in the first state, and the device layer 10 in the second light shielding area 32 vibrates to make the crystal layer 20 in the second light shielding area 32 in the second state, so that the light emitted by the light emitting module 300 can pass through the first light shielding area 31 and the third light shielding area 33 to illuminate the first display unit 2011 and the third display unit 2013, and the light emitted by the light emitting module 300 cannot illuminate the second display unit 2012 due to the light shielding effect of the second light shielding area 32, so that the second display unit 2012 will not have the light halo and scattering phenomenon.

[0052] By arranging the light shielding module 100 between the display module 200 and the light emitting module 300, the light shielding module 100 includes the device layer 10 and the crystal layer 20, the crystal layer 20 is stacked on the surface of the device layer 10 facing the display module 200, the device layer 10 is used to vibrate to emit ultrasonic waves to the crystal layer 20, and the crystal layer 20 is used to receive the ultrasonic waves and switch from the first state to the second state. Wherein, when the crystal layer 20 is in the first state, the crystal layer 20 is a light-transmitting member to make the light shielding module 100 transparent; when the crystal layer 20 is in the second state, the crystal layer 20 is a non-light-transmitting member to make the light shielding module 100 light shielding, so that when the display module 200 is in a non-display state, the display module 200 will not receive light from the light emitting module 300, avoiding the light halo and scattering phenomenon.

[0053] For example, the light shielding module 100 shown in Figure 2 and Figure 3The device layer 10 comprises a first electrode layer 11, a second electrode layer 12 and a vibration layer 13, the first electrode layer 11 is oppositely spaced apart from the second electrode layer 12, the vibration layer 13 is arranged between the first electrode layer 11 and the second electrode layer 12, and the crystal layer 20 is arranged on the surface of the first electrode layer 11 away from the second electrode layer 12 in a stacked manner, and the first electrode layer 11 and the second electrode layer 12 are used to input an electrical signal to drive the vibration layer 13 to vibrate.

[0054] Optionally, the vibration layer 13 is a layered structure or a thin film structure formed of a piezoelectric material, the piezoelectric material refers to a crystal material that generates a voltage between two end faces when subjected to a pressure, at the same time, the piezoelectric material can also convert electrical energy into mechanical energy, that is, convert an electrical signal into mechanical vibration, and the vibration layer 13 can vibrate at different frequencies according to different intensities of the electric field to generate ultrasonic waves of different frequencies. The frequency of the ultrasonic wave is consistent with the frequency of the electrical signal, and the ultrasonic wave can act on the crystal layer 20 to make the crystal layer 20 produce a strain, so as to change the lattice spacing of the crystal layer 20, so that the light in a specific wavelength range cannot pass through the crystal layer 20 to achieve light shielding.

[0055] Optionally, the material of the vibration layer 13 includes any one or a combination of multiple of barium titanate, lithium niobate, sodium bismuth titanate and quartz, without limitation, so that the light shielding module 100 can adopt the vibration layer 13 of different materials according to different light emitting modules 300 to realize the function of preventing the occurrence of light halo and scattering phenomenon. Exemplarily, the material of the vibration layer 13 is barium titanate. Optionally, the first electrode layer 11 and the second electrode layer 12 can be transparent conductive materials or low-resistivity opaque conductive materials, and can be indium tin oxide or indium zinc oxide, without limitation.

[0056] Among them, please refer to Figure 1 The display module 200 comprises a plurality of display units 201 arranged in an array, the light shielding module 100 comprises a plurality of light shielding areas 30 corresponding to the plurality of display units 201 one by one, the crystal layer 20 in the light shielding area 30 corresponding to the light-emitting display unit 201 is in the first state, and the crystal layer 20 in the light shielding area 30 corresponding to the non-light-emitting display unit 201 is in the second state. Each display unit 201 comprises a pixel, and each pixel comprises three sub-pixels, or each display unit 201 comprises a plurality of pixels, and each pixel comprises three sub-pixels, without limitation.

[0057] At the same time, please refer to Figure 1The display module 200 further comprises a source driving chip 202, a gate driving chip 203, a plurality of scanning lines 204 and a plurality of data lines 205. The source driving chip 202 is electrically connected to the pixels or sub-pixels in each row of the plurality of display units 201 through the plurality of scanning lines 204, and is configured to output a scanning signal to the pixels or sub-pixels in the plurality of display units 201 to turn on the pixels or sub-pixels in the display units 201. The gate driving chip 203 is electrically connected to the pixels or sub-pixels in each column of the plurality of display units 201 through the plurality of data lines 205, and is configured to output a driving signal to the pixels or sub-pixels in the plurality of display units 201 to make the pixels or sub-pixels in the plurality of display units 201 emit light.

[0058] In an embodiment, referring to Figures 1 to 3 The display device 1000 comprises a light-shielding driving chip 400, one of the first electrode layer 11 and the second electrode layer 12 is electrically connected to a common power supply 600, and the other is electrically connected to the light-shielding driving chip 400. The light-shielding driving chip 400 is configured to input an electrical signal to one of the first electrode layer 11 and the second electrode layer 12.

[0059] For example, the first electrode layer 11 is electrically connected to the light-shielding driving chip 400, and the second electrode layer 12 is electrically connected to the common power supply 600. The first electrode layer 11 comprises a plurality of plates corresponding to the plurality of display units 201, each plate is insulated from each other, and each plate is electrically connected to the light-shielding driving chip 400. The second electrode layer 12 is electrically connected to the light-shielding driving chip 400, and the first electrode layer 11 is electrically connected to the common power supply 600. The embodiment is similar to the foregoing embodiment, and details are not repeated here.

[0060] The light-shielding driving chip 400 outputs different electrical signals to different plates of the first electrode layer 11 to make different plates conductive, so that the vibration layer 13 vibrates different regions corresponding to different plates to emit ultrasonic waves with the same frequency as the electrical signal, so that the crystal layer 20 in the light-shielding area 30 corresponding to the display unit 201 that emits light is in the first state, and the crystal layer 20 in the light-shielding area 30 corresponding to the display unit 201 that does not emit light is in the second state, preventing the light from different display units 201 from affecting each other and causing light halo or scattering phenomenon.

[0061] Optionally, the light-shielding driving chip 400 can be electrically connected to the source driving chip 202 and / or the gate driving chip 203 of the display module 200, so that whether each light-shielding area 30 is light-shielded or not corresponds one-to-one to whether each display unit 201 emits light or not.

[0062] Optionally, the common power supply 600 can be a ground port arranged outside the shading module 100, the display module 200, the light-emitting module 300, and the shading driving chip 400. The second electrode layer 12 can also be electrically connected to the light-emitting module 300 through conductive tape and metal wires, so that the second electrode layer 12 is grounded through the ground port on the light-emitting module 300, that is, the light-emitting module 300 and the shading module 100 share the same ground port, without limitation.

[0063] The shading driving chip 400 is arranged outside the device layer 10. In one embodiment, the shading driving chip 400 is electrically connected to the first electrode layer 11 through metal traces. Optionally, a plurality of output terminals of the shading driving chip 400 can be electrically connected to a plurality of electrode plates on the first electrode layer 11 one by one through a plurality of wires. For example, any one of the layers adjacent to the first electrode layer 11 and connected to the first electrode layer 11 in the stacking direction of the device layer 10 can be provided with a trace hole to allow the plurality of wires to pass through.

[0064] In another embodiment, the device layer 10 further comprises a first insulating layer 15 arranged on the surface of the first electrode layer 11 facing the second electrode layer 12. The first insulating layer 15 is provided with a metal layer (not shown) in which metal traces are arranged and electrically connected to the plurality of electrode plates of the first electrode layer 11 one by one. The metal layer is also electrically connected to the shading driving chip 400. Optionally, the metal layer can also be arranged in any layer structure adjacent to the first electrode layer 11, without limitation.

[0065] In another embodiment, please refer to Figures 2 to 4 The display device 1000 further comprises a plurality of non-circuit units 500 corresponding to the plurality of display units 201. The plurality of non-circuit units 500 are respectively electrically connected to the device layer 10 in the plurality of shading areas 30 and the plurality of display units 201. When the display unit 201 emits light, the display unit 201 outputs a first signal to the non-circuit unit 500, and the non-circuit unit 500 outputs a second signal to the device layer 10 in the corresponding shading area 30, so that the crystal layer 20 in the corresponding shading area 30 is in the first state. When the display unit 201 does not emit light, the display unit 201 outputs a second signal to the non-circuit unit 500, and the non-circuit unit 500 outputs a first signal to the device layer 10 in the corresponding shading area 30, so that the crystal layer 20 in the corresponding shading area 30 is in the second state. The amplitudes of the first signal and the second signal are the same and the phases are opposite, preventing the light of different display units 201 from affecting each other and causing halo or scattering phenomenon.

[0066] The non-circuit unit 500 is configured to output the inverted signal. For example, when the signal input into the non-circuit unit 500 is high, the non-circuit unit 500 outputs a low signal with the same amplitude but opposite phase. When the signal input into the non-circuit unit 500 is low, the non-circuit unit 500 outputs a high signal with the same amplitude but opposite phase.

[0067] Each non-circuit unit 500 is electrically connected to the first electrode layer 11 or the second electrode layer 12 of the device layer 10 in each light-shielding area 30, and is also electrically connected to the scan line 204 or the data line 205 in each display unit 201. When the scan line 204 and the data line 205 in the display unit 201 output a scanning signal or a driving signal to the plurality of pixels or the plurality of sub-pixels in the display unit 201, the corresponding non-circuit unit 500 can output a first signal or a second signal to the device layer 10 according to the scanning signal or the driving signal, so that the crystal layer 20 in the corresponding light-shielding area 30 is in a first state or a second state, thereby preventing the light from different display units 201 from affecting each other and causing the light halo or scattering phenomenon.

[0068] Optionally, when each non-circuit unit 500 is electrically connected to the data line 205 in each display unit 201, the first signal is a driving signal. When each non-circuit unit 500 is electrically connected to the scan line 204 in each display unit 201, the first signal is a scanning signal. Optionally, the first signal is high, and the second signal is low.

[0069] For example, the plurality of non-circuit units 500 are electrically connected to the plurality of plates of the first electrode layer 11 one by one. The connection mode between the plurality of non-circuit units 500 and the first electrode layer 11 is similar to the connection mode between the light-shielding driving chip 400 and the first electrode layer 11, and details are not repeated here.

[0070] Optionally, the display device 1000 can be simultaneously provided with the light-shielding driving chip 400 and the plurality of non-circuit units 500 to cooperatively control the light-shielding module 100, so that when one of the light-shielding driving chip 400 and the plurality of non-circuit units 500 is damaged or fails, the other can still control the light-shielding module 100.

[0071] For details, please refer to Figure 2 and Figure 3 The device layer 10 further includes a support layer 14 disposed between the first electrode layer 11 and the second electrode layer 12 and connected to the vibration layer 13. The support layer 14 has at least one cavity 141, and the gas in the cavity 141 is used to vibrate under the driving of the vibration layer 13.

[0072] For example, the support layer 14 is connected to the surface of the vibration layer 13 away from the first electrode layer 11. Alternatively, the support layer 14 can also be connected to the surface of the vibration layer 13 facing the first electrode layer 11, without limitation.

[0073] Alternatively, the number of cavities 141 can be one or multiple, and the multiple cavities 141 are spaced from each other by multiple partitions 142. Alternatively, each light shielding region 30 corresponds to one cavity 141 or multiple cavities 141, without limitation.

[0074] Alternatively, the support layer 14 can be made of a material with high light transmittance, good wear resistance and stable chemical properties, such as a layered structure or a film structure formed by polyethylene terephthalate (PET), amorphous polyethylene terephthalate (APET) and polyethylene terephthalate-1, 4-cyclohexane dimethyl ether (PETG), without limitation.

[0075] Alternatively, the gas in the cavity 141 can be air, nitrogen, oxygen, carbon dioxide and argon, without limitation. When the vibration layer 13 vibrates, the support layer 14 is driven by the vibration layer 13 to vibrate synchronously, and the gas in the cavity 141 of the support layer 14 also vibrates synchronously with the vibration layer 13. The gas in the cavity 141 vibrates and emits ultrasonic waves to the crystal layer 20, so as to enhance the influence of the device layer 10 on the crystal layer 20 and improve the light shielding effect.

[0076] Please refer to Figure 2 and Figure 3 The device layer 10 further comprises a first insulating layer 15 and a second insulating layer 16. The first insulating layer 15 is arranged on the surface of the first electrode layer 11 facing the second electrode layer 12, and the second insulating layer 16 is arranged on the surface of the second electrode layer 12 facing the first electrode layer 11.

[0077] For example, the first insulating layer 15 is arranged between the first electrode layer 11 and the vibration layer 13, the support layer 14 is connected to the surface of the vibration layer 13 away from the first insulating layer 15, and the second insulating layer 16 is arranged between the second electrode layer 12 and the support layer 14.

[0078] Alternatively, the first insulating layer 15 and the second insulating layer 16 can be made of inorganic materials such as aluminum oxide, silicon nitride, silicon oxide and silicon oxynitride, without limitation. Alternatively, the first insulating layer 15 and the second insulating layer 16 are layered structures or film structures formed by the above-mentioned materials.

[0079] Optionally, the light shielding module 100 further comprises a substrate layer 40, and the device layer 10 and the crystal layer 20 are sequentially stacked on the substrate layer 40. Optionally, the substrate layer 40 can be composed of glass, quartz and other materials and other structures (for example, a buffer layer) on the substrate layer 40. For example, the substrate layer 40 is made of glass material with low coefficient of thermal expansion, small density and high chemical stability, so as to ensure that the deformation and warping amount of the substrate layer 40 is smaller during processing and use, and the appearance change caused by material decomposition does not easily occur when subjected to corrosion of various acid and alkali chemical agents or gases.

[0080] Since the vibration layer 13 is a piezoelectric material, when the vibration layer 13 is electrically connected with the first electrode layer 11 or the second electrode layer 12, the vibration frequency of the vibration layer 13 will be affected by the voltage on the first electrode layer 11 or the second electrode layer 12, resulting in failure of light shielding. In addition, when the support layer 14 is made of conductive material, the vibration frequency of the vibration layer 13 will also be affected by the voltage on the first electrode layer 11 or the second electrode layer 12 due to the connection between the support layer 14 and the vibration layer 13. By arranging the first insulating layer 15 and the second insulating layer 16, the first insulating layer 15 is arranged on the surface of the first electrode layer 11 facing the second electrode layer 12, and the second insulating layer 16 is arranged on the surface of the second electrode layer 12 facing the first electrode layer 11, so that the short circuit phenomenon does not occur between the first electrode layer 11, the second electrode layer 12, the vibration layer 13 and the support layer 14.

[0081] In the description of the embodiments of the application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the drawings described, and are only used to facilitate the description of the application and simplify the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.

[0082] The above disclosure is only a preferred embodiment of the application, and of course cannot limit the scope of the application. Those skilled in the art can understand that all or part of the above-mentioned processes can be implemented, and equivalent changes made according to the claims of the application still fall within the scope of the application.

Claims

1. A shading module, characterized by The application discloses a display device, which comprises a display module and a light-emitting module. The light-blocking module comprises a device layer and a crystal layer, the crystal layer is arranged on the surface of the device layer facing the display module, the device layer is used for vibrating to emit ultrasonic waves to the crystal layer, and the crystal layer is used for receiving the ultrasonic waves and switching from a first state to a second state. When the crystal layer is in the first state, the crystal layer is a light-transmitting component to make the light-blocking module transmit the light; when the crystal layer is in the second state, the crystal layer is a light-blocking component to make the light-blocking module block the light.

2. The shading module of claim 1, wherein, The device layer comprises a first electrode layer, a second electrode layer and a vibrating layer, the first electrode layer and the second electrode layer are oppositely arranged, the vibrating layer is arranged between the first electrode layer and the second electrode layer, the crystal layer is arranged on the surface of the first electrode layer away from the second electrode layer, and the first electrode layer and the second electrode layer are used for inputting electric signals to drive the vibrating layer to vibrate.

3. The shading module of claim 2, wherein, The material of the vibrating layer comprises any one or a combination of multiple of barium titanate, lithium niobate, sodium bismuth titanate and quartz.

4. The shading module of claim 2, wherein, The material of the crystal layer comprises any one or a combination of multiple of lithium tantalate crystal, silicon crystal, lithium niobate crystal, barium titanate crystal and potassium-sodium niobate crystal.

5. The shading module of claim 2, wherein, The device layer further comprises a supporting layer, the supporting layer is arranged between the first electrode layer and the second electrode layer and connected with the vibrating layer, the supporting layer has at least one cavity, and the gas in the cavity is used for vibrating under the driving of the vibrating layer.

6. The shading module of claim 5, wherein, The device layer further comprises a first insulating layer and a second insulating layer, the first insulating layer is arranged on the surface of the first electrode layer facing the second electrode layer, and the second insulating layer is arranged on the surface of the second electrode layer facing the first electrode layer.

7. The sunshade module according to any one of claims 1-6, characterized in that, The display module comprises a plurality of display units arranged in an array, the light-blocking module comprises a plurality of light-blocking areas corresponding to the plurality of display units, the crystal layer in the light-blocking area corresponding to the display unit emitting light is in the first state, and the crystal layer in the light-blocking area corresponding to the display unit not emitting light is in the second state.

8. A display device, characterized by comprising: The application further discloses a display device, which comprises a display module, a light-emitting module and the light-blocking module.

9. The display device according to claim 8, wherein The display module comprises a plurality of display units arranged in an array, the light-blocking module comprises a plurality of light-blocking areas corresponding to the plurality of display units, the crystal layer in the light-blocking area corresponding to the display unit emitting light is in the first state, and the crystal layer in the light-blocking area corresponding to the display unit not emitting light is in the second state. The display device further comprises a plurality of non-circuit units corresponding to the plurality of display units one by one, and the plurality of non-circuit units are electrically connected to the device layer in the plurality of light shielding areas and the plurality of display units respectively. When the display unit emits light, the display unit outputs a first signal to the non-circuit unit, and the non-circuit unit outputs a second signal to the device layer in the corresponding light shielding area, so that the crystal layer in the corresponding light shielding area is in the first state; when the display unit does not emit light, the display unit outputs the second signal to the non-circuit unit, and the non-circuit unit outputs the first signal to the device layer in the corresponding light shielding area, so that the crystal layer in the corresponding light shielding area is in the second state, and the first signal and the second signal have the same amplitude and opposite phases.

10. An electronic device, comprising: The display device as claimed in claim 8 or 9.

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