Display panel, display device and display control method

Abstract

The invention discloses a display panel, a display device and a display control method.The display panel comprises a display unit and a liquid crystal unit, the display unit comprises a display substrate and a light source unit, and the display substrate is arranged on the backlight side of the light source unit; the liquid crystal unit is located on the side, away from the display substrate, of the light source unit, the liquid crystal unit comprises a first microcavity, and by controlling the voltage of the first microcavity, the light emitting amount of light emitted by the light source unit penetrating through the first microcavity is adjusted, so that view angle switching display is conducted. According to the display panel, the light emitting amount of the light emitted by the light source unit and penetrating through the first microcavity can be adjusted, and switching display between a wide visual angle and a narrow visual angle of the display panel can be conveniently achieved.

Description

Technical Field

[0001] The present invention generally relates to the field of display technology, and in particular to a display panel, a display device, and a display control method. Background Art

[0002] With the development of electronic display devices, liquid crystal display panels have been increasingly used in various display products due to their advantages of high image quality, small size, light weight, low driving voltage, low power consumption, no radiation, and low manufacturing cost. During the use of LCDs, wide viewing angle mode allows users to see a complete and undistorted image from all directions, while narrow viewing angle mode can protect personal privacy.

[0003] Currently, it is impossible to realize viewing angle controllable display for light emitting diode (LED) products. In order to better meet the needs of users, how to realize viewing angle controllable display for LED display products is an urgent problem to be solved. Summary of the Invention

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a display panel, a display device, and a display control method that can adjust the amount of light emitted by the light source unit passing through the first microcavity, thereby facilitating switching between wide and narrow viewing angles of the display panel.

[0005] In a first aspect, the present invention provides a display panel comprising:

[0006] a display unit, the display unit comprising a display substrate and a light source unit, the display substrate being disposed on a backlight side of the light source unit;

[0007] A liquid crystal unit is located on a side of the light source unit away from the display substrate. The liquid crystal unit includes a first microcavity. By controlling the voltage of the first microcavity, the amount of light emitted by the light source unit passing through the first microcavity is adjusted to perform viewing angle switching display.

[0008] In one embodiment, the liquid crystal unit includes an anode and a cathode, the anode is located on a side of the light source unit away from the display substrate, the cathode is located on a side of the anode away from the light source unit, and the first microcavity is arranged between the anode and the cathode.

[0009] In one embodiment, the liquid crystal unit further includes a first substrate and a second substrate, the first substrate is disposed between the anode and the light source unit, and the second substrate is located on a side of the cathode away from the first microcavity.

[0010] In one embodiment, the liquid crystal unit further includes: a pixel unit, the pixel unit being located between the light source unit and the first microcavity, the pixel unit being configured to process the light emitted by the light source unit to obtain processed light;

[0011] When a voltage is applied to the first microcavity, the processed light passes through the first microcavity for narrow viewing angle display; when no voltage is applied to the first microcavity, the processed light passes through the first microcavity for wide viewing angle display.

[0012] In one embodiment, the pixel unit includes: a first pixel sub-unit, the first pixel sub-unit being configured to convert the light emitted by the light source unit to obtain converted light;

[0013] When a voltage is applied to the first microcavity, the converted light passes through the first microcavity for narrow viewing angle display; when no voltage is applied to the first microcavity, the converted light passes through the first microcavity for wide viewing angle display.

[0014] In one embodiment, the pixel unit further includes: a second pixel sub-unit, the second pixel sub-unit being configured to perform propagation processing on the light emitted by the light source unit to obtain propagated light;

[0015] When a voltage is applied to the first microcavity, the propagated light passes through the first microcavity for narrow viewing angle display; when no voltage is applied to the first microcavity, the propagated light passes through the first microcavity for wide viewing angle display.

[0016] In one embodiment, the first pixel subunit includes a red pixel subunit and a green pixel subunit, the voltage applied by the first microcavity corresponding to the red pixel subunit is greater than the voltage applied by the first microcavity corresponding to the green pixel subunit, and the voltage applied by the first microcavity corresponding to the green pixel subunit is greater than the voltage applied by the first microcavity corresponding to the second pixel subunit.

[0017] In one embodiment, the liquid crystal unit further includes a second microcavity, and the second microcavity is disposed between the pixel unit and the light source unit.

[0018] In one embodiment, when a voltage is applied to the second microcavity, the light emitted by the light source unit passes through the second microcavity for narrow viewing angle display; when no voltage is applied to the second microcavity, the light emitted by the light source unit passes through the second microcavity for wide viewing angle display.

[0019] In a second aspect, the present invention provides a display device, which includes the display panel provided by the above embodiment.

[0020] In a third aspect, the present invention provides a display control method, which is applied to the display panel provided in the above embodiment, and includes:

[0021] By controlling the voltage of the first microcavity, the light output amount of the light emitted by the light source unit passing through the first microcavity is adjusted to perform viewing angle switching display.

[0022] The display panel provided in the embodiments of the present application includes a display unit and a liquid crystal unit. The display unit includes a display substrate and a light source unit. The display substrate is disposed on the backlight side of the light source unit, and the liquid crystal unit is located on the side of the light source unit away from the display substrate. The liquid crystal unit includes a first microcavity. By controlling the voltage of the first microcavity, the amount of light emitted by the light source unit that passes through the first microcavity is adjusted to achieve viewing angle switching display. In the display panel provided in the present application, since the first microcavity is provided in the liquid crystal unit, the voltage of the first microcavity can be controlled to make the liquid crystal molecules in the first microcavity exhibit different refractive indices, thereby adjusting the amount of light emitted by the light source unit that passes through the first microcavity, thereby facilitating the switching display of the display panel between wide and narrow viewing angles. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0024] Figure 1 A schematic structural diagram of a display panel provided by an embodiment of the present invention;

[0025] Figure 2 A schematic diagram of the structure inside a liquid crystal unit when no voltage is applied, provided by an embodiment of the present invention;

[0026] Figure 3 A schematic diagram of the structure inside a liquid crystal unit when a voltage is applied according to an embodiment of the present invention;

[0027] Figure 4 Schematic diagram of optical characteristic curves of the first Fabry-Perot cavity at different angles provided by an embodiment of the present invention;

[0028] Figure 5 A schematic structural diagram of light in a display panel when a voltage is applied to the first microcavity provided by an embodiment of the present invention;

[0029] Figure 6 A schematic structural diagram of light in a display panel when no voltage is applied to the first microcavity provided by an embodiment of the present invention;

[0030] Figure 7 A schematic diagram of an optical characteristic curve corresponding to a B pixel in a Fabry-Perot cavity provided by an embodiment of the present invention;

[0031] Figure 8 A schematic structural diagram of a display panel provided in another embodiment of the present invention;

[0032] Figure 9 This is a structural schematic diagram of light in a display panel when a voltage is applied to the first microcavity according to an embodiment of the present invention;

[0033] Figure 10 A schematic structural diagram of light in a display panel when no voltage is applied to the first microcavity provided by an embodiment of the present invention;

[0034] Figure 11 A schematic diagram of an optical characteristic curve corresponding to an R pixel in a Fabry-Perot cavity provided by an embodiment of the present invention;

[0035] Figure 12 A schematic diagram of an optical characteristic curve corresponding to a G pixel in a Fabry-Perot cavity provided by an embodiment of the present invention;

[0036] Figure 13 A schematic structural diagram of a display panel provided in yet another embodiment of the present invention;

[0037] Figure 14 A schematic diagram of the connection structure between the first microcavity, the anode, the cathode, the first substrate and the second substrate provided in an embodiment of the present invention;

[0038] Figure 15 A schematic diagram of optical characteristic curves at different angles in the second microcavity provided by an embodiment of the present invention;

[0039] Figure 16 A schematic diagram of an optical characteristic curve corresponding to a G pixel in a first microcavity provided by an embodiment of the present invention;

[0040] Figure 17 A schematic diagram of an optical characteristic curve corresponding to an R pixel in a first microcavity provided by an embodiment of the present invention;

[0041] Figure 18 A schematic structural diagram of light in a display panel when voltage is applied to the first microcavity and the second microcavity provided in an embodiment of the present invention;

[0042] Figure 19 A flow chart of a method for performing viewing angle switching display by controlling the voltage of a first microcavity to adjust the amount of light emitted by a light source unit passing through the first microcavity, provided in an embodiment of the present invention;

[0043] Figure 20 A flow chart of a method for performing viewing angle switching display by controlling the voltage of a first microcavity to adjust the amount of light emitted by a light source unit passing through the first microcavity, provided in an embodiment of the present invention;

[0044] Figure 21 A schematic structural diagram of a display device provided by an embodiment of the present invention.

[0045] Description of reference numerals:

[0046] Display unit 10, display substrate 11, light source unit 12, liquid crystal unit 20, first microcavity 21, anode 22, cathode 23, first substrate 24, second substrate 25, pixel unit 26, second microcavity 27, display panel 100, display device 200, microprocessor 201, memory 202, peripheral device interface 203, radio frequency circuit 204, sensor 205, power supply 206, first pixel subunit 260, red pixel subunit 261, green pixel subunit 262, second pixel subunit 263. DETAILED DESCRIPTION

[0047] The present application will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the relevant invention and are not intended to limit the invention. It should also be noted that, for ease of description, only portions relevant to the invention are shown in the accompanying drawings.

[0048] In order to help those skilled in the art better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0049] The terms "first," "second," "third," "fourth," and so on (if any) in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described can be implemented in orders other than those illustrated or described herein.

[0050] In addition, the terms "comprise" and "have" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus that includes a series of steps or modules is not necessarily limited to those steps or modules explicitly listed, but may include other steps or modules not explicitly listed or inherent to such process, method, product or apparatus.

[0051] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0052] Currently, it is impossible to achieve a display with controllable viewing angle for light emitting diode (LED) products.

[0053] Based on the above-mentioned defects, the present application provides a display panel, a display module and a display control method. In the display panel provided by the present application, since a first microcavity is provided in the liquid crystal unit, the liquid crystal molecules can exhibit different refractive indices by controlling the voltage of the first microcavity, thereby adjusting the amount of light emitted by the light source unit passing through the first microcavity, thereby facilitating the switching display between wide viewing angle and narrow viewing angle of the display panel.

[0054] Based on the above problems, the technical solution provided in the embodiment of the present disclosure provides a display panel, such as Figure 1 As shown, it includes: a display unit 10 and a liquid crystal unit 20. The display unit 10 includes a display substrate 11 and a light source unit 12. The display substrate 11 is arranged on the backlight side of the light source unit 12. The liquid crystal unit 20 is located on the side of the light source unit 12 away from the display substrate 11. The liquid crystal unit 20 includes a first microcavity 21. By controlling the voltage of the first microcavity 21, the amount of light emitted by the light source unit 12 passing through the first microcavity 21 is adjusted to perform viewing angle switching display.

[0055] It is understood that the display panel can be a blue phase liquid crystal display (BPLD). BPLDs utilize blue phase liquid crystal materials, which offer higher contrast, wider viewing angles, and faster response times. They operate by controlling the alignment of liquid crystal molecules to create different resonant states when light passes through the liquid crystal layer, thereby displaying images. These displays offer advantages such as low power consumption, high brightness, high contrast, and a wide viewing angle. They can be applied to smartphones, tablets, laptops, televisions, and in-car displays.

[0056] The type of the above-mentioned display panel can be an OLED display panel, an active-matrix organic light-emitting diode (AMOLED) display panel, a passive matrix organic light-emitting diode (Passive Matrix OLED) display panel, a quantum dot organic light-emitting diode (QLED) display panel, etc. This embodiment does not limit the type of display panel. Among them, the above-mentioned light source unit 12 can be an LED unit, for example, it can include a micro LED unit or a QD-Micro LED unit. The light source unit 12 is used to generate light and send the light to the first microcavity 21 when a voltage is applied, and by controlling the voltage of the first microcavity 21, adjust the light output of the light passing through the first microcavity 21 to achieve switching display of different viewing angles of the display panel.

[0057] The first microcavity 21 is a Fabry–Perot cavity (FP cavity), also known as a Fabry–Perot cavity, or a plane-parallel cavity, which is a type of optical resonant cavity and can be composed of two parallel plane mirrors.

[0058] Optional, please continue to see Figure 1 As shown, the liquid crystal unit 20 may include an anode 22 and a cathode 23 , wherein the anode 22 is located on a side of the light source unit 12 away from the display substrate 11 , and the cathode 23 is located on a side of the anode 22 away from the light source unit 12 , and the first microcavity 21 is disposed between the anode 22 and the cathode 23 .

[0059] The liquid crystal unit 20 further includes a first substrate 24 and a second substrate 25 . The first substrate 24 is disposed between the anode 22 and the light source unit 12 , and the second substrate 25 is located on a side of the cathode 23 away from the first microcavity 21 .

[0060] It should be noted that the first substrate 24 and the second substrate 25 can both be glass substrates. The anode 22 and cathode 23 can be made of metal. They can be made by sputtering indium tin oxide (ITO) on the first substrate 24 as the anode 22 and then sequentially coating p-type and n-type organic materials as the cathode by vacuum thermal evaporation.

[0061] It's important to note that the principle of LCDs is based on the properties of liquid crystal molecules. These molecules can have two states: isotropic and anisotropic. Under normal circumstances, when no voltage is applied, the liquid crystal molecules are isotropic and cannot transmit or block light. However, under the influence of an external electric field or voltage, the liquid crystal molecules change their alignment, exhibiting anisotropic states.

[0062] It is understood that the structure of the liquid crystal cell 20 generally consists of a first microcavity sandwiched between two layers, a first substrate 24 and a second substrate 25, containing liquid crystal molecules. The first substrate 24 and the second substrate 25 can each be coated with a transparent conductive layer. When current passes through the side coated with the transparent conductive layer, an electric field is generated in the first microcavity 21 of the liquid crystal cell 20. This electric field changes the arrangement of the liquid crystal molecules, causing them to become anisotropic. The arrangement of the liquid crystal molecules determines the light transmittance of each pixel on the screen. By utilizing the optical properties of the liquid crystal molecules and controlling their arrangement and orientation, image display is achieved.

[0063] See Figure 2 As shown, taking the display panel as a blue phase liquid crystal display as an example, the first microcavity may include blue phase liquid crystal molecules, and the blue phase liquid crystal display includes an anode 22, a cathode 23, a first substrate 24, and a second substrate 25. When the first substrate 24 is a lower substrate and the second substrate 25 is an upper substrate, no voltage is applied to the blue phase liquid crystal molecules, and the blue phase liquid crystal molecules are isotropic, that is, the refractive index is the same in all directions; see Figure 3 As shown, when a vertical electric field is applied to the blue phase liquid crystal molecules, the blue phase liquid crystal molecules are stretched along the direction of the electric field. At this time, the refractive index along the direction of the electric field becomes larger, and the blue phase liquid crystal molecules are anisotropic.

[0064] Furthermore, by applying different voltages to the blue-phase liquid crystal molecules, the blue-phase liquid crystal molecules will form a specific Fabry-Perot cavity (FP resonant cavity). Different Fabry-Perot cavity property parameters will have a corresponding impact on the transmittance of the Fabry-Perot cavity. These property parameters can include, for example, the thickness of the Fabry-Perot cavity and the angle at which light enters the Fabry-Perot cavity. The transmittance of the Fabry-Perot cavity can be expressed by the following formula:

[0065]

[0066] in, T is the transmittance of the Fabry-Perot cavity, R is the reflectivity of the Fabry-Perot cavity, λ is the wavelength, θ1 is the angle at which the light enters the Fabry-Perot cavity, n is the refractive index of the Fabry-Perot cavity, and d is the thickness of the Fabry-Perot cavity.

[0067] It is understandable that the first microcavity (first Fabry-Perot cavity) exhibits different optical properties for light at different angles, as can be seen in Figure 4 As shown, Figure 4 The figure is a schematic diagram of the optical characteristics of the Fabry-Perot cavity for light at different angles. When the angles are 0 degrees, 15 degrees, and 30 degrees, the optical characteristics are different. Figure 4As can be seen in the figure, for light with an angle of 0 degrees, a wavelength of 460nm can pass through the Fabry-Perot cavity; for light with an angle of 15 degrees, a wavelength of 430nm can pass through the Fabry-Perot cavity; and for light with an angle of 30 degrees, a wavelength of 390nm can pass through the Fabry-Perot cavity. As the angle of the light increases, the spectrum of light will blueshift. Light at large angles cannot pass through the first Fabry-Perot cavity, while only light at small angles can pass through the first Fabry-Perot cavity. Therefore, based on the above principle, the angle of the display unit 10 can be controlled, thereby achieving viewing angle switching. Among them, the small angle can be, for example, an angle less than 15° from the vertical direction, and the large angle is an angle greater than 15° from the vertical direction.

[0068] Specifically, see Figure 5 As shown, when a voltage is applied to the first microcavity 21, the liquid crystal molecules will change their arrangement and exhibit anisotropic states. When a voltage is applied to the light source unit 12, the light source unit 12 emits light, which is emitted into the first microcavity 21 of the liquid crystal unit 20. Because the first microcavity 21 is selective for light at different angles, light at large angles cannot pass through the first microcavity 21, and only light at small angles can pass through the first microcavity 21. Therefore, when a voltage is applied to the first microcavity 21, light at small angles passes through the first microcavity 21, thereby achieving a narrow viewing angle display. Figure 6 As shown, when no voltage is applied to the first microcavity 21 , the light source unit 12 emits light to generate light, which is emitted to the first microcavity 21 of the liquid crystal unit 20 and passes through the first microcavity 21 , thereby achieving wide viewing angle display.

[0069] Exemplarily, taking the display panel as a mini LED monochrome direct display screen, the liquid crystal molecules included in the liquid crystal unit 20 thereof are blue phase liquid crystal molecules, the light source unit 12 is a mini LED, and the first microcavity 21 is a Fabry-Perot cavity (FP cavity) as an example, when a voltage is applied to the light source unit 12, the light source unit 12 generates blue light and emits it to the first microcavity 21. The blue light includes light in various angular directions. At this time, when no voltage is applied to the first microcavity 21, the blue light all passes through the first microcavity 21, thereby achieving a wide viewing angle display. When a voltage is applied to the first microcavity 21, the blue light of various angles generated by the light source unit 12 is emitted to the first microcavity 21. Only the blue light of some angles can pass through the first microcavity 21, that is, only the blue light in the small angle direction can pass through, and the blue light in the large angle direction cannot pass through the first microcavity 21, thereby achieving a narrow viewing angle display. Among them, the schematic diagram of the optical characteristic curve corresponding to the Fabry-Perot cavity can be found in Figure 7 As shown in FIG, specifically, it is a schematic diagram of an optical characteristic curve corresponding to a B pixel. It can be seen from the figure that the blue light of the B pixel can pass through the Fabry-Perot cavity when the wavelength is 460 nm.

[0070] The display panel provided in the embodiment of the present application includes a display unit 10 and a liquid crystal unit 20. The display unit 10 includes a display substrate 11 and a light source unit 12. The display substrate 11 is arranged on the backlight side of the light source unit 12. The liquid crystal unit 20 is located on the side of the light source unit 12 away from the display substrate 11. The liquid crystal unit 20 includes a first microcavity 21. By controlling the voltage of the first microcavity 21, the amount of light emitted by the light source unit 12 passing through the first microcavity 21 is adjusted to achieve viewing angle switching display. In the display panel provided in the present application, since the first microcavity 21 is provided in the liquid crystal unit 20, the liquid crystal molecules can exhibit different refractive indices by controlling the voltage of the first microcavity 21, thereby adjusting the amount of light emitted by the light source unit 12 passing through the first microcavity 21, thereby facilitating the switching display between wide viewing angle and narrow viewing angle of the display panel.

[0071] In one embodiment, see Figure 8 As shown, the liquid crystal unit 20 further includes a pixel unit 26, which is located between the light source unit 12 and the first microcavity 21. The pixel unit 26 is used to process the light emitted by the light source unit 12 to obtain processed light. When a voltage is applied to the first microcavity 21, the processed light passes through the first microcavity 21 for narrow viewing angle display; when no voltage is applied to the first microcavity 21, the processed light passes through the first microcavity 21 for wide viewing angle display.

[0072] Specifically, the above-mentioned pixel unit 26 can be a quantum dot (QD) unit, which is a nano-scale semiconductor. By applying a certain electric field or light pressure to this nano-semiconductor material, it will emit light of a specific frequency, and the frequency of the emitted light will change with the change of the size of the semiconductor. Therefore, by adjusting the size of the nano-semiconductor, the color of the light it emits can be controlled.

[0073] When a voltage is applied to the light source unit 12, the light source unit 12 emits light and transmits it to the pixel unit 26. The pixel unit 26 processes the light emitted by the light source unit 12, obtains processed light, and transmits it to the first microcavity 21. The processed light is light at various angles. When a voltage is applied to the first microcavity 21, only light at a certain angle can pass through the first microcavity 21, that is, only light at a small angle can pass through, and light at a large angle cannot pass through the first microcavity 21, thereby achieving a narrow viewing angle display. When no voltage is applied to the first microcavity 21, the processed light passes through the first microcavity 21 completely, thereby achieving a wide viewing angle display.

[0074] Specifically, the pixel unit 26 is located between the light source unit 12 and the first substrate 24 and is bonded to the first substrate 24. The first substrate 24 is provided with an anode 22 at an end away from the light source unit 12, and a first microcavity 21 is provided between the anode 22 and the cathode 23. The first microcavity 21 is provided with a cathode 23 at an end away from the anode 22, and the cathode 23 is provided with a second substrate 25 at a section away from the first microcavity 21. When applying a voltage to the first microcavity 21, it can be achieved by applying a voltage to the anode 22 and the cathode 23.

[0075] Optionally, the first substrate 24, anode 22, first microcavity 21, cathode 23, and second substrate 25 may be sequentially bonded and connected via an adhesive layer. The adhesive layer may be either an electrically conductive adhesive (ECA) or a nonconductive adhesive (NCA). The electrically conductive adhesive is used for electrical conduction, while the nonconductive adhesive is not used for electrical conduction.

[0076] As an implementable manner, the above-mentioned pixel unit 26 includes: a first pixel sub-unit 260, which is used to convert the light emitted by the light source unit 12 to obtain converted light; when a voltage is applied to the first microcavity 21, the converted light passes through the first microcavity 21 for narrow viewing angle display; when no voltage is applied to the first microcavity 21, the converted light passes through the first microcavity 21 for wide viewing angle display.

[0077] It should be noted that, when the liquid crystal display is a blue phase liquid crystal display, the first pixel subunit 260 may include a red pixel subunit 261 and a green pixel subunit 262. The red pixel subunit 261 is used to excite and convert the blue light emitted by the light source unit 12 to obtain red light; the green pixel subunit 262 is used to excite and convert the blue light emitted by the light source unit 12 to obtain green light.

[0078] Specifically, see Figure 9 As shown, taking the first pixel subunit 260 as a red pixel subunit 261 as an example, when a voltage is applied to the light source unit 12, the light source unit 12 emits blue light and transmits it to the red pixel subunit 261. The red pixel subunit 261 excites the blue light emitted by the light source unit 12 to generate red light and transmits it to the first microcavity 21. This red light is light at various angles. When a voltage is applied to the first microcavity 21, only light at certain angles can pass through the first microcavity 21, that is, only light at small angles can pass through, and light at large angles cannot pass through the first microcavity 21, thereby achieving a narrow viewing angle display. Figure 10 As shown, when no voltage is applied to the first microcavity 21 , the red light can all pass through the first microcavity 21 , thereby achieving a wide viewing angle display.

[0079] Similarly, when the first pixel subunit 260 is a green pixel subunit 262, for example, when a voltage is applied to the light source unit 12, the light source unit 12 emits blue light and transmits it to the green pixel subunit 262. The green pixel subunit 262 processes the blue light emitted by the light source unit 12 to obtain green light and transmits it to the first microcavity 21. This green light is light at various angles. When a voltage is applied to the first microcavity 21, only light at certain angles of the green light can pass through the first microcavity 21, that is, only light at small angles can pass through, and light at large angles cannot pass through the first microcavity 21, thereby achieving a narrow viewing angle display. When no voltage is applied to the first microcavity 21, the green light at various angles can all pass through the first microcavity 21, thereby achieving a wide viewing angle display.

[0080] As another possible implementation, the pixel unit 26 further includes: a second pixel sub-unit 263, which is used to propagate the light emitted by the light source unit 12 to obtain propagated light; when a voltage is applied to the first microcavity 21, the propagated light passes through the first microcavity 21 for narrow viewing angle display; when no voltage is applied to the first microcavity 21, the propagated light passes through the first microcavity 21 for wide viewing angle display.

[0081] It should be noted that, when the liquid crystal display is a blue phase liquid crystal display, the second pixel sub-unit may include a blue pixel unit, which is used to perform propagation processing on the blue light emitted by the light source unit 12 to obtain propagated blue light.

[0082] Specifically, taking the second pixel sub-unit as a blue pixel unit as an example, when a voltage is applied to the light source unit 12, the light source unit 12 emits blue light and transmits it to the blue pixel unit. The blue pixel unit transmits and processes the blue light emitted by the light source unit 12 and transmits it to the first microcavity 21. This blue light is light at various angles. When a voltage is applied to the first microcavity 21, only light at a certain angle can pass through the first microcavity 21, that is, only light at a small angle can pass through, and light at a large angle cannot pass through the first microcavity 21, thereby achieving a narrow viewing angle display. When no voltage is applied to the first microcavity 21, the blue light can all pass through the first microcavity 21, thereby achieving a wide viewing angle display.

[0083] The optical characteristic curves of the red (R) pixel unit and the green (G) pixel unit can be found in Figure 11-12 As shown, the optical characteristic curve of the blue (B) pixel unit can be seen in Figure 7As shown in the figure, it can be seen that for the R pixel unit, it can penetrate the Fabry-Perot cavity (first microcavity) at 0.58-0.68um, and its optical intensity is strongest when the wavelength is 0.63um; for the G pixel unit, it can penetrate the Fabry-Perot cavity (first microcavity) at 0.48-0.58um, and its optical intensity is strongest when the wavelength is 0.55um; for the B pixel unit, it can penetrate the Fabry-Perot cavity (first microcavity) at 450-460num, and its optical intensity is strongest when the wavelength is 430nm.

[0084] Optionally, the voltage applied to the first microcavity 21 corresponding to the red pixel subunit 261 is greater than the voltage applied to the first microcavity 21 corresponding to the green pixel subunit 262, and the voltage applied to the first microcavity 21 corresponding to the green pixel subunit 262 is greater than the voltage applied to the first microcavity 21 corresponding to the second pixel subunit.

[0085] It should be noted that, since the liquid crystal molecules Δn corresponding to different pixel units are different, among which the liquid crystal molecules Δn corresponding to the B pixel unit are the smallest, the liquid crystal molecules Δn corresponding to the G pixel unit are the second largest, and the liquid crystal molecules Δn corresponding to the R pixel unit are the largest. Therefore, the voltage required to be applied to the first microcavity 21 corresponding to the R pixel unit is the largest, the voltage required to be applied to the first microcavity 21 corresponding to the G pixel unit is the second largest, and the voltage required to be applied to the first microcavity 21 corresponding to the B pixel unit is the smallest.

[0086] It can be understood that in the process of applying a voltage to the first microcavity 21, it can be achieved by generating an electric field through the anode 22 and the cathode 23. For example, for the G pixel unit, the voltage applied to the first microcavity 21 is 15V, then the voltage applied through the cathode 23 is 0V, and the voltage applied to the anode 22 is 15V; for the R pixel unit, the voltage applied to the first microcavity 21 is 25V, then the voltage applied through the cathode 23 is 0V, and the voltage applied to the anode 22 is 25V; for the B pixel unit, the voltage applied to the first microcavity 21 is 10V, then the voltage applied through the cathode 23 is 0V, and the voltage applied to the anode 22 is 10V.

[0087] In this embodiment, when the liquid crystal display is a blue phase liquid crystal display, the electrodes control different voltages on the blue phase liquid crystal, so that the blue phase liquid crystal molecules in the liquid crystal unit 20 exhibit different refractive indices, further enabling the blue phase liquid crystal in the Fabry-Perot cavity to selectively transmit light of different wavelengths. Due to the selectivity for light at different viewing angles, a narrow viewing angle display is achieved when only light at a small angle passes through the Fabry-Perot cavity, and a wide viewing angle display is achieved when light at all angles passes through the Fabry-Perot cavity, thereby achieving the technical effect of controllable viewing angle, solving the technical problem that existing micro LED or QD-Micro LED products have difficulty in achieving controllable viewing angle.

[0088] In one embodiment, see Figure 13 As shown, the liquid crystal unit 20 further includes a second microcavity 27 , which is disposed between the pixel unit 26 and the light source unit 12 .

[0089] When voltage is applied to the second microcavity 27 , light emitted by the light source unit 12 passes through the second microcavity 27 for narrow viewing angle display; when no voltage is applied to the second microcavity 27 , light emitted by the light source unit 12 passes through the second microcavity 27 for narrow viewing angle display.

[0090] Specifically, the second microcavity 27 may have the same or different thickness as the first microcavity 21, and the second microcavity has the same structure as the first microcavity. Figure 14 As shown, when the liquid crystal cell 20 includes: a first microcavity 21, an anode 22, a cathode 23, a first substrate 24, and a second substrate 25, wherein the first substrate 24 can be a first lower substrate and the second substrate 25 can be a first upper substrate, then the first lower substrate, the anode 22, the first microcavity 21, the cathode 23, and the first upper substrate are connected in sequence. When the liquid crystal cell 20 further includes a second microcavity 27, an anode, a cathode, a third substrate, and a fourth substrate, wherein the third substrate is the second lower substrate and the fourth substrate can be the second upper substrate, then the second lower substrate, the anode, the second microcavity 27, the cathode, and the second upper substrate are connected in sequence.

[0091] The optical characteristic curve of the second microcavity 27 can be found in Figure 15 As shown in the figure, the relationship between wavelength and intensity when the light angle is 0 degrees is shown. The second microcavity 27 can only pass blue light at a small angle. The optical characteristic curve of the first microcavity 21 can be seen in FIG. Figure 16 As shown in FIG, the optical characteristic curve corresponding to the G pixel is shown in FIG, the optical characteristic curve between the wavelength and the optical intensity corresponding to the G pixel is shown in FIG. The first microcavity 21 can only pass the green light at a small angle. The optical characteristic curve of the first microcavity 21 can be seen in FIG. Figure 17 As shown in FIG, the optical characteristic curve corresponding to the R pixel is shown in FIG, and the optical characteristic curve between the wavelength and the optical intensity corresponding to the R pixel is shown in FIG.

[0092] It should be noted that the display substrate 11 is disposed on the backlight side of the light source unit 12, the first microcavity 21 is located on the side of the light source unit 12 away from the display substrate 11, the pixel unit 26 is located between the light source unit 12 and the first microcavity 21, and the second microcavity 27 is disposed between the pixel unit 26 and the light source unit 12. The pixel unit 26 includes a red pixel subunit 261, a green pixel subunit 262, and a blue pixel unit.

[0093] As a possible implementation, see Figure 18 As shown, taking the red pixel subunit 261 as an R-QD unit as an example, when a voltage is applied to the second microcavity 27 and a voltage is applied to the light source unit 12 corresponding to the R-QD unit, the light source unit 12 generates blue light and emits the blue light to the second microcavity 27. The second microcavity 27 only allows blue light at a small angle to pass through, and blue light at a large angle cannot pass through the second microcavity 27. Since the second microcavity 27 only allows blue light at a small angle to pass through, it can achieve an anti-crosstalk function to prevent large-angle light from causing crosstalk to adjacent pixels. At this time, when the blue light at a small angle reaches the R-QD unit, the R-QD unit converts the blue light, excites the blue light into red light, and emits it to the first microcavity 21 corresponding to the R-QD unit above the R-QD unit. Since the light emitted by the R-QD unit is at all angles, the emitted light is Lambertian and is red light at a large angle. When a voltage is applied to the first microcavity 21, the first microcavity 21 only allows red light at a small angle to pass through, and red light at a large angle cannot pass through the first microcavity 21, thereby achieving a narrow viewing angle display. When no voltage is applied to the first microcavity 21, the light emitted by the R-QD unit is red light at all angles, and can be emitted at a large angle to achieve a wide viewing angle display.

[0094] Similarly, taking the green pixel sub-unit 262 as a G-QD unit as an example, when a voltage is applied to the second microcavity 27 and a voltage is applied to the light source unit 12 corresponding to the G-QD unit, the light source unit 12 generates blue light and emits the blue light to the second microcavity 27. The second microcavity 27 only allows blue light at a small angle to pass through, and blue light at a large angle cannot pass through the second microcavity 27. Since the second microcavity 27 only allows blue light at a small angle to pass through, it can achieve an anti-crosstalk function and prevent large-angle light from causing crosstalk to adjacent pixels. At this time, when the blue light at a small angle reaches the G-QD unit, the G-QD unit converts the blue light, excites the blue light into green light, and emits it to the first microcavity 21 corresponding to the G-QD unit above the G-QD unit. Since the light emitted by the G-QD unit is at all angles, the emitted light is Lambertian and is green light at a large angle. When a voltage is applied to the first microcavity 21, the first microcavity 21 only allows green light at a small angle to pass through, and green light at a large angle cannot pass through the first microcavity 21, thereby achieving a narrow viewing angle display. When no voltage is applied to the first microcavity 21, the light emitted by the G-QD unit is green light at all angles, and can be emitted at a large angle, achieving a wide viewing angle display.

[0095] It is understood that when wide-viewing angle display is used, there is no need to apply voltage to the first microcavity 21 and the second microcavity 27. The light emitted by the QD unit can be emitted at a large angle, achieving wide-viewing angle display. Optionally, a voltage can be applied to the second microcavity 27 without applying voltage to the first microcavity 21 to prevent crosstalk between adjacent pixels, thereby achieving wide-viewing angle display. Therefore, by controlling the voltages applied to the first microcavity 21 and the second microcavity 27, switching between different viewing angles of the display panel can be achieved.

[0096] In this embodiment, for R and G pixels, since the second microcavity 27 only allows light at a small angle to pass through when a voltage is applied, an anti-crosstalk function can be achieved, preventing large-angle light from causing crosstalk to adjacent pixels. Moreover, when a voltage is applied to the first microcavity 21, only small-angle red or green light is allowed to pass through. Thus, a narrow viewing angle display can be achieved through the first microcavity 21, thereby realizing an anti-peeping display and improving user privacy.

[0097] As another feasible method, taking the blue phase liquid crystal display as an example, its B pixel unit does not need to be filled with QD. When a voltage is applied to the second microcavity 27 and a voltage is applied to the light source unit 12 corresponding to the B pixel unit, the light source unit 12 generates blue light and emits the blue light to the second microcavity 27. The second microcavity 27 only allows small-angle blue light to pass through, and large-angle blue light cannot pass through the second microcavity 27. Since QD does not need to be filled above the B pixel, the small-angle blue light remains small-angle light after passing through the transparent layer material and is emitted to the first microcavity 21. When no voltage is applied to the first microcavity 21, the small-angle blue light finally remains small-angle blue light after passing through the first microcavity 21, thereby achieving a narrow viewing angle display. When no voltage is applied to the second microcavity 27 and a voltage is applied to the light source unit 12 corresponding to the B pixel unit 26, the light source unit 12 generates blue light and emits the light to the second microcavity 27. The second microcavity 27 allows blue light of all angles to pass through. After passing through the transparent layer material, it remains blue light with a large angle and is emitted to the first microcavity 21. When no voltage is applied to the first microcavity 21, the blue light with a large angle ultimately remains blue light with a large angle after passing through the first microcavity 21, thereby achieving a wide-viewing angle display.

[0098] In this embodiment, for the B pixel, since the second microcavity 27 only allows light at a small angle to pass through when a voltage is applied, it can emit light at a small angle when no voltage is applied to the first microcavity 21, so that the display panel presents a narrow viewing angle display, thereby achieving an anti-peeping display and improving user privacy. Moreover, when no voltage is applied to both the first microcavity 21 and the second microcavity 27, light at all angles is allowed to pass through, thereby achieving a wide viewing angle display, allowing the user to see the corresponding display image from all directions.

[0099] On the other hand, an embodiment of the present application provides a display control method for a display panel, the method comprising: adjusting the amount of light emitted by a light source unit passing through the first microcavity by controlling the voltage of the first microcavity to perform viewing angle switching display.

[0100] It should be noted that when the display panel is a blue phase liquid crystal display screen, the above-mentioned first microcavity includes blue phase liquid crystal molecules. When no voltage is applied to the blue phase liquid crystal molecules, the blue phase liquid crystal molecules are isotropic, that is, the refractive index in all directions is the same; when voltage is applied to the blue phase liquid crystal molecules, it generates a vertical electric field on the blue phase liquid crystal molecules, and the blue phase liquid crystal molecules are stretched along the direction of the electric field, that is, the refractive index of the blue phase liquid crystal molecules along the direction of the electric field becomes larger, and the blue phase liquid crystal molecules are anisotropic.

[0101] Specifically, in the process of adjusting the voltage of the first microcavity, it can be achieved by applying voltage or not applying voltage to the first microcavity, so that the refractive index of the first microcavity for light at different angles is different, thereby adjusting the amount of light emitted by the light source unit passing through the first microcavity to achieve viewing angle switching display.

[0102] In one embodiment, the method of controlling the voltage of the first microcavity to adjust the amount of light emitted by the light source unit passing through the first microcavity to perform viewing angle switching display may include:

[0103] When a voltage is applied to the first microcavity, the amount of light emitted by the light source passing through the first microcavity is reduced, so that a narrow viewing angle display is performed through the first microcavity; when no voltage is applied to the first microcavity, the amount of light emitted by the light source unit passing through the first microcavity remains unchanged, so that a wide viewing angle display is performed through the first microcavity.

[0104] For example, taking a display panel that is a mini LED monochrome vertical display panel and includes blue-phase liquid crystal molecules as an example, when a voltage is applied to the light source unit, the light source unit emits blue light, which is emitted into the first microcavity of the liquid crystal unit. Because the first microcavity is selective for light at different angles, blue light at large angles cannot pass through the first microcavity, and only blue light at small angles can pass through the first microcavity. Therefore, when a voltage is applied to the first microcavity, the amount of blue light emitted through the first microcavity is reduced, and blue light at small angles passes through the first microcavity, thereby achieving a narrow viewing angle display. When no voltage is applied to the first microcavity, the light source unit emits blue light, which is emitted into the first microcavity of the liquid crystal unit and passes through the first microcavity entirely. The amount of blue light emitted through the first microcavity remains unchanged, thereby achieving a wide viewing angle display.

[0105] In one embodiment, the liquid crystal unit further comprises a pixel unit, which is located between the light source unit and the first microcavity. Figure 19As shown, the above-mentioned method of controlling the voltage of the first microcavity to adjust the light output amount of the light emitted by the light source unit passing through the first microcavity to perform viewing angle switching display includes:

[0106] S101 , processing the light emitted by the light source unit through the pixel unit to obtain processed light.

[0107] S102 , when a voltage is applied to the first microcavity, the amount of light emitted from the processed light passing through the first microcavity is reduced, so as to perform narrow viewing angle display through the first microcavity.

[0108] S103 , when no voltage is applied to the first microcavity, the amount of light emitted by the processed light passing through the first microcavity remains unchanged, so as to perform wide viewing angle display through the first microcavity.

[0109] It should be noted that the above-mentioned pixel unit may include a first pixel sub-unit and a second pixel sub-unit. Taking the display panel as a blue phase liquid crystal display as an example, the first pixel sub-unit includes an R pixel unit and a G pixel unit, and the second pixel sub-unit is a B pixel unit.

[0110] For example, taking the display panel as a mini LED display panel, in which the liquid crystal molecules included therein are blue phase liquid crystal molecules, when a voltage is applied to the light source unit, the light source unit emits blue light and emits it to the R pixel unit. The R pixel unit excites the blue light emitted by the light source unit to obtain red light and emits it to the first microcavity. The red light is light in various angular directions, including light in large angle directions and light in small angle directions. When a voltage is applied to the first microcavity, the amount of red light emitted through the first microcavity is reduced, that is, only light at a certain angle can pass through the first microcavity, that is, only light in a small angle direction can be emitted through the first microcavity, and light in a large angle direction cannot be emitted through the first microcavity. Due to the selectivity for light in different angular directions, a narrow viewing angle display is achieved. When no voltage is applied to the first microcavity, the amount of red light emitted through the first microcavity remains unchanged, and the red light can all be emitted through the first microcavity, thereby achieving a wide viewing angle display. Similarly, the viewing angle switching display process of the G pixel unit is similar to that of the R pixel unit, and the viewing angle switching display can be achieved by applying a voltage or not applying a voltage to the first microcavity.

[0111] Furthermore, when a voltage is applied to the light source unit, the light source unit emits blue light and transmits it to the blue pixel unit corresponding to the transparent layer. The blue pixel unit transmits and processes the blue light emitted by the light source unit and transmits it to the first microcavity. The blue light is light in various angular directions. When a voltage is applied to the first microcavity, the amount of blue light passing through the first microcavity decreases, that is, only light at a certain angle can pass through the first microcavity, that is, only light at a small angle can pass through, and light at a large angle cannot pass through the first microcavity, thereby achieving a narrow viewing angle display. When no voltage is applied to the first microcavity, the amount of blue light passing through the first microcavity remains unchanged, and the blue light can all pass through the first microcavity, thereby achieving a wide viewing angle display.

[0112] In this embodiment, by controlling the voltage of the first microcavity, the amount of light emitted through the first microcavity can be adjusted, thereby achieving switchable display between wide viewing angle and narrow viewing angle of the display panel.

[0113] In one embodiment, see Figure 20 As shown, the liquid crystal unit further includes: a second microcavity, which is arranged between the pixel unit and the light source unit. The above-mentioned method of controlling the voltage of the first microcavity to adjust the amount of light emitted by the light source unit passing through the first microcavity to perform viewing angle switching display includes:

[0114] S201 , when a voltage is applied to the second microcavity, the amount of light emitted by the light source unit passing through the second microcavity is reduced, and a first light beam is obtained.

[0115] S202: Process the first light through the pixel unit to obtain processed light.

[0116] S203 , when a voltage is applied to the first microcavity, the amount of light emitted from the processed light passing through the first microcavity is reduced, so as to perform narrow viewing angle display through the first microcavity.

[0117] S204 , when no voltage is applied to the first microcavity, the amount of light emitted by the processed light passing through the first microcavity remains unchanged, so as to perform wide viewing angle display through the first microcavity.

[0118] As an implementation method, taking a display panel that is a blue-phase liquid crystal display panel, in which the liquid crystal molecules included are blue-phase liquid crystal molecules, and the first pixel subunit is an R pixel unit as an example, when a voltage is applied to the light source unit, the light source unit generates blue light and emits the blue light into the second microcavity. When a voltage is applied to the second microcavity, the amount of light emitted by the light source unit that passes through the second microcavity decreases, thereby obtaining the first light. Specifically, the second microcavity only allows blue light at a small angle to pass through, and blue light at a large angle cannot pass through the second microcavity. At this time, the first light reaches the R pixel unit, which excites the first light to generate red light and emits the red light into the first microcavity. The red light emitted by the R pixel unit is light at various angles. When a voltage is applied to the first microcavity, the amount of red light that passes through the first microcavity decreases, that is, the first microcavity only allows red light at a small angle to pass through, and red light at a large angle cannot pass through the first microcavity, thereby achieving a narrow viewing angle display. When no voltage is applied to the first microcavity, the amount of red light passing through the first microcavity remains unchanged. The light emitted by the R pixel unit is red light at all angles and can be emitted at a large angle to achieve wide viewing angle display.

[0119] The light source unit generates blue light and emits it into the second microcavity. When no voltage is applied to the second microcavity, the second microcavity allows blue light from all angles to reach the R pixel unit. The R pixel unit excites the blue light to generate red light and emits this red light into the first microcavity. When a voltage is applied to the first microcavity, the amount of red light emitted through the first microcavity decreases. That is, the first microcavity only allows red light from small angles to pass through, while red light from large angles cannot pass through the first microcavity, thereby achieving narrow viewing angle display. When no voltage is applied to the first microcavity, the light emitted by the R pixel unit is red light from all angles. The amount of light emitted from the first microcavity remains unchanged and can be emitted from a large angle, achieving wide viewing angle display.

[0120] As another possible implementation, taking the first pixel subunit as a G pixel unit, when a voltage is applied to the light source unit, the light source unit generates blue light and emits this blue light into the second microcavity. When a voltage is applied to the second microcavity, the amount of light emitted by the light source unit that passes through the second microcavity decreases, thereby producing the first light. Specifically, the second microcavity only allows blue light to pass through at small angles, while blue light at large angles cannot pass through the second microcavity. At this time, the first light reaches the G pixel unit, which excites the first light to generate green light and emits this green light into the first microcavity. The green light emitted by the G pixel unit is light at various angles. When a voltage is applied to the first microcavity, the amount of green light that passes through the first microcavity decreases, namely, the first microcavity only allows green light at small angles to pass through, while green light at large angles cannot pass through the first microcavity, thereby achieving a narrow viewing angle display. When no voltage is applied to the first microcavity, the amount of green light that passes through the first microcavity remains unchanged. The light emitted by the G pixel unit is green light at various angles, which can be emitted at large angles, achieving a wide viewing angle display.

[0121] The light source unit generates blue light and emits it into the second microcavity. When no voltage is applied to the second microcavity, the second microcavity allows blue light at all angles to reach the G pixel unit. The G pixel unit excites the blue light to generate green light and emits this green light into the first microcavity. When a voltage is applied to the first microcavity, the amount of green light emitted through the first microcavity decreases. That is, the first microcavity only allows green light at small angles to pass through, and green light at large angles cannot pass through the first microcavity, thereby achieving narrow viewing angle display. When no voltage is applied to the first microcavity, the light emitted by the G pixel unit is green light at all angles. The amount of light emitted through the first microcavity remains unchanged and can be emitted at a large angle, achieving wide viewing angle display.

[0122] As another possible implementation, when a voltage is applied to the light source unit, the light source unit generates blue light and emits the blue light into the second microcavity. When a voltage is applied to the second microcavity, the amount of blue light emitted by the light source unit that passes through the second microcavity decreases, thereby obtaining a first light beam. Specifically, the second microcavity only allows blue light at a small angle to pass through, while blue light at a large angle cannot pass through the second microcavity. The first light beam is a small-angle blue light. At this time, the small-angle blue light remains as small-angle light after reaching the transparent layer material and is emitted into the first microcavity. When no voltage is applied to the first microcavity, the amount of blue light that passes through the first microcavity remains unchanged. Ultimately, the small-angle blue light remains as small-angle blue light after passing through the first microcavity, thereby achieving a narrow viewing angle display.

[0123] When no voltage is applied to the second microcavity and a voltage is applied to the light source unit corresponding to the B pixel unit, the light source unit generates blue light and emits the light to the second microcavity. The second microcavity allows blue light of all angles to pass through. After passing through the transparent layer material, it remains blue light at a large angle and is emitted to the first microcavity. When no voltage is applied to the first microcavity, the blue light at a large angle ultimately remains blue light at a large angle after passing through the first microcavity, thereby achieving a wide-viewing angle display.

[0124] The display control method in this embodiment controls the blue phase liquid crystal display screen with different voltages through electrodes, so that the blue phase liquid crystal molecules in the microcavity exhibit different refractive indices, further enabling the blue phase liquid crystal molecules to selectively transmit light of different wavelengths. Since the display panel is selective to light at different viewing angles, the viewing angle can be controlled, solving the technical problem that existing micro LED or QD-Micro LED products are difficult to achieve viewing angle control.

[0125] On the other hand, an embodiment of the present application provides a display device, including the display panel 100 provided by the above embodiment.

[0126] The display device of the present application, by adopting the display panel 100 of the above embodiment, includes a display unit and a liquid crystal unit. The display unit includes a display substrate and a light source unit. The display substrate is arranged on the backlight side of the light source unit, and the liquid crystal unit is located on the side of the light source unit away from the display substrate. The liquid crystal unit includes a first microcavity. By controlling the voltage of the first microcavity, the amount of light emitted by the light source unit passing through the first microcavity is adjusted to achieve viewing angle switching display. In the display panel provided by the present application, since the first microcavity is provided in the liquid crystal unit, the liquid crystal molecules can exhibit different refractive indices by controlling the voltage of the first microcavity, thereby adjusting the amount of light emitted by the light source unit passing through the first microcavity, thereby facilitating the switching display between wide and narrow viewing angles of the display panel.

[0127] Based on the above embodiments, Figure 21 As shown, the display device 200 includes the above-mentioned display panel 100, and the display panel 100 is used to display a user interface (UI). The user interface may include graphics, text, icons, videos, and any combination thereof.

[0128] In addition, the display device 200 also includes a microprocessor 201 and a memory 202. The microprocessor 201 may include one or more processing cores, such as a quad-core microprocessor or an octa-core microprocessor. The microprocessor 201 may be implemented in at least one hardware form selected from the group consisting of a digital signal processing (DSP), a field programmable gate array (FPGA), and a programmable logic array (PLA).

[0129] The microprocessor 201 may also include a main processor and a coprocessor. The main processor is a processor for processing data in the awake state, also known as a central processing unit (CPU); the coprocessor is a low-power processor for processing data in the standby state.

[0130] In addition, the microprocessor 201 may be integrated with a graphics processing unit (GPU), which is used to render and draw the content to be displayed on the display screen. In some embodiments, the microprocessor 201 may also include an artificial intelligence (AI) processor, which is used to handle computing operations related to machine learning.

[0131] The memory 202 may include one or more computer-readable storage media, which may be non-transitory, and may also include high-speed random access memory and non-volatile memory, such as one or more magnetic disk storage devices and flash memory storage devices.

[0132] In some embodiments, the display device may further include a peripheral device interface 203 and at least one peripheral device. The microprocessor 201, the memory 202, and the peripheral device interface 203 may be connected via a bus or signal lines. Each peripheral device may be connected to the peripheral device interface 203 via a bus, signal lines, or circuit boards.

[0133] Specifically, the peripheral devices include, but are not limited to, a radio frequency circuit 204, a sensor 205, and a power supply 206. The peripheral device interface 203 can be used to connect at least one peripheral device related to input / output (I / O) to the microprocessor 201 and the memory 202. In some embodiments, the microprocessor 201, the memory 202, and the peripheral device interface 203 are integrated on the same chip or circuit board; in some other embodiments, any one or two of the microprocessor 201, the memory 202, and the peripheral device interface 203 can be implemented on separate chips or circuit boards, which is not limited in the present embodiment.

[0134] The radio frequency circuit 204 is used to receive and transmit radio frequency (RF) signals, also known as electromagnetic signals. The radio frequency circuit 204 communicates with communication networks and other communication devices via electromagnetic signals. The radio frequency circuit 204 converts electrical signals into electromagnetic signals for transmission, or converts received electromagnetic signals into electrical signals. Optionally, the radio frequency circuit 204 includes an antenna system, an RF transceiver, one or more amplifiers, a tuner, an oscillator, a digital signal processor, a codec chipset, a user identity module card, etc. The radio frequency circuit 204 can communicate with other devices via at least one wireless communication protocol. Such wireless communication protocols include, but are not limited to, metropolitan area networks, various generations of mobile communication networks (2G, 3G, 4G, and 5G), wireless local area networks, and / or wireless fidelity (WiFi) networks. In some embodiments, the radio frequency circuit 204 may also include circuits related to near field communication (NFC).

[0135] The sensor 205 includes one or more sensors for providing status assessments of various aspects for the display device. Among them, the sensor 205 includes an acceleration sensor. For example, the sensor 205 can detect the on / off state of the display device, and can also detect changes in the position of the display device, the presence or absence of contact between the user and the display device, the orientation or acceleration / deceleration of the display device, and the temperature change of the display device. The sensor 205 can also include an optical sensor, such as a complementary metal oxide semiconductor (CMOS) or a charge-coupled device (CCD) photosensitive imaging element for use in imaging applications. In some embodiments, the sensor 205 can also include a pressure sensor, a gyroscope sensor, and a magnetic sensor.

[0136] Those skilled in the art will understand that Figure 21The structure shown in the figure does not constitute a limitation on the display device, and may include more or fewer components than shown in the figure, or combine certain components, or adopt a different component arrangement.

[0137] It should be noted that the display device in the embodiment of the present application can be a television, or it can be a PC, a smart phone, a tablet computer, an e-book reader, an in-vehicle smart terminal, an MP3 (Moving Picture Experts Group Audio Layer III, Moving Picture Experts Compression Standard Audio Layer) player, an MMP4 (Moving Picture Experts Group Audio Layer IV, Moving Picture Experts Compression Standard Audio Layer) player, a portable computer, and other display devices with display functions.

[0138] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the invention herein is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the inventive concept. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features having similar functions disclosed in this application.

Claims

1. A display panel, characterized in that: include: a display unit, the display unit comprising a display substrate and a light source unit, the display substrate being disposed on a backlight side of the light source unit; A liquid crystal unit is located on a side of the light source unit away from the display substrate. The liquid crystal unit includes a first microcavity. By controlling the voltage of the first microcavity, the amount of light emitted by the light source unit passing through the first microcavity is adjusted to perform viewing angle switching display.

2. The display panel according to claim 1, wherein: The liquid crystal unit includes an anode and a cathode. The anode is located on a side of the light source unit away from the display substrate. The cathode is located on a side of the anode away from the light source unit. The first microcavity is arranged between the anode and the cathode.

3. The display panel according to claim 2, wherein: The liquid crystal unit further includes a first substrate and a second substrate. The first substrate is disposed between the anode and the light source unit, and the second substrate is located on a side of the cathode away from the first microcavity.

4. The display panel according to claim 1, wherein: The liquid crystal unit further includes: a pixel unit, the pixel unit being located between the light source unit and the first microcavity, the pixel unit being configured to process the light emitted by the light source unit to obtain processed light; When a voltage is applied to the first microcavity, the processed light passes through the first microcavity for narrow viewing angle display; when no voltage is applied to the first microcavity, the processed light passes through the first microcavity for wide viewing angle display.

5. The display panel according to claim 4, wherein: The pixel unit includes: a first pixel sub-unit, the first pixel sub-unit being used to convert the light emitted by the light source unit to obtain converted light; When a voltage is applied to the first microcavity, the converted light passes through the first microcavity for narrow viewing angle display; when no voltage is applied to the first microcavity, the converted light passes through the first microcavity for wide viewing angle display.

6. The display panel according to claim 5, wherein: The pixel unit further includes: a second pixel sub-unit, the second pixel sub-unit being configured to perform propagation processing on the light emitted by the light source unit to obtain propagated light; When a voltage is applied to the first microcavity, the propagated light passes through the first microcavity for narrow viewing angle display; when no voltage is applied to the first microcavity, the propagated light passes through the first microcavity for wide viewing angle display.

7. The display panel according to claim 6, wherein: The first pixel subunit includes a red pixel subunit and a green pixel subunit, the voltage applied by the first microcavity corresponding to the red pixel subunit is greater than the voltage applied by the first microcavity corresponding to the green pixel subunit, and the voltage applied by the first microcavity corresponding to the green pixel subunit is greater than the voltage applied by the first microcavity corresponding to the second pixel subunit.

8. The display panel according to claim 4, wherein: The liquid crystal unit further includes a second microcavity, which is arranged between the pixel unit and the light source unit.

9. The display panel according to claim 8, wherein: When a voltage is applied to the second microcavity, the light emitted by the light source unit passes through the second microcavity for narrow viewing angle display; when no voltage is applied to the second microcavity, the light emitted by the light source unit passes through the second microcavity for wide viewing angle display.

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

11. A display control method for a display panel, characterized in that: Applied to the display panel according to any one of claims 1 to 9, the method comprises: By controlling the voltage of the first microcavity, the light output amount of the light emitted by the light source unit passing through the first microcavity is adjusted to perform viewing angle switching display.

12. The method according to claim 11, characterized in that By controlling the voltage of the first microcavity, the light output amount of the light emitted by the light source unit passing through the first microcavity is adjusted to perform viewing angle switching display, comprising: When a voltage is applied to the first microcavity, the amount of light emitted by the light source unit passing through the first microcavity is reduced, so that a narrow viewing angle display is performed through the first microcavity; When no voltage is applied to the first microcavity, the amount of light emitted by the light source unit passing through the first microcavity remains unchanged, so that a wide viewing angle display is performed through the first microcavity.

13. The method according to claim 11, characterized in that The liquid crystal unit further includes a pixel unit, the pixel unit being located between the light source unit and the first microcavity; and the amount of light emitted by the light source unit passing through the first microcavity is adjusted by controlling the voltage of the first microcavity to perform viewing angle switching display, including: Processing the light emitted by the light source unit through the pixel unit to obtain processed light; When a voltage is applied to the first microcavity, the amount of light emitted by the processed light passing through the first microcavity is reduced, so as to perform narrow viewing angle display through the first microcavity; When no voltage is applied to the first microcavity, the amount of light emitted by the processed light passing through the first microcavity remains unchanged, so that a wide viewing angle display is performed through the first microcavity.

14. The method according to claim 13, characterized in that The liquid crystal unit further includes: a second microcavity, which is arranged between the pixel unit and the light source unit; the pixel unit processes the light emitted by the light source unit to obtain processed light, including: When a voltage is applied to the second microcavity, the amount of light emitted by the light source unit passing through the second microcavity decreases, thereby obtaining a first light beam; The first light is processed by the pixel unit to obtain processed light.

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