CN115903301A

CN115903301A - Electronic device

Info

Publication number: CN115903301A
Application number: CN202111166927.9A
Authority: CN
Inventors: 田智浩; 段耿耿; 孟现策; 魏建宾
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2023-04-04
Also published as: WO2023051047A1

Abstract

The embodiment of the application provides electronic equipment, relates to the technical field of display, and can support high peak brightness of a luminous area with any specific percentage in a display picture. The electronic equipment comprises a backlight module and a liquid crystal panel; the backlight module comprises a back plate, a leveling plate, a lamp plate and a diffusion plate; the lamp panel is positioned between the leveling plate and the diffusion plate; the electronic device further includes: the lamp comprises a first power panel, a second power panel and light-emitting units arranged on a lamp panel, wherein a unit area at any position on the lamp panel at least comprises two light-emitting units; the first power panel is connected with a first light-emitting unit in the unit area on the lamp panel, and the second power panel is connected with a second light-emitting unit in the unit area on the lamp panel.

Description

Electronic device

Technical Field

The embodiment of the application relates to the technical field of display, in particular to an electronic device.

Background

At present, in order to improve the contrast of liquid crystal panel display in the large-screen industry, the scheme of the backlight module is improved from global light control to subarea light control. Therefore, in the display picture of the liquid crystal panel, when the bright area and the dark area exist simultaneously, the bright area is brighter in the light emitting area corresponding to the backlight module, the dark area is darker in the light emitting area corresponding to the backlight module, and the individual light emitting area can be only lightened under the individual scene, and other light emitting areas are closed, so that the purpose of reducing power consumption is achieved.

However, in some high-end products, high-dynamic range (HDR) authentication is generally performed to enhance competitiveness of the high-end products. And to pass HDR certification requires that the test window of the product support display be a high peak luminance for any particular percentage of light emitting areas (e.g., light emitting areas where the test window may be 1%,10%,20%,30%,40%, etc. of the display). The current industry multi-partition backlight schemes include: the light-emitting units of all light-emitting areas of the whole backlight module are connected with the same power panel, and a high-power panel supplies power to all the light-emitting areas; or, the whole backlight module is divided into a plurality of light-emitting areas, and each light-emitting area in the plurality of light-emitting areas is respectively supplied with power by a low-power supply board. The solution using the low power supply board can only provide low power for the corresponding light emitting area, and cannot support high peak brightness of a certain percentage (e.g. 10%) of the light emitting areas in the display screen specified by the HDR authentication.

Disclosure of Invention

Embodiments of the present application provide an electronic device capable of supporting high peak luminance of any specific percentage of light emitting areas in a display screen.

In a first aspect, an electronic device is provided. The electronic device comprises a backlight module and a liquid crystal panel, wherein the liquid crystal panel is arranged on the light emitting side of the backlight module. The backlight module comprises a back plate, a leveling plate, a lamp plate and a diffusion plate; wherein, the leveling plate is located between backplate and the lamp plate, the lamp plate is located between leveling plate and the diffuser plate. The electronic device further includes: the lamp comprises a first power panel, a second power panel and light-emitting units arranged on a lamp panel, wherein a unit area at any position on the lamp panel at least comprises two light-emitting units; the first power panel is connected with a first light-emitting unit in a unit area on the lamp panel, and the second power panel is connected with a second light-emitting unit in the unit area on the lamp panel. The unit area is a regular area of any size at any position on the lamp panel, and is not limited to a shape, and may be, for example, a circle or a polygon (e.g., a square, a diamond, a triangle, etc.); in some examples, it may be interpreted as a minimum area to be simultaneously supplied with power by the first power supply plate and the second power supply plate, for example, the unit area may include two light emitting cells. Therefore, as the light-emitting units powered by the first power supply board and the second power supply board exist in each unit area, the power of each power supply board can be output to the unit area, and therefore, in the display picture of the liquid crystal panel, when a bright area and a dark area exist simultaneously, the power of each power supply board can be output to one or more unit areas corresponding to the bright area on the lamp panel, so that the bright area is brighter, the dark area corresponding to the lamp panel is darker, and the high peak brightness of the light-emitting area with any specific percentage in the display picture can be supported.

In one possible implementation manner, the first power supply board is connected with the first n columns of light-emitting units in the 2n columns of light-emitting units which are continuously distributed, the second power supply board is connected with the last n columns of light-emitting units in the 2n columns of light-emitting units which are continuously distributed, and n is a positive integer greater than or equal to 1. In this embodiment, the rows of the light emitting units connected to the first power board and the rows of the light emitting units connected to the second power board are distributed at intervals, for example, in any one group of 2n consecutive rows of light emitting units on the lamp panel, the first power board is connected to the front n rows of light emitting units, the second power board is connected to the rear n rows of light emitting units, specifically, for example, in one group of 2 consecutive rows of light emitting units, the first power board is connected to the 1 st row of light emitting units, and the second power board is connected to the 2 nd row of light emitting units; for example, in a group of 4 consecutive rows of light emitting cells, the first power supply board is connected to the 1 st row and the 2 nd row of light emitting cells, and the second power supply board is connected to the 3 rd row and the 4 th row of light emitting cells.

In a possible implementation manner, the first power supply board is connected with the first n rows of light-emitting units in the 2n rows of light-emitting units which are continuously distributed, the second power supply board is connected with the last n rows of light-emitting units in the 2n rows of light-emitting units which are continuously distributed, and n is a positive integer greater than or equal to 1. In this embodiment, the rows of the light emitting units connected to the first power board are distributed at intervals with the rows of the light emitting units connected to the second power board, for example, in any one group of consecutive 2n rows of light emitting units on the lamp panel, the first power board is connected to the front n rows of light emitting units, the second power board is connected to the rear n rows of light emitting units, specifically, for example, in a group of consecutive 2 rows of light emitting units, the first power board is connected to the 1 st row of light emitting units, and the second power board is connected to the 2 nd row of light emitting units; for example, in a group of 4 consecutive rows of light emitting cells, the first power supply board is connected to the 1 st and 2 nd rows of light emitting cells, and the second power supply board is connected to the 3 rd and 4 th rows of light emitting cells.

In one possible implementation, the unit area includes a plurality of sub-light-emitting areas, the sub-light-emitting areas include one or more light-emitting units, the first power supply board supplies power to the light-emitting units in at least one of the plurality of sub-light-emitting areas, for example, the first sub-light-emitting area, and the second power supply board supplies power to the light-emitting units in at least one other of the plurality of sub-light-emitting areas, for example, the second sub-light-emitting area. In a specific example, the unit region includes a first sub-light-emitting region including the first light-emitting unit and a second sub-light-emitting region including the second light-emitting unit; the first power panel is connected with the first light-emitting unit in the first sub light-emitting area; the second power panel is connected with the second light-emitting unit in the second sub-light-emitting area.

In one possible implementation, in order to ensure uniform brightness within each unit area, the number of sub-light-emitting areas powered by the first power supply plate in the unit area is the same as the number of sub-light-emitting areas powered by the second power supply plate.

In one possible implementation, the first power supply board and the second power supply board are connected to the plurality of sub-light emitting areas in the unit area in a predetermined order for convenience of circuit design. In each unit area, the first power supply board and the second power supply board are connected with the plurality of sub-light-emitting areas in the same sequence, and therefore the design of the circuit is simplified.

In one possible implementation, the number of light emitting cells powered by the first power strip in a unit area is the same as the number of light emitting cells powered by the second power strip. This ensures that the brightness within each unit area is uniform.

In one possible implementation manner, the power panel is connected with the anode of the light-emitting unit, the cathode of the light-emitting unit is connected to the ground GND through the driving unit, and the driving unit is connected with the controller; a controller configured to control the driving unit to supply a predetermined current to the light emitting unit. For example, the controller controls the magnitude of the predetermined current using a Pulse Width Modulation (PWM) signal output to the driving unit, thereby implementing PWM dimming. Specifically, the PWM dimming is to adjust the magnitude of a predetermined current provided by the driving unit to the light emitting unit by controlling the duty ratio of the PWM signal, so as to adjust the brightness, for example, when the duty ratio of the PWM signal is 100%, the driving unit provides the maximum current to the light emitting unit, and the light emitting unit operates at the maximum brightness.

In one possible implementation, the light-emitting unit comprises one or more light-emitting diodes, LEDs, connected in series.

In one possible implementation manner, in order to satisfy the HDR certification of high dynamic lighting rendering, the unit area is smaller than or equal to the test window of the HDR certification of high dynamic lighting rendering, that is, the test window may correspond to one or more unit areas.

In one possible implementation, the area of the unit area is less than or equal to one tenth of the light emitting area of the lamp panel. Usually, the HDR certification defines a test window of 10% of the light emitting area of the lamp panel, and it is of course possible to perform HDR certification in a smaller or larger test window based on different HDR certification standard requirements, for example, the test window may be 1%,10%,20%,30%,40% of the display screen.

Drawings

Fig. 1 is a schematic overall structure diagram of an electronic device according to an embodiment of the present application;

FIG. 2 is a schematic illustration of an exploded view of a screen assembly provided by an embodiment of the present application;

fig. 3 is a schematic structural diagram of a sub-lamp panel provided in an embodiment of the present application;

fig. 4 is a schematic structural view of a sub-lamp panel according to another embodiment of the present application;

fig. 5 is a schematic structural diagram of a connector provided in an embodiment of the present application;

fig. 6 is a schematic diagram illustrating a connection structure of a control module and a connector according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of a driving circuit of a light emitting unit according to an embodiment of the present application;

fig. 8 is a schematic view illustrating a connection structure between a power board and a light emitting unit according to an embodiment of the present disclosure;

fig. 9 is a schematic diagram of a distribution structure of light emitting units provided in an embodiment of the present application;

fig. 10 is a schematic view illustrating a connection structure between a power board and a light emitting unit according to another embodiment of the present application;

fig. 11 is a schematic view illustrating a connection structure between a power board and a light emitting unit according to yet another embodiment of the present application;

fig. 12 is a schematic view of a distribution structure of light emitting units according to another embodiment of the present application;

fig. 13 is a schematic view illustrating a distribution structure of light emitting units according to still another embodiment of the present application;

fig. 14 is a schematic view illustrating a distribution structure of light emitting units according to still another embodiment of the present application;

fig. 15 is a schematic view of a distribution structure of light emitting units according to another embodiment of the present application;

fig. 16 is a schematic view illustrating a connection structure between a power board and a light emitting unit according to still another embodiment of the present application;

fig. 17 is a schematic view of a distribution structure of light emitting units according to still another embodiment of the present application;

fig. 18 is a schematic view illustrating a connection structure between a power board and a light emitting unit according to another embodiment of the present application;

fig. 19 is a schematic view illustrating a connection structure of a power board and a light emitting unit according to still another embodiment of the present application;

fig. 20 is a schematic view illustrating a connection structure between a power board and a light emitting unit according to still another embodiment of the present application;

fig. 21 is a schematic view illustrating a distribution structure of light emitting units according to still another embodiment of the present application;

fig. 22 is a schematic view illustrating a connection structure between a power board and a light emitting unit according to another embodiment of the present disclosure;

fig. 23 is a schematic view of a distribution structure of light emitting units according to another embodiment of the present application;

fig. 24 is a schematic view illustrating a connection structure between a power board and a light emitting unit according to yet another embodiment of the present application;

FIG. 25 is a diagram of an image frame provided by an embodiment of the present application;

fig. 26 is a schematic view of a distribution structure of light emitting units according to still another embodiment of the present application.

Detailed Description

The technical solutions in some embodiments of the present application will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the examples provided herein fall within the scope of the present application.

Unless the context requires otherwise, throughout the description and the claims, the term "comprise" and its other forms, such as the third person's singular form "comprising" and the present participle form "comprising" are to be interpreted in an open, inclusive sense, i.e. as "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" and the like are intended to indicate that a particular feature, structure, material, or characteristic related to the embodiment or example is included in at least one embodiment or example of the present application. The schematic representations of the above terms are not necessarily referring to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be included in any suitable manner in any one or more embodiments or examples.

In the following, the terms "first", "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present application, the meaning of "a plurality" is two or more unless otherwise specified. Additionally, the use of "based on" means open and inclusive, as a process, step, calculation, or other action that is "based on" one or more stated conditions or values may in practice be based on additional conditions or values beyond those stated.

In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application. In the description of the present application, "a plurality" means two or more unless otherwise specified.

The technical solution in the present application will be described below with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of an electronic device 100 according to an embodiment of the present disclosure. The electronic device 100 may be a large-screen electronic device such as an advertisement screen (billboard), a display, a television (e.g., a smart screen), a notebook computer, a tablet computer, and a vehicle-mounted device. Optionally, in some scenarios, the electronic device 100 may be a device such as a mobile phone, an electronic reader, or a wearable device. The embodiment shown in fig. 1 is described by taking the electronic device 100 as a television as an example.

Electronic device 100 may include a housing 110 and a screen assembly 200.

The housing 110 may include a bezel and a rear cover. The frame may surround a periphery of the rear cover. The housing 110 may include, for example, a middle frame of the electronic device 100. In one example, the middle frame of the electronic device 100 may be received within an inner perimeter of the bezel. In another example, a middle frame of the electronic device 100 may serve as a bezel of the housing 110. Screen assembly 200 may be an assembly that provides display functionality for electronic device 100. A user may view the screen assembly 200 to enjoy media assets such as images, videos, and the like. The screen assembly 200 may be mounted on the housing 110. The perimeter of screen assembly 200 may abut the inner edge of the bezel. The bezel may secure the screen assembly 200 to the housing 110. The screen assembly 200 and the rear cover may be respectively installed at both sides of the bezel so that the housing 110 may provide a mechanical protection function for devices inside the electronic apparatus, particularly devices on the screen assembly 200. The screen assembly 200 may be secured to a center frame of the electronic device 100, for example.

The electronic device 100 may also include a control module. The specific implementation form of the control module may include, for example, a processor, a controller, a connector, a driver board, an integrated circuit, a chip, a power board, and the like. The screen assembly 200 may be configured with a control module, for example, which may be housed in the housing 110. In one example, a control module may include at least one communication interface, a bus, at least one processor, and at least one memory. The at least one communication interface, the at least one processor, and the at least one memory may communicate with each other over a bus. At least one communication interface may be used to receive and transmit signals. For example, the lighting units of the screen assembly 200 may be connected to one of the communication interfaces such that the control module may trigger the lighting units to emit light. The at least one memory is for storing application program code. The application code may for example comprise code controlling the lighting unit to emit light or not. The at least one processor may be configured to execute the above-mentioned application program code to enable control of the lighting unit. In the present application, "at least one" includes, for example, one or more of the two cases.

Referring now to fig. 2, a screen assembly 200 provided by an embodiment of the present application is illustrated. Fig. 2 is an exploded view of screen assembly 200. The panel assembly 200 shown in fig. 2 includes a backlight module 210 and a liquid crystal panel 220 disposed at a light-emitting side of the backlight module 210. The backlight module 210 may include a back plate 211, a flat plate 212, a lamp plate 213, a diffusion plate 214, an optical film 215, and the like, which are stacked. Of course, the above description of fig. 2 is merely exemplary in nature, and a general structure of the backlight module 210 is provided, and in some examples, the backlight module 210 may further include more or less components than those described above.

The back plate 211 may have functions of supporting the electronic device 100, providing mechanical protection for electronic components within the electronic device 100, and the like. The material of the back plate 211 may be a material that satisfies the requirement of mechanical strength and can play a supporting role. For example, the back plate 211 may be a metal material such as stainless steel, aluminum alloy, zinc alloy, titanium alloy, or the like. For another example, the back plate 211 may be a non-metallic material such as resin. Backplate 211 can include first backplate terminal surface and second backplate terminal surface, and lamp plate 213 is close to first backplate terminal surface, and lamp plate 213 is kept away from to second backplate terminal surface. For a user, the first backplane end may correspond to a front side of the electronic device 100 and the second backplane end may correspond to a back side of the electronic device 100. The front side of the electronic device 100 may be the side of the electronic device 100 that is often observed when the user is using the electronic device 100. The back of the electronic device 100 may be disposed opposite the front of the electronic device 100, and the back of the electronic device 100 may be a side of the electronic device 100 that is not often viewed when a user uses the electronic device 100. For example, the electronic device 100 may be a television, and the side of the television on which the screen assembly is mounted may be the front of the television; the side of the television on which the rear cover is mounted may be the back of the television. The first backplane end face corresponds to the front face of the electronic device 100, and may be viewed by a user looking at the backplane 211 along a direction of the front face of the electronic device 100. The second backplane end face corresponds to the back surface of the electronic device 100, and may be observed when the backplane 211 is observed along a direction in which a user observes the back surface of the electronic device 100. For convenience of description, the first back plate end face may be referred to as a front surface of the back plate 211, and the second back plate end face may be referred to as a back surface of the back plate 211. In one possible example, the first backplane end surface may be fixed to the back cover of the housing 110. For example, the first back plate end surface may be fixed to the back cover of the housing 110 by a mechanical connector such as a screw, double-sided tape, foam, etc. In other possible examples, the back plate 211 may serve as a back cover of the housing 110.

The leveling plate 212 may be located between the lamp panel 213 and the back panel 211. The leveling plate 212 may be used to provide support for the lamp panel 213 to maintain or ensure the flatness of the lamp panel 213. The planarizing plate 212 may be a conductive material having a certain rigidity. For example, the leveling plate 212 may be an aluminum plate. The flat plate 212 may be fixed to the back plate 211 by a mechanical connector such as double-sided tape or foam. In a possible scenario, the electronic device 100 may collide, fall, and the like during the transportation of the electronic device 100. In this case, the electronic apparatus 100 may endure an external force to some extent. The back plate 211 may be deformed accordingly to resist the external force. If the lamp panel 213 is directly fixed to the back panel 211, the lamp panel 213 may follow the back panel 211 to deform relatively significantly. To avoid this, the difficulty of transporting the electronic device 100 is increased. If the back plate 211 is deformed relatively significantly, this is not favorable for the display effect of the lamp panel 213. For example, due to different light mixing distances in different areas of the lamp panel 213, the electronic device 100 may have display problems such as uneven brightness and ghost images. The leveling plate 212 is disposed between the back plate 211 and the lamp plate 213, so that the leveling plate 212 can perform a transition function between the lamp plate 213 and the back plate 211 in terms of deformation. The deformation amount of the leveling plate 212 may be smaller than that of the back plate 211, and thus the deformation amount of the lamp panel 213 may have a tendency to decrease. That is, in the case where the back panel 211 is relatively significantly deformed, the amount of deformation of the lamp panel 213 may be relatively small as possible or relatively insignificant as possible.

Optical film 215 may change the frequency of light from lamp panel 213. The optical film 215 may include quantum dots. For example, the lamp panel 213 may emit high-energy blue light; the blue light may excite the quantum dots encapsulated in the optical film 215, so that the quantum dots may convert the blue light emitted from the lamp panel 213 into white light (the quantum dots may be a nano-scale semiconductor; the quantum dots may emit light of a specific frequency by applying a certain electric field or light pressure to the quantum dots). Quantum dots can be formed, for example, in a chemical coating, phosphor powder in one possible example, light emitted from the optical film 215 can enter the liquid crystal panel 220, for example. The liquid crystal panel 220 may include a liquid crystal layer and a filter layer. The liquid crystal of the liquid crystal layer may control the liquid crystal cell to be turned on or off to control the intensity of the white light passing through the liquid crystal cell. By turning on the liquid crystal cell, white light passing through the liquid crystal cell can be irradiated on the filter layer. The filter layer may include a red filter, a green filter, and a blue filter. A red filter may be used to convert white light to red light. A green filter may be used to convert white light into green light. A blue filter may be used to convert white light into blue light. Thereby, the electronic device 100 can be controlled to emit light of various colors to display a color pattern.

In other examples, the diffuser plate 214 may include quantum dots, so the diffuser plate 214 may change the frequency of light from the lamp panel 213. In some embodiments, the diffuser plate 214 may be integrally formed with the optical film 215. The light emitted from the lamp panel 213 may be mixed only without other optical processes and directly enter the diffuser plate 214. That is, in some possible scenarios, no quantum dots may be configured on the light emitting unit of the lamp panel 213. This is favorable to reducing the structural complexity of lamp plate 213, is favorable to the luminescence unit can arrange on lamp plate 213 closely relatively. For example, the size of the phosphor is usually larger than the size of the light emitting unit of the lamp panel 213, and the phosphor is packaged on the lamp panel 213, which is not favorable for the tight arrangement of the light emitting units.

In some examples, light panel 213 may also include a plurality of sub-light panels 2130 distributed in an array. The following description will be given taking one sub lamp plate 2130 as an example. Sub lamp panel 2130 may include first lamp panel end 2131 and second lamp panel end 2132. Fig. 3 is a schematic structural diagram of a first lamp panel end surface 2131 of a seed lamp panel 2130 provided in this embodiment of the application. The light emitted from the sub lamp panels 2130 may be emitted from the first lamp panel end surfaces 2131 of the sub lamp panels 2130. The first lamp panel end surface 2131 of the sub lamp panel 2130 may be a surface of the sub lamp panel 2130 close to the diffuser plate 214 and far from the back plate 211. The structure of the first lamp panel end surface 2131 of the sub lamp panel 2130 is described below with reference to fig. 3. The sub lamp panel 2130 may include a plurality of light emitting units 2133. For example, the sub lamp plate 2130 may include a plurality of light emitting units 2133 arranged in an array. The light-emitting unit 2133 may be, for example, a chip having a light-emitting function. The light emitting unit 2133 may also be a light emitting diode LED. Fig. 4 is a schematic structural diagram of a second lamp panel end surface 2132 of a seed lamp panel 2130 provided in an embodiment of the present application. The second lamp panel end surface 2132 of the sub lamp panel 2130 may be disposed close to the back panel 211 and far from the diffusion plate 214. Next, referring to fig. 4, the structure of the second lamp panel end surface 2132 of the sub lamp panel 2130 is described. The second lamp panel end surface 2132 of the sub lamp panel 2130 may be provided with a double-sided adhesive tape, which may fixedly connect the sub lamp panel 2130 with the leveling plate 212. In one possible example, the double-sided adhesive tape may be a thermally conductive adhesive tape 2134. Because the sub lamp panels 2130 may generate relatively high heat during operation, the heat conducting glue 2134 is favorable for transferring the heat of the sub lamp panels 2130 to the leveling plate 212, and is favorable for improving the heat dissipation performance of the electronic device 100.

Second lamp panel end surface 2132 of sub-lamp panel 2130 may also be provided with a conductive resilient tab 2135. One end of the conductive clip 2135 may be electrically connected to the sub-lamp plate 2130. The other end of the conductive elastic piece 2135 can abut against the flat plate 212. In the case where the sub lamp plates 2130 are operated, the light emitting units 2133 of the sub lamp plates 2130 may accumulate electric charges. The conductive elastic piece 2135 can make the sub-lamp board 2130 grounded, which is favorable for improving electromagnetic compatibility (EMC) of the electronic device 100.

The sub lamp plates 2130 may also include one or more drive units 2136 (also may be referred to as drivers or drive circuits), one or more connectors 2137. Through the connector 2137, a signal related to the sub lamp board 2130 may be input to the driving unit 2136. In one example, the signals input by the connector 2137 to the signal driving unit 2136 may include electrical signals and control signals. The electrical signal may be used to provide driving power to the driving unit 2136 and the light emitting unit 2133. The control signal may be used to instruct the driving unit 2136 on the shading state of the light emitting unit 2133, so that the driving unit 2136 may control the shading state of the light emitting unit 2133 according to the control signal. Here, the light emitting unit 2133 may be driven by the driving unit 2136 in a case where the light emitting unit 2133 is in a bright state. Alternatively, in the case where the light emitting unit 2133 is in a bright state, the luminance of the light emitting unit 2133 is adjustable. In the case where the light emitting unit 2133 is in a dim state, the light emitting unit 2133 may be turned off by the driving unit 2136 (i.e., the light emitting unit 2133 may not be driven).

As shown in the partial enlarged view of the connector 2137 provided in fig. 5, in one example, the connector 2137 can include a plurality of connector ports P (also referred to as pins, pins). For example, the connector 2137 may include 30-100 connector ports P. Accordingly, the drive unit 2136 may include a plurality of signal input ports corresponding to the plurality of connector ports. The plurality of connector ports and the plurality of signal input ports may be electrically connected in a one-to-one, one-to-many, multi-correspondence, or the like. Depending on the functionality of the connector port P, the connector 2137 may include, for example, one or more electrical signal ports and one or more control signal ports. The electrical signal port may be used to transmit electrical signals. The control signal port may be used to transmit control signals. Accordingly, the drive unit 2136 may comprise, for example, one or more control signal input ports and one or more electrical signal input ports, depending on the function of the signal input port. The drive unit 2136 electrical signal input port may be electrically connected with an electrical signal port of the connector 2137. The drive unit 2136 control signal input port may be electrically connected with a control signal port of the connector 2137.

The driving unit 2136 may be used to drive each light emitting unit 2133 of the sub lamp panel 2130 and to control light emission of each light emitting unit 2133 of the sub lamp panel 2130. For example, the driving unit 2136 may turn off the light emitting unit 2133, control the luminance of the light emitting unit 2133, or the like. The driving unit 2136 may be, for example, an Integrated Circuit (IC) chip.

In one example, the control module 217 may include a controller and at least one power board, wherein the power board is configured to provide the electrical signal, the controller is configured to generate the control signal, wherein the control signal may be a PWM signal, and the driving unit 2136 may be a current source. Referring to fig. 6, the control module 217 may be connected with the connector 2137 through a connector 216 to transmit electric signals and control signals to the driving unit 2136 and the light emitting unit 2133. Based on the structures provided in fig. 3 to 6 described above, in fig. 7, an equivalent circuit of the connection relationship of the power board 2171, the controller 2172, the driving unit 2136, and the light emitting unit 2133 is provided. Wherein the power board 2171 is connected to the anode (+) of the light emitting unit 2133, the cathode (-) of the light emitting unit 2133 is connected to the ground GND through the driving unit 2136, and the driving unit 2136 is connected to the controller 2172; a controller 2172 configured to control the driving unit 2136 to supply a predetermined current to the light emitting unit 2133. For example, the controller 2172 controls the magnitude of a predetermined current using a Pulse Width Modulation (PWM) signal output to the driving unit 2136, thereby implementing PWM dimming. Specifically, the PWM dimming is to adjust the brightness by controlling the duty ratio of the PWM signal and adjusting the magnitude of the predetermined current supplied by the driving unit 2136 to the light emitting unit 2133, for example, when the duty ratio of the PWM signal is 100%, the driving unit 2136 supplies the maximum current to the light emitting unit 2133, and the light emitting unit 2133 operates at the maximum brightness. Meanwhile, the power board 2171 may also supply an electric signal to the driving unit 2136 in order to supply an operating voltage to the driving unit 2136.

In general, the peak brightness of each light emitting unit 2133 generally depends on the maximum power of the power board 2171. At present, the scheme of multi-partition backlight in the industry may be that the light emitting units 2133 of all light emitting areas of the whole lamp panel 213 are connected to the same power board 2171, and a high-power board supplies power to the light emitting units 2133 of all light emitting areas; referring to fig. 8, the connection relationship between the light emitting units 2133 and the power board 2171 is described as follows, taking the lamp panel 213 (or the sub-lamp board 2130) including 4 (rows) × 4 (columns) of the light emitting units 2133 as an example, and when the power board 2171 supplies power to all the light emitting units 2133, the connection manner of the power board 2171 to the anodes (+) of all the light emitting units 2133 and the connection manner of the cathodes (-) of the light emitting units 2133 is shown in fig. 7, and will not be described again. That is, the power board 2171 can supply power for light emission to all the light emitting units 2133. When an electronic device supports HDR authentication, it is desirable that the display of the product support high peak luminance of light emitting areas of any particular percentage (e.g., 1%,10%,20%,30%,40%, etc.). Specifically, referring to fig. 9, each small square in fig. 9 represents a light emitting unit, and the connection relationship between the power supply board 2171 and the light emitting units 2133 can be specifically referred to fig. 8, as shown in fig. 9 (a), when HDR is turned off, the total power supplied by the power supply board 2171 to all the light emitting units 2133 is 800W, and the brightness peak value of the full white field is 500nits. When HDR is turned on, the total power provided by the power board 2171 to all the light-emitting units 2133 is 800W, and when the controller determines from the image frame that a first region of the image frame (for example, the first region corresponds to a circle range (10% of any light-emitting region) as shown in fig. 9 (b)) needs to provide higher brightness, the light-emitting units corresponding to the circle range on the lamp panel may be controlled to output higher brightness, for example, the controller 2172 may control the current output by the driving unit 2136 to the light-emitting units in the circle range, so that the total power provided by the power board 2171 to the light-emitting units in the circle range is 640W, and thus the brightness peak value of the white field in the circle range (10% of any light-emitting region) in fig. 9 (b) is 4000nits; and the power supplied to the light emitting cells of the other 90% of the area is reduced so that the brightness of the light emitting cells of the other 90% of the area is reduced. Therefore, when a bright area and a dark area exist simultaneously in a display picture of the liquid crystal panel, the bright area (10% of any light-emitting area) is brighter in the light-emitting area corresponding to the backlight module, namely, high peak brightness is realized in the bright area, and the dark area (other 90% of area) is darker in the light-emitting area corresponding to the backlight module. Thereby achieving high peak brightness for any particular percentage of light emitting area in the display. However, the high-power panel needs to use the inductor, capacitor and other devices with larger electrical parameters, and the inductor, capacitor and other devices with larger electrical parameters are usually larger in volume, which is not favorable for thinning the product. Therefore, the industry also proposes a plurality of schemes of the low power supply boards, wherein the low power supply boards need to adopt devices such as inductors and capacitors with smaller electrical parameters, and the devices such as inductors and capacitors with smaller electrical parameters are usually smaller in volume, which is beneficial to the thinning of products. Meanwhile, the low-power panel is also favorable for multiplexing to supply power for other electric appliances in the electronic equipment. Each low-power panel correspondingly supplies power to the light-emitting units in one partition on the lamp panel, for example, one low-power supply supplies power to a plurality of sub-lamp panels on the lamp panel. Specifically, referring to fig. 10 and 11, the connection relationship between the light-emitting unit 2133 and the power board 2171 is described as follows, taking the lamp panel 213 (or the sub-lamp board 2130) including 4 (rows) × 4 (columns) of the light-emitting unit 2133 as an example, the power board 2171-1 supplies power to the light-emitting unit 2133 in the light-emitting area 1 on the upper side of the center line in the transverse direction of the lamp panel 213, and the power board 2171-1 connects the anode (+); the power board 2171-2 supplies power to the light emitting unit 2133 in the light emitting region 2 below the center line in the lateral direction of the lamp panel 213, and the power board 2171-2 is connected to the anode (+) of the light emitting unit 2133 in the light emitting region 2. The power board 2171-1 supplies power to the light emitting unit 2133 in the light emitting region 3 on the left side of the center line in the longitudinal direction of the lamp panel 213, and the power board 2171-1 is connected to the anode (+) of the light emitting unit 2133 in the light emitting region 3; the power board 2171-2 supplies power to the light emitting unit 2133 in the light emitting region 4 on the right side of the center line in the longitudinal direction of the lamp panel 213, and the power board 2171-2 is connected to the anode (+) of the light emitting unit 2133 in the light emitting region 2. Based on the connection manner of the power board and the lamp panel provided in fig. 10, as shown in fig. 12, each small square in fig. 12 may represent a light emitting unit, as shown in (a) in fig. 12, when HDR is turned off, the power board 2171-1 and the power board 2171-2 respectively supply power to the light emitting units in the light emitting areas to which they are respectively connected, the power board 2171-1 supplies the maximum power 400W to the light emitting units in the light emitting area 1 (upper side of the horizontal centerline), the power board 2171-2 supplies the maximum power 400W to the light emitting units in the light emitting area 2 (lower side of the horizontal centerline), the total power supplied by the power board 2171-1 and the power board 2171-2 is 800W, and the brightness peak value of the full white field is 500nits. When HDR is turned on, as shown in fig. 12 (b), the total power provided by the power supply board 2171-1 and the power supply board 2171-2 is 800W, since the lamp panel is divided into two light emitting areas by a transverse midline, the power supply board 2171-1 and the power supply board 2171-2 respectively supply power to the light emitting units in the upper and lower two light emitting areas, so that the peak brightness value of the white field in the circle range (10% of the light emitting areas divided by the midline) divided by the midline is 4000nits, and the total power provided by the power supply board 2171-1 and the power supply board 2171-2 to the light emitting units in the circle range 2133 is 640W; while the brightness decreases in the other 90% of the area. However, referring to fig. 13, when the circular range is not flattened by the horizontal middle line (for example, 10% of the light emitting area is located in the light emitting area 2), since the maximum power of the power board 2171-2 is 400W (400W < 640W), as the brightness peak of the white field in the circular range (10% of the light emitting area) in fig. 13 is much less than 4000nits, it is not able to support the high peak brightness of any specific percentage of the light emitting area in the display screen, i.e., it is not effective to make the bright area (10% of the light emitting area) brighter in the light emitting area corresponding to the backlight module, and the dark area (the other 90% of the light emitting area) darker in the light emitting area corresponding to the backlight module. Based on the connection manner of the power board and the lamp panel provided in fig. 11, as shown in fig. 14, each small square in fig. 14 may represent a light emitting unit, as shown in (a) in fig. 14, when HDR is turned off, the power board 2171-1 and the power board 2171-2 respectively supply power to the light emitting units in the light emitting areas connected to each other, the power board 2171-1 supplies the maximum power 400W to the light emitting units in the light emitting area 3 (left side of the vertical center line), the power board 2171-2 supplies the maximum power 400W to the light emitting units in the light emitting area 4 (right side of the vertical center line), the total power supplied by the power board 2171-1 and the power board 2171-2 is 800W, and the brightness peak value of the full white field is 500nits. When HDR is turned on, as shown in (b) of fig. 14, the total power provided by the power supply board 2171-1 and the power supply board 2171-2 is 800W, and since the longitudinal centerline divides the lamp panel into two light emitting areas, the power supply board 2171-1 and the power supply board 2171-2 respectively supply power to the light emitting units in the left and right two light emitting areas, the luminance peak value of the white field in the circular range (10% of the light emitting areas bisected by the centerline) bisected by the centerline is 4000nits, and the total power provided by the power supply board 2171-1 and the power supply board 2171-2 to the light emitting units 2133 in the circular range is 640W; while the brightness decreases in the other 90% of the area. However, referring to fig. 15, when the circle range is not flattened by the longitudinal middle line (for example, 10% of the light emitting area is located in the light emitting area 2), since the maximum power of the power board 2171-2 is 400W (400W < 640W), as the brightness peak value of the white field in the circle range (10% of the light emitting area) in fig. 15 is much less than 4000nits, it is not able to support the high peak brightness of any specific percentage of the light emitting area in the display screen, i.e., it is not effective to make the light area (10% of the light emitting area) brighter in the light emitting area corresponding to the backlight module, and the dark area (the other 90% of the light emitting area) darker in the light emitting area corresponding to the backlight module. Certainly, the above description mainly takes the case that two low-power supply boards respectively supply power to the light emitting units of two light emitting areas on the lamp panel, when more low-power supply boards are included, because the light emitting units on the lamp panel are divided into more light emitting areas, and meanwhile, the power supply of a single low-power supply board is lower, the requirement of supporting the high peak brightness of any specific percentage of the light emitting areas in the display screen cannot be met.

In order to solve the above problem, an electronic device provided in an embodiment of the present application and based on fig. 2 includes a first power board, a second power board, and light emitting units disposed on a lamp panel, where a unit area at any position on the lamp panel includes at least two light emitting units; the unit area is a regular area of any size at any position on the lamp panel, is not limited to a shape, and may be a circle or a polygon (e.g., a square, a diamond, a triangle, etc.); in some examples, it may be interpreted as a minimum area to be simultaneously supplied with power by the first power supply plate and the second power supply plate, for example, the unit area may include two light emitting cells. Therefore, as the light-emitting units powered by the first power supply board and the second power supply board exist in each unit area, the power of each power supply board can be output to the unit area, and therefore, in the display picture of the liquid crystal panel, when a bright area and a dark area exist simultaneously, the power of each power supply board can be output to one or more unit areas corresponding to the bright area on the lamp panel, so that the bright area is brighter, the dark area corresponding to the lamp panel is darker, and the high peak brightness of the light-emitting area with any specific percentage in the display picture can be supported.

In some examples, the area of the unit area is less than or equal to one tenth of the light emitting area of the lamp panel. Usually, the HDR certification defines a test window of 10% of the light emitting area of the lamp panel, and it is of course possible to perform HDR certification in a smaller or larger test window based on different HDR certification standard requirements, for example, the test window may be 1%,10%,20%,30%,40% of the display screen.

In addition, in order to ensure that each power supply board uniformly outputs power to the light emitting units in a unit area so that the brightness is uniform across the entire lamp panel, the number of light emitting units in the unit area, which are supplied with power from the power supply board 2171-1 and the power supply board 2171-2, is the same.

Considering the specific connection relationship of the plurality of power supply boards and the light emitting cells, in some examples, the unit area includes a plurality of sub-light emitting areas including one or more light emitting cells, the power supply board 2171-1 supplies power to the light emitting cells in at least one of the plurality of sub-light emitting areas, for example, a first light emitting cell of a first sub-light emitting area, and the power supply board 2171-2 supplies power to the light emitting cells in at least one other of the plurality of sub-light emitting areas, for example, a second light emitting cell of a second sub-light emitting area. In order to ensure uniform brightness in each unit area, the number of sub-light emitting areas to which the power supply board 2171-1 supplies power is the same as that of the power supply board 2171-2 in each unit area. Specifically, referring to fig. 16, a connection relationship between the power supply board and the light emitting unit will be described below, taking an example in which the electronic device includes two power supply boards 2171-1 and 2171-2 and the unit region includes 2 × 2 sub-light emitting regions. The unit region (light-emitting region 1) shown in fig. 16 specifically includes sub-light-emitting

regions

1, 2, 3, and 4 (in this case, x = 2) arranged in an array. As shown in fig. 16, each sub-light-emitting area includes a light-emitting unit 2133, so that a power board 2171-1 connects the light-emitting units in the sub-light-emitting area 1 and the sub-light-emitting area 2, and the power board 2171-2 connects the light-emitting units in the sub-light-emitting area 3 and the sub-light-emitting area 4. It should be noted that, although only one light emitting unit is exemplarily shown in fig. 16 for each sub-light emitting area, in some examples, each sub-light emitting area may also include a plurality of light emitting units, and of course, the plurality of light emitting units in the same sub-light emitting area may be connected in parallel or in series. Thus, as shown in fig. 16, when one light emitting unit is disposed in each sub-light emitting area, the light emitting units on the lamp panel may be grouped in a checkered manner, that is, when the current light emitting unit is connected to the power board 2171-1, the adjacent light emitting units (which may be adjacent to each other, or adjacent to each other, as shown in fig. 16) are connected to the power board 2171-2. In addition, the power supply board 2171-1 and the power supply board 2171-1 are connected to the plurality of sub-light emitting areas in the unit area in a predetermined order for the convenience of circuit design. The connection order of each sub-light emitting area in the unit area (light emitting area 2) as shown in fig. 16 to the power supply board 2171-1 and the power supply board 2171-2 is the same as in the light emitting area 1, simplifying the design of the circuit.

Based on the connection manner between the power panel and the lamp panel provided in fig. 16, as shown in fig. 17, each small square in fig. 17 may represent one light-emitting unit, and fig. 17 includes more light-emitting units than those in fig. 16, but the connection manner of each light-emitting unit is the same as that described in fig. 16. In connection with fig. 17 (a), when HDR is turned off, the power supply boards 2171-1 and 2171-2 respectively supply power to all the light emitting units connected to them, the power supply board 2171-1 supplies the maximum power 400W to the light emitting units connected to it, the power supply board 2171-2 supplies the maximum power 400W to the light emitting units connected to it, the power supply boards 2171-1 and 2171-2 supply the total power of 800W, and the brightness peak value of the full white field is 500nits. When HDR is turned on, in combination with fig. 17 (b), the total power provided by power supply board 2171-1 and power supply board 2171-2 is 800W, and since power supply board 2171-1 and power supply board 2171-2 can supply power to unit areas on the lamp panel at the same time, when the controller determines from the image frame that a first area of the image frame needs to provide higher brightness, for example, the first area corresponds to a circle range (10% of any light-emitting areas), and the circle range corresponds to one or more unit areas on the lamp panel; the corresponding light-emitting units on the lamp panel in the circular range can be controlled to output higher brightness, for example, the controller 2172 can control the current output by the driving unit 2136 to the light-emitting units in one or more unit areas in the circular range, so that the total power provided by the power board 2171-1 and the power board 2171-2 to the light-emitting units in the circular range is 640W, and thus the brightness peak value of the white field in the circular range is 4000nits, while the brightness of the other 90% areas is reduced. Therefore, when the bright area and the dark area exist simultaneously in the display picture of the liquid crystal panel, the bright area (for example, 10% of any light-emitting area) is brighter in the light-emitting area corresponding to the backlight module, and the dark area (other 90% of area) is darker in the light-emitting area corresponding to the backlight module, that is, the high peak brightness of any specific percentage of the light-emitting areas in the display picture can be supported.

In another example, the first power supply board is connected with the first n columns of light emitting units in the 2n columns of light emitting units which are continuously distributed, the second power supply board is connected with the last n columns of light emitting units in the 2n columns of light emitting units which are continuously distributed, and n is a positive integer greater than or equal to 1. In this scheme, the columns of light emitting units connected to the first power board and the columns of light emitting units connected to the second power board are distributed at intervals, and when the electronic device includes two power boards, n represents the number of the columns of light emitting units at intervals. Specifically, referring to fig. 18, a connection relationship between the power supply board and the light emitting unit is described as follows, in the case where the electronic device includes two power supply boards 2171-1 and 2171-2, when n =1, the power supply board 2171-1 connects the 1 st column light emitting unit in the first group and the 3 rd column light emitting unit in the second group in fig. 18, and the power supply board 2171-2 connects the 2 nd column light emitting unit in the first group and the 4 th column light emitting unit in the second group, that is, the column of the light emitting unit connected to the power supply board 2171-1 is spaced by 1 column from the column of the light emitting unit connected to the power supply board 2171-2. It should be noted that although only two columns of light emitting units are shown in fig. 18, it is understood that each group may also include more columns of light emitting units (as shown in fig. 19), for example, the first group may include 4 columns of light emitting units, the power board 2171-1 connects the 1 st and 2 nd columns of light emitting units, and the power board 2171-2 connects the 3 rd and 4 th columns of light emitting units, that is, 2 columns are spaced between the column of light emitting units connected to the power board 2171-1 and the column of light emitting units connected to the power board 2171-2. As another example, referring to fig. 20, a connection relationship between the power supply board and the light emitting unit is described below, and an electronic device includes two power supply boards 2171-1, 2171-2, and 2171-3 (in this case, n = 3), and m =1, that is, each group includes 3 consecutive rows of light emitting units. Thus, power strip 2171-1 connects the 1 st column of light emitting cells in the first group and the 4 th column of light emitting cells in the second group, power strip 2171-2 connects the 2 nd column of light emitting cells in the first group and the 5 th column of light emitting cells in the second group, and power strip 2171-3 connects the 3 rd column of light emitting cells in the first group and the 6 th column of light emitting cells in the second group. It should be noted that although each power board is connected to only one row of light emitting units in one group in fig. 18 and 20, it is understood that each group may also include more rows of light emitting units, such that each power board is connected to multiple rows of light emitting units in each group, for example, in fig. 19, the first group may include 4 rows of light emitting units, the power board 2171-1 is connected to the 1 st row and the 2 nd row of light emitting units, and the power board 2171-2 is connected to the 3 rd row and the 4 th row of light emitting units. In the light panels shown in fig. 18, 19, and 20, the n power supply boards can simultaneously supply power to the light emitting units in the unit area (light emitting area).

Based on the connection manner of the power panel and the lamp panel provided in fig. 18, as shown in fig. 21, each small square in fig. 21 may represent one light emitting unit, and fig. 21 includes more light emitting units than those in fig. 18, but the connection manner of each light emitting unit is the same as that described in fig. 18. In connection with fig. 21 (a), when HDR is turned off, the power supply boards 2171-1 and 2171-2 respectively supply power to all the light-emitting units connected thereto, the maximum power 400W supplied by the power supply board 2171-1 to the light-emitting units connected thereto, the maximum power 400W supplied by the power supply board 2171-2 to the light-emitting units connected thereto, the total power supplied by the power supply boards 2171-1 and 2171-2 is 800W, and the peak brightness value of the full white field is 500nits. When HDR is turned on, in combination with fig. 21 (b), the total power provided by power supply board 2171-1 and power supply board 2171-2 is 800W, and since power supply board 2171-1 and power supply board 2171-2 can supply power to unit areas on the lamp panel at the same time, when the controller determines from the image frame that a first area of the image frame needs to provide higher brightness, for example, the first area corresponds to a circle range (10% of any light-emitting areas), and the circle range corresponds to one or more unit areas on the lamp panel; the light emitting units in the corresponding unit area or unit areas on the lamp panel in the circular range can be controlled to output higher brightness, for example, the controller 2172 can control the current output by the driving unit 2136 to the light emitting units in the unit area or unit areas in the circular range, so that when the total power provided by the power board 2171-1 and the power board 2171-2 to the light emitting units in the circular range is 640W, the brightness peak value of the white field in the circular range is 4000nits, and the brightness of the other 90% area is reduced. Therefore, when the bright area and the dark area exist simultaneously in the display picture of the liquid crystal panel, the bright area (for example, 10% of any light-emitting area) is brighter in the light-emitting area corresponding to the backlight module, and the dark area (other 90% of area) is darker in the light-emitting area corresponding to the backlight module, that is, the high peak brightness of any specific percentage of the light-emitting areas in the display picture can be supported.

In another example, the first power supply board is connected with the first n rows of light emitting units in the 2n rows of light emitting units which are continuously distributed, the second power supply board is connected with the last n rows of light emitting units in the 2n rows of light emitting units which are continuously distributed, and n is a positive integer greater than or equal to 1. In this scheme, the rows of light emitting cells connected to the first power board are spaced apart from the rows of light emitting cells connected to the second power board, and when the electronic device includes two power boards, n represents the number of rows of spaced light emitting cells. Specifically, referring to fig. 22, the connection relationship between the power supply board and the light emitting units is described as follows, in the case that the electronic device includes two power supply boards 2171-1 and 2171-2, when n =1, the power supply board 2171-1 connects the 1 st row of light emitting units in the first group and the 3 rd row of light emitting units in the second group, and the power supply board 2171-2 connects the 2 nd row of light emitting units in the first group and the 4 th row of light emitting units in the second group, that is, the row of light emitting units connected to the power supply board 2171-1 is spaced by 1 row from the row of light emitting units connected to the power supply board 2171-2. It should be noted that although only two rows of light emitting units are shown in fig. 22, it is understood that each group may also include more rows of light emitting units, for example, the first group may include 4 rows of light emitting units, the power board 2171-1 connects the 1 st and 2 nd rows of light emitting units, the power board 2171-2 connects the 3 rd and 4 th rows of light emitting units, that is, the row of light emitting units connected to the power board 2171-1 is spaced by 2 rows from the row of light emitting units connected to the power board 2171-2. It should be noted that although fig. 22 is described above with each power strip connected to only one row of light-emitting units in one group, it is understood that each group may also include more rows of light-emitting units, such that each power strip is connected to multiple rows of light-emitting units in each group, for example, the first group may include 4 rows of light-emitting units, power strip 2171-1 is connected to the 1 st and 2 nd rows of light-emitting units, and power strip 2171-2 is connected to the 3 rd and 4 th rows of light-emitting units. In the light panel shown in fig. 22, n power supply boards can simultaneously supply power to the light-emitting units in the unit area (light-emitting area).

Based on the connection manner of the power panel and the lamp panel provided in fig. 22, as shown in fig. 23, each small square in fig. 23 may represent one light emitting unit, and fig. 23 includes more light emitting units than those in fig. 22, but the connection manner of each light emitting unit is the same as that described in fig. 22. In connection with fig. 23 (a), when HDR is turned off, the power supply boards 2171-1 and 2171-2 respectively supply power to all the light emitting units connected to them, the power supply board 2171-1 supplies the maximum power 400W to the light emitting units connected to it, the power supply board 2171-2 supplies the maximum power 400W to the light emitting units connected to it, the power supply boards 2171-1 and 2171-2 supply the total power of 800W, and the brightness peak value of the full white field is 500nits. When HDR is turned on, in combination with fig. 23 (b), the total power provided by power supply board 2171-1 and power supply board 2171-2 is 800W, and since power supply board 2171-1 and power supply board 2171-2 can supply power to unit areas on the lamp panel at the same time, when the controller determines from the image frame that a first area of the image frame needs to provide higher brightness, for example, the first area corresponds to a circle range (10% of any light-emitting areas), and the circle range corresponds to one or more unit areas on the lamp panel; the light emitting units in the corresponding unit area or unit areas on the lamp panel in the circular range can be controlled to output higher brightness, for example, the controller 2172 can control the current output by the driving unit 2136 to the light emitting units in the unit area or unit areas in the circular range, so that when the total power provided by the power board 2171-1 and the power board 2171-2 to the light emitting units in the circular range is 640W, the brightness peak value of the white field in the circular range is 4000nits, and the brightness of the other 90% area is reduced. Therefore, in the display picture of the liquid crystal panel, when the bright area and the dark area exist simultaneously, the bright area (for example, 10% of any light-emitting area) is brighter in the light-emitting area corresponding to the lamp panel, and the dark area (other 90% of area) is darker in the light-emitting area corresponding to the lamp panel, that is, the high peak brightness of any specific percentage of light-emitting areas in the display picture can be supported.

The specific implementation manner of the electronic device is mainly given above by taking two power panels as an example, in some examples, the electronic device may further include more power panels, for example, three power panels (see fig. 20), and of course, four power panels (see fig. 24) or more power panels. Referring to fig. 24, the connection relationship between the power supply board and the light-emitting unit will be described below, taking an example in which the electronic device includes four power supply boards 2171-1, 2171-2, 2171-3, and 2171-4, and the unit region (light-emitting region) includes 2 × 2 sub-light-emitting regions. The light-emitting region in fig. 24 specifically includes sub-light-emitting

regions

1, 2, 3, and 4 arranged in an array. Here, as shown in fig. 24, each sub-light-emitting area includes one light-emitting unit 2133, so that a power supply board 2171-1 connects the light-emitting units in the sub-light-emitting area 1, a power supply board 2171-2 connects the light-emitting units in the sub-light-emitting area 2, a power supply board 2171-3 connects the light-emitting units in the sub-light-emitting area 3, and a power supply board 2171-4 connects the light-emitting units in the sub-light-emitting area 4. It should be noted that, although only one light emitting unit is exemplarily shown in fig. 24 for each sub-light emitting region, in some examples, each sub-light emitting region may also include a plurality of light emitting units, and of course, the plurality of light emitting units in the same sub-light emitting region may be connected in parallel or in series. In this embodiment, the connection sequence of the sub-light-emitting areas and the power supply board in each light-emitting area is not limited, and of course, in order to improve the uniformity of light emission, the connection sequence of the sub-light-emitting areas and the power supply board in each light-emitting area may be the same.

Thus, based on the above electronic device, when it is required to display an image (the moon in the dark, the image area of "moon" is a bright area, and the other areas are dark areas) as shown in fig. 25 on the screen assembly, the specific processing steps are as follows: the electronic device first processes a data frame containing the image, determines the brightness of each pixel of the image, and when a first region of the image frame needs to provide higher brightness (for example, the brightness of the first region is greater than that of other regions), the electronic device identifies the first region as a bright region and the other regions as dark regions, where the brightness of the first region may be an average value of the brightness of all pixels in the region, so that the electronic device controls the light-emitting units of the region where the "circle" on the lamp panel shown in fig. 26 corresponds to the image region where the "moon" in the bright region to have higher brightness, and the light-emitting units of the other regions have lower brightness, thereby improving the HDR effect of the image. Specifically, as shown in fig. 7, the duty ratio of the PWM signal of the driving unit 2136 connected to the light emitting unit in the area where the "circle" on the lamp panel is located may be increased, and the duty ratio of the PWM signal of the driving unit 2136 connected to the light emitting units in other areas may be decreased. Therefore, when the lamp panel provides the backlight scheme, the brightness provided by the light emitting area corresponding to the lamp panel in the image area of the moon can be brighter, and the brightness provided by the light emitting area corresponding to the lamp panel in other areas is darker, so that the HDR of the image can be improved, and a user has a better viewing effect. In the scheme provided in the embodiment of the application, the lighting units powered by all the multiple power supply boards exist in one or more unit areas in each test window smaller than or equal to the HDR certification of the electronic device, so that the power of each power supply board can be output to the unit area, and thus, in a display picture of the liquid crystal panel, when a bright area and a dark area exist simultaneously, the bright area is brighter in one or more unit areas corresponding to the lamp panel, and the dark area (other areas) is darker in one or more unit areas corresponding to the lamp panel, so that high peak brightness of any specific percentage of lighting areas in the display picture can be supported. In this way, the liquid crystal panel can make the image area of the "moon" brighter when displaying the image in fig. 25, so that the user can observe the brighter moon.

While the present application has been described in connection with various embodiments, other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed application, from a review of the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the word "a" or "an" does not exclude a plurality. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.

Having described embodiments of the present application, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. An electronic device is characterized by comprising a backlight module and a liquid crystal panel; the backlight module comprises a back plate, a leveling plate, a lamp plate and a diffusion plate; the lamp panel is positioned between the leveling plate and the diffusion plate; the electronic device further includes: the lamp comprises a first power panel, a second power panel and light-emitting units arranged on a lamp panel, wherein a unit area at any position on the lamp panel at least comprises two light-emitting units;

the first power panel is connected with a first light-emitting unit in the unit area on the lamp panel, and the second power panel is connected with a second light-emitting unit in the unit area on the lamp panel.

2. The electronic device according to claim 1, wherein the first power board is connected to first n columns of the continuously distributed 2n columns of light-emitting units, the second power board is connected to last n columns of the continuously distributed 2n columns of light-emitting units, and n is a positive integer greater than or equal to 1.

3. The electronic device of claim 1, wherein the first power board is connected to the first n rows of the continuously distributed 2n rows of light-emitting units, the second power board is connected to the last n rows of the continuously distributed 2n rows of light-emitting units, and n is a positive integer greater than or equal to 1.

4. The electronic device according to claim 1, wherein the unit region includes a plurality of sub-light-emitting regions including one or more light-emitting units; the first power supply board supplies power to the light emitting units in a first sub-light emitting area of the plurality of sub-light emitting areas, and the second power supply board supplies power to the light emitting units in a second sub-light emitting area of the plurality of sub-light emitting areas.

5. The electronic device according to claim 4, wherein the unit region includes a first sub-light-emitting region including the first light-emitting unit and a second sub-light-emitting region including the second light-emitting unit;

the first power supply board is connected with the first light-emitting unit in the first sub light-emitting area; the second power supply board is connected with the second light emitting unit in the second sub-light emitting area.

6. The electronic device of claim 4,

the number of the sub-light emitting areas supplied with power from the first power supply board in the unit area is the same as the number of the sub-light emitting areas supplied with power from the second power supply board.

7. The electronic device according to claim 4, wherein the first power supply board and the second power supply board are connected to the plurality of sub-light emitting areas in the unit area in a predetermined order.

8. The electronic device according to any one of claims 1 to 7, wherein the number of the light-emitting units supplied with power from the first power supply board is the same as the number of the light-emitting units supplied with power from the second power supply board in the unit area.

9. The electronic device according to any one of claims 1 to 7, wherein the power supply board is connected to an anode of a light emitting unit, a cathode of the light emitting unit is connected to GND through a driving unit, and the driving unit is connected to the controller;

the controller is configured to control the driving unit to supply a predetermined current to the light emitting unit.

10. The electronic device of any of claims 1-7, wherein the light-emitting unit comprises one or more series-connected light-emitting diodes (LEDs).