WO2023051047A1 - Electronic device - Google Patents

Abstract

An electronic device (100), relating to the technical field of display, and capable of supporting high peak brightness of any specific percentage of light-emitting areas in a display screen. The electronic device (100) comprises a backlight module (210) and a liquid crystal panel (220); the backlight module (210) comprises a back plate (211), a flat plate (212), a lamp panel (213), and a diffuser plate (214); the flat plate (212) is located between the back plate (211) and the lamp panel (213), and the lamp panel (213) is located between the flat plate (212) and the diffuser plate (214); the electronic device (100) further comprises a first power supply board (2171-1), a second power supply board (2171-2), and light-emitting units (2133) arranged on the lamp panel (213), and a unit area (a light-emitting area 1) at any position on the lamp panel (213) at least comprises two light-emitting units (2133); the first power supply board (2171-1) is connected to first light-emitting units (2133) in a unit area (the light-emitting area 1) on the lamp panel (213), and the second power supply board (2171-2) is connected to second light-emitting units (2133) in a unit area (the light-emitting area 1) on the lamp panel (213).

Description

Electronic equipment

This application claims the priority of a Chinese patent application with application number 202111166927.9 and application title "Electronic Equipment" filed with the State Intellectual Property Office on September 30, 2021, the entire contents of which are incorporated herein by reference.

technical field

The embodiments of the present application relate to the field of display technology, and in particular, to an electronic device.

Background technique

At present, in order to improve the contrast of the LCD panel display in the large-screen industry, the scheme of the backlight module has been improved from global light control to zone dimming. In this way, in the display screen of the liquid crystal panel, when the bright area and the dark area exist at the same time, the bright area is brighter in the light-emitting area corresponding to the backlight module, and the dark area is darker in the light-emitting area corresponding to the backlight module. It is also possible to only light up individual light-emitting areas and turn off other light-emitting areas, so as to achieve the purpose of reducing power consumption.

However, on some high-end products, high-dynamic range image (high-dynamic range, HDR) certification is generally passed to enhance the competitiveness of high-end products. To pass the HDR certification, it is necessary for the product to support the test window of the display screen to be any specific percentage of the luminous area (for example, the area of the test window can be 1%, 10%, 20%, 30%, 40% of the luminous area of the display screen, etc. area) of high peak brightness. At present, the multi-partition backlight solutions in the industry include: the light-emitting units of all the light-emitting areas of the entire backlight module are connected to the same power board, and a high-power power board supplies power to all the light-emitting areas; or, the entire backlight module is divided into multiple light-emitting areas. , each light-emitting area in the plurality of light-emitting areas is powered by a low-power power supply board. The solution using a low-power power board can generally only provide relatively low power to the corresponding light-emitting area, and cannot support the high peak brightness of a specific percentage (for example, 10%) of the light-emitting area in the display screen stipulated by HDR certification.

Contents of the invention

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

In a first aspect, an electronic device is provided. The electronic device includes a backlight module and a liquid crystal panel, for example, the liquid crystal panel is arranged on the light emitting side of the backlight module. The backlight module includes a backplane, a flat board, a lamp board, and a diffusion board; wherein, the flat board is located between the back board and the lamp board, and the lamp board is located between the flat board and the diffusion board. The electronic equipment also includes: a first power board, a second power board, and a light emitting unit arranged on the lamp board. A unit area at any position on the lamp board includes at least two light emitting units; the first power board and the light emitting unit on the lamp board The first light emitting unit in the unit area is connected, and the second power supply board is connected with the second light emitting unit in the unit area on the light board. It should be noted that the unit area is a regular area of any size at any position on the light board, and the shape is not limited, for example, it can be a circle, or a polygon (such as a square, a rhombus, a triangle, etc.); in some examples , can be interpreted as the smallest area that is simultaneously powered by the first power board and the second power board, for example, the unit area can include two light emitting units. In this way, since there are light-emitting units powered by the first power supply board and the second power supply board in each unit area, the power of each power supply board can be output to the unit area, so that the display screen of the liquid crystal panel can In the above, when the bright area and the dark area exist at the same time, the power of each power board can be output to one or more unit areas corresponding to the bright area on the light board, so that the bright area is brighter, and the dark area is on the corresponding unit area of the light board. The light-emitting area is darker, enabling high peak brightness for any given percentage of the light-emitting area in the display.

In a possible implementation, the first power supply board is connected to the first n columns of light-emitting units in the 2n columns of light-emitting units that are continuously distributed, and the second power supply board is connected to the last n columns of light-emitting units in the 2n columns of light-emitting units that are continuously distributed. is a positive integer greater than or equal to 1. It should be noted that, in this scheme, the columns of the light emitting units connected to the first power supply board and the column intervals of the light emitting units connected to the second power supply board are distributed, for example, in any group of continuous 2n columns of light emitting units on the light board, The first power supply board is connected to the first n columns of light emitting units, and the second power supply board is connected to the rear n columns of light emitting units. Specifically, for example, in a group of continuous two columns of light emitting units, the first power supply board is connected to the first row of light emitting units. The second power board is connected to the 2nd row of light-emitting units; and for example, in a group of continuous 4-row light-emitting units, the first power board is connected to the 1st row and the 2nd row of light-emitting units, and the second power board is connected to the 3rd row and the 2nd row of light-emitting units. The 4th row of light-emitting units is connected.

In a possible implementation manner, the first power board is connected to the first n rows of light-emitting units in the continuously distributed 2n rows of light-emitting units, and the second power board is connected to the last n rows of light-emitting units in the continuously distributed 2n rows of light-emitting units , n is a positive integer greater than or equal to 1. It should be noted that, in this scheme, the rows of the light emitting units connected to the first power supply board are distributed with the row intervals of the light emitting units connected to the second power supply board, for example, in any group of continuous 2n rows of light emitting units on the light board, The first power supply board is connected to the first n rows of light emitting units, and the second power supply board is connected to the rear n rows of light emitting units. Specifically, for example, in a group of continuous 2 rows of light emitting units, the first power supply board is connected to the first row of light emitting units. The second power supply board is connected to the light-emitting units in the second row; for example, in a group of continuous 4-row light-emitting units, the first power supply board is connected to the light-emitting units in the first row and the second row, and the second power supply board is connected to the third row and the second row of light-emitting units. Line 4 is connected to the light-emitting unit.

In a possible implementation manner, the unit area includes a plurality of sub-light-emitting areas, the sub-light-emitting areas include one or more light-emitting units, and the first power board supplies power to the light-emitting units in at least one of the multiple sub-light-emitting areas, For example, power is supplied to the first sub-light emitting area, and the second power supply board is used to supply power to the light-emitting units in at least one other sub-light-emitting area of the plurality of sub-light-emitting areas, for example, to supply power to the second sub-light-emitting area. In a specific example, the unit area includes a first sub-light-emitting area and a second sub-light-emitting area, the first sub-light-emitting area includes a first light-emitting unit, and the second sub-light-emitting area includes a second self-luminous unit; the first power board The first light emitting unit in the first sub-light emitting area is connected; the second power board is connected with the second light emitting unit in the second sub light emitting area.

In a possible implementation manner, in order to ensure uniform brightness in each unit area, the number of sub-light-emitting areas powered by the first power board in the unit area is different from the number of sub-light-emitting areas powered by the second power board. same amount.

In a possible implementation manner, in order to facilitate circuit design, the first power supply board and the second power supply board are connected to the multiple sub-light emitting regions in the unit area in a predetermined order. In this way, in each unit area, the first power supply board and the second power supply board are connected to the multiple sub-light-emitting areas in the same order, which simplifies the circuit design.

In a possible implementation manner, the number of light emitting units powered by the first power supply board in a unit area is the same as the number of light emitting units powered by the second power supply board. This ensures uniform brightness within each unit area.

In a possible implementation, the power board is connected to 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 to the controller; the controller is configured to control the driving unit to provide a predetermined current to the light emitting unit . For example, the controller uses a pulse width modulation (Pulse Width Modulation, PWM) signal output to the drive unit to control the magnitude of the predetermined current, thereby realizing PWM dimming. Specifically, PWM dimming is to adjust the size of the predetermined current provided by the drive unit to the light-emitting unit by controlling the duty cycle of the PWM signal, so as to realize the adjustment of brightness. For example, when the duty cycle of the PWM signal is 100%, the drive unit sends The light-emitting unit provides the maximum current, and at this moment, the light-emitting unit works with maximum brightness.

In a possible implementation manner, the light emitting unit includes one or more light emitting diodes (LEDs) connected in series.

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

In a possible implementation manner, 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 test window specified in HDR certification is 10% of the light-emitting area of the light panel. Of course, based on different HDR certification standards, HDR certification may also be performed in a smaller or larger test window. For example, the test window can be the display screen. 1%, 10%, 20%, 30%, 40%, etc.

Description of drawings

FIG. 1 is a schematic diagram of the overall structure of an electronic device provided by an embodiment of the present application;

Fig. 2 is a schematic diagram of an exploded structure of a screen assembly provided by an embodiment of the present application;

Fig. 3 is a schematic structural diagram of a seed lamp panel provided by an embodiment of the present application;

Fig. 4 is a schematic structural diagram of a seed lamp panel provided by 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 of a connection structure between a control module and a connector provided by an embodiment of the present application;

FIG. 7 is a schematic structural diagram of a driving circuit of a light emitting unit provided by an embodiment of the present application;

Fig. 8 is a schematic diagram of the connection structure between the power board and the light emitting unit provided by the embodiment of the present application;

FIG. 9 is a schematic diagram of the distribution structure of the light emitting units provided by the embodiment of the present application;

Fig. 10 is a schematic diagram of the connection structure between the power board and the light emitting unit provided by another embodiment of the present application;

Fig. 11 is a schematic diagram of the connection structure between the power board and the light emitting unit provided by another embodiment of the present application;

Fig. 12 is a schematic diagram of the distribution structure of light emitting units provided by another embodiment of the present application;

Fig. 13 is a schematic diagram of the distribution structure of light emitting units provided by another embodiment of the present application;

Fig. 14 is a schematic diagram of the distribution structure of light emitting units provided by another embodiment of the present application;

Fig. 15 is a schematic diagram of the distribution structure of light emitting units provided by another embodiment of the present application;

Fig. 16 is a schematic diagram of the connection structure between the power board and the light emitting unit provided by another embodiment of the present application;

Fig. 17 is a schematic diagram of the distribution structure of light emitting units provided by another embodiment of the present application;

Fig. 18 is a schematic diagram of the connection structure between the power board and the light emitting unit provided by another embodiment of the present application;

Fig. 19 is a schematic diagram of the connection structure between the power board and the light emitting unit provided by another embodiment of the present application;

Fig. 20 is a schematic diagram of the connection structure between the power board and the light emitting unit provided by another embodiment of the present application;

Fig. 21 is a schematic diagram of the distribution structure of light emitting units provided by another embodiment of the present application;

Fig. 22 is a schematic diagram of the connection structure between the power board and the light emitting unit provided by another embodiment of the present application;

Fig. 23 is a schematic diagram of the distribution structure of light emitting units provided by another embodiment of the present application;

Fig. 24 is a schematic diagram of the connection structure between the power board and the light emitting unit provided by another embodiment of the present application;

Fig. 25 is a schematic diagram of an image screen provided by an embodiment of the present application;

Fig. 26 is a schematic diagram of the distribution structure of the light emitting units provided by another embodiment of the present application.

Detailed ways

The technical solutions in some embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are only some of the embodiments of the present application, not all of them. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments provided in this application belong to the scope of protection of this application.

Throughout the specification and claims, unless the context requires otherwise, the term "comprise" and other forms such as the third person singular "comprises" and the present participle "comprising" are used Interpreted as the meaning of openness and inclusion, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific examples" example)" or "some examples (some examples)" etc. are intended to indicate that specific features, structures, materials or characteristics related to the embodiment or examples are included in at least one embodiment or example of the present application. 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.

Hereinafter, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the embodiments of the present application, unless otherwise specified, "plurality" means two or more. Additionally, the use of "based on" is meant to be 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 beyond stated values.

In the description of this application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", The orientations or positional relationships indicated by "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the application and simplifying the description, rather than indicating or implying References to devices or elements must have a particular orientation, be constructed, and operate in a particular orientation and therefore should not be construed as limiting the application. In the description of the present application, unless otherwise specified, "plurality" means two or more.

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

FIG. 1 is a schematic structural diagram of an electronic device 100 provided by an embodiment of the present application. The electronic device 100 may be a large-screen electronic device such as an advertising screen (billboard), a display, a TV (such as a smart screen), a notebook computer, a tablet computer, or a vehicle-mounted device. Optionally, in some scenarios, the electronic device 100 may be a device such as a mobile phone, an e-reader, or a wearable device. The embodiment shown in FIG. 1 is described by taking the electronic device 100 being a television as an example.

The electronic device 100 may include a case 110 and a screen assembly 200 .

The case 110 may include a bezel and a rear cover. The frame can surround the periphery of the back cover. The casing 110 may include, for example, a middle frame of the electronic device 100 . In an example, the middle frame of the electronic device 100 can be accommodated in the inner periphery of the frame. In another example, the middle frame of the electronic device 100 may serve as a frame of the casing 110 . The screen assembly 200 may be an assembly providing a display function for the electronic device 100 . Users can watch the screen assembly 200 to enjoy media resources such as images and videos. The screen assembly 200 may be installed on the case 110 . The peripheral edge of the screen assembly 200 may abut against the inner edge of the frame. The frame can fix the screen assembly 200 on the casing 110 . The screen assembly 200 and the back cover can be installed on both sides of the frame respectively, so that the housing 110 can provide mechanical protection for the components inside the electronic device, especially the components on the screen assembly 200 . The screen assembly 200 can be fixed on the middle 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. For example, a control module can be configured on the screen assembly 200 , and the control module can be accommodated in the casing 110 . In one example, the control module may include at least one communication interface, a bus, at least one processor, and at least one memory. At least one communication interface, at least one processor and at least one memory can communicate with each other through the bus. At least one communication interface can be used to receive and transmit signals. For example, the light emitting unit of the screen assembly 200 can be connected to one of the communication interfaces, so that the control module can trigger the light emitting unit to emit light. At least one memory is used to store application code. The application program code may include, for example, code to control the lighting unit to emit light or not to emit light. At least one processor can be used to execute the above application program codes to realize the control of the light emitting unit. In the present application, "at least one" includes, for example, one or more of the two cases.

The screen assembly 200 provided by the embodiment of the present application will be described below with reference to FIG. 2 . FIG. 2 is an exploded view of the screen assembly 200 . The screen assembly 200 shown in FIG. 2 includes a backlight module 210 and a liquid crystal panel 220 disposed on the light emitting side of the backlight module 210 . The backlight module 210 may include stacked components such as a backplane 211 , a flattening plate 212 , a lamp plate 213 , a diffusion plate 214 , and an optical film 215 . Of course, the general structure of the backlight module 210 is merely provided in FIG. 2 as an example, and in some examples, the backlight module 210 may further include more or less components than those described above.

The backplane 211 may have functions such as supporting the electronic device 100 and providing mechanical protection for electronic components in the electronic device 100 . The material of the back plate 211 may be a material that meets the requirements of mechanical strength and can play a supporting role. For example, the back plate 211 may be made of metal materials such as stainless steel, aluminum alloy, zinc alloy, titanium alloy and the like. In another example, the back plate 211 may be made of non-metallic materials such as resin. The back panel 211 may include a first back panel end surface and a second back panel end surface, the first back panel end surface is close to the lamp panel 213 , and the second back panel end surface is away from the lamp panel 213 . For the user, the first backplane end surface may correspond to the front of the electronic device 100 , and the second backplane end surface may correspond to the back of the electronic device 100 . The front of the electronic device 100 may be a side of the electronic device 100 that is often observed when the user uses the electronic device 100 . The back of the electronic device 100 may be disposed opposite to 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 observed when the user uses the electronic device 100 . For example, the electronic device 100 may be a TV, and the side of the TV on which the screen assembly is installed may be the front of the TV; the side of the TV on which the rear cover is installed may be the back of the TV. The first backplane end surface corresponds to the front of the electronic device 100 , which means that the first backplane end surface can be observed when the user observes the backplane 211 along the direction in which the user observes the front of the electronic device 100 . The second backplane end surface corresponds to the back surface of the electronic device 100 , which means that the second backplane end surface can be observed when the user observes the backplane 211 along the direction in which the user observes the back surface of the electronic device 100 . For ease of description, the first end surface of the backplane may be referred to as the front of the backplane 211 , and the second end surface of the backplane may be referred to as the backside of the backplane 211 . In a possible example, the end surface of the first backplane may be fixed on the back cover of the housing 110 . For example, the end surface of the first backboard can be fixed on the rear cover of the housing 110 through mechanical connectors such as screws, double-sided tape, foam and the like. In other possible examples, the back plate 211 may serve as a rear cover of the housing 110 .

The flat board 212 may be located between the light board 213 and the back board 211 . The flat plate 212 can be used to provide support for the lamp panel 213 to maintain or ensure the flatness of the lamp panel 213 . The flat plate 212 may be a conductive material with a certain rigidity. For example, the flat plate 212 may be an aluminum plate. The flat plate 212 can be fixed on the back plate 211 through mechanical connectors such as double-sided tape and foam, for example. In a possible scenario, when the electronic device 100 is being transported, the electronic device 100 may be bumped, dropped or the like. In this case, the electronic device 100 can withstand a certain degree of external force. The back plate 211 can be deformed accordingly to resist the external force. If the lamp board 213 is directly fixed on the back board 211 , the lamp board 213 may follow the back board 211 to undergo relatively obvious deformation. In order to avoid the occurrence of the above situation, the transportation difficulty of the electronic device 100 will be increased. If the back panel 211 is relatively obviously deformed, it is not conducive to the display effect of the lamp panel 213 . For example, due to the different light mixing distances in different areas of the lamp panel 213 , display problems such as uneven brightness and darkness, ghost images, etc. may occur in the electronic device 100 . The flat plate 212 is arranged between the back plate 211 and the lamp plate 213 , so that the flat plate 212 can play a transitional role between the light plate 213 and the back plate 211 in terms of deformation. The deformation amount of the flat plate 212 may be smaller than that of the back plate 211, and thus the deformation amount of the lamp board 213 may tend to decrease. That is to say, in the case that the back plate 211 is relatively obviously deformed, the deformation amount of the lamp plate 213 can be relatively small or relatively inconspicuous as possible.

The optical film 215 can change the frequency of the light from the light panel 213 . The optical film 215 may include quantum dots. For example, the lamp board 213 can emit high-energy blue light; the blue light can excite the quantum dots encapsulated in the optical film 215, so that the quantum dots can convert the blue light emitted by the lamp board 213 into white light (the quantum dot can be a nanoscale Semiconductor; by applying a certain electric field or light pressure to the quantum dots, the quantum dots can emit light of a specific frequency). Quantum dots can be formed, for example, on chemical coatings and phosphors. In one possible example, the 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 in the liquid crystal layer can control the liquid crystal unit to be turned on or off, so as to control the light intensity of the white light passing through the liquid crystal unit. By turning on the liquid crystal unit, the white light passing through the liquid crystal unit can be irradiated on the filter layer. The filter layer may include a red light filter, a green light filter, and a blue light filter. A red light filter can be used to convert white light to red light. Green light filters can be used to convert white light to green light. Blue light filters can be used to convert white light to blue light. Thus, the electronic device 100 can be controlled to emit light of various colors to display color patterns.

In other examples, the diffuser plate 214 may include quantum dots, so that the diffuser plate 214 may change the frequency of the light from the light panel 213 . In some embodiments, the diffusion plate 214 and the optical film 215 can be integrally formed. The light emitted by the light board 213 may only undergo light mixing processing without other optical processing, and directly enter the diffuser plate 214 . That is to say, in some possible scenarios, quantum dots may not be arranged on the light emitting units of the light board 213 . This helps to reduce the structural complexity of the lamp board 213 , and facilitates that the light emitting units can be relatively closely arranged on the lamp board 213 . For example, the size of the phosphor powder is generally larger than the size of the light emitting units of the lamp board 213 , and packaging the phosphor powder on the lamp board 213 is not conducive to the compact arrangement of the light emitting units.

In some examples, the light board 213 may also include a plurality of sub-light boards 2130 distributed in an array. In the following, a sub-lamp board 2130 is taken as an example for description. The sub-lamp board 2130 may include a first lamp board end surface 2131 and a second lamp board end surface 2132 . Fig. 3 is a schematic structural diagram of a first lamp panel end surface 2131 of a seed lamp panel 2130 provided in an embodiment of the present application. The light emitted by the sub-lamp board 2130 can be emitted from the first lamp-board end surface 2131 of the sub-lamp board 2130 . The first lamp panel end surface 2131 of the sub-lamp panel 2130 may be a surface of the sub-lamp panel 2130 that is close to the diffuser plate 214 and away from the back panel 211 . The structure of the first lamp panel end surface 2131 of the sub-lamp panel 2130 will be described below with reference to FIG. 3 . The sub lamp board 2130 may include a plurality of light emitting units 2133 . For example, the sub-light panel 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 with a light emitting function. The light emitting unit 2133 can also be a light emitting diode (LED). FIG. 4 is a schematic structural diagram of a second lamp panel end surface 2132 of a sub-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 away from the diffuser panel 214 . The structure of the second lamp panel end surface 2132 of the sub-lamp panel 2130 will be described below with reference to FIG. 4 . The second lamp board end surface 2132 of the sub-lamp board 2130 can be provided with double-sided adhesive, and the double-sided adhesive can be fixedly connected to the sub-lamp board 2130 and the flat board 212 . In a possible example, the double-sided adhesive may be thermally conductive adhesive 2134 . Since the sub-lamp board 2130 may generate relatively high heat during operation, the thermally conductive adhesive 2134 is beneficial to transfer the heat of the sub-lamp board 2130 to the flat plate 212 , which is beneficial to improving the heat dissipation of the electronic device 100 .

The second lamp board end surface 2132 of the sub-lamp board 2130 may also be provided with a conductive elastic piece 2135 . One end of the conductive elastic piece 2135 can be electrically connected to the sub-lamp board 2130 . The other end of the conductive elastic piece 2135 can abut against the flat plate 212 . When the sub-lamp board 2130 is working, the light emitting unit 2133 of the sub-lamp board 2130 may accumulate charges. The sub-lamp board 2130 can be grounded through the conductive shrapnel 2135 , which is beneficial to improve the electromagnetic compatibility (electromagnetic compatibility, EMC) of the electronic device 100 .

The sub-light board 2130 may also include one or more driving units 2136 (also referred to as drivers or driving circuits), and one or more connectors 2137 . Through the connector 2137 , signals related to the sub-lamp board 2130 may be input to the driving unit 2136 . In one example, the signal input from the connector 2137 to the signal driving unit 2136 may include electrical signals and control signals. The electrical signal can be used to provide driving power for the driving unit 2136 and the light emitting unit 2133 . The control signal can be used to indicate the light and dark state of the light emitting unit 2133 to the driving unit 2136, so that the driving unit 2136 can control the light and dark state of the light emitting unit 2133 according to the control signal. Wherein, when the light emitting unit 2133 is in a bright state, the light emitting unit 2133 can be driven by the driving unit 2136 . Optionally, when the light emitting unit 2133 is in a bright state, the brightness of the light emitting unit 2133 can be adjusted. In the case that the light emitting unit 2133 is in a dim state, the light emitting unit 2133 may be turned off by the driving unit 2136 (ie, 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 may 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. FIG. Correspondingly, the driving unit 2136 may include a plurality of signal input ports corresponding to a plurality of connector ports. A plurality of connector ports and a plurality of signal input ports can be electrically connected through one-to-one, one-to-many, and many-to-many correspondences. According to the function 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 can be used to transmit electrical signals. The control signal port can be used to transmit control signals. Correspondingly, according to the functions of the signal input ports, the drive unit 2136 may include, for example, one or more control signal input ports and one or more electrical signal input ports. The electrical signal input port of the driving unit 2136 can be electrically connected with the electrical signal port of the connector 2137 . The control signal input port of the driving unit 2136 may be electrically connected to the control signal port of the connector 2137 .

The driving unit 2136 can be used to drive each light-emitting unit 2133 of the sub-light board 2130 and control the light emission of each light-emitting unit 2133 of the sub-light board 2130 . For example, the driving unit 2136 can turn off the light emitting unit 2133, control the brightness of the light emitting unit 2133, and the like. The driving unit 2136 may be, for example, a driving integrated circuit (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 used to provide the above-mentioned electrical signal, and the controller is used to generate the above-mentioned control signal, wherein the control signal may specifically be a PWM signal, driving The unit 2136 may specifically be a current source. Referring to FIG. 6 , the control module 217 can be connected to the connector 2137 through the connection piece 216 , so as to transmit electrical signals and control signals to the driving unit 2136 and the light emitting unit 2133 . Based on the above structures provided in FIGS. 3 to 6 , in FIG. 7 , an equivalent circuit of the connection relationship between 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 terminal GND through the driving unit 2136, and the driving unit 2136 is connected to the controller 2172; the controller 2172 is configured to control the driving The unit 2136 supplies a predetermined current to the light emitting unit 2133 . For example, the controller 2172 uses a pulse width modulation (pulse width modulation, PWM) signal output to the driving unit 2136 to control the magnitude of the predetermined current, thereby realizing PWM dimming. Specifically, PWM dimming is to adjust the magnitude of the predetermined current provided by the driving unit 2136 to the light emitting unit 2133 by controlling the duty ratio of the PWM signal, thereby realizing the adjustment of the brightness. For example, when the duty ratio of the PWM signal is 100%, the driving The unit 2136 provides the maximum current to the light emitting unit 2133, and the light emitting unit 2133 works at the maximum brightness at this time. At the same time, in order to provide the driving unit 2136 with an operating voltage, the power board 2171 can also provide electrical signals to the driving unit 2136 .

Generally, the peak brightness of each light emitting unit 2133 usually depends on the maximum power of the power board 2171 . At present, the multi-partition backlight solution in the industry can be that the light-emitting units 2133 of all light-emitting areas of the entire lamp panel 213 are connected to the same power supply board 2171, and a high-power power supply board supplies power to the light-emitting units 2133 of all light-emitting areas; combined with Figure 8 As shown, the connection relationship between the light-emitting unit 2133 and the power board 2171 is described as follows. Taking the light board 213 (or sub-light board 2130) containing 4 (rows)*4 (columns) light-emitting units 2133 as an example, the power board 2171 provides all light-emitting When the unit 2133 supplies power, the power board 2171 is connected to the anodes (+) of all the light emitting units 2133, and the connection mode of the cathodes (-) of the light emitting units 2133 is shown in FIG. 7 , and will not be repeated here. That is, the power board 2171 can provide light emitting power to all light emitting units 2133 . When an electronic device supports HDR certification, the display screen of the product is required to support high peak brightness of the light-emitting area of any specific percentage (eg, 1%, 10%, 20%, 30%, 40%, etc.). Specifically, as shown in FIG. 9, each small square in FIG. 9 represents a light-emitting unit. The connection relationship between the power supply board 2171 and the light-emitting unit 2133 can be specifically shown in FIG. 8, as shown in (a) in FIG. , when the HDR is turned off, the total power provided by the power board 2171 to all the light emitting units 2133 is 800W, and the peak brightness of the full white field is 500nits. And when HDR is turned on, the total power provided by the above-mentioned power board 2171 to all light-emitting units 2133 is 800W unchanged, and the controller determines the first area of the image frame according to the image frame (for example, the first area corresponds to (b) in Fig. 9 ) circle range (10% arbitrary light-emitting area)) needs to provide higher brightness, then it can control the light-emitting unit corresponding to the circle range on the lamp board to output higher brightness, for example, the controller 2172 can control the drive unit 2136 to The current output by 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, so that the white field in the circle range (10% arbitrary light-emitting area) in (b) of FIG. 9 The peak value of the luminance is 4000 nits; and reducing the power supplied to the light-emitting units in the other 90% of the area reduces the luminance of the light-emitting units in the other 90% of the area. Therefore, in the display screen of the liquid crystal panel, when the bright area and the dark area exist at the same time, the bright area (10% of any light-emitting area) is brighter in the light-emitting area corresponding to the backlight module, that is, the high peak brightness is realized in the bright area, and the dark area is brighter. area (the other 90% area) is darker in the corresponding light-emitting area of the backlight module. This results in high peak brightness for any specific percentage of the light-emitting area in the display. However, high-power power supply boards need to use devices such as inductors and capacitors with large electrical parameters, and the volume of devices such as inductors and capacitors with large electrical parameters is usually large, which is not conducive to thinning the product. Therefore, the industry has also proposed a number of solutions for low-power power supply boards. Among them, low-power power supply boards need to use devices such as inductors and capacitors with small electrical parameters, and the volume of devices such as inductors and capacitors with small electrical parameters is usually smaller. Small, which is conducive to the thinning of the product. At the same time, the low-power power supply board is also conducive to multiplexing to supply power to other electrical devices in electronic equipment. Wherein, each low-power power supply board corresponds to supply power to the light-emitting units in a partition on the light board, for example, one low-power power supply supplies power to several sub-light boards on the light board. Specifically referring to Figure 10 and Figure 11, the connection relationship between the light emitting unit 2133 and the power board 2171 is described as follows, to include the light board 213 (or sub-light board 2130) of 4 (row)*4 (column) light emitting unit 2133 For example, the power board 2171-1 supplies power to the light-emitting unit 2133 in the light-emitting area 1 above the center line in the lateral direction of the lamp board 213, and the power board 2171-1 is connected to the anode (+) of the light-emitting unit 2133 in the light-emitting area 1; 2171-2 supplies power to the light-emitting unit 2133 in the light-emitting area 2 on the lower side of the lateral midline of the lamp board 213, and the power board 2171-2 is connected to the anode (+) of the light-emitting unit 2133 in the light-emitting area 2. The power board 2171-1 supplies power to the light-emitting unit 2133 in the light-emitting area 3 on the left side of the longitudinal midline of the lamp board 213, and the power board 2171-1 is connected to the anode (+) of the light-emitting unit 2133 in the light-emitting area 3; the power board 2171-2 Power is supplied to the light-emitting unit 2133 in the light-emitting area 4 on the right side of the longitudinal midline of the lamp board 213, and the power board 2171-2 is connected to the anode (+) of the light-emitting unit 2133 in the light-emitting area 2. Based on the connection method between the power supply board and the light board provided in Figure 10, combined with Figure 12, each small square in Figure 12 can represent a light-emitting unit, as shown in (a) in Figure 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 respectively connected light-emitting areas, and the power board 2171-1 provides a maximum power of 400W to the light-emitting units in the light-emitting area 1 (the upper side of the lateral midline), The maximum power provided by the power board 2171-2 to the light-emitting units in the light-emitting area 2 (the lower side of the lateral midline) is 400W, the total power provided by the power board 2171-1 and the power board 2171-2 is 800W, and the peak brightness of the full white field It is 500nits. When HDR is turned on, as shown in (b) in Figure 12, the total power provided by the power board 2171-1 and the power board 2171-2 remains unchanged at 800W, because the horizontal center line divides the lamp board into two light-emitting areas , the power supply board 2171-1 and the power supply board 2171-2 supply power to the light-emitting units in the upper and lower two light-emitting areas respectively, so only the white field within the circle range bisected by the midline (10% of the light-emitting area bisected by the midline) The peak brightness is 4000 nits, and the power board 2171-1 and power board 2171-2 provide a total power of 640W to the light emitting unit 2133 in the circle area; while the brightness of the other 90% of the area is reduced. However, as shown in FIG. 13 , when the circle range is not bisected by the lateral midline (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), therefore , as shown in Figure 13, the peak brightness of the white field within the circle range (10% light-emitting area) is far less than 4000 nits, so it cannot support the high peak brightness of any specific percentage of the light-emitting area in the display screen, that is, it cannot effectively make the bright area (10% % light-emitting area) is brighter in the light-emitting area corresponding to the backlight module, and the dark area (other 90% area) is darker in the light-emitting area corresponding to the backlight module. Based on the connection method between the power supply board and the light board provided in Figure 11, combined with Figure 14, each small square in Figure 14 can represent a light-emitting unit, combined with Figure 14 (a), when HDR is turned off , the power supply board 2171-1 and the power supply board 2171-2 respectively supply power to the light-emitting units in the respective connected light-emitting areas, and the power supply board 2171-1 provides a maximum power of 400W to the light-emitting units in the light-emitting area 3 (the left side of the longitudinal midline), The power board 2171-2 provides a maximum power of 400W to the light-emitting units in the light-emitting area 4 (the right side of the longitudinal center line), the total power provided by the power board 2171-1 and the power board 2171-2 is 800W, and the peak brightness of the full white field is 500nits. When HDR is turned on, as shown in (b) in Figure 14, the total power provided by the power board 2171-1 and the power board 2171-2 remains unchanged at 800W, because the longitudinal center line divides the lamp board into two light-emitting areas , the power supply board 2171-1 and the power supply board 2171-2 supply power to the light-emitting units in the left and right light-emitting areas, so only the white field within the circle range bisected by the midline (10% of the light-emitting area bisected by the midline) The peak brightness is 4000 nits, and the power board 2171-1 and power board 2171-2 provide a total power of 640W to the light emitting unit 2133 in the circle area; while the brightness of the other 90% of the area is reduced. However, as shown in FIG. 15, when the range of the circle is not equally divided by the longitudinal midline (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), therefore As shown in Figure 15, the peak brightness of the white field within the circle range (10% light-emitting area) is far less than 4000 nits, so it cannot support the high peak brightness of any specific percentage of the light-emitting area in the display screen, that is, it cannot effectively make the bright area (10% The light-emitting area) is brighter in the light-emitting area corresponding to the backlight module, and the dark area (other 90% of the area) is darker in the light-emitting area corresponding to the backlight module. Of course, the above mainly uses two low-power power boards as an example to supply power to the light-emitting units in the two light-emitting areas on the lamp board. When more low-power power boards are included, since the light-emitting units on the lamp board are divided into To more light-emitting areas, while the power supply of a single low-power power supply board is lower, it is even more difficult to meet the high peak brightness that supports any specific percentage of the light-emitting area in the display screen.

In order to solve the above problems, the electronic device based on Figure 2 provided by the embodiment of the present application includes a first power board, a second power board, and a light-emitting unit arranged on the lamp board, and the unit area at any position on the lamp board is at least It includes two light-emitting units; it should be noted that the unit area is a regular area of any size at any position on the light board, and the shape is not limited. It can be a circle or a polygon (such as a square, a rhombus, a triangle, etc.) ; In some examples, it can be interpreted as the smallest area that is simultaneously powered by the first power board and the second power board, for example, the unit area can include two light emitting units. In this way, since there are light-emitting units powered by the first power supply board and the second power supply board in each unit area, the power of each power supply board can be output to the unit area, so that the display screen of the liquid crystal panel can In the above, when the bright area and the dark area exist at the same time, the power of each power board can be output to one or more unit areas corresponding to the bright area on the light board, so that the bright area is brighter, and the dark area is on the corresponding unit area of the light board. The light-emitting area is darker, enabling high peak brightness for any given percentage of the light-emitting area in the display.

In some examples, the area of the unit area is less than or equal to one tenth of the light emitting area of the light panel. Usually, the test window specified in HDR certification is 10% of the light-emitting area of the light panel. Of course, based on different HDR certification standards, HDR certification may also be performed in a smaller or larger test window. For example, the test window can be the display screen. 1%, 10%, 20%, 30%, 40%, etc.

In addition, in order to ensure that each power board outputs power to the light-emitting units in the unit area in a balanced manner, so that the brightness of the entire light board is uniform, the number of light-emitting units powered by the power board 2171-1 and the power board 2171-2 in the unit area same.

Considering the specific connection relationship between multiple power boards and light emitting units, in some examples, a unit area includes multiple sub light emitting areas, each sub light emitting area includes one or more light emitting units, and the power board 2171-1 is at least one of the multiple sub light emitting areas. The light-emitting units in a sub-light-emitting area supply power, for example, the first light-emitting unit in the first sub-light-emitting area, and the power board 2171-2 supplies power for the light-emitting units in at least one other sub-light-emitting area in the plurality of sub-light-emitting areas, for example, The second light emitting unit in the second sub light emitting area supplies power. In order to ensure uniform brightness in each unit area, the power board 2171-1 and the power board 2171-2 supply power to the same number of sub-light-emitting areas in each unit area. Specifically, referring to FIG. 16 , the connection relationship between the power board and the light-emitting unit is described as follows. Take the electronic device including two power boards 2171-1 and 2171-2, and the unit area includes 2*2 sub-light-emitting areas as an example. The unit area (light emitting area 1) as shown in FIG. 16 specifically includes sub light emitting area 1, sub light emitting area 2, sub light emitting area 3 and sub light emitting area 4 distributed in an array (x=2 at this time). Wherein, as shown in FIG. 16 , each sub-light-emitting area includes a light-emitting unit 2133. In this way, the power board 2171-1 is connected to the light-emitting units in sub-light-emitting area 1 and sub-light-emitting area 2, and the power board 2171-2 is connected to sub-light-emitting area 3. and the light-emitting units in the sub-light-emitting region 4 . It should be noted that, although the above-mentioned FIG. 16 shows only one light-emitting unit for each sub-light-emitting area, in some examples, each sub-light-emitting area may also contain multiple light-emitting units. The light emitting units can be connected in parallel or in series. In this way, as shown in FIG. 16 , when a light-emitting unit is provided in each sub-light-emitting area, the light-emitting units on the lamp board can be grouped in a checkerboard pattern, that is, when the current light-emitting unit is connected to the power board 2171-1, adjacent (according to the figure) As shown in 16, the light-emitting units adjacent to the top, bottom, left or right) can be connected to the power board 2171-2. In addition, in order to facilitate circuit design, the power supply board 2171-1 and the connections between the power supply board 2171-1 and the multiple sub-light-emitting areas in the unit area are in a predetermined order. As shown in FIG. 16 , the connection sequence between each sub-light-emitting area and the power board 2171-1 and power board 2171-2 in the unit area (light-emitting area 2) is the same as that in the light-emitting area 1, which simplifies the circuit design.

Based on the connection method between the power board and the light board provided in Figure 16, combined with Figure 17, each small square in Figure 17 can represent a light-emitting unit, and Figure 17 contains more light-emitting units than Figure 16, but The connection mode of each light emitting unit is the same as the description in FIG. 16 . As shown in (a) in Figure 17, when the HDR is turned off, the power board 2171-1 and the power board 2171-2 supply power to all the light emitting units connected to them respectively, and the power board 2171-1 provides power to the light emitting units connected to it. The maximum power is 400W, the maximum power provided by the power board 2171-2 to the light-emitting unit connected to it is 400W, the total power provided by the power board 2171-1 and the power board 2171-2 is 800W, and the peak brightness of the full white field is 500nits. And when HDR is turned on, as shown in (b) in FIG. At the same time, power is supplied to the unit area on the light board, when the controller determines that the first area of the image frame needs to provide higher brightness according to the image frame, for example, the first area corresponds to the circle range (10% arbitrary light-emitting area), the circle range Corresponding to one or more unit areas on the lamp board; then the circle range can be controlled to output higher brightness on the corresponding light-emitting unit on the lamp board, for example, the controller 2172 can control the drive unit 2136 to one or more units within the circle range The current output by the light emitting units in multiple unit areas, 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 circle range is 640W, so that the peak brightness of the white field in the circle range is 4000nits , while the brightness of the other 90% of the area is reduced. Therefore, in the display screen of the liquid crystal panel, when bright areas and dark areas exist at the same time, the bright areas (for example, 10% of any light-emitting areas) are brighter in the light-emitting areas corresponding to the backlight module, and the dark areas (the other 90% areas) are brighter. The corresponding light-emitting area of the backlight module is darker, that is, it can support high peak brightness of any specific percentage of the light-emitting area in the display screen.

In another example, the first power supply board is connected to the first n columns of light-emitting units in the 2n consecutively distributed light-emitting units, and the second power supply board is connected to the last n-column light-emitting units in the continuously distributed 2n-column light-emitting units, where n is greater than or a positive integer equal to 1. In this solution, the columns of light emitting units connected to the first power supply board are spaced apart from the columns of light emitting units connected to the second power supply board. When the electronic device includes two power supply boards, n represents the number of columns of light emitting units that are spaced apart. Specifically, referring to FIG. 18, the connection relationship between the power board and the light emitting unit is described as follows. The electronic device includes two power boards 2171-1 and 2171-2. When n=1, the connection diagram of the power board 2171-1 The first row of light emitting units in the first group and the third row of light emitting units in the second group of 18, the power board 2171-2 is connected to the second row of light emitting units in the first group and the fourth row of light emitting units in the second group Units, that is, 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 are separated by one column. It should be noted that although the above-mentioned FIG. 18 shows only two columns of light-emitting units for the first group, it can be understood that each group may also include more columns of light-emitting units (as shown in FIG. 19 ), for example, the first A group can include 4 rows of light emitting units, the power board 2171-1 is connected to the first and second row of light emitting units, and the power board 2171-2 is connected to the third and fourth row of light emitting units, that is, the power board 2171-1 is connected to the light emitting units The columns of the light emitting units connected to the power board 2171-2 are separated by 2 columns. As another example, referring to FIG. 20 , the connection relationship between the power board and the light-emitting unit is described as follows. The electronic equipment includes two power boards 2171-1, 2171-2 and 2171-3 (n=3 at this time), m= 1, that is, each group contains 3 consecutive columns of light-emitting units as an example. In this way, the power board 2171-1 is connected to the light-emitting units in the first column in the first group and the light-emitting units in the fourth column in the second group, and the power board 2171-2 is connected to the light-emitting units in the second column in the first group and the light-emitting units in the second group. The 5th column of light-emitting units in the first group and the 6th column of light-emitting units in the second group are connected to the power board 2171-3. It should be noted that although each power board in the above-mentioned Figure 18 and Figure 20 is only connected to one column of light-emitting units in one group, it can be understood that each group can also include more columns of light-emitting units, so that each power board Multiple columns of light-emitting units are connected in each group. For example, in FIG. 19, the first group may include four columns of light-emitting units, the power supply board 2171-1 is connected to the first column and the second column of light-emitting units, and the power supply board 2171-2 is connected to the first column of light-emitting units. 3 columns and 4 columns of light-emitting units. Thus, in the lamp boards shown in FIG. 18 , FIG. 19 and FIG. 20 , n power boards can simultaneously provide power to the light-emitting units in a unit area (light-emitting area).

Based on the connection method between the power board and the light board provided in Figure 18, combined with Figure 21, each small square in Figure 21 can represent a light-emitting unit, and Figure 21 contains more light-emitting units than Figure 18, but The connection mode of each light emitting unit is the same as the description in FIG. 18 . As shown in (a) in FIG. 21, when the HDR is turned off, the power board 2171-1 and the power board 2171-2 supply power to all the light emitting units connected to them respectively, and the power board 2171-1 provides power to the light emitting units connected to it. The maximum power is 400W, the maximum power provided by the power board 2171-2 to the light-emitting unit connected to it is 400W, the total power provided by the power board 2171-1 and the power board 2171-2 is 800W, and the peak brightness of the full white field is 500nits. And when HDR is turned on, as shown in (b) in FIG. At the same time, power is supplied to the unit area on the light board, when the controller determines that the first area of the image frame needs to provide higher brightness according to the image frame, for example, the first area corresponds to the circle range (10% arbitrary light-emitting area), the circle range Corresponding to one or more unit areas on the lamp board; then the light-emitting units within the circle range corresponding to one or more unit areas on the lamp board can be controlled to output higher brightness, for example, the controller 2172 can control the drive unit 2136 The current output to the light-emitting units in one or more unit areas within the circle, 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 circle is 640W, so the circle range The peak brightness of the white point within is 4000nits, while the brightness of the other 90% of the area is reduced. Therefore, in the display screen of the liquid crystal panel, when bright areas and dark areas exist at the same time, the bright areas (for example, 10% of any light-emitting areas) are brighter in the light-emitting areas corresponding to the backlight module, and the dark areas (the other 90% areas) are brighter. The corresponding light-emitting area of the backlight module is darker, that is, it can support high peak brightness of any specific percentage of the light-emitting area in the display screen.

In another example, the first power board is connected to the first n rows of light-emitting units in the continuously distributed 2n rows of light-emitting units, and the second power board is connected to the last n rows of light-emitting units in the continuously distributed 2n rows of light-emitting units, where n is greater than or a positive integer equal to 1. In this scheme, the rows of light emitting units connected to the first power supply board are spaced apart from the rows of light emitting units connected to the second power supply board. When the electronic device includes two power supply boards, n represents the number of rows of spaced light emitting units. Specifically, as shown in FIG. 22, the connection relationship between the power board and the light emitting unit is described as follows. The electronic device includes two power boards 2171-1 and 2171-2. When n=1, the power board 2171-1 is connected to the first The first row of light-emitting units in one group and the third row of light-emitting units in the second group, the power board 2171-2 is connected to the second row of light-emitting units in the first group and the fourth row of light-emitting units in the second group, namely The row of light emitting units connected to the power board 2171-1 and the row of light emitting units connected to the power board 2171-2 are separated by one row. It should be noted that although only two rows of light-emitting units are shown for the first group in FIG. 22 above, it can be understood that each group may also include more rows of light-emitting units. For example, the first group may include four rows of light-emitting units. , the power board 2171-1 is connected to the light-emitting units in the first row and the second row, and the power board 2171-2 is connected to the light-emitting units in the third and fourth rows, that is, the row of the light-emitting units connected to the power board 2171-1 is connected to the power board 2171- 2 rows of connected light-emitting units are separated by 2 rows. It should be noted that, although each power supply board in FIG. 22 above is only connected to one row of light-emitting units in one group, it can be understood that each group can also include more rows of light-emitting units, so that each power board is connected to one row of light-emitting units in each group Connect multiple 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 first row and the second row of light emitting units, and the power board 2171-2 connects the third row and the fourth row of light emitting units . Thus, in the lamp board shown in FIG. 22, n power boards can simultaneously provide power to the light emitting units in the unit area (light emitting area).

Based on the connection method between the power board and the light board provided in Figure 22, combined with Figure 23, each small square in Figure 23 can represent a light-emitting unit, and Figure 23 contains more light-emitting units than Figure 22, but The connection mode of each light emitting unit is the same as the description in FIG. 22 . As shown in (a) in Figure 23, when the HDR is turned off, the power board 2171-1 and the power board 2171-2 supply power to all the light emitting units connected to them respectively, and the power board 2171-1 provides power to the light emitting units connected to it. The maximum power is 400W, the maximum power provided by the power board 2171-2 to the light-emitting unit connected to it is 400W, the total power provided by the power board 2171-1 and the power board 2171-2 is 800W, and the peak brightness of the full white field is 500nits. And when HDR is turned on, as shown in (b) in FIG. At the same time, power is supplied to the unit area on the light board, when the controller determines that the first area of the image frame needs to provide higher brightness according to the image frame, for example, the first area corresponds to the circle range (10% arbitrary light-emitting area), the circle range Corresponding to one or more unit areas on the lamp board; then the light-emitting units within the circle range corresponding to one or more unit areas on the lamp board can be controlled to output higher brightness, for example, the controller 2172 can control the drive unit 2136 The current output to the light-emitting units in one or more unit areas within the circle, 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 circle is 640W, so the circle range The peak brightness of the white point within is 4000nits, while the brightness of the other 90% of the area is reduced. Therefore, in the display screen of the liquid crystal panel, when the bright area and the dark area exist at the same time, 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 the area) is brighter in the light-emitting area corresponding to the light panel. The light-emitting area corresponding to the light panel is darker, that is, it can support high peak brightness of any specific percentage of the light-emitting area in the display screen.

The above mainly uses two power boards as an example to give the specific implementation of the electronic device. In some examples, the electronic device may also include more power boards, for example, three power boards (refer to FIG. 20 ), Certainly also can be four power boards (shown with reference to Fig. 24) or, more power boards. Referring to Figure 24, the connection relationship between the power board and the light-emitting unit is described as follows. The electronic equipment includes four power boards 2171-1, 2171-2, 2171-3, and 2171-4. The unit area (Light-emitting area) includes 2*2 sub-light-emitting areas as an example. The light emitting area in FIG. 24 specifically includes the sub light emitting area 1 , the sub light emitting area 2 , the sub light emitting area 3 and the sub light emitting area 4 distributed in an array. Wherein, as shown in FIG. 24 , each sub-light-emitting area includes a light-emitting unit 2133. In this way, the power board 2171-1 is connected to the light-emitting unit in the sub-light-emitting area 1, and the power board 2171-2 is connected to the light-emitting unit in the sub-light-emitting area 2. The power board 2171-3 is connected to the light-emitting units in the sub-light-emitting area 3, and the power board 2171-4 is connected to the light-emitting units in the sub-light-emitting area 4. It should be noted that although the above-mentioned FIG. 24 shows only one light-emitting unit for each sub-light-emitting area, in some examples, each sub-light-emitting area may also contain multiple light-emitting units. Of course, multiple light-emitting units in the same sub-light-emitting area The light emitting units can be connected in parallel or in series. Wherein, the embodiment of the present application does not limit the connection order of each sub-light-emitting area and the power supply board in each light-emitting area. Of course, in order to improve the uniformity of light emission, in each light-emitting area, each sub-light-emitting area The connection order can be the same.

In this way, based on the above-mentioned electronic equipment, when it is necessary to display an image as shown in Figure 25 on the screen assembly (the moon in the dark night, the image area of the "moon" is a bright area, while other areas are dark areas), the specific processing steps are as follows: The electronic device first processes the data frame containing the image to determine the brightness of each pixel of the image. When the first area of the image frame needs to provide higher brightness (for example, the brightness of the first area is greater than other areas), the electronic device The device recognizes the first area as a bright area, and other areas as dark areas, where the brightness of the first area can be the average value of the brightness of all pixels in this area, so that the electronic device controls the image area of the bright area "moon" The light-emitting units corresponding to the area where the "circle" on the light board shown in Figure 26 has higher brightness, while the light-emitting units in other areas have lower brightness, thereby improving the HDR effect of the picture. Specifically referring to 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 board is located can be increased, and the PWM signal of the driving unit 2136 connected to the light-emitting unit in other areas can be reduced. The duty cycle of the signal. In this way, when the light board provides a backlight solution, the image area of the "moon" can provide brighter brightness in the light-emitting area corresponding to the light board, and the brightness provided by other areas in the light-emitting area corresponding to the light board is darker, which can improve the image quality. HDR enables users to have a better viewing effect. In the scheme provided in the embodiments of this application, there are light-emitting units powered by all multiple power supply boards in one or more unit areas of each electronic device that is less than or equal to the test window of HDR certification, so each power supply The power of the panel can be output to the unit area, so that in the display screen of the liquid crystal panel, when the bright area and the dark area exist at the same time, the bright area is brighter in one or more unit areas corresponding to the lamp panel, and the dark area is brighter. (Other areas) One or more unit areas corresponding to the light panel are darker, so as to be able to support high peak brightness of any specific percentage of light-emitting areas in the display screen. In this way, when the liquid crystal panel displays the image in FIG. 25 , the image area of the "moon" can be made brighter, so that the user can observe a brighter moon.

Although the present application has been described in conjunction with various embodiments herein, those skilled in the art can understand and realize the present application by referring to the drawings, the disclosure, and the appended claims during the implementation of the claimed application. Other variations of the embodiments are disclosed. In the claims, the word "comprising" does not exclude other elements or steps, and "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 these measures cannot be combined to advantage.

Having described various embodiments of the present application above, the foregoing description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and alterations 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 to best explain the principle of each embodiment, practical application or improvement of technology in the market, or to enable other ordinary skilled in the art to understand each embodiment disclosed herein.

Claims (10)

1. An electronic device, characterized in that it includes a backlight module and a liquid crystal panel; the backlight module includes a backboard, a flat board, a lamp board, and a diffusion board; wherein the flat board is located between the back board and the lamp Between the boards, the lamp board is located between the flat board and the diffuser board; the electronic equipment also includes: a first power board, a second power board, and a light emitting unit arranged on the lamp board. A unit area at any position on the lamp board includes at least two light emitting units;

   The first power supply board is connected to the first light emitting unit in the unit area on the light board, and the second power supply board is connected to the second light emitting unit in the unit area on the light board.
2. The electronic device according to claim 1, wherein the first power supply board is connected to the first n columns of light-emitting units in the continuously distributed 2n columns of light-emitting units, and the second power supply board is connected to the continuously distributed 2n-column light-emitting units In the last n columns of light-emitting units, n is a positive integer greater than or equal to 1.
3. The electronic device according to claim 1, wherein the first power board is connected to the first n rows of light-emitting units in the continuously distributed 2n rows of light-emitting units, and the second power board is connected to the continuously distributed 2n rows of light-emitting units In the last n rows of light emitting units, n is a positive integer greater than or equal to 1.
4. The electronic device according to claim 1, wherein the unit area includes a plurality of sub-light-emitting areas, and the sub-light-emitting areas include one or more light-emitting units; the first power board is the The light-emitting units in the first sub-light-emitting area in the second power supply board supply power to the light-emitting units in the second sub-light-emitting area of the plurality of sub-light-emitting areas.
5. The electronic device according to claim 4, wherein the unit area includes a first sub-light-emitting area and a second sub-light-emitting area, the first sub-light-emitting area includes a first light-emitting unit, and the second sub-light-emitting area The area includes the second sub-light-emitting unit;

   The first power board is connected to the first light-emitting unit in the first sub-light-emitting area; the second power board is connected to the second light-emitting unit in the second sub-light-emitting area.
6. The electronic device according to claim 4, wherein,

   The number of the sub-light emitting regions powered by the first power board in the unit area is the same as the number of the sub-light-emitting regions powered by the second power 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 regions in the unit region in a predetermined order.
8. The electronic device according to any one of claims 1-7, characterized in that, in the unit area, the number of the light-emitting units powered by the first power supply board is different from the number of light-emitting units powered by the second power supply board. The number of the light emitting units is the same.
9. The electronic device according to any one of claims 1-7, wherein the power board is connected to the anode of the light-emitting unit, the cathode of the light-emitting unit is connected to GND through a drive unit, and the drive unit is connected to the controller;

   The controller is configured to control the drive unit to supply predetermined current to the light emitting unit.
10. The electronic device according to any one of claims 1-7, wherein the light emitting unit comprises one or more light emitting diodes (LEDs) connected in series.

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