WO2020118658A1

WO2020118658A1 - Display assembly and electronic device

Info

Publication number: WO2020118658A1
Application number: PCT/CN2018/121102
Authority: WO
Inventors: 刘洋; 聂廷书
Original assignee: 深圳市柔宇科技有限公司
Priority date: 2018-12-14
Filing date: 2018-12-14
Publication date: 2020-06-18
Also published as: CN113168812A

Abstract

Provided are a display assembly (100) and an electronic device (1000). The display assembly (100) comprises a display screen (10), a sensing module (20) and a compensation module (30), the display screen (10) comprises a pixel array (12), the pixel array (12) comprises a plurality of pixel blocks (122), each pixel block (122) comprises a first pixel (1222) and a second pixel (1224), the first pixel (1222) is connected to the sensing module (20), the sensing module (20) is used to detect the electrical characteristic value of the first pixel (1222), the compensation module (30) is used to calculate the compensation value of the pixel block (122) according to the electrical characteristic value of each first pixel (1222), and to drive the first pixel (1222) and the second pixel (1224) according to the compensation value.

Description

Display assembly and electronic device

Technical field

The present application relates to the field of display technology, in particular to a display assembly and an electronic device.

Background technique

Related art organic light-emitting diode (Organic Light-Emitting Diode, OLED) displays are generally driven by thin film transistors (Thin Film Transistor, TFT). However, with the prolonged use time, the physical properties of TFT and OLED will shift and deteriorate, such as the change of TFT threshold voltage and electron mobility and the aging of OLED, which will gradually deteriorate the image display quality.

Summary of the invention

Embodiments of the present application provide a display assembly and an electronic device.

The display assembly of the embodiment of the present application includes a display screen, a sensing module, and a compensation module. The display screen includes a pixel array. The pixel array includes a plurality of pixel blocks, and each of the pixel blocks includes a first pixel and a second pixel. , The first pixel is connected to the sensing module, the sensing module is used to detect the electrical characteristic value of the first pixel, and the compensation module is used to determine the electrical characteristic value of each of the first pixels The compensation value of the pixel block is calculated, and the first pixel and the second pixel are driven according to the compensation value.

An electronic device according to an embodiment of the present application includes a main board and the display assembly of the above embodiment, and the main board is connected to the display assembly.

In the display assembly and the electronic device according to the embodiments of the present application, the compensation value of the first pixel and the second pixel is calculated from the electrical characteristic value of the first pixel, which can reduce the second pixel while ensuring the image display quality after long-term use The wiring and pins of the sensing module can improve the opening ratio of the display screen and save the storage resources of the display component.

Additional aspects and advantages of the embodiments of the present application will be partially given in the following description, and some will become apparent from the following description, or be learned through practice of the embodiments of the present application.

BRIEF DESCRIPTION

The above and/or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

FIG. 1 is a schematic block diagram of an electronic device according to an embodiment of the present application.

2 is a schematic plan view of a pixel array according to an embodiment of the present application.

3 is a schematic plan view of a pixel array according to another embodiment of the present application.

4 is a schematic plan view of a pixel array according to another embodiment of the present application.

5 is a schematic plan view of a pixel array according to still another embodiment of the present application.

6 is a schematic plan view of a pixel array according to another embodiment of the present application.

7 is a schematic plan view of a pixel array according to yet another embodiment of the present application.

8 is a schematic plan view of a pixel array according to still another embodiment of the present application.

9 is a schematic plan view of a pixel array according to another embodiment of the present application.

FIG. 10 is a schematic diagram of the circuit architecture of the pixel blocks of the pixel array in FIG. 2.

FIG. 11 is a control timing chart of the pixel block according to the embodiment of the present application.

12 is a schematic diagram of a pixel internal circuit of a pixel block according to an embodiment of the present application.

Main reference numbers:

Electronic device 1000, display assembly 100, display screen 10, pixel array 12, pixel block 122, first pixel 1222, second pixel 1224, sensing module 20, compensation module 30, driving module 40, digital-to-analog converter DAC, data The distributor DMUX, the first switch SW1, the analog-to-digital converter ADC, the second switch SW2, the third switch SW3, the first transistor T1, the second transistor T2, the third transistor DT, the capacitor C, and the light emitting diode d.

detailed description

The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the drawings, in which the same or similar reference numerals indicate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary, and are only used to explain the present application, and cannot be construed as limiting the present application.

In the description of the present application, it should be understood that the terms “first” and “second” are used for description purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise specifically limited.

In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be fixed connection or detachable Connected, or integrally connected; may be mechanical, electrical, or may communicate with each other; may be directly connected, or may be indirectly connected through an intermediary, may be the connection between two elements or the interaction of two elements relationship. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.

The following disclosure provides many different implementations or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit this application. In addition, the present application may repeat reference numerals and/or reference letters in different examples. Such repetition is for simplicity and clarity, and does not in itself indicate the relationship between the various embodiments and/or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art may be aware of the application of other processes and/or the use of other materials.

Referring to FIG. 1, an embodiment of the present application further provides an electronic device 1000. The electronic device 1000 includes a main board 200 and a display component 100. The main board 200 is connected to the display component 100.

The main board 200 may input corresponding image data signals to the display assembly 100. The display component 100 can process and display the input image signal. It should be noted that the electronic device 1000 according to the embodiment of the present application includes, but is not limited to, electronic devices such as displays, mobile phones, tablet computers, notebook computers, e-books, televisions, and wearable smart devices.

Please refer to FIG. 2 together. The embodiment of the present application provides a display assembly 100. The display assembly 100 includes a display screen 10, a sensing module 20, and a compensation module 30. The display screen 10 includes a pixel array 12, the pixel array 12 includes a plurality of pixel blocks 122, and each pixel block 122 includes a first pixel 1222 and a second pixel 1224 The first pixel 1222 is connected to the sensing module 20, the sensing module 20 is used to detect the electrical characteristic value of the first pixel 1222, and the compensation module 30 is used to calculate the compensation of the pixel block 122 according to the electrical characteristic value of each first pixel 1222 Value and drive the first pixel 1222 and the second pixel 1224 according to the compensation value.

In the display assembly 100 and the electronic device 1000 of the embodiment of the present application, the compensation values of the first pixel 1222 and the second pixel 1224 are calculated from the electrical characteristic values of the first pixel 1222, while ensuring the image display quality after long-term use, The wiring and pins of the second pixel 1224 and the sensing module 20 can be reduced, thereby improving the aperture ratio of the display screen 10 and saving the storage resources of the display assembly 100.

Specifically, the aperture ratio refers to the ratio between the area of the light-passing portion after removing the wiring portion and the transistor portion of each sub-pixel and the overall area of each sub-pixel. It can be understood that the higher the aperture ratio, the higher the efficiency of light passing, and the wiring will block the pixel light emission. Therefore, in the embodiment of the present application, since the second pixel 1224 is not connected to the sensing module 20, the wiring and pins of the second pixel 1224 and the sensing module 20 are reduced, and the wiring to the second pixel 1224 is reduced. The occlusion of light emission can therefore increase the aperture ratio of the second pixel 1224.

In addition, since the sensing module 20 only detects the electrical characteristic value of the first pixel 1222 and does not detect the electrical characteristic value of the second pixel 1224, and calculates the compensation value of the pixel block 122 according to the electrical characteristic value of each first pixel 1222, Therefore, the first pixel 1222 and the second pixel 1224 are driven according to the compensation value, so that there is no need to store the electrical characteristic value of the second pixel 1224, and there is no need to perform calculations related to the electrical characteristic value of the second pixel 1224, thus saving display components 100 storage resources.

In some embodiments, the pixel block 122 includes n pixels, the number of the first pixels 1222 is n-k, the number of the second pixels 1224 is k, n and k are positive integers, and n-k is greater than or equal to 1.

In this way, the division of pixel blocks is realized. Please note that because the pixel block 122 is too large, it is easy for human eyes to visually perceive the difference in display effect between the display component 100 in this embodiment of the present application and the general display component. Therefore, in the embodiment of this application, one pixel block The number of pixels in 122 is less than or equal to 8 in the horizontal direction of the pixel array and less than or equal to 4 in the vertical direction of the pixel array. When the pixels in one pixel block 122 are not adjacent, the span of the pixel block 122 does not exceed the above range.

In addition, the visual effect perceived by the human eye is also affected by the pixel density (Pixels Per Perch, PPI) and the viewing distance of the user. In the actual production process, it is necessary to divide the pixel block, pixel density and The viewing distance is considered as a whole.

In addition, the pixels in one pixel block 122 may be adjacent or non-adjacent. In the pixel array 12, the pixels in one pixel block 122 may all be in the same row, all in the same column, or may be in different rows and columns, respectively. The pixel array 12 may include one pixel block 122 or multiple pixel blocks 122. When the pixel array 12 includes multiple pixel blocks 122, the composition and arrangement of the pixels in the multiple pixel blocks 122 may be the same, or It can be different. Here, the specific number, specific arrangement, and specific configuration of the pixels in the pixel block 122 are not limited.

In one example, please refer to FIG. 2, the pixel block 122 includes 3 pixels in the same row, the number of the first pixels 1222 is 2, the number of the second pixels 1224 is 1, and between the two first pixels 1222 There is one second pixel 1224 in the interval, and two first pixels 1222 are connected to the sensing module 20 through the sensing line 21.

In another example, please refer to FIG. 3, the pixel block 122 includes 2 pixels located in the same row, the number of the first pixels 1222 is one, the number of the second pixels 1224 is one, and the first pixels 1222 pass sensing The line 21 is connected to the sensing module 20.

In yet another example, please refer to FIG. 4, the pixel block 122 includes 6 pixels in two rows, the number of the first pixels 1222 is 4, the number of the second pixels 1224 is 2, and the first pixels 1222 pass the sensing The line 21 is connected to the sensing module 20.

In yet another example, referring to FIG. 5, the pixel block 122 includes 9 pixels located in three rows, the number of the first pixels 1222 is 6, the number of the second pixels 1224 is 3, and the first pixels 1222 pass the sensing The line 21 is connected to the sensing module 20.

In another example, referring to FIG. 6, the pixel block 122 includes 7 pixels in a row, the number of the first pixels 1222 is 4, the number of the second pixels 1224 is 3, and the four first pixels 1222 cross The sensing module 20 is connected by two sensing lines 21.

In yet another example, please refer to FIG. 7, the pixel block 122 includes two pixels located in the same column, the number of the first pixels 1222 is one, the number of the second pixels 1224 is one, and the first pixels 1222 pass sensing The line 21 is connected to the sensing module 20.

In yet another example, please refer to FIG. 8, the pixel block 122 includes two pixels adjacent in the diagonal direction, the number of the first pixels 1222 is one, and the number of the second pixels 1224 is one, the first pixels 1222 is connected to the sensing module 20 through the sensing line 21.

In another example, please refer to FIG. 9, the pixel array 12 includes two pixel blocks 122, and the specific structures of the pixels of the two pixel blocks 122 are different. Specifically, one pixel block 122 in the pixel array 12 includes 3 pixels in a row, the number of the first pixels 1222 is 2, the number of the second pixels 1224 is 1, and there is a gap between the two first pixels 1222 One second pixel 1224 and two first pixels 1222 are connected to the sensing module 20 through a sensing line 21. Another pixel block 122 in the pixel array 12 includes 6 pixels in two rows, the number of the first pixels 1222 is 4, the number of the second pixels 1224 is 2, and the first pixels 1222 pass through another sensing line 21connected to the sensing module 20.

Please note that the above example is only an example, and does not represent a limitation on the division of the pixel block 122 and the composition of the first pixel 1222 and the second pixel 1224 in the pixel block 122.

In some embodiments, the compensation module 30 is used to calculate the electrical characteristic value of the pixel block 122 according to the electrical characteristic value of the first pixel 1222, and calculate according to the electrical characteristic value of the pixel block 122 and the grayscale adjustment value pre-stored in the display assembly 100 The compensation value of the pixel block 122.

In this way, the compensation value of the pixel block 122 is determined. Specifically, in the example of FIG. 2, the pixel block 122 includes two first pixels 1222 and one second pixel 1224, and there is a second pixel 1224 between each of the first pixels 1222, and each first pixel 1222 Both are connected to the sensing module 20 through the sensing line 21. The compensation module 30 calculates the electrical characteristic value of the pixel block 122 according to the electrical characteristic values of the two first pixels 1222 obtained through the sensing module 20, and then calculates the electrical characteristic value of the pixel block 122 and the pre-stored gray scale adjustment value Difference, thereby obtaining the compensation value of the pixel block 122. After the compensation value is obtained, the compensation value is compensated for two first pixels 1222 and one second pixel 1224. That is to say, on the basis of the pre-stored grayscale adjustment values, the two first pixels 1222 and one second pixel 1224 are compensated for the compensation value, so that both the first pixel 1222 and the one second pixel 1224 reach The electrical characteristic value of the pixel block 122.

Specifically, in some embodiments, the compensation module 30 is configured to use the average value of the electrical characteristic values of all the first pixels 1222 in each pixel block 122 as the electrical characteristic value of the pixel block 122.

In this way, the electrical characteristic value of the pixel block 122 is calculated based on the electrical characteristic value of the first pixel 1222. In the example of FIG. 2, the pixel block 122 includes two first pixels 1222 and one second pixel 1224, and a second pixel 1224 is spaced between the two first pixels 1222, and each first pixel 1222 passes the sense The measuring line 21 is connected to the sensing module 20. The compensation module 30 obtains the electrical characteristic values of the two first pixels 1222 through the sensing module 20, calculates the average value of the electrical characteristic values of the two first pixels 1222, and uses the calculated average value as the value of the pixel block 122. Electrical characteristics.

Of course, in other embodiments, all the first pixels 1222 in the pixel block 122 may be given different weights, and then the weighted average may be obtained. The weight may be determined according to the distance of each first pixel 1222 from the second pixel 1224. Here, the specific method of calculating the electrical characteristic value of the pixel block 122 based on the electrical characteristic value of the first pixel 1222 in the pixel block 122 is not limited.

In addition, the electrical characteristic value of the first pixel 1222 includes a current value and/or voltage value, the electrical characteristic value of the pixel block 122 includes a current value and/or voltage value, and the compensation value includes a voltage value.

In some embodiments, the sensing module 20 is used to detect the electrical characteristic value of the first pixel 1222 according to the preset grayscale of the binding point.

In this way, the detection of the electrical characteristic value of the first pixel 1222 is realized. The binding point gray scale is a gray scale selected from each gray scale. The electrical characteristics of the pixel in each other gray scale can be derived from the electrical characteristics of the pixel at the gray scale of the binding point, thereby obtaining the electrical characteristics of all the gray scales of the pixel value. It can be understood that, generally, the electrical characteristic values of all gray levels of the first pixel 1222 need to be acquired. The display assembly 100 of the embodiment of the present application derives the electrical characteristic values of the other gray scales by binding the electrical characteristic values of the first pixels 1222 of the gray scales, so that it is not necessary to detect the electrical characteristic values of all gray scales of the first pixels 1222, thereby Improve the efficiency of detection.

In some embodiments, the compensation module 30 is used to update the adjustment value according to the compensation value.

In this way, the adjustment value is updated. Specifically, the compensation module 30 replaces the adjustment value with the sum of the adjustment value and the compensation value. It can be understood that the adjustment value is pre-stored in the memory of the display component 100 for the display component 100 to use when compensating pixels. However, the adjustment value before the current pixel is reused cannot achieve the ideal display quality. Therefore, the adjustment value Update, add the compensation value on the basis of the adjustment value, so that the subsequent pixels will achieve the ideal display quality after the compensation of the adjustment value.

Referring to FIGS. 2, 10 and 11, in some embodiments, the compensation module 30 includes a digital-to-analog converter DAC, a data distributor DMUX, and a first switch SW1, and the sensing module 20 includes an analog-to-digital converter ADC, a first Two switches SW2 and a third switch SW3; the analog-to-digital converter ADC is connected to the first end of the second switch SW2, the second end of the second switch SW2 is connected to the first pixel 1222; the first end of the third switch SW3 is connected to the reference voltage, The second terminal of the third switch SW3 is connected to the second terminal of the second switch SW2; the first switch SW1 is connected to the output terminal of the digital-to-analog converter DAC and the input terminal of the data distributor DMUX, and the output terminal of the data distributor DMUX is connected to the first Pixel 1222 and second pixel 1224.

In this way, the circuit architecture of the pixel block 122 is realized. Specifically, after sensing the electrical characteristic values of the two first pixels 1222, the sensing module 20 converts the analog signal of the electrical characteristic value into a digital signal of the electrical characteristic value through an analog-to-digital converter ADC, thereby realizing the electrical characteristic value Access. The compensation module 30 calculates the electrical characteristic value of the pixel block 122 according to the electrical characteristic values of the two first pixels 1222, and then calculates the compensation value, and then converts the digital signal of the compensation value into the simulation of the compensation value through the digital-to-analog converter DAC The signal and the analog signal of the compensation value are provided to the data distributor DMUX, so that the data distributor DMUX transmits the analog signal of the compensation value to each of the first pixel 1222 and the second pixel 1224.

In addition, in the embodiment of the present application, whether the analog-to-digital converter ADC and the reference voltage are connected to the first pixel 1222 is controlled by the second switch SW2 and the third switch SW3, thereby controlling the power of the sensing module 20 to the two first pixels 1222 Sensing of characteristic values. The first switch SW1 controls whether the digital-to-analog converter DAC and the data distributor DMUX are connected, thereby controlling the compensation and driving of the two first pixels 1222 and the second pixels 1224 by the compensation module 30.

Specifically, FIG. 11 is a control timing chart of each element in FIG. 10, and each element in FIG. 10 works according to the timing chart, so as to realize the sensing and control of the electrical characteristic values of the two first pixels 1222 by the sensing module 20 The compensation module 30 compensates and drives the two first pixels 1222 and the second pixels 1224.

Please refer to FIG. 12 together. In some embodiments, the display screen 10 includes a driving module 40, and the first pixel 1222 includes a first transistor T1, a second transistor T2, a third transistor DT, a capacitor C, and a light-emitting diode d; The gate of a transistor T1 is connected to the driving module 40 to receive the first switching signal sent by the driving module 40, the drain of the first transistor T1 is connected to the data distributor, and the source of the first transistor T1 is connected to the gate of the third transistor DT and The first end of the capacitor C; the gate of the second transistor T2 is connected to the driving module 40 to receive the second switching signal sent by the driving module 40, the drain of the second transistor T2 is connected to the sensing module 20, and the source of the second transistor T2 Connect the anode of the light-emitting diode d, the second end of the capacitor C and the drain of the third transistor DT; the drain of the third transistor DT is connected to the second end of the capacitor C, the anode of the light-emitting diode d and the source of the second transistor T2 The source of the third transistor DT is connected to the positive voltage VDD of the power supply; the cathode of the light emitting diode d is connected to the negative voltage VSS of the power supply.

In this way, the circuit architecture within the pixel is realized. Please note that in FIG. 10, each of the first pixel 1222 and the second pixel 1224 includes three sub-pixels, and the three sub-pixels may be a red sub-pixel, a green sub-pixel, and a blue sub-pixel. FIG. 12 is an internal circuit structure of one sub-pixel in the first pixel 1222.

Please note that in some other embodiments, the first pixel 1222 and the second pixel 1224 may also include four sub-pixels, such as a red sub-pixel, a green sub-pixel, a blue sub-pixel, and a white sub-pixel. In other other embodiments, the first pixel 1222 and the second pixel 1224 may also include two sub-pixels, such as a red sub-pixel and a blue sub-pixel. Here, the number and specific forms of the sub-pixels in the first pixel 1222 and the second pixel 1224 are not limited.

It should be understood that each part of the present application may be implemented by hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods may be performed using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if it is executed by hardware, as in another embodiment, it can be executed by any one or a combination of the following techniques known in the art: a logic gate circuit for performing a logic function on a data signal Discrete logic circuits, dedicated integrated circuits with appropriate combinational logic gates, programmable gate arrays (PGA), field programmable gate arrays (FPGA), etc.

Those of ordinary skill in the art can understand that performing all or part of the steps carried by the above-described implementation method can be accomplished by a program instructing relevant hardware. The program can be stored in a computer-readable storage medium, and the program is being executed , Including one of the steps of the method embodiment or a combination thereof.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The above-mentioned integrated modules may be executed in the form of hardware or software function modules. If the integrated module is executed in the form of a software function module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk. Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be construed as limitations to the present application, and those of ordinary skill in the art may understand the above within the scope of the present application The embodiments are changed, modified, replaced, and modified.

Claims

A display assembly is characterized by comprising a display screen, a sensing module and a compensation module. The display screen includes a pixel array. The pixel array includes a plurality of pixel blocks, and each of the pixel blocks includes a first pixel and a Two pixels, the first pixel is connected to the sensing module, the sensing module is used to detect the electrical characteristic value of the first pixel, and the compensation module is used to The characteristic value calculates the compensation value of the pixel block, and drives the first pixel and the second pixel according to the compensation value.
The display assembly according to claim 1, wherein the compensation module is configured to calculate the electrical characteristic value of the pixel block according to the electrical characteristic value of the first pixel, and according to the electrical characteristic value of the pixel block Calculate the compensation value of the pixel block with the grayscale adjustment value pre-stored in the display component.
The display assembly according to claim 2, wherein the compensation module is configured to use an average value of electrical characteristic values of all the first pixels in each pixel block as the electrical characteristic of the pixel block value.
The display assembly according to claim 1, wherein the sensing module is configured to detect the electrical characteristic value of the first pixel according to a preset gray level of the binding point.
The display assembly according to claim 2, wherein the compensation module is configured to update the adjustment value according to the compensation value.
The display assembly according to claim 2, wherein the electrical characteristic value of the first pixel includes a current value and/or voltage value, and the electrical characteristic value of the pixel block includes a current value and/or voltage value, so The compensation value includes a voltage value.
The display assembly according to claim 1, wherein the pixel block includes n pixels, the number of the first pixels is nk, the number of the second pixels is k, and n and k are positive It is an integer and nk is greater than or equal to 1.
The display assembly of claim 1, wherein the compensation module includes a digital-to-analog converter, a data distributor, and a first switch, and the sensing module includes an analog-to-digital converter, a second switch, and a third switch ;

The analog-to-digital converter is connected to the first end of the second switch, and the second end of the second switch is connected to the first pixel;

The first end of the third switch is connected to the reference voltage, and the second end of the third switch is connected to the second end of the second switch;

The first switch is connected to the output terminal of the digital-to-analog converter and the input terminal of the data distributor, and the output terminal of the data distributor is connected to the first pixel and the second pixel.
The display assembly according to claim 8, wherein the display screen includes a driving module, and the first pixel includes a first transistor, a second transistor, a third transistor, a capacitor, and a light emitting diode;

The gate of the first transistor is connected to the drive module to receive the first switching signal sent by the drive module, the drain of the first transistor is connected to the data distributor, and the source of the first transistor is connected The gate of the third transistor and the first end of the capacitor;

The gate of the second transistor is connected to the driving module to receive the second switching signal sent by the driving module, the drain of the second transistor is connected to the sensing module, and the source of the second transistor is connected An anode of the light emitting diode, a second end of the capacitor, and a drain of the third transistor;

The drain of the third transistor is connected to the second end of the capacitor and the anode of the light emitting diode and the source of the second transistor, and the source of the third transistor is connected to the positive voltage of the power supply;

The cathode of the light emitting diode is connected to the negative voltage of the power supply.
An electronic device, characterized by comprising a main board and the display assembly according to any one of claims 1-9, the main board being connected to the display assembly.