CN113168812A

CN113168812A - Display module and electronic device

Info

Publication number: CN113168812A
Application number: CN201880097653.2A
Authority: CN
Inventors: 刘洋; 聂廷书
Original assignee: Shenzhen Royole Technologies Co Ltd
Current assignee: Shenzhen Royole Technologies Co Ltd
Priority date: 2018-12-14
Filing date: 2018-12-14
Publication date: 2021-07-23
Also published as: WO2020118658A1

Abstract

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 with the sensing module (20), the sensing module (20) is used for detecting an electrical characteristic value of the first pixel (1222), and the compensation module (30) is used for calculating a compensation value of the pixel block (122) according to the electrical characteristic value of each first pixel (1222) and driving the first pixel (1222) and the second pixel (1224) according to the compensation value.

Description

Display module and electronic device

Technical Field

The present disclosure relates to display technologies, and particularly to a display module and an electronic device.

Background

A related art Organic Light-Emitting Diode (OLED) display is generally driven by a Thin Film Transistor (TFT). However, as the use time is prolonged, physical characteristics of the TFT and the OLED are shifted and deteriorated, such as changes in the threshold voltage and electron mobility of the TFT and the aging of the OLED, which gradually deteriorates image display quality.

Disclosure of Invention

The embodiment of the application provides a display assembly and an electronic device.

The display assembly of the embodiment of the application comprises a display screen, a sensing module and a compensation module, wherein the display screen comprises a pixel array, the pixel array comprises a plurality of pixel blocks, each pixel block comprises a first pixel and a second pixel, the first pixel is connected with the sensing module, the sensing module is used for detecting the electrical characteristic value of the first pixel, the compensation module is used for calculating the compensation value of the pixel block according to the electrical characteristic value of each first pixel and driving the first pixel and the second pixel according to the compensation value.

The electronic device of the embodiment of the application comprises a main board and the display assembly of the embodiment, wherein the main board is connected with the display assembly.

In the display module and the electronic device in the embodiment of the application, the compensation values of the first pixel and the second pixel are calculated through the electrical characteristic value of the first pixel, so that the wiring and the pins of the second pixel and the sensing module can be reduced while the image display quality is ensured after the display module is used for a long time, the aperture ratio of the display screen is improved, and the storage resource of the display module is saved.

Additional aspects and advantages of embodiments of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of embodiments of the present application.

Drawings

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

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

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

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

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

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

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

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

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

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

Fig. 10 is a schematic circuit architecture diagram of a pixel block of the pixel array of fig. 2.

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

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

The main reference numbers:

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

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative and are only for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, it is to be understood that the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

Referring to fig. 1, an electronic device 1000 is further provided in the present embodiment, where the electronic device 1000 includes a main board 200 and a display module 100, and the main board 200 is connected to the display module 100.

The main board 200 may input a corresponding image data signal to the display module 100. The display assembly 100 may process and display an input image signal. The electronic device 1000 according to the embodiment of the present disclosure includes, but is not limited to, a display, a mobile phone, a tablet computer, a notebook computer, an electronic book, a television, and a wearable smart device.

Referring to fig. 2, a display device 100 is provided according to an embodiment of the present disclosure. The display assembly 100 includes a display screen 10, a sensing module 20, and a compensation module 30, the display screen 10 including a pixel array 12, the pixel array 12 including a plurality of pixel blocks 122, each pixel block 122 including a first pixel 1222 and a second pixel 1224, the first pixel 1222 coupled to the sensing module 20, the sensing module 20 for detecting an electrical characteristic value of the first pixel 1222, the compensation module 30 for calculating a compensation value of the pixel block 122 based on the electrical characteristic value of each first pixel 1222 and driving the first pixel 1222 and the second pixel 1224 based on the compensation value.

In the display module 100 and the electronic device 1000 according to the embodiment of the application, the compensation values of the first pixel 1222 and the second pixel 1224 are calculated according to the electrical characteristic value of the first pixel 1222, so that the trace and the pin of the second pixel 1224 and the sensing module 20 can be reduced while the image display quality is ensured after a long time use, thereby improving the aperture ratio of the display screen 10 and saving the memory resource of the display module 100.

Specifically, the aperture ratio is a ratio between an area of a light passing portion excluding the wiring portion and the transistor portion for each sub-pixel and an area of the entire sub-pixel. It can be understood that the higher the aperture ratio is, the higher the efficiency of light passing through is, and the wiring may block the pixel from emitting light. Therefore, in the embodiment of the present application, since the second pixel 1224 is not connected to the sensing module 20, the number of traces and pins of the second pixel 1224 and the sensing module 20 is reduced, and the shielding of the traces on the light emission of the second pixel 1224 is reduced, the aperture ratio of the second pixel 1224 can be increased.

In addition, since the sensing module 20 detects only 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 of the first pixels 1222 to drive the first pixel 1222 and the second pixel 1224 according to the compensation value, it is possible to save the storage resource of the display module 100 without storing the electrical characteristic value of the second pixel 1224 and without performing the calculation related to the electrical characteristic value of the second pixel 1224.

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

In this way, division of pixel blocks is achieved. Note that, since the pixel block 122 is too large, which easily causes the human eye to visually perceive the difference in the display effect between the display module 100 and the normal display module in the embodiment of the present application, the number of pixels in one pixel block 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 a block 122 of pixels are not adjacent, the span of the block 122 of pixels does not exceed the above range.

In addition, the display effect visually perceived by human eyes is also affected by the pixel density (Pixels Per inc, PPI) and the viewing distance of the user, and in the actual production process, the dividing mode of the pixel blocks, the pixel density and the viewing distance need to be 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, may all be in the same column, or may be in different rows and columns. The pixel array 12 may include one pixel block 122, or may include a plurality of pixel blocks 122, and when the pixel array 12 includes a plurality of pixel blocks 122, the composition and arrangement of each pixel in the plurality of pixel blocks 122 may be the same or different. The specific number, specific arrangement, and specific configuration of pixels in the pixel block 122 are not limited herein.

In one example, referring to fig. 2, the pixel block 122 includes 3 pixels located on the same row, the number of the first pixels 1222 is 2, the number of the second pixels 1224 is 1, one second pixel 1224 is spaced between two first pixels 1222, and the two first pixels 1222 are connected to the sensing module 20 through the sensing line 21.

In another example, referring to fig. 3, the pixel block 122 includes 2 pixels located on the same row, the number of the first pixels 1222 is 1, the number of the second pixels 1224 is 1, and the first pixels 1222 are connected to the sensing module 20 through the sensing line 21.

In yet another example, referring to fig. 4, the pixel block 122 includes 6 pixels located 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 are connected to the sensing module 20 through the sensing line 21.

In still another example, referring to fig. 5, the pixel block 122 includes 9 pixels 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 are connected to the sensing module 20 through the sensing line 21.

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 four first pixels 1222 are connected to the sensing module 20 by two sensing lines 21 in a crossing manner.

In yet another example, referring to fig. 7, the pixel block 122 includes 2 pixels in the same column, the number of the first pixels 1222 is 1, the number of the second pixels 1224 is 1, and the first pixels 1222 are connected to the sensing module 20 through the sensing line 21.

In still another example, referring to fig. 8, the pixel block 122 includes 2 pixels adjacent in a diagonal direction, the number of the first pixels 1222 is 1, the number of the second pixels 1224 is 1, and the first pixels 1222 are connected to the sensing module 20 through the sensing line 21.

In another example, referring to fig. 9, the pixel array 12 includes two pixel blocks 122, and the specific configuration of the pixels of the two pixel blocks 122 is different. Specifically, one pixel block 122 in the pixel array 12 includes 3 pixels located in one row, the number of the first pixels 1222 is 2, the number of the second pixels 1224 is 1, one second pixel 1224 is spaced between two first pixels 1222, and the two first pixels 1222 are connected to the sensing module 20 through one sensing line 21. Another block 122 of pixels in the pixel array 12 includes 6 pixels in two rows, the first pixels 1222 is 4 in number, the second pixels 1224 are 2 in number, and the first pixels 1222 are connected to the sense module 20 by another sense line 21.

Note that the above examples are merely examples and do not represent limitations on the division of the pixel block 122 and the formation of the first pixel 1222 and the second pixel 1224 in the pixel block 122.

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

In this manner, determination of the compensation values for the pixel blocks 122 is achieved. Specifically, in the example of fig. 2, the pixel block 122 includes two first pixels 1222 and one second pixel 1224, and the two first pixels 1222 are spaced by the one second pixel 1224, and each first pixel 1222 is connected to the sensing module 20 by a 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 acquired by the sensing module 20, and then calculates the difference between the electrical characteristic value of the pixel block 122 and the pre-stored gray scale adjustment value, thereby obtaining the compensation value of the pixel block 122. After the compensation values are obtained, the compensation values are compensated for two first pixels 1222 and one second pixel 1224. That is, the compensation values are compensated for both the two first pixels 1222 and the one second pixel 1224 on the basis of the pre-stored gray scale adjustment values, so that both the two first pixels 1222 and the one second pixel 1224 reach the electrical characteristic value of the pixel block 122.

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

Thus, calculation of the electrical characteristic value of the pixel block 122 from the electrical characteristic value of the first pixel 1222 is achieved. In the example of fig. 2, the pixel block 122 includes two first pixels 1222 and one second pixel 1224, and the two first pixels 1222 are spaced apart by the one second pixel 1224, and each first pixel 1222 is connected to the sensing module 20 by a sensing line 21. The compensation module 30 acquires the electrical characteristic values of the two first pixels 1222 through the sensing module 20, calculates an average value of the electrical characteristic values of the two first pixels 1222, and takes the calculated average value as the electrical characteristic value of the pixel block 122.

Of course, in other embodiments, all of the first pixels 1222 in the pixel block 122 may be weighted differently and then weighted averaged. The weight may be determined according to the distance of each first pixel 1222 from the second pixel 1224. Here, a specific manner of calculating the electrical characteristic value of the pixel block 122 from 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 a voltage value, the electrical characteristic value of the pixel block 122 includes a current value and/or a voltage value, and the compensation value includes a voltage value.

In some embodiments, the sensing module 20 is configured to detect the electrical characteristic value of the first pixel 1222 according to a preset binding gray scale.

In this manner, detection of the electrical characteristic value of the first pixel 1222 is achieved. The binding point gray scale is selected from the gray scales, and the electrical characteristic values of the pixel in other gray scales can be deduced according to the electrical characteristic value of the pixel in the binding point gray scale, so that the electrical characteristic values of all the gray scales of the pixel are obtained. It is understood that, in general, it is necessary to acquire the electrical characteristic values of the entire gray scales of the first pixel 1222. In the display device 100 according to the embodiment of the present invention, the electrical characteristic values of the first pixels 1222 are tied to the gray levels, and the electrical characteristic values of the other gray levels are derived, so that it is not necessary to detect the electrical characteristic values of all the gray levels of the first pixels 1222, thereby improving the detection efficiency.

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

In this way, updating of the adjustment value is achieved. Specifically, the compensation module 30 replaces the adjustment value with the sum of the adjustment value and the compensation value. It is understood that the adjustment value is pre-stored in the memory of the display module 100 for the display module 100 to use when compensating the pixel, however, the adjustment value before the current pixel is reused cannot achieve the desired display quality, and therefore, the adjustment value needs to be updated, and the compensation value is added on the basis of the adjustment value, so that the pixel thereafter achieves the desired display quality after being compensated by the adjustment value.

Referring to fig. 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 second switch SW2 and a third switch SW 3; the analog-to-digital converter ADC is connected to a first terminal of the second switch SW2, and a second terminal of the second switch SW2 is connected to the first pixel 1222; a first terminal of the third switch SW3 is connected to the reference voltage, and a second terminal of the third switch SW3 is connected to a second terminal of the second switch SW 2; the first switch SW1 is connected to the output of the digital-to-analog converter DAC and to the input of the data divider DMUX, the output of which is connected to the first pixel 1222 and the second pixel 1224.

As such, the circuit architecture of the pixel block 122 is implemented. Specifically, after the sensing module 20 senses the electrical characteristic values of the two first pixels 1222, the analog signal of the electrical characteristic value is converted into a digital signal of the electrical characteristic value by the analog-to-digital converter ADC, so as to obtain the electrical characteristic value. 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, further calculates a compensation value, converts the digital signal of the compensation value into an analog signal of the compensation value through the digital-to-analog converter DAC and provides the analog signal of the compensation value to the data distributor DMUX, so that the data distributor DMUX transmits the analog signal of the compensation value to each of the first pixels 1222 and the second pixels 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 pixels 1222 is controlled by the second switch SW2 and the third switch SW3, so as to control the sensing of the electrical characteristic values of the two first pixels 1222 by the sensing module 20. Whether the digital-to-analog converter DAC and the data distributor DMUX are connected or not is controlled by the first switch SW1, 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 diagram of the elements in fig. 10, according to which the elements in fig. 10 operate, thereby realizing the sensing of the electrical characteristic values of the two first pixels 1222 by the sensing module 20, and the compensation and driving of the two first pixels 1222 and the second pixels 1224 by the compensation module 30.

Referring to fig. 12, in some embodiments, the display panel 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; a gate of the first transistor T1 is connected to the driving module 40 to receive the first switching signal sent by the driving module 40, a drain of the first transistor T1 is connected to the data distributor, and a source of the first transistor T1 is connected to a 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 is connected to 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 terminal of the capacitor C, the anode of the light emitting diode d, and the source of the second transistor T2, and 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 with the negative voltage VSS of the power supply.

Thus, a circuit architecture within the pixel is realized. Note that in fig. 10, each of the first pixel 1222 and the second pixel 1224 includes three sub-pixels, which may be a red sub-pixel, a green sub-pixel, and a blue sub-pixel. Fig. 12 is a circuit architecture of the inside of one sub-pixel in the first pixel 1222.

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 embodiments, the first pixel 1222 and the second pixel 1224 may include two sub-pixels, such as a red sub-pixel and a blue sub-pixel. The number and specific form of sub-pixels in the first pixel 1222 and the second pixel 1224 are not limited herein.

It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, various steps or methods may be performed by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for performing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.

It will be understood by those skilled in the art that all or part of the steps carried out in the above implementation method can be implemented by hardware related to instructions of a program, which can be stored in a computer readable storage medium, and the program, when executed, includes one or a combination of the steps of the method embodiment.

In addition, functional units in the embodiments 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 integrated module can be executed in the form of hardware or in the form of a software functional module. The integrated module, if executed in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.

The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.

Claims

A display assembly comprising a display screen, a sensing module and a compensation module, the display screen comprising a pixel array, the pixel array comprising a plurality of pixel blocks, each of the pixel blocks comprising a first pixel and a second pixel, the first pixel being connected to the sensing module, the sensing module being configured to detect an electrical characteristic value of the first pixel, the compensation module being configured to calculate a compensation value for the pixel block based on the electrical characteristic value of each of the first pixels and to drive the first pixel and the second pixel based on the compensation value.
The display assembly of claim 1, wherein the compensation module is configured to calculate the electrical property value of the pixel block based on the electrical property value of the first pixel and to calculate the compensation value of the pixel block based on the electrical property value of the pixel block and a pre-stored gray scale adjustment value of the display assembly.
The display assembly of claim 2, wherein the compensation module is to use an average of the electrical characteristic values of all of the first pixels in each of the pixel blocks as the electrical characteristic value of the pixel block.
The display assembly of claim 1, wherein the sensing module is configured to detect the electrical property value of the first pixel according to a predetermined binding gray scale.
The display assembly of claim 2, wherein the compensation module is to update the adjustment value according to the compensation value.
The display assembly of claim 2, wherein the electrical characteristic value of the first pixel comprises a current value and/or a voltage value, the electrical characteristic value of the pixel block comprises a current value and/or a voltage value, and the compensation value comprises a voltage value.
The display assembly of claim 1, wherein the block of pixels comprises n pixels, the number of first pixels is n-k, the number of second pixels is k, n and k are positive integers and n-k is greater than or equal to 1.
The display assembly of claim 1, wherein the compensation module comprises a digital-to-analog converter, a data distributor, and a first switch, the sensing module comprises an analog-to-digital converter, a second switch, and a third switch;

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

a first end of the third switch is connected with a reference voltage, and a second end of the third switch is connected with a second end of the second switch;

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

the grid electrode of the first transistor is connected with the driving module to receive a first switching signal sent by the driving module, the drain electrode of the first transistor is connected with the data distributor, and the source electrode of the first transistor is connected with the grid electrode of the third transistor and the first end of the capacitor;

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

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

and the cathode of the light emitting diode is connected with the negative voltage of the power supply.
An electronic device comprising a main board and the display module according to any one of claims 1 to 9, wherein the main board is connected to the display module.