A display panel and an electronic device

Abstract

Embodiments of the present application relate to the field of display technologies, and in particular, to a display panel and an electronic device. The display panel includes: a display area and a non-display area disposed around the display area; a plurality of photosensitive elements are provided in the non-display area, and the display area is divided into a plurality of display sub-areas; wherein, at least one display sub-area corresponds to at least one photosensitive element, and each photosensitive element is respectively configured to collect the ambient light luminance signal of the corresponding display sub-area; each photosensitive element is electrically connected to the display control circuit, and outputs the collected ambient light luminance signal of the corresponding display sub-area to the display control circuit; the display control circuit is configured to determine the target display luminance of each display sub-area based on the ambient light luminance signals of each display sub-area, and drive the display components of each display sub-area to perform display according to the corresponding target display luminance. The screen of the display panel can perform zoned display, ensuring that the contrast and color of the screen are not affected by ambient light.

Description

Technical Field

[0001] The present invention relates to the field of display technologies, and particularly to a display panel and an electronic device. Background Art

[0002] In order to save power consumption and improve the visual effect of a display device, electronic devices with a display function such as mobile phones and tablet products are generally equipped with a light sensor above the display screen. The light sensor can automatically adjust the screen brightness of the electronic device according to the ambient light brightness where the electronic device is located. However, when there is a difference in the light brightness on both sides of the electronic device, the screen brightness cannot be adjusted in a partitioned manner, reducing the user experience. Summary of the Invention

[0003] The purpose of the embodiments of the present invention is to provide a display panel and an electronic device to achieve partitioned modulation of the screen brightness and improve the user experience. The specific technical solutions are as follows:

[0004] In the first aspect of the embodiments of the present application, a display panel of an electronic device is provided. The display panel includes: a display area and a non-display area disposed around the display area; a plurality of photosensitive elements are disposed in the non-display area, and the display area is divided into a plurality of display sub-areas; wherein, at least one of the display sub-areas corresponds to at least one of the photosensitive elements, and each of the photosensitive elements is respectively used to collect the ambient light brightness signal of the corresponding display sub-area; each of the photosensitive elements is electrically connected to a display control circuit, and outputs the collected ambient light brightness signal of the corresponding display sub-area to the display control circuit; the display control circuit is used to determine the target display brightness of each of the display sub-areas based on the ambient light brightness signals of each of the display sub-areas, and drive the display components of each of the display sub-areas to display according to the corresponding target display brightness.

[0005] In this embodiment, a plurality of photosensitive elements are disposed in the non-display area. If the ambient light brightness signals sensed by each of the photosensitive elements are different, it means that the external ambient light brightness of different display sub-areas of the display panel is different. By setting a plurality of photosensitive elements, at least one display sub-area corresponds to at least one photosensitive element, and the display control circuit is used to determine the target display brightness of each of the display sub-areas based on the ambient light brightness signals collected by each of the photosensitive elements, and drive the display components of each of the display sub-areas to display according to the corresponding target display brightness, so as to achieve the purpose that the screen of the display panel can be displayed in a partitioned manner, so that the overall display effects of different display sub-areas of the display panel are consistent under different external ambient light intensities, ensuring that the contrast and color of the display panel are not affected by the ambient light, and effectively reducing reflection and anti-glare.

[0006] In addition, the display panel according to the embodiments of the present application may further have the following technical features:

[0007] In one embodiment, M photosensitive elements and N photosensitive elements are respectively arranged on at least one side in the length direction and at least one side in the width direction of the display area, where M and N are positive integers. The M photosensitive elements and the N photosensitive elements divide the display area into M*N display sub-areas. The intersection point of each photosensitive element on one side in the length direction and each photosensitive element on one side in the width direction is located within one of the display sub-areas to collect the ambient light luminance signals of the display sub-areas where the respective intersection points are located.

[0008] In one embodiment, each photosensitive element includes a first thin-film transistor. The first thin-film transistor collects the real ambient light luminance signal in real time and converts it into a current signal, which is output as a first ambient light luminance signal to the display control circuit. The display control circuit is configured to determine the target display luminance of each display sub-area based on the first ambient light luminance signals output by the respective photosensitive elements, and drive the display components of each display sub-area to display according to the corresponding target display luminance.

[0009] In one embodiment, each photosensitive element further includes a second thin-film transistor. A black matrix is provided on one side of the second thin-film transistor facing the direction of ambient light incidence, and the positive projection of the black matrix covers the second thin-film transistor, so that the second thin-film transistor collects the all-black ambient light luminance signal in real time and converts it into a current signal, which is output as a second ambient light luminance signal to the display control circuit. The display control circuit is configured to determine the target display luminance of each display sub-area based on the first ambient light luminance signals and the second ambient light luminance signals output by the respective photosensitive elements, and drive the display components of each display sub-area to display according to the corresponding target display luminance.

[0010] In one embodiment, the display panel further includes a bottom substrate and an upper glass substrate covering the display area and the non-display area. The plurality of photosensitive elements are arranged in the non-display area on the bottom substrate. Ambient light irradiates each photosensitive element through the upper glass substrate.

[0011] In one embodiment, the display control circuit includes a signal conversion sub-circuit and a control sub-circuit; the signal conversion sub-circuit is configured to convert the first ambient light luminance signals of the respective photosensitive elements or to convert the first ambient light luminance signals and the second ambient light luminance signals of the respective photosensitive elements into light flux digital signals, and output the maximum light flux among them as the ambient light reference together with other light fluxes to the control sub-circuit; the control sub-circuit is configured to be electrically connected to the main control system of the electronic device, obtain the target display luminance corresponding to each of the display sub-regions according to the ambient light reference and the current display image information, generate corresponding target pulse width modulation signals according to each target display luminance, and output each target pulse width modulation signal to the display components of each of the display sub-regions for image display.

[0012] In one embodiment, the signal conversion sub-circuit includes: a signal converter and an analog-to-digital converter; the signal converter is configured to convert the first ambient light luminance signals of the respective photosensitive elements into corresponding first voltage signals, or to convert the first ambient light luminance signals and the second ambient light luminance signals of the respective photosensitive elements into corresponding first voltage signals and second voltage signals; the analog-to-digital converter is configured to convert the first voltage signals of the respective photosensitive elements into corresponding first digital signals, calculate the light fluxes of the respective photosensitive elements based on the first digital signals of the respective photosensitive elements, output the maximum light flux among them as the ambient light reference together with other light fluxes to the control sub-circuit; or to convert the first voltage signals and the second voltage signals of the respective photosensitive elements into corresponding first digital signals and second digital signals; calculate the light fluxes of the respective photosensitive elements based on the difference between the first digital signals and the second digital signals of the respective photosensitive elements, and output the maximum light flux among them as the ambient light reference together with other light fluxes to the control sub-circuit.

[0013] In one embodiment, a first calibration value and a second calibration value are pre-stored in the analog-to-digital converter. Before converting the first voltage signals and the second voltage signals of the respective photosensitive elements into corresponding first digital signals and second digital signals, the analog-to-digital converter calibrates the first voltage signals and the second voltage signals based on the first calibration value and the second calibration value; converts the calibrated first voltage signals and second voltage signals; the first calibration value and the second calibration value are the first ambient light luminance signals and the second ambient light luminance signals collected by the first thin-film transistor and the second thin-film transistor in a completely dark environment.

[0014] In one embodiment, the control sub-circuit includes: a micro-control processor, a timing controller, and an LED driver; the micro-control processor is configured to send the received ambient light reference and other light fluxes to the main control system of the electronic device, so that the main control system determines a reference display brightness based on the ambient light reference, determines a target display brightness for each of the display sub-regions based on the ratio relationship between the other light fluxes and the ambient light reference, and outputs the result to the micro-control processor; the main control system is further configured to send timing control standard parameters generated based on the ambient light reference to the timing controller, the timing controller generates a standard timing control signal according to the timing control standard parameters, and the timing controller sends the standard timing control signal to the micro-control processor; the micro-control processor is further configured to receive the current display image information sent by the main control system, adjust the standard timing control signal sent by the timing controller based on the target display brightness of each of the display sub-regions to obtain a target timing control signal for each of the display sub-regions, and send the target timing control signal and the current display image information to the LED driver; the LED driver is configured to drive the display components of each of the display sub-regions to display the current display image according to the target timing control signal of each of the display sub-regions.

[0015] In one embodiment, each of the photosensitive elements is electrically connected to the display control circuit through at least one flexible circuit board.

[0016] A second aspect of the embodiments of the present application provides an electronic device including the display panel described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention, and those of ordinary skill in the art can also obtain other embodiments based on these drawings.

[0018] Figure 1 A top view structural schematic diagram of the display panel provided by the embodiments of the present application in one embodiment;

[0019] Figure 2 A structural schematic diagram for the first thin-film transistor and the second thin-film transistor to collect signals;

[0020] Figure 3 A perspective schematic diagram of the display panel provided by the embodiments of the present application from a non-display area top view perspective;

[0021] Figure 4 For Figure 3 a cross-sectional view taken along the A-A direction in

[0022] Figure 5 Schematic diagram for adjusting display brightness for photosensitive elements

[0023] Figure 6 Algorithm flowchart for signal acquisition and calibration of photosensitive elements

[0024] The reference numerals are as follows:

[0025] 1 - Display area; 2 - Non - display area; 21 - Photosensitive element, 211 - First thin - film transistor; 211a - Source electrode; 211b - Drain electrode; 211c - Gate electrode; 211d - Active layer; 212 - Second thin - film transistor; 212a - Black matrix; 22 - Driver IC chip; 23 - Flexible circuit board; 3 - Bottom substrate; 4 - Upper glass substrate; 5 - Printed circuit board; 51 - Display control circuit; 511 - Signal converter; 512 - Analog - to - digital converter; 513 - Micro - control processor; 514 - Timing controller; 515 - LED driver; 6 - Insulating layer; 7 - Adhesive layer; 8 - Main control system; C1 - First current signal; C2 - Second current signal; V1 - First voltage signal; V2 - Second voltage signal; L - Length direction; W - Width direction. Specific embodiments

[0026] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art based on the present application belong to the scope of protection of the present application.

[0027] In the first aspect of the embodiments of the present application, a display panel of an electronic device is provided. As Figure 1 shown, the display panel includes a display area 1 and a non - display area 2 disposed around the display area 1. The non - display area 2 is provided with a plurality of photosensitive elements 21, and the display area 1 is divided into a plurality of display sub - areas. Among them, at least one display sub - area corresponds to one photosensitive element 21, and each photosensitive element 21 is respectively used to collect the ambient light brightness signal of the corresponding display sub - area. Each photosensitive element 21 is electrically connected to the display control circuit 51, and outputs the collected ambient light brightness signal of the corresponding display sub - area to the display control circuit 51. The display control circuit 51 is used to determine the target display brightness of each display sub - area based on the ambient light brightness signals of each display sub - area, and drive the display components of each display sub - area to display according to the corresponding target display brightness.

[0028] In this embodiment, a plurality of photosensitive elements 21 are disposed in the non-display area 2. If the ambient light luminance signals sensed by the respective photosensitive elements 21 are different, it means that the ambient light luminance of different display sub-areas of the display panel is different. By providing a plurality of photosensitive elements 21, one display sub-area corresponds to at least one photosensitive element 21. The display control circuit 51 is configured to determine the target display luminance of each display sub-area based on the ambient light luminance signals collected by the respective photosensitive elements 21, and drive the display components of each display sub-area to perform display according to the corresponding target display luminance, so as to achieve the purpose that the screen of the display panel can be partitioned for display, so that the overall display effects of different display sub-areas of the display panel are consistent under different ambient light intensities, ensuring that the contrast and color of the display panel are not affected by the ambient light, and effectively reducing reflection and anti-glare.

[0029] In some embodiments of the present application, as Figure 1 shown, M photosensitive elements 21 and N photosensitive elements 21 are respectively disposed on at least one side in the length direction L and at least one side in the width direction W of the display area 1. M and N are positive integers. For example, M can be positive integers such as 2, 3, 4, etc., and N can be positive integers such as 2, 3, 4, 5, etc. Since one side in the width direction W of the display area 1 is the length direction L of the display panel and the distance is relatively large, N is generally a positive integer greater than M. The M photosensitive elements 21 and the N photosensitive elements 21 divide the display area 1 into M×N display sub-areas. The intersection point of each photosensitive element 21 on one side in the length direction L and each photosensitive element 21 on one side in the width direction W is located in one of the display sub-areas to collect the ambient light luminance signal of the display sub-area where each intersection point is located.

[0030] In this embodiment, the non-display area 2 is disposed around the periphery of the display area 1. The non-display area 2 includes not only a plurality of photosensitive elements 21, but also a plurality of driving IC chips 22. The plurality of driving IC chips 22 are electrically connected to the display area 1 and are configured to drive the display area 1 to perform display according to a certain timing. Disposing M photosensitive elements 21 on at least one side in the length direction L of the display area 1 means that M photosensitive elements 21 can be disposed on one side, or M photosensitive elements 21 can be disposed on both sides at the same time. Disposing N photosensitive elements 21 on at least one side in the width direction W of the display area 1 means that N photosensitive elements 21 can be disposed on one side, or N photosensitive elements 21 can be disposed on both sides at the same time.

[0031] Specifically, as Figure 1As shown, two photosensitive elements 21 are simultaneously arranged on both sides of the length direction L of the display area 1, and three photosensitive elements 21 are arranged on one side of the width direction W of the display area 1. The two photosensitive elements 21 and the three photosensitive elements 21 divide the display area 1 into 2×3 display sub-areas, and the intersection point of each photosensitive element 21 on one side of the length direction L and each photosensitive element 21 on one side of the width direction W is located in one of the display sub-areas. In order to simplify the wiring method and shorten the wiring distance, the display brightness of each display sub-area is jointly controlled by the photosensitive element 21 on one side of the length direction L closest to its position and the photosensitive element 21 on one side of the width direction W, and the ambient light brightness signal of the display sub-area is collected. The distance between both sides of the length direction L of the display area 1 is relatively far, so the external ambient light brightness will also change greatly. By arranging two photosensitive elements 21 on both sides respectively, the matching degree between the collected ambient light brightness signal and the actual brightness of the display sub-area to be controlled is improved.

[0032] Furthermore, the photosensitive element 21 on one side of the length direction L and the photosensitive element 21 on one side of the width direction W jointly control one display sub-area, and signals are collected from two positions of the display sub-area respectively, which can improve the determination accuracy of the external ambient light brightness, thereby improving the accuracy of zoned display.

[0033] In another embodiment, M photosensitive elements 21 can be arranged only on one side of the length direction L of the display area 1, and N photosensitive elements 21 can be arranged only on one side of the width direction W of the display area 1.

[0034] Specifically, as Figure 1 shown, in some embodiments of the present application, each photosensitive element 21 includes a first thin-film transistor 211; the first thin-film transistor 211 collects the real ambient light brightness signal in real time and converts it into a current signal, and outputs it to the display control circuit 51 as the first ambient light brightness signal. The display control circuit 51 is used to determine the target display brightness of each display sub-area based on the first ambient light brightness signals output by each photosensitive element 21, and drive the display components of each display sub-area to display according to the corresponding target display brightness.

[0035] In this embodiment, using the first thin-film transistor 211 as the photosensitive element 21 to collect the ambient light brightness signal is convenient for integrating the first thin-film transistor 211 on the display panel without separately reserving space for the photosensitive element 21, which is beneficial to the narrow border design of the display panel.

[0036] More specifically, as Figure 1 、 Figure 2As shown, each photosensitive element 21 further includes a second thin film transistor 212; a black matrix 212a is provided on one side of the second thin film transistor 212 facing the incident direction of ambient light, and the orthographic projection of the black matrix 212a on the second thin film transistor 212 covers the second thin film transistor 212, so that the second thin film transistor 212 can collect the full black ambient light luminance signal in real time and convert it into a current signal, which is output to the display control circuit 51 as the second ambient light luminance signal. The display control circuit 51 is configured to determine the target display luminance of each display sub-region based on the first ambient light luminance signal and the second ambient light luminance signal output by each photosensitive element 21, and drive the display components of each display sub-region to display according to the corresponding target display luminance.

[0037] In this embodiment, each photosensitive element 21 further includes a second thin film transistor 212, and the upper part of the second thin film transistor 212 is blocked by the black matrix 212a, that is, the second thin film transistor 212 serves as a full black control group to collect the full black ambient light luminance signal and convert it into a current signal, which is used as the second ambient light luminance signal. The display control circuit 51 determines the target display luminance of each display sub-region based on the first ambient light luminance signal and the second ambient light luminance signal collected by the first thin film transistor 211 and the second thin film transistor 212. The second ambient light luminance signal collected by the second thin film transistor 212 can play a certain calibration role on the first ambient light luminance signal, thereby further improving the accuracy of the target display luminance determined by the display control circuit 51, enabling the display panel to perform precise zoned display and ensuring that the contrast and color of the display panel are not affected by ambient light.

[0038] More specifically, as Figure 3 、 Figure 4 shown, the display panel further includes: a bottom substrate 3 and an upper glass substrate 4 covering the display area 1 and the non-display area 2; a plurality of photosensitive elements 21 are disposed in the non-display area 2 on the bottom substrate 3; the ambient light irradiates each photosensitive element 21 through the upper glass substrate 4.

[0039] In this embodiment, as Figure 4As shown, only taking the first thin-film transistor 211 as an example, the layer structure of the non-display area 2 of the display panel is shown. A plurality of photosensitive elements 21 are all arranged on the bottom substrate 3, so that the plurality of photosensitive elements 21 can be arranged on the same layer as the thin-film transistors in the display area 1 of the display panel, further simplifying the structure of the display panel. Different from the display area 1, no other light-emitting elements are arranged above the photosensitive elements 21 in the non-display area 2. Between the photosensitive elements 21 and the upper glass substrate 4, it can be filled with transparent glue to cover and encapsulate the photosensitive elements 21, so that ambient light can pass through the upper glass substrate 4 and the intermediate transparent glue layer 7 and irradiate on the photosensitive elements 21. Among them, the substrate can be a glass substrate, made of the same material as the upper glass substrate 4, or the substrate can also be a substrate deposited with polyimide material.

[0040] Among them, the first thin-film transistor 211 and the second thin-film transistor 212 both include a gate 211c and an active layer 211d arranged on the bottom substrate 3, and a source electrode 211a and a drain electrode 211b electrically connected to the active layer 211d. The gate 211c and the active layer 211d are spaced apart by an insulating layer 6. The gate 211c is Figure 5 G1 and G2 shown in, where the source electrode 211a of the first thin-film transistor 211 and the second thin-film transistor 212 is electrically connected to the source signal, and one electrode electrically connected to the converter is the drain electrode 211b of the first thin-film transistor 211 and the second thin-film transistor 212. When G1 and G2 are turned on, an induced current, that is, the first current and the second current, is formed between the source electrode 211a and the drain electrode 211b.

[0041] In some embodiments of the present application, as Figure 1 , Figure 5 shown, the display control circuit 51 includes a signal conversion sub-circuit and a control sub-circuit. The signal conversion sub-circuit is used to convert the first ambient light luminance signal of each photosensitive element 21 or to convert the first ambient light luminance signal and the second ambient light luminance signal of each photosensitive element 21 into a light flux digital signal, and output the maximum light flux digital signal as the ambient light reference and other light flux digital signals to the control sub-circuit together. The control sub-circuit is used to be electrically connected to the main control system 8 of the electronic device, obtain the target display luminance corresponding to each display sub-region according to the ambient light reference and the current display image information, generate corresponding target pulse width modulation signals according to each target display luminance, and output each target pulse width modulation signal to the display components of each display sub-region for image display.

[0042] In this embodiment, when the photosensitive element 21 only includes the first thin-film transistor 211, the signal conversion sub-circuit is configured to convert the first ambient light luminance signal collected by the first thin-film transistor 211 into a luminous flux digital signal, and output the maximum luminous flux digital signal among them as the ambient light reference together with other luminous flux digital signals to the control sub-circuit. The control sub-circuit gives the target display luminance corresponding to each display sub-region according to the ambient light reference and the current display image information, generates corresponding pulse width modulation signals according to each target display luminance, and outputs the pulse width modulation signals to the display components of each display sub-region for image display.

[0043] When the photosensitive element 21 includes the first thin-film transistor 211 and the second thin-film transistor 212, the signal conversion sub-circuit is configured to convert the first ambient light luminance signal collected by the first thin-film transistor 211 and the second ambient light luminance signal collected by the second thin-film transistor 212 into luminous flux digital signals, and output the maximum luminous flux digital signal among them as the ambient light reference together with other luminous flux digital signals to the control sub-circuit. The control sub-circuit gives the target display luminance corresponding to each display sub-region according to the ambient light reference and the current display image information, generates corresponding pulse width modulation signals according to each target display luminance, and outputs the pulse width modulation signals to the display components of each display sub-region for image display.

[0044] Further, as Figure 1 , Figure 5 shown, the signal conversion sub-circuit includes: a signal converter 511 (Switch, SW) and an analog-to-digital converter 512 (Analog to digital converter, ADC). The signal converter 511 is configured to convert the first ambient light luminance signal of each photosensitive element 21 into a corresponding first voltage signal V1, or convert the first ambient light luminance signal and the second ambient light luminance signal of each photosensitive element 21 into corresponding first voltage signal V1 and second voltage signal V2. As a feasible embodiment, the signal converter 511 can be an operational amplifier, which can convert the first ambient light luminance signal output in the form of current into the first voltage signal V1 on the one hand, and can also amplify the first ambient light luminance signal on the other hand, or convert the first ambient light luminance signal and the second ambient light luminance signal output in the form of current into the first voltage signal V1 and the second voltage signal V2, and amplify the first voltage signal V1 and the second voltage signal V2. The operational amplifier is a circuit unit with a relatively high amplification factor.

[0045] The analog-to-digital converter 512 is used to convert the first voltage signal V1 of each photosensitive element 21 into a corresponding first digital signal. Based on the first digital signals of each photosensitive element 21, the luminous flux of each photosensitive element 21 is calculated, and the maximum luminous flux is used as the ambient light reference and output to the control sub-circuit together with other luminous fluxes; or, it is used to convert the first voltage signal V1 and the second voltage signal V2 of each photosensitive element 21 into corresponding first digital signals and second digital signals; based on the difference between the first digital signal and the second digital signal of each photosensitive element 21, the luminous flux of each photosensitive element 21 is calculated, and the maximum luminous flux is used as the ambient light reference and output to the control sub-circuit together with other luminous fluxes.

[0046] The analog-to-digital converter 512 calculates the luminous flux of each photosensitive element 21, obtains the maximum luminous flux value through interpretation, and outputs the maximum luminous flux value as the ambient light reference to the control sub-circuit together with other luminous fluxes.

[0047] Through the signal converter 511 and the analog-to-digital converter 512, the first ambient light luminance signal or the first ambient light luminance signal and the second ambient light luminance signal collected by the photosensitive element 21 can be converted into digital signals that the control sub-circuit can interpret, and the control sub-circuit can easily adjust the backlight duty ratio according to the digital signals.

[0048] In some embodiments of the present application, as Figure 5 shown, a first calibration value and a second calibration value are pre-stored in the analog-to-digital converter 512. Before the analog-to-digital converter 512 converts the first voltage signal V1 and the second voltage signal V2 of each photosensitive element 21 into corresponding first digital signals and second digital signals, based on the first calibration value and the second calibration value, the first voltage signal V1 and the second voltage signal V2 are calibrated; the calibrated first voltage signal V1 and second voltage signal V2 are converted. The first calibration value and the second calibration value are the first ambient light luminance signal and the second ambient light luminance signal collected by the first thin-film transistor 211 and the second thin-film transistor 212 in a completely dark environment.

[0049] The first calibration value and the second calibration value collected by the first thin-film transistor 211 and the second thin-film transistor 212 in a completely dark environment are used as zero calibration values in the burned IC, and are calibrated respectively before the first voltage signal V1 and the second voltage signal V2 of each photosensitive element 21 are converted into corresponding first digital signals and second digital signals, which can ensure the consistency of the display panel contrast.

[0050] The specific calibration process, as Figure 6As shown, first, the first thin-film transistor 211 and the second thin-film transistor 212 collect the first ambient light luminance signal P1 in a full-black environment, and the second thin-film transistor 212 collects the second ambient light luminance signal P2, which are recorded as the initial values (P1, P2). These values are used as the zero-point calibration values (P1’, P2’) in the burned IC and are pre-stored in the analog-to-digital converter 512. Then, the first thin-film transistor 211 collects the actual first ambient light luminance signal P1 in real time, and the second thin-film transistor 212 collects the second ambient light luminance signal P2 in a full-black environment. Calculate data = (P1 - P2), and calculate X = (P1 - P1’) - (P2 - P2’). The illuminance value Lux = F(X), and the Lux value is reported to the control sub-circuit, specifically to the microcontroller unit (MCU) 513 in the control sub-circuit.

[0051] In some embodiments of the present application, as Figure 1 、 Figure 5 shown, the control sub-circuit includes a microcontroller unit 513, a time controller (Tcon) 514, and an LED driver 515.

[0052] The microcontroller unit 513 is used to send the received ambient light reference and other light fluxes to the main control system 8 of the electronic device, so that the main control system 8 determines the reference display luminance based on the ambient light reference, determines the target display luminance of each display sub-region based on the ratio relationship between other light fluxes and the ambient light reference, and outputs it to the microcontroller unit 513.

[0053] Among them, the analog-to-digital converter 512 transmits the maximum light flux and other light flux values to the microcontroller unit 513 in the form of I2C. And the microcontroller unit 513 also sends the received ambient light reference and other light fluxes to the main control system 8 of the electronic device in the form of I2C.

[0054] The main control system 8 is also used to send the timing control standard parameters generated based on the ambient light reference to the time controller 514. The time controller 514 generates a standard timing control signal according to the timing control standard parameters, and the time controller 514 sends the standard timing control signal to the microcontroller unit 513.

[0055] The microcontroller unit 513 is also used to receive the current display image information sent by the main control system 8, adjust the standard timing control signal sent by the time controller 514 based on the target display luminance of each display sub-region to obtain the target timing control signal of each display sub-region, and send the target timing control signal and the current display image information to the LED driver 515.

[0056] An LED driver 515 is configured to drive the display components of each display sub-region to display the current display image according to the target timing control signals of each display sub-region.

[0057] In this embodiment, the main control system 8 is the main control system 8 of the electronic device, which can be understood as the central processing unit of the electronic device. It is used to control the picture to be displayed on the display panel, calculate and process the transmission signals sent by the micro-control processor 513, and input timing control information related to the display image information, etc.

[0058] As Figure 1 shown, the above signal conversion sub-circuit and control sub-circuit can be located on the same printed circuit board 5, thereby reducing the space occupied by the signal conversion sub-circuit and control sub-circuit. Specifically, each photosensitive element 21 is electrically connected to the display control circuit 51 through at least one flexible circuit board 23. As Figure 1 shown, each photosensitive element 21 is connected to the display control circuit 51 through two flexible circuit boards 23. Connecting the two through the flexible circuit board 23 can bend the display control circuit 51 to the back of the display panel, thereby reducing the border of the display panel.

[0059] In this embodiment, when the photosensitive element 21 is in accordance with Figure 1When arranged as shown and the display control circuit 51 is arranged on the printed circuit board 5 and electrically connected to each photosensitive element 21 through two flexible circuit boards 23, when the photosensitive intensities of each group of photosensitive elements 21 are different, for example, strong light on one side and weak light on the other side, the specific steps for adjusting the screen brightness in zones are as follows: S1: The photosensitive element 21 converts the first ambient light brightness signal and the second ambient light brightness signal into a first current signal C1 and a second current signal C2 and sends them to the signal converter 511; S2: The signal converter 511 converts the first current signal C1 and the second current signal C2 into a first voltage signal V1 and a second voltage signal V2 and sends them to the analog-to-digital converter 512. The analog-to-digital converter 512 makes judgments and calculations and outputs the maximum luminous flux received by the photosensitive element 21, which is used as the ambient light standard; S3: The analog-to-digital converter 512 outputs the maximum luminous flux as the ambient light reference and other luminous fluxes to the micro-control processor 513 in the form of I2C. The micro-control processor 513 adjusts the backlight duty cycle according to the current ambient light brightness; S4: The micro-control processor 513 sends the received ambient light reference and other luminous fluxes to the main control system 8 of the electronic device, that is, the front-end system, in the form of I2C; S5: The main control system 8 is used to send the received ambient light reference and other luminous fluxes to the main control system 8 of the electronic device in the form of PWMI, so that the main control system 8 determines the reference display brightness based on the ambient light reference, determines the target display brightness of each display sub-region based on the ratio relationship between other luminous fluxes and the ambient light reference, and outputs it to the micro-control processor 513; at the same time, the main control system 8 is also used to send the timing control standard parameters generated based on the ambient light reference to the timing controller 514 in the form of PWMI;

[0060] S6: The timing controller 514 generates a standard timing control signal according to the standard parameter of timing control. The timing controller 514 sends the standard timing control signal to the micro-control processor 513 in the form of PWMI. S7: The timing controller 514 is also used to receive the current display image information sent by the main control system 8. The current image information is the eDP information sent by the main control system 8. The timing controller 514 then sends the current image information to the micro-control processor 513. The micro-control processor 513, according to the signal in S4 and the maximum ambient light sensed, outputs a standard timing control signal, that is, the reference gray scale X, and based on the target display brightness of each display sub-region, adjusts the standard timing control signal sent by the timing controller 514 to obtain the target timing control signal of each display sub-region, that is, adjusts the output gray scale of SOUT, and outputs Xa / d, Xb / d, Xc / d, etc. respectively. S8: The micro-control processor 513 sends the target timing control signal of each display sub-region and the current image information, that is, the calculated pulse width modulation signal PWMO, to the LED driver 515. The LED driver 515 adjusts the screen brightness in different zones when the photosensitive intensity is different, effectively reducing reflection and anti-glare, and ensuring that the contrast and color of the screen are not affected by the ambient light.

[0061] In the second aspect of the embodiments of the present application, an electronic device is provided, including the display panel described above. Among them, the electronic device can be, but is not limited to, an electronic device with a display function such as a display, a tablet computer, a notebook, a television, a mobile phone, etc. In the electronic device in the embodiments of the present application, the display panel included can adjust the screen brightness in different zones when the photosensitive intensity is different at different positions of the screen, effectively reducing reflection and anti-glare, and ensuring that the contrast and color of the screen are not affected by the external ambient light.

[0062] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0063] Each embodiment in this specification is described in a related manner. For the same or similar parts among the embodiments, reference can be made to each other. Each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple. For the related parts, reference can be made to the corresponding description in the method embodiment.

[0064] The above are only the preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention are all included in the protection scope of the present invention.

Claims

1. A display panel of an electronic device, characterized in that, The display panel includes: a display area and a non-display area disposed around the display area; The non-display area is provided with a plurality of photosensitive elements, and the display area is divided into a plurality of display sub-areas; Wherein, at least one of the display sub-areas corresponds to at least one of the photosensitive elements, and each of the photosensitive elements is respectively configured to collect an ambient light luminance signal of the corresponding display sub-area; Each of the photosensitive elements is electrically connected to a display control circuit, and outputs the collected ambient light luminance signal of the corresponding display sub-area to the display control circuit; the display control circuit is configured to determine a target display luminance of each of the display sub-areas based on the ambient light luminance signals of each of the display sub-areas, and drive a display component of each of the display sub-areas to perform display according to the corresponding target display luminance; M photosensitive elements and N photosensitive elements are respectively disposed on at least one side in the length direction and at least one side in the width direction of the display area, M and N are positive integers, and the M photosensitive elements and the N photosensitive elements divide the display area into M*N display sub-areas, and an intersection point of each photosensitive element on one side in the length direction and each photosensitive element on one side in the width direction is located in one of the display sub-areas, so as to collect the ambient light luminance signal of the display sub-area where each intersection point is located.

2. The display panel according to claim 1, wherein Each of the photosensitive elements includes a first thin film transistor; the first thin film transistor collects a real ambient light luminance signal in real time and converts it into a current signal, and outputs it as a first ambient light luminance signal to the display control circuit; The display control circuit is configured to determine a target display luminance of each of the display sub-areas based on the first ambient light luminance signals output by each of the photosensitive elements, and drive a display component of each of the display sub-areas to perform display according to the corresponding target display luminance.

3. The display panel according to claim 2, wherein Each of the photosensitive elements further includes a second thin film transistor; A black matrix is disposed on a side of the second thin film transistor facing the incident direction of ambient light, and the black matrix covers the second thin film transistor in a front projection of the second thin film transistor, so that the second thin film transistor collects a full black ambient light luminance signal in real time and converts it into a current signal, and outputs it as a second ambient light luminance signal to the display control circuit; The display control circuit is configured to determine a target display luminance of each of the display sub-areas based on the first ambient light luminance signals and the second ambient light luminance signals output by each of the photosensitive elements, and drive a display component of each of the display sub-areas to perform display according to the corresponding target display luminance.

4. The display panel according to claim 3, wherein The display panel further includes: a bottom substrate and an upper glass substrate covering the display area and the non-display area; the plurality of photosensitive elements are disposed in the non-display area on the bottom substrate; ambient light irradiates each of the photosensitive elements through the upper glass substrate.

5. The display panel according to claim 2, wherein The display control circuit includes a signal conversion sub-circuit and a control sub-circuit; The signal conversion sub-circuit is configured to convert the first ambient light luminance signals of the respective photosensitive elements into digital light flux signals, and output the maximum light flux among them as the ambient light reference together with other light fluxes to the control sub-circuit; The control sub-circuit is configured to be electrically connected to the main control system of the electronic device, obtain the target display luminance corresponding to each display sub-region according to the ambient light reference and the current display image information, generate corresponding target pulse width modulation signals according to each target display luminance, and output each target pulse width modulation signal to the display components of each display sub-region for image display.

6. The display panel according to claim 3, characterized in that, The display control circuit includes a signal conversion sub-circuit and a control sub-circuit; The signal conversion sub-circuit is configured to convert the first ambient light luminance signals and the second ambient light luminance signals of the respective photosensitive elements into digital light flux signals, and output the maximum light flux among them as the ambient light reference together with other light fluxes to the control sub-circuit; The control sub-circuit is configured to be electrically connected to the main control system of the electronic device, obtain the target display luminance corresponding to each display sub-region according to the ambient light reference and the current display image information, generate corresponding target pulse width modulation signals according to each target display luminance, and output each target pulse width modulation signal to the display components of each display sub-region for image display.

7. The display panel according to claim 5, wherein The signal conversion sub-circuit includes: a signal converter and an analog-to-digital converter; The signal converter is configured to convert the first ambient light luminance signals of the respective photosensitive elements into corresponding first voltage signals, The analog-to-digital converter is configured to convert the first voltage signals of the respective photosensitive elements into corresponding first digital signals, calculate the light fluxes of the respective photosensitive elements based on the first digital signals of the respective photosensitive elements, and output the maximum light flux among them as the ambient light reference together with other light fluxes to the control sub-circuit.

8. The display panel according to claim 6, wherein The signal conversion sub-circuit includes: a signal converter and an analog-to-digital converter; The signal converter is configured to convert the first ambient light luminance signals and the second ambient light luminance signals of the respective photosensitive elements into corresponding first voltage signals and second voltage signals; The analog-to-digital converter is configured to convert the first voltage signals and the second voltage signals of the respective photosensitive elements into corresponding first digital signals and second digital signals; calculate the light fluxes of the respective photosensitive elements based on the difference between the first digital signals and the second digital signals of the respective photosensitive elements, and output the maximum light flux among them as the ambient light reference together with other light fluxes to the control sub-circuit.

9. The display panel according to claim 8, wherein The first calibration value and the second calibration value are pre-stored in the analog-to-digital converter. Before converting the first voltage signal and the second voltage signal of each photosensitive element into corresponding first digital signals and second digital signals, the analog-to-digital converter calibrates the first voltage signal and the second voltage signal based on the first calibration value and the second calibration value; and converts the calibrated first voltage signal and second voltage signal. The first calibration value and the second calibration value are the first ambient light luminance signal and the second ambient light luminance signal collected by the first thin-film transistor and the second thin-film transistor in a completely dark environment.

10. The display panel according to claim 5 or 6, characterized in that, The control sub-circuit includes: a micro-control processor, a timing controller, and an LED driver; The micro-control processor is configured to send the received ambient light reference and other light fluxes to the main control system of the electronic device, so that the main control system determines a reference display brightness based on the ambient light reference, determines a target display brightness of each display sub-region based on the ratio relationship between the other light fluxes and the ambient light reference, and outputs the result to the micro-control processor; The main control system is further configured to send timing control standard parameters generated based on the ambient light reference to the timing controller. The timing controller generates a standard timing control signal according to the timing control standard parameters, and the timing controller sends the standard timing control signal to the micro-control processor; The micro-control processor is further configured to receive the current display image information sent by the main control system, adjust the standard timing control signal sent by the timing controller based on the target display brightness of each display sub-region to obtain a target timing control signal for each display sub-region, and send the target timing control signal and the current display image information to the LED driver; The LED driver is configured to drive the display components of each display sub-region to display the current display image according to the target timing control signal of each display sub-region.

11. The display panel according to any one of claims 1-4, characterized in that Each photosensitive element is electrically connected to the display control circuit through at least one flexible circuit board.

12. An electronic device, characterized in that, A display panel according to any one of claims 1-11 is included.

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