CN115359767A - Display panel and electronic equipment - Google Patents

Abstract

The embodiment of the application relates to the technical field of display, in particular to a display panel and electronic equipment. 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; the display device comprises a display sub-region, a light sensing element and a control unit, wherein one display sub-region at least corresponds to one light sensing element, and each light sensing element is respectively used for collecting an ambient light brightness signal of the corresponding display sub-region; each photosensitive element is electrically connected with the display control circuit and outputs the collected ambient light brightness signals corresponding to the display sub-regions to the display control circuit; the display control circuit is used for determining the target display brightness of each display sub-region based on the ambient light brightness signal of each display sub-region and driving the display component of each display sub-region to display according to the corresponding target display brightness. The screen of the display panel can be displayed in a partition mode, and the contrast and the color of the screen are not affected by ambient light.

Description

Display panel and electronic equipment

Technical Field

The present invention relates to the field of display technologies, and in particular, to a display panel and an electronic device.

Background

In order to save power consumption and improve the visual effect of the display device, electronic devices with display functions, such as mobile phones and tablet products, are generally equipped with a light sensor above the display screen, and the light sensor can automatically adjust the screen brightness of the electronic device according to the ambient light brightness of the electronic device. However, when the brightness of the two sides of the electronic device is different, the brightness of the screen cannot be adjusted in a partition manner, and the user experience is reduced.

Disclosure of Invention

The embodiment of the invention aims to provide a display panel and electronic equipment, so as to realize partition modulation of screen brightness and improve user experience. The specific technical scheme is as follows:

a first aspect of an embodiment of the present application provides a display panel of an electronic device, where 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; the display sub-region at least corresponds to one photosensitive element, and each photosensitive element is respectively used for collecting an ambient light brightness signal corresponding to the display sub-region; each photosensitive element is electrically connected with the display control circuit and outputs the collected ambient light brightness signals corresponding to the display sub-regions to the display control circuit; the display control circuit is used for determining the target display brightness of each display sub-region based on the ambient light brightness signal of each display sub-region, and driving the display component of each display sub-region to display according to the corresponding target display brightness.

In this embodiment, the plurality of photosensitive elements are disposed in the non-display area, and when the plurality of photosensitive elements sense different ambient light luminance signals, the ambient light luminance signals represent that the ambient light luminance signals of different display sub-areas of the display panel are different. Through setting up a plurality of photosensitive elements, a show subregion and at least one photosensitive element corresponds, show control circuit and be used for the ambient light brightness signal based on each photosensitive element collection, confirm each and show the target display luminance of subregion, and drive each and show that the display unit of subregion shows according to the target display luminance that corresponds and show, thereby reach the purpose that display panel's screen can the subregion show, thereby make display panel's different show that the subregion is unanimous under the different condition of external environment light intensity, guarantee that display panel's contrast and color do not receive the influence of ambient light, effectively reduce the reflection and prevent dazzling light.

In addition, the display panel according to the embodiment of the present application may further have the following technical features:

in one embodiment, M number of the photosensitive elements and N number of the photosensitive elements are respectively disposed on at least one side of the display area in the length direction and at least one side of the display area in the width direction, where M and N are positive integers, the M number of the photosensitive elements and the N number of the photosensitive elements divide the display area into M × N number of the display sub-areas, and an intersection of the photosensitive element on each side of the length direction and the photosensitive element on each side of the width direction is located in one of the display sub-areas to collect an ambient light brightness signal of the display sub-area where each intersection is located.

In one embodiment, each of the light sensing elements includes a first thin film transistor; the first thin film transistor collects real environment light brightness signals in real time and converts the real environment light brightness signals into current signals, and the current signals are output to the display control circuit as first environment light brightness signals; the display control circuit is configured to determine target display brightness of each display sub-region based on the first ambient light brightness signal output by each photosensitive element, and drive the display component of each display sub-region to display according to the corresponding target display brightness.

In one embodiment, each of the photosensitive elements further includes a second thin film transistor; a black matrix is arranged on one side, facing the ambient light incidence direction, of the second thin film transistor, and the orthographic projection of the black matrix on the second thin film transistor covers the second thin film transistor, so that the second thin film transistor collects a full-black ambient light brightness signal in real time and converts the full-black ambient light brightness signal into a current signal which is output to the display control circuit as a second ambient light brightness signal; the display control circuit is configured to determine target display brightness of each display sub-region based on the first ambient light brightness signal and the second ambient light brightness signal output by each photosensitive element, and drive the display component of each display sub-region to display according to the corresponding target display brightness.

In one embodiment, the display panel further includes: a bottom substrate base plate and an upper glass base plate covering the display area and the non-display area; the plurality of photosensitive elements are arranged in the non-display area on the underlying substrate base plate; and ambient light is irradiated to each photosensitive element through the upper glass substrate.

In one embodiment, the display control circuit comprises a signal conversion sub-circuit and a control sub-circuit; the signal conversion sub-circuit is configured to convert the first ambient light signal of each of the photosensitive elements or the first ambient light luminance signal and the second ambient light luminance signal of each of the photosensitive elements into a light flux digital signal, and output a maximum light flux of the light flux digital signal to the control sub-circuit together with other light fluxes as an ambient light reference; the control sub-circuit is used for being electrically connected with a main control system of the electronic equipment, obtaining target display brightness corresponding to each display sub-region according to the ambient light reference and the current display image information, generating corresponding target pulse width modulation signals according to the target display brightness, and outputting the pulse width modulation signals of each target to the display component of each display sub-region for image display.

In one embodiment, the signal conversion sub-circuit comprises: a signal converter and an analog-to-digital converter; the signal converter is configured to convert the first ambient light brightness signal of each of the photosensitive elements into a corresponding first voltage signal, or convert the first ambient light brightness signal and the second ambient light brightness signal of each of the photosensitive elements into a corresponding first voltage signal and a corresponding second voltage signal; the analog-to-digital converter is configured to convert the first voltage signal of each light-sensing element into a corresponding first digital signal, calculate, based on the first digital signal of each light-sensing element, light flux of each light-sensing element, and output, to the control sub-circuit, the maximum light flux of the light-sensing elements as an ambient light reference together with other light fluxes; or, the first voltage signal and the second voltage signal of each light sensing element are converted into the corresponding first digital signal and second digital signal; and calculating the luminous flux of each photosensitive element based on the difference between the first digital signal and the second digital signal of each photosensitive element, and outputting the maximum luminous flux as an ambient light reference to the control sub-circuit together with other luminous fluxes.

In one embodiment, a first calibration value and a second calibration value are pre-stored in the analog-to-digital converter, and 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 before converting the first voltage signal and the second voltage signal of each of the light sensing elements into corresponding first digital signal and second digital signal; converting the calibrated first voltage signal and the calibrated second voltage signal; the first calibration value and the second calibration value are a first ambient light brightness signal and a second ambient light brightness signal acquired by the first thin film transistor and the second thin film transistor under a black-all environment.

In one embodiment, the control sub-circuit comprises: the system comprises a micro-control processor, a time sequence controller and an LED driver; the micro control processor is used for sending the received ambient light reference and other luminous fluxes to a main control system of the electronic equipment together, so that the main control system determines reference display brightness based on the ambient light reference, and determines target display brightness of each display sub-area based on a ratio relation between the other luminous fluxes and the ambient light reference and outputs the target display brightness to the micro control processor; the master control system is also used for generating a time sequence control standard parameter based on an ambient light reference and sending the time sequence control standard parameter to the time sequence controller, the time sequence controller generates a standard time sequence control signal according to the time sequence control standard parameter, and the time sequence controller sends the standard time sequence control signal to the micro control processor; the micro control processor is further configured to receive current display image information sent by the main control system, adjust a standard timing control signal sent by the timing controller based on target display brightness of each display sub-region to obtain a 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; and the LED driver is used for driving the display components of the display sub-regions to display the current display image according to the target time sequence control signal of each display sub-region.

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

A second aspect of the embodiments of the present application provides an electronic device, including the display panel described above.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other embodiments can be obtained by referring to these drawings.

Fig. 1 is a schematic top view of a display panel provided in an embodiment of the present application;

FIG. 2 is a schematic diagram of the first TFT and the second TFT for collecting signals;

fig. 3 is a schematic perspective view of a top view of a non-display area of a display panel according to an embodiment of the present disclosure;

FIG. 4 isbase:Sub>A cross-sectional view taken along A-A of FIG. 3;

FIG. 5 is a schematic diagram of the photosensitive device for adjusting display brightness;

FIG. 6 is a flow chart of an algorithm for light sensing element signal acquisition and calibration.

The reference numbers are as follows:

1-a display area; 2-a non-display area; 21-photosensitive element, 211-first thin film transistor; 211 a-source; 211 b-drain; 211 c-gate; 211 d-active layer; 212-a second thin film transistor; 212 a-black matrix; 22-drive IC chip; 23-a flexible circuit board; 3-a bottom substrate base plate; 4-upper glass substrate; 5-a printed circuit board; 51-display control circuitry; 511-signal converter; 512-analog-to-digital converter; 513-a micro-control processor; 514-a timing controller; 515-LED driver; 6-an insulating layer; 7-transparent glue layer; 8-a main control system; c1-first current signal; c2-second current signal; v1 — first voltage signal; v2 — a second voltage signal; l-length direction; w-width direction.

Detailed Description

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

In a first aspect, an embodiment of the present application provides a display panel of an electronic device, as shown in fig. 1, 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 light sensing elements 21, and the display area 1 is divided into a plurality of display sub-areas. One display sub-region corresponds to at least one photosensitive element 21, and each photosensitive element 21 is used for collecting an ambient light brightness signal corresponding to the display sub-region. Each photosensitive element 21 is electrically connected to the display control circuit 51, and outputs the collected ambient light brightness signal corresponding to the display sub-region to the display control circuit 51. The display control circuit 51 is configured to determine a target display brightness of each display sub-region based on the ambient light brightness signal of each display sub-region, and drive the display components of each display sub-region to display according to the corresponding target display brightness.

In the embodiment, the plurality of photosensitive elements 21 are disposed in the non-display area 2, and when the photosensitive elements 21 sense different ambient light brightness signals, the ambient light brightness signals represent different ambient light brightness of different display sub-areas of the display panel. Through setting up a plurality of photosensitive element 21, a display subregion corresponds with at least one photosensitive element 21, show control circuit 51 and be used for the ambient light signal based on each photosensitive element 21 gathers, confirm each target display luminance who shows the subregion, and drive each display subregion's display element and show according to the target display luminance that corresponds, thereby reach the purpose that display panel's screen can the subregion show, thereby make display panel's different display subregion whole display effect unanimous under the different condition of external environment light intensity, guarantee that display panel's contrast and color do not receive the influence of ambient light, effectively reduce the reflection and prevent dazzling light.

In some embodiments of the present application, as shown in fig. 1, M photosensitive elements 21 and N photosensitive elements 21 are respectively disposed on at least one side of the length direction L and at least one side of the width direction W of the display area 1, where M is a positive integer such as 2, 3, 4, etc., and N is a positive integer such as 2, 3, 4, 5, etc., and since the distance between the width direction W of the display area 1 and the length direction L of the display panel 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, and the intersection of the photosensitive element 21 on one side of each length direction L and the photosensitive element 21 on one side of each width direction W is located in one of the display sub-areas to collect the ambient light brightness signal of the display sub-area where each intersection is located.

In this embodiment, the non-display area 2 is disposed around the periphery of the display area 1, the non-display area 2 includes a plurality of driving IC chips 22 in addition to the plurality of photosensitive elements 21, and the plurality of driving IC chips 22 are electrically connected to the display area 1 and are used for driving the display area 1 to display according to a certain time sequence. The at least one side of the length direction L of the display region 1 is provided with M photosensitive elements 21, that is, one side may be provided with M photosensitive elements 21, or both sides may be provided with M photosensitive elements 21, and the at least one side of the width direction W of the display region 1 is provided with N photosensitive elements 21, that is, one side may be provided with N photosensitive elements 21, or both sides may be provided with N photosensitive elements 21.

Specifically, as shown in fig. 1, the photosensitive elements 21 are provided with 2 photosensitive elements 21 at the same time on both sides in the length direction L of the display area 1, and 3 photosensitive elements 21,2 and 3 photosensitive elements 21 on one side in the width direction W of the display area 1 divide the display area 1 into 2*3 display sub-regions, and the intersection 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-regions. In order to simplify the wiring manner and shorten the wiring distance, the display brightness of each display sub-region is controlled by the photosensitive element 21 on the side of the length direction L closest to the display sub-region and the photosensitive element 21 on the side of the width direction W, respectively, and the ambient light brightness signal of the display sub-region is collected. The distance between the two sides of the display area 1 in the length direction L is relatively long, so the external environment brightness will change greatly, and the matching degree of the collected environment brightness signal and the actual brightness of the display sub-area to be controlled is improved by respectively arranging 2 photosensitive elements 21 on the two sides.

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 control a display sub-region together, and signals are collected from two positions of the display sub-region respectively, so that the accuracy of judging the brightness of the external environment light can be improved, and the accuracy of the partition display is improved.

In another embodiment, M photosensitive elements 21 may be provided only on one side in the length direction L of the display area 1, and N photosensitive elements 21 may be provided only on one side in the width direction W of the display area 1.

Specifically, as shown in fig. 1, in some embodiments of the present application, each of the photosensitive elements 21 includes a first thin film transistor 211; the first thin film transistor 211 collects real ambient light brightness signals in real time and converts the signals into current signals, and the current signals are output to the display control circuit 51 as first ambient light brightness signals. The display control circuit 51 is configured to determine a target display brightness of each display sub-region based on the first ambient light brightness 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 brightness.

In this embodiment, the first thin film transistor 211 is used as the photosensitive element 21 to collect the ambient light brightness signal, so that the first thin film transistor 211 is integrated on the display panel, and a reserved space is not required to be separately provided for the photosensitive element 21, which is beneficial to the narrow frame design of the display panel.

More specifically, as shown in fig. 1 and 2, each photosensitive element 21 further includes a second thin film transistor 212; a black matrix 212a is disposed on one side of the second thin film transistor 212 facing the ambient light incident direction, and an 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 collects a full-black ambient light brightness signal in real time and converts the signal into a current signal, and the current signal is output to the display control circuit 51 as a second ambient light brightness signal. And the display control circuit 51 is configured to determine a target display brightness of each display sub-region based on the first ambient light brightness signal and the second ambient light brightness signal output by each photosensitive element 21, and drive the display component of each display sub-region to display according to the corresponding target display brightness.

In this embodiment, each of the light sensing elements 21 further includes a second thin film transistor 212, and the upper side of the second thin film transistor 212 is shielded by a black matrix 212a, that is, the second thin film transistor 212 is used as an all black contrast group, and performs all black ambient light luminance signal collection and converts into a current signal as a second ambient light luminance signal. The display control circuit 51 determines the target display brightness of each display sub-region based on the first ambient light brightness signal and the second ambient light brightness signal collected by the first thin film transistor 211 and the second thin film transistor 212. The second ambient light brightness signal collected by the second thin film transistor 212 can perform a certain calibration function on the first ambient light brightness signal, so that the accuracy of the target display brightness determined by the display control circuit 51 is further improved, the display panel can accurately perform partition display, and the contrast and the color of the display panel are not affected by ambient light.

More specifically, as shown in fig. 3 and 4, the display panel further includes: a lower substrate base plate 3 and an upper glass base plate 4 covering the display area 1 and the non-display area 2; a plurality of photosensitive elements 21 are provided in the non-display area 2 on the underlying substrate base 3; the ambient light is irradiated onto each photosensitive element 21 through the upper glass substrate 4.

In this embodiment, as shown in fig. 4, the layer structure of the non-display region 2 of the display panel is illustrated by taking only the first thin film transistor 211 as an example. The plurality of photosensitive elements 21 are all arranged on the underlying substrate base plate 3, so that the plurality of photosensitive elements 21 can be arranged in the same layer with the thin film transistors of the display area 1 of the display panel, and the structure of the display panel is further simplified. Unlike the display region 1, the non-display region 2 is not provided with other light emitting elements above the photosensitive element 21. The space between the photosensitive element 21 and the upper glass substrate 4 can be filled with transparent glue, and the photosensitive element 21 is covered and packaged, so that the ambient light can be irradiated on the photosensitive element 21 through the upper glass substrate 4 and the middle transparent glue layer 7. The substrate may be a glass substrate, which is made of the same material as the upper glass substrate 4, or a substrate formed by depositing a polyimide material.

The first thin film transistor 211 and the second thin film transistor 212 each include a gate electrode 211c and an active layer 211d disposed on the underlying substrate 3, and a source electrode 211a and a drain electrode 211b electrically connected to the active layer 211d, and the gate electrode 211c and the active layer 211d are spaced apart from each other by an insulating layer 6. The gate electrodes 211c, i.e., G1 and G2 shown in fig. 5, wherein the source electrodes 211a of the first and second thin film transistors 211 and 212 are electrically connected to the source signal, and the drain electrodes 211b of the first and second thin film transistors 211 and 212 are electrically connected to the converter, when G1 and G2 are turned on, an induced current, i.e., a first current and a second current, is formed between the source electrodes 211a and the drain electrodes 211 b.

In some embodiments of the present application, as shown in fig. 1 and 5, the display control circuit 51 includes a signal conversion sub-circuit and a control sub-circuit. The signal conversion sub-circuit is configured to convert the first ambient light signal of each photosensitive element 21 or the first ambient light luminance signal and the second ambient light signal of each photosensitive element 21 into a luminous flux digital signal, and output the maximum luminous flux digital signal serving as an ambient light reference to the control sub-circuit together with other luminous flux digital signals. The control sub-circuit is used for being electrically connected with a main control system 8 of the electronic equipment, obtaining target display brightness corresponding to each display sub-region according to the ambient light reference and the current display image information, generating corresponding target pulse width modulation signals according to the target display brightness, and outputting the target pulse width modulation signals to the display components of the display sub-regions for image display.

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

When the light sensing 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 signal collected by the first thin film transistor 211 and the second ambient light signal collected by the second thin film transistor 212 into a light flux digital signal, and output the maximum light flux digital signal as an ambient light reference to the control sub-circuit together with other light flux digital signals. And the control sub-circuit gives target display brightness corresponding to each display sub-region according to the ambient light reference and the current display image information, produces corresponding pulse width modulation signals according to the target display brightness, and outputs the pulse width modulation signals to the display components of the display sub-regions for image display.

Further, as shown in fig. 1 and 5, the signal conversion sub-circuit includes: a signal converter 511 (Switch, SW) and an Analog to digital converter 512 (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 to convert the first ambient light luminance signal and the second ambient light luminance signal of each photosensitive element 21 into a corresponding first voltage signal V1 and a corresponding second voltage signal V2. As a possible embodiment, the signal converter 511 may be an operational amplifier, and on the one hand, can convert the first ambient light brightness signal output in the form of current into the first voltage signal V1, and on the other hand, can amplify the first ambient light brightness signal, or convert the first ambient light brightness signal and the second ambient light brightness 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 high amplification factor.

The analog-to-digital converter 512 is configured to convert the first voltage signal V1 of each photosensitive element 21 into a corresponding first digital signal, calculate light fluxes of each photosensitive element 21 based on the first digital signals of each photosensitive element 21, and output the maximum light flux serving as an ambient light reference to the control sub-circuit together with other light fluxes; or, for converting the first voltage signal V1 and the second voltage signal V2 of each light-sensing element 21 into corresponding first digital signal and second digital signal; 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 thereof is output to the control sub-circuit as an ambient light reference together with other luminous fluxes.

The analog-to-digital converter 512 calculates the luminous flux of each photosensitive element 21, determines the maximum luminous flux value by interpretation, and takes the maximum luminous flux value as the ambient light reference and counts the luminous flux together with other luminous fluxes to the control sub-circuit.

The signal converter 511 and the analog-to-digital converter 512 can convert the first ambient light brightness signal or the first ambient light brightness signal and the second ambient light brightness signal collected by the photosensitive element 21 into digital signals that can be interpreted by the control sub-circuit, and the control sub-circuit is convenient for adjusting the backlight duty ratio according to the digital signals.

In some embodiments of the present application, as shown in fig. 5, a first calibration value and a second calibration value are stored in advance in the analog-to-digital converter 512, and the analog-to-digital converter 512 calibrates the first voltage signal V1 and the second voltage signal V2 based on the first calibration value and the second calibration value before converting the first voltage signal V1 and the second voltage signal V2 of each photosensitive element 21 into the corresponding first digital signal and second digital signal; the calibrated first voltage signal V1 and the second voltage signal V2 are converted. The first calibration value and the second calibration value are a first ambient light brightness signal and a second ambient light brightness signal collected by the first thin film transistor 211 and the second thin film transistor 212 under the all black environment.

The first calibration value and the second calibration value acquired by the first thin film transistor 211 and the second thin film transistor 212 in the all-black environment are used as zero calibration values in the burning 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 the corresponding first digital signal and second digital signal, so that the consistency of the contrast of the display panel can be ensured.

In a specific calibration process, as shown in fig. 6, first, the first thin film transistor 211 and the second thin film transistor 212 collect a first ambient light brightness signal P1 in a completely black environment, the second thin film transistor 212 collects a second ambient light brightness signal P2, the first ambient light brightness signal P1 and the second ambient light brightness signal P2 are recorded as initial values (P1, P2), the initial values are used as zero calibration values (P1 ', P2') in the burning IC, the zero calibration values (P1 ', P2') are pre-stored in the analog-to-digital converter 512, then, the first thin film transistor 211 collects an actual first ambient light brightness signal P1 in real time, the second thin film transistor 212 collects a second ambient light brightness signal P2 in a completely black environment, calculates = (P1-data P2), calculates X = (P1-P1 ') - (P2-P2'), and calculates an illuminance value Lux = F (X), and reports the Lux value to the control sub-circuit, specifically to a Microcontroller Unit 513 in the control sub-circuit.

In some embodiments of the present application, as shown in fig. 1 and 5, the control sub-circuit includes a micro-control processor 513, a timing controller (Tcon) 514, and an LED driver (LED driver) 515.

The micro control processor 513 is configured to send the received ambient light reference and the other light fluxes to the main control system 8 of the electronic device, so that the main control system 8 determines the reference display brightness based on the ambient light reference, and determines the target display brightness of each display sub-area based on a ratio relationship between the other light fluxes and the ambient light reference, and outputs the target display brightness to the micro control processor 513.

The analog-to-digital converter 512 transmits the maximum luminous flux and other luminous flux values to the micro-control processor 513 in the form of I2C, among others. And microcontroller 513 also sends the received ambient light reference in the form of I2C to the master control system 8 of the electronic device together with the other light fluxes.

The main control system 8 is further configured to generate a standard timing control parameter based on the ambient light reference and send the standard timing control parameter to the timing controller 514, where the timing controller 514 generates a standard timing control signal according to the standard timing control parameter, and the timing controller 514 sends the standard timing control signal to the micro control processor 513.

The micro control processor 513 is further configured to receive the current display image information sent by the main control system 8, adjust the standard timing control signal sent by the timing controller 514 based on the target display brightness of each display sub-region, obtain a 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.

And the LED driver 515 is configured to drive the display components of the display sub-regions to display the currently displayed image according to the target timing control signal of each display sub-region.

In this embodiment, the main control system 8 is a main control system 8 of an electronic device, and can be understood as a central processing unit of the electronic device, and is configured to control a picture to be displayed by the display panel, calculate and process a transmission signal sent by the micro control processor 513, and input timing control information and the like related to display image information.

As shown in fig. 1, the signal conversion sub-circuit and the control sub-circuit may be located on the same printed circuit board 5, so as to reduce the space occupied by the signal conversion sub-circuit and the 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, and as shown in fig. 1, each photosensitive element 21 is connected to the display control circuit 51 through two flexible circuit boards 23. The two are connected by the flexible circuit board 23, and the display control circuit 51 can be bent at the back of the display panel, thereby reducing the frame of the display panel.

In this embodiment, when the photosensitive elements 21 are arranged as shown in fig. 1, 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 the groups of photosensitive elements 21 are different, for example, the strong light on one side and the weak light on the other side, the specific steps of adjusting the screen brightness zones are as follows: s1: the light sensing element 21 converts the first ambient light signal and the second ambient light signal into a first current signal C1 and a second current signal C2 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 to the analog-to-digital converter 512, and the analog-to-digital converter 512 performs judgment and calculation to output 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 an ambient light reference together with other luminous fluxes to the micro control processor 513 in the form of I2C, and the micro control processor 513 adjusts the backlight duty ratio according to the current ambient light brightness; s4: the micro-control processor 513 sends the received ambient light reference together with other light fluxes in the form of I2C to the main control system 8, i.e. the front-end system, of the electronic device; s5: the main control system 8 is configured to send the received ambient light reference and other light fluxes to the main control system 8 of the electronic device in a PWMI manner, so that the main control system 8 determines reference display brightness based on the ambient light reference, and determines target display brightness of each display sub-area based on a ratio relationship between the other light fluxes and the ambient light reference, and outputs the target display brightness to the micro control processor 513; while the main control system 8 is also configured to generate timing control standard parameters based on the ambient light reference to be sent to the timing controller 514 in PWMI form; s6: the timing controller 514 generates a standard timing control signal according to the timing control standard parameter, and the timing controller 514 transmits the standard timing control signal to the micro control processor 513 in the form of PWMI; s7: the timing controller 514 is further configured to receive current display image information sent by the main control system 8, where the current image information is 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 outputs a standard timing control signal, that is, a reference gray scale X, according to the signal of S4, with the sensed maximum ambient light, and adjusts the standard timing control signal sent by the timing controller 514 based on the target display brightness of each display sub-region to obtain a target timing control signal of each display sub-region, that is, adjust the output gray scale of SOUT, and output Xa/d, xb/d, xc/d, and so on, respectively; s8: the micro control processor 513 sends the target timing control signal and the current image information, i.e., the calculated pulse width modulation signal PWMO, of each display sub-region to the LED driver 515; when the light sensing intensity of the LED driver 515 is different, the brightness of the screen is adjusted in a partitioning mode, reflection is effectively reduced, glare is prevented, and the contrast and the color of the screen are not affected by ambient light.

A second aspect of the embodiments of the present application provides an electronic device, including the display panel described above. The electronic device may be, but is not limited to, an electronic device with a display function, such as a display, a tablet computer, a notebook, a television, and a mobile phone. The electronic equipment in this application embodiment, the display panel that it includes, when different positions department photosensitive strength of screen is different, can realize the luminance of subregion adjustment screen, effectively reduce the reflection and prevent dazzling light, guarantee that the contrast and the color of screen do not receive the influence of external environment light.

It should be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.

All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.

Claims (11)

1. A display panel of an electronic device, the display panel comprising: 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;

the display sub-region at least corresponds to one photosensitive element, and each photosensitive element is respectively used for collecting an ambient light brightness signal corresponding to the display sub-region;

each photosensitive element is electrically connected with the display control circuit and outputs the collected ambient light brightness signals corresponding to the display sub-regions to the display control circuit; the display control circuit is used for determining the target display brightness of each display sub-region based on the ambient light brightness signal of each display sub-region, and driving the display component of each display sub-region to display according to the corresponding target display brightness.

2. The display panel according to claim 1, wherein M number of the photosensitive elements and N number of the photosensitive elements are respectively disposed on at least one side in a length direction and at least one side in a width direction of the display area, M and N are positive integers, the M number of the photosensitive elements and the N number of the photosensitive elements divide the display area into M × N number of the display sub-areas, and an intersection of the photosensitive element on each side in the length direction and the photosensitive element on each side in the width direction is located in one of the display sub-areas to collect an ambient light brightness signal of the display sub-area where each intersection is located.

3. The display panel according to claim 1, wherein each of the photosensitive elements comprises a first thin film transistor; the first thin film transistor collects real environment light brightness signals in real time and converts the real environment light brightness signals into current signals, and the current signals are output to the display control circuit as first environment light brightness signals;

the display control circuit is configured to determine target display brightness of each display sub-region based on the first ambient light brightness signal output by each photosensitive element, and drive the display component of each display sub-region to display according to the corresponding target display brightness.

4. The display panel according to claim 3, wherein each of the light sensing elements further comprises a second thin film transistor;

a black matrix is arranged on one side, facing the ambient light incidence direction, of the second thin film transistor, and the orthographic projection of the black matrix on the second thin film transistor covers the second thin film transistor, so that the second thin film transistor collects a full-black ambient light brightness signal in real time and converts the full-black ambient light brightness signal into a current signal which is output to the display control circuit as a second ambient light brightness signal;

the display control circuit is configured to determine target display brightness of each display sub-region based on the first ambient light brightness signal and the second ambient light brightness signal output by each photosensitive element, and drive the display component of each display sub-region to display according to the corresponding target display brightness.

5. The display panel according to claim 4, wherein the display panel further comprises: a bottom substrate base plate and an upper glass base plate covering the display area and the non-display area; the plurality of photosensitive elements are arranged in the non-display area on the underlying substrate base plate; and ambient light is irradiated to each photosensitive element through the upper glass substrate.

6. The display panel according to claim 3 or 4, wherein the display control circuit comprises a signal conversion sub-circuit and a control sub-circuit;

the signal conversion sub-circuit is configured to convert the first ambient light signal of each of the photosensitive elements or the first ambient light luminance signal and the second ambient light luminance signal of each of the photosensitive elements into a light flux digital signal, and output a maximum light flux of the light flux digital signal to the control sub-circuit together with other light fluxes as an ambient light reference;

the control sub-circuit is used for being electrically connected with a main control system of the electronic equipment, obtaining target display brightness corresponding to each display sub-region according to the ambient light reference and the current display image information, generating corresponding target pulse width modulation signals according to the target display brightness, and outputting the pulse width modulation signals of each target to the display component of each display sub-region for image display.

7. The display panel according to claim 6, wherein the signal conversion sub-circuit comprises: a signal converter and an analog-to-digital converter;

the signal converter is configured to convert the first ambient light brightness signal of each of the photosensitive elements into a corresponding first voltage signal, or,

the first ambient light brightness signal and the second ambient light brightness signal of each photosensitive element are converted into corresponding first voltage signals and second voltage signals;

the analog-to-digital converter is configured to convert the first voltage signal of each light-sensing element into a corresponding first digital signal, calculate, based on the first digital signal of each light-sensing element, light flux of each light-sensing element, and output, to the control sub-circuit, the maximum light flux of the light-sensing elements as an ambient light reference together with other light fluxes; alternatively, the first and second electrodes may be,

the first voltage signal and the second voltage signal of each photosensitive element are converted into corresponding first digital signals and second digital signals; and calculating the luminous flux of each photosensitive element based on the difference between the first digital signal and the second digital signal of each photosensitive element, and outputting the maximum luminous flux as an ambient light reference to the control sub-circuit together with other luminous fluxes.

8. The display panel according to claim 7, wherein a first calibration value and a second calibration value are stored in advance in the analog-to-digital converter, and the analog-to-digital converter calibrates the first voltage signal and the second voltage signal of each of the light-sensing elements based on the first calibration value and the second calibration value before converting the first voltage signal and the second voltage signal into corresponding first digital signal and second digital signal; converting the calibrated first voltage signal and the calibrated second voltage signal;

the first calibration value and the second calibration value are a first ambient light brightness signal and a second ambient light brightness signal acquired by the first thin film transistor and the second thin film transistor under a black-all environment.

9. The display panel of claim 6, wherein the control subcircuit comprises: the system comprises a micro-control processor, a time sequence controller and an LED driver;

the micro control processor is used for sending the received ambient light reference and other luminous fluxes to a main control system of the electronic equipment together, so that the main control system determines reference display brightness based on the ambient light reference, and determines target display brightness of each display sub-area based on a ratio relation between the other luminous fluxes and the ambient light reference and outputs the target display brightness to the micro control processor;

the master control system is also used for generating a time sequence control standard parameter based on an ambient light reference and sending the time sequence control standard parameter to the time sequence controller, the time sequence controller generates a standard time sequence control signal according to the time sequence control standard parameter, and the time sequence controller sends the standard time sequence control signal to the micro control processor;

the micro control processor is further configured to receive current display image information sent by the main control system, adjust a standard timing control signal sent by the timing controller based on target display brightness of each display sub-region to obtain a 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;

and the LED driver is used for driving the display components of the display sub-regions to display the current display image according to the target time sequence control signal of each display sub-region.

10. A display panel as claimed in any one of claims 1 to 5 wherein each light sensitive element is electrically connected to the display control circuitry by at least one flexible circuit board.

11. An electronic device characterized by comprising the display panel of any one of claims 1 to 10.

Images