Display screen, brightness compensation method of display screen, electronic device and storage medium

Abstract

The application discloses a display screen, a brightness compensation method of the display screen, an electronic device and a storage medium, and belongs to the technical field of display screens, and comprises a display driving chip, which is used for acquiring a preset brightness level of a display screen; determining a target compensation voltage list matched with the preset brightness level from a set composed of a plurality of preset compensation voltage lists; acquiring a target compensation voltage corresponding to a target pixel row to be currently scanned in the pixel row according to a relationship between a serial number in the target compensation voltage list and a row number of the target pixel row in the display screen, and inputting a first signal containing the target compensation voltage to a pixel driving circuit of a pixel of the target pixel row; an auxiliary driving module is used for generating a second signal and inputting the second signal to the pixel driving circuit of the pixel of the target pixel row; and the pixel driving circuit is used for driving the pixel corresponding to the target pixel row to display according to the first signal and the second signal.

Description

Technical Field

[0001] This application belongs to the field of display screen technology, specifically relating to a display screen, a brightness compensation method for the display screen, an electronic device, and a storage medium. Background Technology

[0002] Currently, displays use the pixels of light-emitting diodes to display images.

[0003] In related technologies, the pixels of the light-emitting diodes in the display screen are arranged in an array, and the display screen includes multiple rows of pixels.

[0004] In the process of developing this application, the inventors discovered that the related technology has at least the following problems: Since the wires between the pixel rows farther away from the power supply of the display screen are longer and the impedance of the wires is greater, the driving voltage of the power supply is smaller for the pixel rows farther away from the power supply of the display screen. Therefore, the brightness of the pixel rows farther away from the power supply of the display screen is smaller, resulting in inconsistent brightness distribution of the display screen and poor display effect. Summary of the Invention

[0005] The purpose of this application is to provide a display screen, a brightness compensation method for the display screen, an electronic device, and a storage medium, which can solve the problem in the related art that the pixel rows farther away from the power supply of the display screen receive a smaller driving voltage, resulting in inconsistent brightness distribution of the display screen and poor display effect.

[0006] In a first aspect, embodiments of this application provide a display screen, wherein the pixels of the display screen are arranged in an array, the display screen includes multiple pixel rows, a display driver chip, and an auxiliary driver module, and each pixel has a corresponding pixel driver circuit; the pixel is connected to the corresponding pixel driver circuit, the display driver chip is connected to each pixel driver circuit, and the auxiliary driver module is connected to each pixel driver circuit;

[0007] The display driver chip is used to acquire a preset brightness level of the display screen; determine a target compensation voltage list that matches the preset brightness level from a set of multiple preset compensation voltage lists; acquire a target compensation voltage corresponding to the target pixel row based on the relationship between the row number of the target pixel row to be scanned in the display screen and the serial number in the target compensation voltage list; and input a first signal containing the target compensation voltage to the pixel driving circuit of the pixel in the target pixel row; each compensation voltage list has a corresponding brightness level; the compensation voltage list contains multiple compensation voltages, and each compensation voltage has a corresponding serial number;

[0008] The auxiliary driving module is used to generate a second signal and input it to the pixel driving circuit of the pixel in the target pixel row;

[0009] The pixel driving circuit of the target pixel row is used to drive the pixels corresponding to the target pixel row to display according to the first signal and the second signal, so that the brightness of the target pixel row is consistent with the brightness of other pixel rows.

[0010] Secondly, embodiments of this application also provide a brightness compensation method for a display screen, applied to a display driver chip of the display screen, wherein the pixels of the display screen are arranged in an array, and the display screen includes multiple pixel rows, the method comprising:

[0011] Obtain the preset brightness level of the display screen;

[0012] From a set of multiple preset compensation voltage lists, a target compensation voltage list matching the preset brightness level is determined; each compensation voltage list has a corresponding brightness level; the compensation voltage list contains multiple compensation voltages, and each compensation voltage has a corresponding serial number.

[0013] Based on the relationship between the row number of the target pixel row to be scanned in the display screen and the serial number in the target compensation voltage list, the target compensation voltage corresponding to the target pixel row is obtained;

[0014] A first signal containing the target compensation voltage is input to the pixel driving circuit of the pixel in the target pixel row, so that the pixel driving circuit of the pixel in the target pixel row drives the pixel corresponding to the target pixel row to display according to the first signal, so that the brightness of the target pixel row is consistent with the brightness of other pixel rows.

[0015] Thirdly, embodiments of this application provide an electronic device including a processor and a memory, the memory storing programs or instructions executable on the processor, the programs or instructions, when executed by the processor, implementing the steps of the method described in the second aspect.

[0016] Fourthly, embodiments of this application provide a readable storage medium on which a program or instructions are stored, which, when executed by a processor, implement the steps of the method described in the second aspect.

[0017] Fifthly, embodiments of this application provide a chip, the chip including a processor and a communication interface, the communication interface being coupled to the processor, the processor being used to run programs or instructions to implement the method as described in the second aspect.

[0018] In a sixth aspect, embodiments of this application provide a computer program product stored in a storage medium, which is executed by at least one processor to implement the method described in the second aspect.

[0019] In this embodiment, a preset brightness level of the display screen is obtained by a display driver chip. Then, a target compensation voltage list matching the preset brightness level is determined from a set of multiple preset compensation voltage lists. Subsequently, based on the relationship between the row number of the target pixel row to be scanned in the display screen and the sequence number in the target compensation voltage list, the target compensation voltage corresponding to the target pixel row is obtained. A first signal containing the target compensation voltage is input to the pixel driving circuit of the pixel in the target pixel row. An auxiliary driving module generates a second signal and inputs it to the pixel driving circuit of the pixel in the target pixel row. The pixel driving circuit of the pixel in the target pixel row drives the pixel corresponding to the target pixel row to display according to the first and second signals, so that the brightness of the target pixel row is consistent with the brightness of other pixel rows, thereby improving the consistency of the brightness distribution of the display screen and thus improving the display effect. This solves the problem in related technologies that the pixel rows farther away from the power supply of the display screen receive a smaller driving voltage, resulting in inconsistent brightness distribution and poor display effect. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a display screen provided in an embodiment of this application;

[0021] Figure 2 This is a flowchart illustrating the steps of a brightness compensation method for a display screen provided in an embodiment of this application;

[0022] Figure 3 This is a schematic diagram of the pixel driving circuit provided in an embodiment of this application;

[0023] Figure 4 This is a schematic diagram of the operation process of the pixel driving circuit provided in the embodiments of this application;

[0024] Figure 5 This is a schematic diagram of the specific architecture of the display screen provided in the embodiments of this application;

[0025] Figure 6 This is a schematic diagram of the display area pixel array of the display provided in the embodiments of this application;

[0026] Figure 7 This is a schematic diagram showing the relationship between brightness levels and compensation voltage lists provided in the embodiments of this application;

[0027] Figure 8 This is a schematic diagram of the brightness compensation system for the display screen provided in an embodiment of this application;

[0028] Figure 9 This is a schematic diagram illustrating the change of the target compensation voltage over time, as provided in an embodiment of this application.

[0029] Figure 10 This is a schematic diagram showing the changes in anode initialization voltage, negative electrode voltage, and brightness value in related technologies;

[0030] Figure 11 This is a schematic diagram of the variation curves of anode initialization voltage, negative electrode voltage, and brightness value provided in the embodiments of this application;

[0031] Figure 12 This is a schematic diagram of an electronic device provided in an embodiment of this application;

[0032] Figure 13 This is a schematic diagram of the hardware structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0033] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0034] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0035] Reference Figure 1This application provides a display screen, wherein the pixels of the display screen are arranged in an array, the display screen includes multiple pixel rows, a display driver chip 10, and an auxiliary driver module, each pixel has a corresponding pixel driver circuit 30; the pixel is connected to the corresponding pixel driver circuit 30, the display driver chip 10 is connected to each pixel driver circuit 30, and the auxiliary driver module is connected to each pixel driver circuit 30; the display driver chip 10 is used to obtain a preset brightness level of the display screen; determine a target compensation voltage list matching the preset brightness level from a set composed of multiple preset compensation voltage lists; and determine the target compensation voltage list matching the preset brightness level based on the row number of the target pixel row to be scanned in the display screen. The target compensation voltage is obtained by relating the serial numbers in the target compensation voltage list to the target pixel row; and a first signal containing the target compensation voltage is input to the pixel driving circuit 30 of the pixel 40 of the target pixel row; each compensation voltage list has a corresponding brightness level; the compensation voltage list contains multiple compensation voltages, and each compensation voltage has a corresponding serial number; the auxiliary driving module is used to generate a second signal and input it to the pixel driving circuit 30 of the pixel 40 of the target pixel row; the pixel driving circuit 30 of the pixel 40 of the target pixel row is used to drive the pixel corresponding to the target pixel row to display according to the first signal and the second signal, so that the brightness of the target pixel row is consistent with the brightness of other pixel rows.

[0036] In this embodiment, the display driver chip 10 obtains the preset brightness level of the display screen. Then, from a set of multiple preset compensation voltage lists, a target compensation voltage list matching the preset brightness level is determined. Next, based on the relationship between the row number of the target pixel row to be scanned in the display screen and its sequence number in the target compensation voltage list, the target compensation voltage corresponding to the target pixel row is obtained. A first signal containing the target compensation voltage is input to the pixel driving circuit 30 of the pixel 40 in the target pixel row. The auxiliary driving module generates a second signal and inputs it to the pixel driving circuit 30 of the pixel 40 in the target pixel row. The pixel driving circuit 30 of the pixel 40 in the target pixel row drives the corresponding pixels of the target pixel row to display according to the first and second signals, making the brightness of the target pixel row consistent with the brightness of other pixel rows. This improves the consistency of the brightness distribution of the display screen, thereby improving the display effect and solving the problem in related technologies where pixel rows farther from the power supply of the display screen receive smaller driving voltages, leading to inconsistent brightness distribution and poor display effect.

[0037] It should be noted that the pixels of the display screen are driven to emit light by the driving voltage provided by the pixel driving circuit 30. In this embodiment, the display screen can be an AMOLED display screen. The AMOLED display screen uses an active-matrix organic light-emitting diode (AMOLED) display module for display. The AMOLED display module uses a TFT (Thin Film Transistor) switching array to drive the organic light-emitting diode (OLED) pixels to achieve image display. The pixel driving circuit 30 of the OLED pixels of the display screen can be a 7T(TFT)1C (Capacitor). In addition, the OLED pixels of the display screen can also be other types, such as 8T1C.

[0038] Figure 3 The pixel driving circuit 30 is of model 7T1C. This pixel driving circuit 30 consists of 7 transistors and 1 storage capacitor. The components, pins and signals of the pixel driving circuit 30 are described in Table 1 below:

[0039]

[0040]

[0041] Table 1

[0042] Reference Figure 4 The operation of the pixel driving circuit 30 of the 7T1C model is as follows:

[0043] (1) t1 time period: The light emission control signal EM[n] of the nth row changes from low level to high level, turning off transistors T5 and T6, so that the OLED pixels of the nth row stop emitting light.

[0044] (2) t2 time period: The row scanning signal Nscan[n-1] of the n-1th row turns on the T4 transistor, and the initialization voltage Vint1 of the Cst capacitor adjusts the voltage at point B to the negative voltage value of Vint1, that is, initializes the storage capacitor Cst.

[0045] (3) Time period t3: The first scan signal Nscan[n] of the nth row turns on transistors T2, T3, and T7, while transistor T4 is turned off. Turning on transistor T2 writes the image data for the current row, which means setting the voltage at point A to the VData voltage of the display data signal Data. At this time, the voltage at point B was initially set to negative in the previous time period. Transistor T1 remains on, and the turn on of transistor T3 shorts the gate and source of transistor T1. Since the driving transistor T1 is operating in the saturation region, there is a threshold voltage VTH. Therefore, the potential at point B will be charged until VData-VTH is reached and then cut off. At this time, the storage voltage Cst is VData-VTH, which prepares for subsequent compensation of VTH.

[0046] (4) t4 time period: The second scan signal Pscan[n] in the nth row turns on the T7 tube, and the anode potential of the OLED pixel will be initialized to the Vint2 voltage, which is to initialize the OLED parasitic capacitance Clu.

[0047] (5) During time period t5: The light-emitting control signal EM[n] of the nth row is pulled low, and transistors T5 and T6 are turned on. At this time, the voltage of the storage capacitor Cst is VData-VTH, keeping transistor T1 on. The current I flowing through the driving transistor T1 at this time is:

[0048]

[0049] Where K = CoxμW / L, μ is the electron mobility, Cox is the capacitance per unit area of ​​T1 transistor, and W / L is the width-to-length ratio of T1 transistor.

[0050] When current I flows through the OLED emitting pixel, the current I causes the OLED emitting pixel to emit light.

[0051] In related technologies, the value of voltage Vint2 is equal to the value of voltage ELVSS, and both the values ​​of voltage Vint2 and voltage ELVSS are negative voltage values.

[0052] In one embodiment of this application, the voltage Vint2 is compensated so that its value is greater than that of the voltage ELVSS, thereby compensating the driving voltage of the pixels in the target pixel row, obtaining the target driving voltage, and using the target driving voltage to drive the pixels in the target pixel row, thereby increasing the current I and increasing the brightness of the OLED light-emitting pixel, thus achieving brightness compensation of the OLED light-emitting pixel.

[0053] Figure 5 The following is a schematic diagram of the AMOLED display architecture. The components and signal descriptions of the AMOLED display are shown in Table 2:

[0054] DDIC Display driver chip 10 PMIC Power management chip 21 Data Display data signal ELVDD Pixel positive voltage ELVSS Pixel negative voltage Vint1 Cst capacitor initial voltage Vint2 Pixel anode initial voltage Scan Driver Line scan drive circuit 22 EM Driver Light-emitting line scanning drive circuit 23 Scan Line scan signal EM Light control signal Pixel OLED luminous pixels

[0055] Table 2

[0056] The display driver chip 10 (DDIC, Display Driver IC) controls the output of the Data, Vint1, and Vint2 voltage signals. It also controls the row scan driver circuit 22 (Scan Driver) to output the display scan signal (Scan) and the light-emitting row scan driver circuit 23 (EM Driver) to output the EM signal. The Scan signal includes the aforementioned Pscan and Nscan signals. The power management chip 21 (PMIC, Power Management IC) controls the output of ELVDD and ELVSS. When the Scan signal is valid, the Data signal of the current row is written to the Pixel, and then the EM signal is emitted. ELVDD and ELVSS work together to power the OLED, causing the OLED's light-emitting pixels to emit light.

[0057] Each brightness level of the display screen has a corresponding ELVSS and a corresponding driving voltage, thus enabling each brightness level to achieve its corresponding brightness. The brightness levels of the display screen can be set by the user; the preset brightness level is the brightness level set by the user.

[0058] Specifically, in some embodiments, the display screen has 11 brightness levels. Starting from the first brightness level, the brightness levels increase step by step, and the 11th brightness level is the highest brightness level of the display screen. That is, when the display screen is at the 11th brightness level, the brightness of the display screen is at its highest.

[0059] In addition, the display screen can also be a liquid crystal display (LCD), a mini light-emitting diode display (Mini LED, a type of LED technology), or a micro light-emitting diode display (Micro LED).

[0060] It should also be noted that the compensation voltages in the compensation voltage list are set by the staff during the factory debugging of the display, based on the screen brightness and ELVSS voltage value corresponding to each brightness level of the display. The compensation voltage is the Pixel anode initialization voltage Vint2.

[0061] Figure 6 This is a schematic diagram of the pixel array of the display area of ​​the monitor. The display area of ​​the monitor extends from the nth row to the (n+m)th row, where n and m are positive integers. For example, n represents the row number of the nth row and n+m represents the row number of the (n+m)th row. The pixel row of the nth row is close to the top of the screen, and the pixel row of the (n+m)th row is close to the bottom of the screen.

[0062] In the AMOLED display module, the Vint2 trace output by DDIC is a mesh and connected to all 7T1C pixel driving circuits 30. That is, the Vint2 of all OLED light-emitting pixels is emitted by DDIC. DDIC is located at the bottom of the display screen, that is, DDIC is located below the pixel row of row n+m.

[0063] Optionally, in some embodiments, the display driver chip 10 is specifically used to divide the display area of ​​the display screen into multiple different pixel regions, each pixel region including multiple consecutive pixel rows; each pixel region corresponds to a sequence number; for each brightness level, a corresponding compensation voltage is set for each pixel region corresponding to the sequence number; and all the compensation voltages and sequence numbers corresponding to each brightness level are combined to form a compensation voltage list corresponding to each brightness level.

[0064] In this embodiment of the application, the display driver chip 10 forms a set of multiple preset compensation voltage lists, and then determines a target compensation voltage list that matches the preset brightness level from the set of multiple preset compensation voltage lists.

[0065] It should be noted that the number of pixel rows in a pixel region can be set according to the situation and is not limited here. The number of pixel rows in each pixel region can be the same or different, and is not limited here.

[0066] Optionally, in some embodiments, the greater the distance between the pixel region and the power supply of the display screen, the larger the serial number corresponding to the pixel region, and the larger the compensation voltage corresponding to the serial number of the pixel region.

[0067] In this embodiment, since the wires between the pixel row and the power supply are longer and the impedance of the wires are greater, the driving voltage of the power supply is smaller for the pixel row that is farther away from the power supply of the display screen. Therefore, the brightness of the pixel row that is farther away from the power supply of the display screen is smaller. Thus, the greater the distance between the pixel area and the power supply of the display screen, the larger the sequence number of the pixel area, and the larger the compensation voltage corresponding to the sequence number of the pixel area, so as to improve the consistency of brightness between the target pixel row and other pixel rows.

[0068] For example, refer to Figure 7Figure (c) shows the compensation voltage list corresponding to the first brightness level ELVSS_1, which includes 8 bit numbers and 8 supplementary voltages. The 8 bit numbers are 00 (corresponding to voltage V0), 01 (corresponding to voltage V1), 02 (corresponding to voltage V2), 03 (corresponding to voltage V3), 04 (corresponding to voltage V4), 05 (corresponding to voltage V5), 06 (corresponding to voltage V6), and 07 (corresponding to voltage V7). The 8 supplementary voltages are V0, V1, V2, V3, V4, V5, V6, and V7. All supplementary voltages are negative. Among them, voltage V0 is greater than voltage V1, voltage V1 is greater than voltage V2, voltage V2 is greater than voltage V3, voltage V3 is greater than voltage V4, voltage V4 is greater than voltage V5, voltage V5 is greater than voltage V6, voltage V6 is greater than voltage V7, and so on. The compensation voltage list corresponding to the second brightness level ELVSS_2, the third brightness level ELVSS_3, ..., and the eleventh brightness level ELVSS_11 is similar to the compensation voltage list corresponding to the first brightness level ELVSS_1, and will not be repeated here.

[0069] Figure 7 Figure (a) shows the line graph of the compensation voltage in the compensation voltage list corresponding to the first brightness level ELVSS_1 as a function of the serial number. The larger the serial number in the compensation voltage list corresponding to the first brightness level ELVSS_1, the smaller the compensation voltage corresponding to that serial number. Similarly, the line graphs of the compensation voltage in the compensation voltage list corresponding to the second brightness level ELVSS_2, the third brightness level ELVSS_3, ..., and the eleventh brightness level ELVSS_11 (Figure (b)) are similar to those of the first brightness level ELVSS_1, and will not be described in detail here.

[0070] Figure 9 The diagram illustrates the change of the pixel anode initialization voltage Vint2 (target compensation voltage) during the scanning process of one frame. The scanning signal is scanned line by line from the nth line to the (n+m)th line. Vint2 outputs the pixel anode initialization voltage Vint2[n] during the scanning time period t[n] of the nth line, the pixel anode initialization voltage Vint2[n+1] during the scanning time period t[n+1] of the (n+1)th line, and so on, until the pixel anode initialization voltage Vint2[n+m] is output during the scanning time period t[n+m] of the (n+m)th line. Where Vint2[n]≥Vint2[n+1]≥……≥Vint2[n+m].

[0071] Optionally, in some embodiments, the display driver chip 10 is further configured to determine the target pixel region to which the target pixel region belongs based on the row number of the target pixel region in the display screen; obtain a first sequence number corresponding to the target pixel region from the target compensation voltage list, and obtain a first compensation voltage corresponding to the first sequence number; and obtain the target compensation voltage based on the row number of the target pixel region in the display screen, the first sequence number, and the first compensation voltage.

[0072] In this embodiment, the display driver chip 10 obtains the target compensation voltage based on the row number of the target pixel row in the display screen, the first sequence number, and the first compensation voltage. Then, based on the target compensation voltage, the driving voltage of the pixels in the target pixel row is compensated to obtain the target driving voltage. The target driving voltage is then used to drive the pixels in the target pixel row, thereby improving the consistency of brightness between the target pixel row and other pixel rows.

[0073] Optionally, in some embodiments, the display driver chip 10 is further configured to, when the target pixel row is a first row of power supplies in the target pixel region that is far from the display screen, use the first compensation voltage as the target compensation voltage; the display driver chip 10 is further configured to, when the target pixel row is any row other than the first row in the target pixel region and a second serial number exists in the target compensation voltage list, use the second compensation voltage corresponding to the second serial number as a reference compensation voltage, and obtain the target compensation voltage based on the first compensation voltage and the reference compensation voltage; the display driver chip 10 is further configured to, when the target pixel row is any row other than the first row in the target pixel region and a second serial number does not exist in the target compensation voltage list, use a preset reference compensation voltage as the reference compensation voltage, and obtain the target compensation voltage based on the first compensation voltage and the reference compensation voltage; wherein, the second serial number is the next serial number after the first serial number in the target compensation voltage list.

[0074] It should be noted that the preset reference compensation voltage is a pre-set voltage, for example, the preset reference compensation voltage is set to 0V.

[0075] In this embodiment, the target compensation voltage is obtained by the display driver chip 10, and then the driving voltage of the pixels in the target pixel row is compensated according to the target compensation voltage to obtain the target driving voltage. The target driving voltage is then used to drive the pixels in the target pixel row, thereby improving the consistency of brightness between the target pixel row and other pixel rows.

[0076] Optionally, in some embodiments, the display driver chip 10 is further configured to obtain the number of pixel rows in the target pixel region and the number of region rows in the target pixel region where the target pixel rows are located; obtain the ratio of the number of region rows to the number of pixel rows in the target pixel region; the display driver chip 10 is further configured to obtain the difference between the first compensation voltage and the reference compensation voltage; calculate the product of the ratio and the difference; and use the sum of the product and the first compensation voltage as the target compensation voltage.

[0077] In this embodiment, when the target pixel row is any row in the target pixel region other than the first row, the display driver chip 10 calculates the target compensation voltage based on the first compensation voltage and the reference compensation voltage.

[0078] For example, if the negative electrode voltage ELVSS of the pixel is -30V, the number of pixel rows in the target pixel region is 300, and the target pixel row is located in the 75th row of the target pixel region, then the ratio of the number of rows in the region to the number of pixel rows in the target pixel region is 0.25 (75 divided by 300). The first compensation voltage is -10V, and the reference compensation voltage is -22V. The difference between the first compensation voltage and the reference compensation voltage is 12V (-10V minus -22V). The product of the ratio and the difference is 3V (0.25 multiplied by 12V). The sum of the product and the first compensation voltage is -12V (-15V plus 3V). The sum of the product and the first compensation voltage is taken as the target compensation voltage, that is, the target compensation voltage is -12V.

[0079] It should be noted that the target pixel row is the number of rows in the target pixel region, that is, the number of rows in the target pixel region that the target pixel row is in.

[0080] In this embodiment, the order of scanning the pixel rows of the display screen is as follows: scanning begins with the pixel row furthest from the power supply of the display screen, and proceeds sequentially to the pixel row closest to the power supply. Therefore, the pixel row furthest from the power supply has the largest sequence number and the largest compensation voltage, while the pixel row closest to the power supply has the smallest sequence number and the smallest compensation voltage.

[0081] Optionally, in some embodiments, the first signal includes a target compensation voltage signal, a capacitor initialization voltage signal, and a data signal; the display driver chip 10 is specifically used to input the target compensation voltage signal to the pixel driving circuit 30 of the pixel 40 of the target pixel row, and to generate the capacitor initialization voltage signal and the data signal and input them to the pixel 40 of the target pixel row.

[0082] In this embodiment, the display driver chip 10 inputs the target compensation voltage signal to the pixel driving circuit 30 of the pixel 40 in the target pixel row, and generates a capacitor initialization voltage signal and a data signal and inputs them to the pixel driving circuit 30 in the target pixel row. The pixel driving circuit 30 in the target pixel row drives the corresponding pixel in the target pixel row to display according to the target compensation voltage signal, the capacitor initialization voltage signal and the data signal, so that the brightness of the target pixel row is consistent with the brightness of other pixel rows.

[0083] Specifically, in some embodiments, reference is made to Figure 3 The target compensation voltage signal is VINT1, the capacitor initialization voltage signal is Vint2, and the data signal is Data. See the previous explanation for details.

[0084] Optionally, in some embodiments, the auxiliary driving module includes a power management chip 21, a row scanning driving circuit 22, and a light-emitting row scanning driving circuit 23; the second signal includes a pixel positive voltage signal, a pixel negative voltage signal, a row scanning signal, and a light-emitting control signal; the power management chip 21 is used to generate the pixel positive voltage signal and the pixel negative voltage signal and input them to the pixel driving circuit 30 of the pixel 40 in the target pixel row; the row scanning driving circuit 22 is used to generate the row scanning signal and input it to the pixel driving circuit 30 of the pixel 40 in the target pixel row; the light-emitting row scanning driving circuit 23 is used to generate the light-emitting control signal and input it to the pixel driving circuit 30 of the pixel 40 in the target pixel row.

[0085] In this embodiment, the power management chip 21 generates a pixel positive voltage signal and a pixel negative voltage signal and inputs them to the pixel driving circuit 30 of the pixel 40 in the target pixel row; the row scanning driving circuit 22 generates a row scanning signal and inputs it to the pixel driving circuit 30 of the pixel 40 in the target pixel row; the light emission row scanning driving circuit 23 generates a light emission control signal and inputs it to the pixel driving circuit 30 of the pixel 40 in the target pixel row, so that the pixel driving circuit 30 of the pixel 40 in the target pixel row drives the corresponding pixel of the target pixel row to display according to the pixel positive voltage signal, the pixel negative voltage signal, the row scanning signal and the light emission control signal, so that the brightness of the target pixel row is consistent with the brightness of other pixel rows.

[0086] Specifically, in some embodiments, reference is made to Figure 3 The pixel positive voltage signal is ELVDD, the pixel negative voltage signal is ELVSS, the line scan signal is Scan (including Nscan, Nscan[n-1], Pscan, etc.), and the light emission control signal is EM. For details, please refer to the above.

[0087] In summary, in this embodiment, the display driver chip 10 obtains the preset brightness level of the display screen, then determines the target compensation voltage list matching the preset brightness level from a set of multiple preset compensation voltage lists. Next, based on the relationship between the row number of the target pixel row to be scanned in the display screen and its sequence number in the target compensation voltage list, the target compensation voltage corresponding to the target pixel row is obtained. A first signal containing the target compensation voltage is input to the pixel driving circuit 30 of the pixel 40 in the target pixel row. The auxiliary driving module generates a second signal and inputs it to the pixel driving circuit 30 of the pixel 40 in the target pixel row. The pixel driving circuit 30 of the pixel 40 in the target pixel row drives the corresponding pixels of the target pixel row to display according to the first and second signals, making the brightness of the target pixel row consistent with the brightness of other pixel rows. This improves the consistency of the brightness distribution of the display screen, thereby improving the display effect and solving the problem in related technologies where pixel rows farther from the power supply of the display screen receive smaller driving voltages, leading to inconsistent brightness distribution and poor display effect. The brightness compensation method for a display screen provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0088] Figure 2 This is a flowchart illustrating the steps of a brightness compensation method for a display screen provided in an embodiment of this application, as follows: Figure 2 As shown, the method may include:

[0089] Step 101: Obtain the preset brightness level of the display screen.

[0090] The pixels of the display screen are arranged in an array, and the display screen includes multiple pixel rows.

[0091] The implementation method for this step is similar to the aforementioned process, and will not be repeated here.

[0092] Step 102: Determine a target compensation voltage list that matches the preset brightness level from a set consisting of multiple preset compensation voltage lists.

[0093] Each of the compensation voltage lists has a corresponding brightness level; the compensation voltage list contains multiple compensation voltages, and each compensation voltage has a corresponding serial number.

[0094] The implementation method for this step is similar to the aforementioned process, and will not be repeated here.

[0095] Step 103: Based on the relationship between the row number of the target pixel row to be scanned in the display screen and the serial number in the target compensation voltage list, obtain the target compensation voltage corresponding to the target pixel row.

[0096] The implementation method for this step is similar to the aforementioned process, and will not be repeated here.

[0097] Step 104: Input a first signal containing the target compensation voltage to the pixel driving circuit of the pixel in the target pixel row, so that the pixel driving circuit of the pixel in the target pixel row drives the corresponding pixel of the target pixel row to display according to the first signal, so that the brightness of the target pixel row is consistent with the brightness of other pixel rows.

[0098] The implementation method for this step is similar to the aforementioned process, and will not be repeated here.

[0099] In summary, in this embodiment, a preset brightness level of the display screen is obtained; a target compensation voltage list matching the preset brightness level is determined from a set of multiple preset compensation voltage lists; each compensation voltage list has a corresponding brightness level; the compensation voltage list contains multiple compensation voltages, each compensation voltage having a corresponding serial number; a target compensation voltage corresponding to the target pixel row is obtained based on the relationship between the row number of the target pixel row to be scanned in the display screen and the serial number in the target compensation voltage list; a first signal containing the target compensation voltage is input to the pixel driving circuit of the pixel in the target pixel row, so that the pixel driving circuit of the pixel in the target pixel row drives the pixel corresponding to the target pixel row to display according to the first signal, so that the brightness of the target pixel row is consistent with the brightness of other pixel rows, thereby improving the consistency of the brightness distribution of the display screen, and thus improving the display screen's display effect. This solves the problem in related technologies where pixel rows farther from the power supply of the display screen receive smaller driving voltages from the power supply, resulting in inconsistent brightness distribution of the display screen and poor display effect.

[0100] Optional, refer to Figure 8In some embodiments, the brightness compensation system for a display screen provided in this application includes a brightness level module, a data acquisition module, a memory, a transmission module, a digital-to-analog conversion module, and a display module. The brightness compensation system operates as follows: the data acquisition module retrieves the corresponding target compensation voltage list from the memory (which stores multiple preset compensation voltage lists) according to the preset brightness level provided by the brightness level module. Within the current frame, it outputs the target compensation voltage to the transmission module in a timing sequence. After receiving the target compensation voltage from the data acquisition module, the transmission module forwards the target compensation voltage to the digital-to-analog converter module (DAC). The DAC converts the digital voltage of the target compensation voltage into an analog voltage and outputs the analog voltage to the Vint2 network in the display module. Based on the target compensation voltage, the driving voltage of the pixels in the target pixel row is compensated to obtain the target driving voltage, which is then used to drive the pixels in the target pixel row.

[0101] In related technologies, refer to Figure 10 The pixel anode initialization voltage Vint2 is a fixed value. The pixel anode initialization voltage Vint2 is equal to the pixel negative voltage ELVSS. The pixel positive voltage ELVDD of the pixel row gradually increases as the distance between the pixel row and the power supply of the display decreases. This creates a voltage difference in the pixel positive voltage ELVDD between the pixel rows (the voltage drop IP Drop of the pixel positive voltage ELVDD of the pixel row), which in turn leads to different driving voltages between the pixel rows, resulting in differences in brightness (brightness value) between the pixel rows.

[0102] In the embodiments of this application, reference is made to Figure 11 The positive voltage ELVDD of the pixel row gradually increases as the distance between the pixel row and the power supply of the display decreases. The greater the distance between the pixel row and the power supply of the display, the greater the value of the pixel anode initial voltage Vint2. The pixel anode initial voltage Vint2 is greater than the pixel negative voltage ELVSS. Therefore, the greater the distance between the pixel row and the power supply of the display, the smaller the positive voltage ELVDD of the pixel row, but the greater the value of the pixel anode initial voltage Vint2. The voltage difference between the pixel anode initial voltage Vint2 and the pixel negative voltage ELVSS cancels out the voltage drop IP Drop of the positive voltage ELVDD of the pixel row.

[0103] In summary, in this embodiment, a preset brightness level of the display screen is obtained; a target compensation voltage list matching the preset brightness level is determined from a set of multiple preset compensation voltage lists; each compensation voltage list has a corresponding brightness level; the compensation voltage list contains multiple compensation voltages, each compensation voltage having a corresponding serial number; a target compensation voltage corresponding to the target pixel row is obtained based on the relationship between the row number of the target pixel row to be scanned in the display screen and the serial number in the target compensation voltage list; a first signal containing the target compensation voltage is input to the pixel driving circuit of the pixel in the target pixel row, so that the pixel driving circuit of the pixel in the target pixel row drives the pixel corresponding to the target pixel row to display according to the first signal, so that the brightness of the target pixel row is consistent with the brightness of other pixel rows, thereby improving the consistency of the brightness distribution of the display screen, and thus improving the display screen's display effect. This solves the problem in related technologies where pixel rows farther from the power supply of the display screen receive smaller driving voltages from the power supply, resulting in inconsistent brightness distribution of the display screen and poor display effect.

[0104] Optional, such as Figure 12 As shown, this application embodiment also provides an electronic device M00, including a processor M01 and a memory M02. The memory M02 stores a program or instructions that can run on the processor M01. When the program or instructions are executed by the processor M01, they implement the various steps of the brightness compensation method embodiment of the above-mentioned display screen and can achieve the same technical effect. To avoid repetition, they will not be described again here.

[0105] It should be noted that the electronic devices in the embodiments of this application include the mobile electronic devices and non-mobile electronic devices described above.

[0106] Figure 13 A schematic diagram of the hardware structure of an electronic device to implement an embodiment of this application.

[0107] The electronic device 400 includes, but is not limited to, components such as: radio frequency unit 401, network module 402, audio output unit 403, input unit 404, sensor 405, display unit 406, user input unit 407, interface unit 408, memory 409, and processor 410.

[0108] Those skilled in the art will understand that the electronic device 400 may also include a power supply (such as a battery) for supplying power to various components. The power supply may be logically connected to the processor 410 through a power management system, thereby enabling functions such as managing charging, discharging, and power consumption through the power management system. Figure 13The electronic device structure shown does not constitute a limitation on the electronic device. The electronic device may include more or fewer components than shown, or combine certain components, or have different component arrangements, which will not be elaborated here.

[0109] The processor 410 is used to obtain the preset brightness level of the display screen;

[0110] From a set of multiple preset compensation voltage lists, a target compensation voltage list matching the preset brightness level is determined; each compensation voltage list has a corresponding brightness level; the compensation voltage list contains multiple compensation voltages, and each compensation voltage has a corresponding serial number.

[0111] Based on the relationship between the row number of the target pixel row to be scanned in the display screen and the serial number in the target compensation voltage list, the target compensation voltage corresponding to the target pixel row is obtained;

[0112] A first signal containing the target compensation voltage is input to the pixel driving circuit of the pixel in the target pixel row, so that the pixel driving circuit of the pixel in the target pixel row drives the pixel corresponding to the target pixel row to display according to the first signal, so that the brightness of the target pixel row is consistent with the brightness of other pixel rows.

[0113] The pixels of the display screen are arranged in an array, and the display screen includes multiple pixel rows.

[0114] In this embodiment, a preset brightness level of the display screen is obtained; a target compensation voltage list matching the preset brightness level is determined from a set of multiple preset compensation voltage lists; each compensation voltage list has a corresponding brightness level; the compensation voltage list contains multiple compensation voltages, each compensation voltage having a corresponding sequence number; a target compensation voltage corresponding to the target pixel row is obtained based on the relationship between the row number of the target pixel row to be scanned in the display screen and the sequence number in the target compensation voltage list; a first signal containing the target compensation voltage is input to the pixel driving circuit of the pixel in the target pixel row, so that the pixel driving circuit of the pixel in the target pixel row drives the pixel corresponding to the target pixel row to display according to the first signal, so that the brightness of the target pixel row is consistent with the brightness of other pixel rows, thereby improving the consistency of the brightness distribution of the display screen, and thus improving the display effect of the display screen. This solves the problem in the related technology that the pixel row farther away from the power supply of the display screen receives a smaller driving voltage from the power supply, resulting in inconsistent brightness distribution of the display screen and poor display effect.

[0115] It should be understood that, in this embodiment, the input unit 404 may include a graphics processing unit (GPU) 4041 and a microphone 4042. The GPU 4041 processes image data of still images or videos obtained by an image capture device (such as a camera) in video capture mode or image capture mode. The display unit 406 may include a display panel 4061, which may be configured in the form of a liquid crystal display, an organic light-emitting diode, or the like. The user input unit 407 includes at least one of a touch panel 4071 and other input devices 4072. The touch panel 4071 is also called a touch screen. The touch panel 4071 may include a touch detection device and a touch controller. Other input devices 4072 may include, but are not limited to, physical keyboards, function keys (such as volume control buttons, power buttons, etc.), trackballs, mice, and joysticks, which will not be described in detail here.

[0116] The memory 409 can be used to store software programs and various data. The memory 409 may primarily include a first storage area for storing programs or instructions and a second storage area for storing data. The first storage area may store the operating system, application programs or instructions required for at least one function (such as sound playback, image playback, etc.). Furthermore, the memory 409 may include volatile memory or non-volatile memory, or both. The non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. Volatile memory can be random access memory (RAM), static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct memory bus RAM (DRRAM). The memory 409 in the embodiments of this application includes, but is not limited to, these and any other suitable types of memory.

[0117] Processor 410 may include one or more processing units; optionally, processor 410 integrates an application processor and a modem processor, wherein the application processor mainly handles operations involving the operating system, user interface, and applications, and the modem processor mainly handles wireless communication signals, such as a baseband processor. It is understood that the aforementioned modem processor may also not be integrated into processor 410.

[0118] This application also provides a readable storage medium storing a program or instructions. When the program or instructions are executed by a processor, they implement the various processes of the above-described brightness compensation method embodiment for the display screen and achieve the same technical effect. To avoid repetition, they will not be described again here.

[0119] The processor is the processor in the electronic device described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0120] This application embodiment also provides a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the various processes of the above-described brightness compensation method embodiment for the display screen, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0121] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0122] This application provides a computer program product, which is stored in a storage medium and executed by at least one processor to implement the various processes of the brightness compensation method embodiment of the display screen described above, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0123] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0124] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a computer software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0125] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A display screen, characterized in that, The pixels of the display screen are arranged in an array, and the display screen includes multiple pixel rows, a display driver chip, and an auxiliary driver module. Each pixel has a corresponding pixel driver circuit. The pixel is connected to the corresponding pixel driving circuit, the display driving chip is connected to each pixel driving circuit, and the auxiliary driving module is connected to each pixel driving circuit; The display driver chip is used to obtain the preset brightness level of the display screen; From a set consisting of multiple preset compensation voltage lists, a target compensation voltage list matching the preset brightness level is determined; based on the relationship between the row number of the target pixel row to be scanned in the display screen and the serial number in the target compensation voltage list, the target compensation voltage corresponding to the target pixel row is obtained; The first signal containing the target compensation voltage is input to the pixel driving circuit of the pixel in the target pixel row; each compensation voltage list has a corresponding brightness level; The compensation voltage list contains multiple compensation voltages, and each compensation voltage has a corresponding serial number. The auxiliary driving module is used to generate a second signal and input it to the pixel driving circuit of the pixel in the target pixel row; The pixel driving circuit of the target pixel row is used to drive the pixels corresponding to the target pixel row to display according to the first signal and the second signal, so that the brightness of the target pixel row is consistent with the brightness of other pixel rows; Specifically, the display driver chip is used to divide the display area of ​​the display screen into multiple different pixel regions, each pixel region including multiple consecutive pixel rows; each pixel region corresponds to a sequence number; For each brightness level, a corresponding compensation voltage is set for the pixel region corresponding to each number; all the compensation voltages and numbers corresponding to each brightness level are combined to form a compensation voltage list for each brightness level.

2. The display screen according to claim 1, characterized in that, The display driver chip is further configured to determine the target pixel region to which the target pixel region belongs based on the row number of the target pixel region in the display screen; obtain a first serial number corresponding to the target pixel region from the target compensation voltage list, and obtain a first compensation voltage corresponding to the first serial number; and obtain the target compensation voltage based on the row number of the target pixel region in the display screen, the first serial number, and the first compensation voltage.

3. The display screen according to claim 2, characterized in that, The display driver chip is further configured to use the first compensation voltage as the target compensation voltage when the target pixel row is the first row of the power supply in the target pixel region that is far away from the display screen. The display driver chip is further configured to, when the target pixel row is another row in the target pixel region other than the first row, and a second serial number exists in the target compensation voltage list, use the second compensation voltage corresponding to the second serial number as a reference compensation voltage, and obtain the target compensation voltage based on the first compensation voltage and the reference compensation voltage; The display driver chip is further configured to, when the target pixel row is any row other than the first row in the target pixel region and the second serial number is not present in the target compensation voltage list, use a preset reference compensation voltage as the reference compensation voltage and obtain the target compensation voltage based on the first compensation voltage and the reference compensation voltage; Wherein, the second serial number is the next serial number after the first serial number in the target compensation voltage list.

4. The display screen according to claim 3, characterized in that, The display driver chip is further configured to obtain the number of pixel rows in the target pixel region, and obtain the number of region rows in the target pixel region where the target pixel row is located; and obtain the ratio of the number of region rows to the number of pixel rows in the target pixel region; The display driver chip is further configured to obtain the difference between the first compensation voltage and the reference compensation voltage; Calculate the product of the ratio and the difference; use the sum of the product and the first compensation voltage as the target compensation voltage.

5. The display screen according to claim 1, characterized in that, The greater the distance between the pixel region and the power supply of the display screen, the larger the serial number of the pixel region, and the larger the compensation voltage corresponding to the serial number of the pixel region.

6. The display screen according to claim 1, characterized in that, The first signal includes a target compensation voltage signal, a capacitor initialization voltage signal, and a data signal; the display driver chip is specifically used to input the target compensation voltage signal to the pixel driving circuit of the pixel of the target pixel row, and to generate the capacitor initialization voltage signal and the data signal and input them to the pixel of the target pixel row.

7. The display screen according to claim 1, characterized in that, The auxiliary driving module includes a power management chip, a row scanning driving circuit, and a light-emitting row scanning driving circuit; the second signal includes a pixel positive voltage signal, a pixel negative voltage signal, a row scanning signal, and a light-emitting control signal; the power management chip is used to generate the pixel positive voltage signal and the pixel negative voltage signal and input them to the pixel driving circuit of the pixel in the target pixel row; The row scan driving circuit is used to generate the row scan signal and input it to the pixel driving circuit of the pixel in the target pixel row; The light-emitting row scanning driving circuit is used to generate the light-emitting control signal and input it to the pixel driving circuit of the target pixel row.

8. A brightness compensation method for a display screen, applied to a display driver chip of the display screen, characterized in that, The pixels of the display screen are arranged in an array, the display screen includes multiple pixel rows, and the method includes: Obtain the preset brightness level of the display screen; From a set of multiple preset compensation voltage lists, a target compensation voltage list matching the preset brightness level is determined; each compensation voltage list has a corresponding brightness level; the compensation voltage list contains multiple compensation voltages, and each compensation voltage has a corresponding serial number. Based on the relationship between the row number of the target pixel row to be scanned in the display screen and the serial number in the target compensation voltage list, the target compensation voltage corresponding to the target pixel row is obtained; A first signal containing the target compensation voltage is input to the pixel driving circuit of the pixel in the target pixel row, so that the pixel driving circuit of the pixel in the target pixel row drives the pixel corresponding to the target pixel row to display according to the first signal, so that the brightness of the target pixel row is consistent with the brightness of other pixel rows. The method further includes: The display area of ​​the display screen is divided into multiple different pixel regions, each pixel region including multiple consecutive pixel rows; each pixel region corresponds to a sequence number; for each brightness level, a corresponding compensation voltage is set for each pixel region corresponding to the sequence number; all the compensation voltages and sequence numbers corresponding to each brightness level are combined to form a compensation voltage list for each brightness level.

9. An electronic device, characterized in that, It includes a processor and a memory, the memory storing a program or instructions that can run on the processor, the program or instructions being executed by the processor to implement the steps of the brightness compensation method for the display screen as described in claim 8.

10. A computer-readable storage medium, characterized in that, The readable storage medium stores a program or instructions that, when executed by a processor, implement the steps of the brightness compensation method for the display screen as described in claim 9.

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