Method, device and storage medium for improving brightness jump of OLED display screen

Abstract

The present invention relates to the technical field of OLED display screens, and discloses a method, device and storage medium for improving brightness jumps of OLED display screens. The method comprises: obtaining brightness change information of an OLED display screen detected by a photoresistor; converting an AD analog quantity to a numerical quantity according to the brightness change information to obtain brightness numerical information; comparing the brightness numerical information with preset standard numerical information to obtain difference information between the brightness numerical information and the preset standard numerical information; inputting the difference information into a pre-configured LQR regulator control model, and outputting adjustment information to control the voltage value of the OLED display screen according to the adjustment information. The method realizes the detection of the brightness of an OLED display screen, improves the problem of brightness jumps of an OLED display screen, and improves the stability and reliability of the product.

Description

Technical Field

[0001] The present invention relates to the technical field of OLED display screens, and in particular to a method, a device and a storage medium for improving brightness jumps of OLED display screens. Background Art

[0002] At present, OLED (organic light-emitting diode) display technology is an advanced display technology. It achieves high contrast, wide color gamut and fast response time by using organic material layers to self-luminate under the action of an electric field. It is also light, flexible and low in energy consumption. It is widely used in consumer electronics such as smart phones, TVs, watches, etc., showing broad development prospects and huge market potential.

[0003] In one existing technology, PWM (pulse width modulation) technology controls the brightness of OLED displays by adjusting the duty cycle of current pulses, where the duty cycle is the ratio of the luminous time to the total time. When optimizing PWM technology to adjust brightness jumps, the PWM frequency can be increased to make it difficult for the human eye to detect small changes in brightness, while the duty cycle can be accurately adjusted to achieve a smoother brightness transition and reduce brightness mutations.

[0004] The process of adjusting the brightness jump using PWM technology is not obvious, and users can still perceive the flickering of the screen. In rapidly changing scenes, it will cause color distortion and affect the user experience. Summary of the invention

[0005] The present invention provides a method, a device and a storage medium for improving brightness jump of an OLED display screen, so as to improve the problem of brightness jump of an OLED display screen and enhance user experience.

[0006] In a first aspect, in order to solve the above technical problems, the present invention provides a method for improving brightness jump of an OLED display screen, comprising:

[0007] Get the brightness change information of the OLED display screen detected by the photoresistor;

[0008] According to the brightness change information, convert the AD analog quantity into a numerical quantity to obtain the brightness numerical information;

[0009] Comparing the brightness numerical information with preset standard numerical information to obtain difference information between the brightness numerical information and the preset standard numerical information;

[0010] The difference information is input into a pre-configured LQR regulator control model, and adjustment information is output to control the voltage value of the OLED display screen according to the adjustment information.

[0011] Preferably, the change in the resistance value inside the photoresistor is converted into voltage value information, and the voltage value information is marked as brightness change information.

[0012] Preferably, the brightness change information is quantized to obtain finite value set information;

[0013] Encoding the finite value set information and converting it into digital information, and marking the digital information as brightness numerical information;

[0014] Wherein, the digital information is represented in binary digital form.

[0015] Preferably, second brightness change information that changes continuously over time is obtained according to the brightness change information;

[0016] According to the second brightness change information, rounding and truncation are performed to obtain third brightness change information that changes discretely over time;

[0017] Performing normalization processing according to the third brightness change information to obtain finite value set information;

[0018] The finite value set information is a value that changes over time.

[0019] Preferably, according to the brightness numerical information and the preset standard numerical information, a difference is made between the brightness numerical information and the preset standard numerical information at the same time to obtain difference information between the brightness numerical information and the preset standard numerical information.

[0020] Preferably, an OLED screen brightness model is constructed according to the brightness change information and voltages on a plurality of OLED units on the OLED screen;

[0021] Constructing a low-pass filter transfer function according to the difference information;

[0022] The LQR regulator control model is determined based on the screen brightness model and the low-pass filter transfer function.

[0023] Preferably, a state function of an initial linear quadratic regulator of a nonlinear variable is constructed according to the screen brightness model and the low-pass filter transfer function;

[0024] The brightness numerical information, the positions of the plurality of OLED units and the voltages on the plurality of OLED units are used as state parameters;

[0025] The LQR regulator control model is determined according to the state function and the state parameter.

[0026] Preferably, according to the adjustment information, the DA numerical value is converted into an analog value to obtain an adjusted voltage value;

[0027] According to the adjusted voltage value, the voltage value of the OLED display screen is controlled.

[0028] A second aspect of an embodiment of the present invention provides a device for improving brightness jump of an OLED display screen, comprising:

[0029] A data acquisition module is used to obtain the brightness change information of the OLED display screen detected by the photoresistor;

[0030] An information conversion module, used to convert the AD analog quantity into a numerical quantity according to the brightness change information, so as to obtain the brightness numerical information;

[0031] A numerical calculation module, used for comparing the brightness numerical information with preset standard numerical information to obtain difference information between the brightness numerical information and the preset standard numerical information;

[0032] The command control module is used to input the difference information into a pre-configured LQR regulator control model and output adjustment information to control the voltage value of the OLED display screen according to the adjustment information.

[0033] A third aspect of an embodiment of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium includes a stored computer program, wherein when the computer program is running, the device where the computer-readable storage medium is located is controlled to execute the method for improving the brightness jump of an OLED display screen described in the first aspect above.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] The present invention provides a method, device and storage medium for improving brightness jump of an OLED display screen. The method is executed by a controller, including obtaining brightness change information of an OLED display screen detected by a photoresistor; converting an AD analog quantity into a numerical quantity according to the brightness change information to obtain brightness numerical information; comparing the brightness numerical information with preset standard numerical information to obtain difference information between the brightness numerical information and the preset standard numerical information; inputting the difference information into a pre-configured LQR regulator control model, and outputting adjustment information to control the voltage value of the OLED display screen according to the adjustment information.

[0036] The photoresistor is used to detect the change of the brightness of the OLED display in real time, and the brightness change is analyzed. When the brightness jump information of the preset OLED screen is greatly different, the voltage of each small unit of the screen OLED is adjusted. In this process, the photoresistor detects the change of the brightness of the OLED display screen in real time, and can determine whether the display screen has a brightness jump problem. The LQR regulator control model can achieve a smoother transition of the brightness of the OLED display screen. The whole process not only realizes the detection of the brightness of the OLED display screen, but also solves the problem of brightness jump of the display screen, and improves the stability and reliability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a schematic flow chart of a method for improving brightness jump of an OLED display screen provided by an embodiment of the present invention;

[0038] Figure 2 1 is a flow chart of a process of converting an AD analog quantity to a numerical quantity provided by an embodiment of the present invention;

[0039] Figure 3 It is a schematic diagram of the LQR regulator control model training process provided by an embodiment of the present invention;

[0040] Figure 4 The present invention provides a method for improving brightness jumps of an OLED display screen. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] Reference Figure 1 The first embodiment of the present invention provides a method for improving brightness jump of an OLED display screen, comprising the following steps:

[0043] S11, obtaining brightness change information of the OLED display screen detected by the photoresistor.

[0044] S12, converting the AD analog quantity into a numerical quantity according to the brightness change information to obtain brightness numerical information.

[0045] S13, comparing the brightness numerical information with preset standard numerical information to obtain difference information between the brightness numerical information and the preset standard numerical information.

[0046] S14, inputting the difference information into a pre-configured LQR regulator control model, and outputting adjustment information to control the voltage value of the OLED display screen according to the adjustment information.

[0047] Among them, it should be noted that the OLED (organic light-emitting diode) display is an advanced display technology with the characteristics of high contrast, low power consumption, fast response time and thin design. However, there are also some challenges in brightness control of OLED displays, and controlling brightness jumps is an important aspect. OLED screens emit light through organic light-emitting materials. Excessive brightness will cause the screen temperature to rise, accelerate material aging, and shorten the service life. In addition, excessive brightness may irritate the user's eyes and affect vision health in some cases. Therefore, by intelligently adjusting the brightness, it can ensure that the screen can provide a comfortable viewing experience in different environments, while reducing energy consumption and achieving energy conservation and environmental protection. Brightness control technology can automatically adjust the screen brightness according to changes in ambient light and user preferences, reduce unnecessary light pollution, improve the screen display effect, and ensure that the screen remains clear and vivid during long-term use.

[0048] In the embodiment of the present invention, the brightness change of the OLED display screen is detected in real time by a photoresistor, and the brightness change is analyzed. When the difference with the preset OLED screen brightness jump information is large, the voltage of each small unit of the screen OLED is adjusted. In this process, the photoresistor detects the change of the brightness of the OLED display screen in real time, and can determine whether the display screen has a brightness jump problem. The LQR regulator control model can achieve a smoother transition of the brightness of the OLED display screen. The whole process not only realizes the detection of the brightness of the OLED display screen, but also solves the problem of brightness jump of the display screen, and improves the stability and reliability of the product.

[0049] In step S11, the brightness change information of the OLED display screen detected by the photoresistor is obtained.

[0050] It should be noted that photoresistors are common devices for detecting light intensity in modern industry. Photoresistors are resistors made of photosensitive materials, and their resistance value changes with changes in light intensity. This characteristic makes photoresistors widely used in automatic control and detection systems, such as automatic lighting, photometers, camera exposure control, etc. Photoresistors are usually made of semiconductor materials, the most common of which are cadmium sulfide (CdS), lead selenide (PbS), etc. In the absence of light or weak light, the resistance value of the photoresistor is large; when the light intensity increases, the resistance value will decrease significantly. This change is the basis for the photoresistor to realize the conversion of optical signals into electrical signals in the circuit.

[0051] Illustratively, the photoresistor in this embodiment is made of lead sulfide (PbS) material. The resistor made of this material has good sensitivity, can respond quickly to changes in light intensity, and convert changes in the resistance value inside the photoresistor into voltage value information, and mark the voltage value information as brightness change information.

[0052] like Figure 2 As shown, step S12 converts the AD analog quantity into a numerical quantity according to the brightness change information to obtain the brightness numerical information.

[0053] S121, quantizing the brightness change information to obtain finite value set information;

[0054] S122, encoding the finite value set information and converting it into digital information, and marking the digital information as brightness numerical information.

[0055] It should be noted that the first step of analog-to-digital conversion is sampling, which obtains discrete sampling points of the analog signal of brightness change information within a certain time interval. Sampling can be performed in different ways, including periodic sampling, intermittent sampling, and instant sampling. The sampling frequency determines the number of samples collected per second, usually in Hertz (Hz). After sampling, the analog signal of brightness change information is still continuous and needs to be quantized into discrete digital values. The quantization process maps the amplitude of the sampling point to discrete levels, so it involves the selection of the quantizer and the determination of the quantization level. Usually, equidistant discrete levels are used, and ADC (Analog-to-Digital Converter) is used to perform the quantization operation. The quantized sample values ​​need to be encoded and represented as binary data for easy storage and transmission. The encoded binary data can be further processed and analyzed by a digital signal processor, microcontroller or other digital system.

[0056] Among them, sampling and quantization accuracy affect the resolution of AD conversion. Resolution determines the number of discrete levels that can be represented. The higher the resolution, the finer the representation capability, which can provide more accurate digital representation. Accuracy refers to the degree of closeness of the AD converter output data to the actual analog signal.

[0057] In step S121, the brightness change information is quantized to obtain finite value set information, including:

[0058] According to the brightness change information, second brightness change information that changes continuously with time is obtained; according to the second brightness change information, rounding and truncation are performed to obtain third brightness change information that changes discretely with time; according to the third brightness change information, normalization processing is performed to obtain finite value set information; the finite value set information is a value that changes with time.

[0059] The second brightness change information is numerical information after considering the time parameter, and the third brightness change information is a discrete function that changes with time, and the discrete function only has a value at a specific time. In this embodiment, the third brightness change information is normalized to convert the numerical information into a value between 0-255.

[0060] In step 122, the finite value set information is encoded and converted into digital information, and the digital information is marked as brightness numerical information, including:

[0061] The quantized numerical information is encoded into a binary digital code. This process involves a specific number of bits, such as 8 bits, 16 bits or higher. The higher the number of bits, the wider the range of values ​​that can be represented and the higher the resolution. Ultimately, this binary digital code is used to represent the specific light intensity amplitude of the original light analog signal, thereby completing the conversion from analog to digital.

[0062] Exemplarily, in this embodiment, an 8-bit AD converter is selected for sampling. The converter uses a periodic sampling method with a period of 0.05s and a frequency of 20HZ. After sampling, quantization processing is performed. The processed finite value set information is 0-255. Finally, the quantized value information is encoded and converted into binary data for storage and transmission.

[0063] In step S13, the brightness numerical information is compared with the preset standard numerical information to obtain the difference information between the brightness numerical information and the preset standard numerical information, including:

[0064] According to the brightness numerical information and the preset standard numerical information, a difference is made between the brightness numerical information and the preset standard numerical information at the same time to obtain difference information between the brightness numerical information and the preset standard numerical information.

[0065] Exemplarily, the preset standard value information is pre-set by the user, and may be a brightness change of 100 brightness value units per second, wherein the brightness value unit is the unit value of the brightness value information of the photoresistor, and the present invention does not make any specific limitation on this.

[0066] It should be noted that the brightness numerical information is compared with the preset standard numerical information, specifically, the binary numerical information is subtracted from the binary preset standard numerical information to obtain the difference information. In this example, the binary value is 8 bits, and the 8-bit binary numbers are subtracted from each other and then stored as 8-bit binary numbers.

[0067] like Figure 3 As shown, in step S14, the difference information is input into a pre-configured LQR regulator control model, and adjustment information is output to control the voltage value of the OLED display screen according to the adjustment information, including:

[0068] S141, constructing an OLED screen brightness model according to the brightness change information and voltages on a plurality of OLED units on the OLED screen;

[0069] S142, constructing a low-pass filter transfer function according to the difference information;

[0070] S143, determining the LQR regulator control model according to the screen brightness model and the low-pass filter transfer function.

[0071] It should be noted that the LQR regulator control model inputs the screen brightness model and the low-pass filter transfer function as parameters, analyzes the two models, obtains the LQR cost function, minimizes the cost function through iterative calculation, and then outputs the calculation result as an adjustment value to adjust the voltage of the OLED display.

[0072] In step S141, an OLED screen brightness model is constructed according to the brightness change information and the voltages on a plurality of OLED units on the OLED screen, including:

[0073] The change of the screen brightness is numerical information that changes with time. The voltages on the multiple OLED units on the OLED screen are determined by the controller. In this embodiment, the numerical information is determined by the following calculation formula:

[0074]

[0075] in, For OLED screen brightness model, is the brightness change information over time, is the voltage value on the OLED unit on the OLED screen, is the horizontal coordinate of the OLED unit on the OLED screen, is the ordinate of the OLED unit on the OLED screen, Represents the time parameter.

[0076] In this embodiment, the horizontal coordinate direction of the OLED unit is the long side of the OLED screen, and the vertical coordinate direction of the OLED unit is the short side of the OLED screen.

[0077] In step S142, a low-pass filter transfer function is constructed according to the difference information. In the embodiment of the present invention, the relationship between the voltage of the OLED display screen to be controlled and the voltage of the ideal OLED display screen can be used to construct the low-pass filter transfer function, and the low-pass filter transfer function is as follows:

[0078]

[0079] In the above formula, is the low-pass filter transfer function, is the frequency of the OLED display, is the target transfer function, It is the difference information between the brightness numerical information and the preset standard numerical information at the same time.

[0080] In step S143, the LQR regulator control model is determined according to the screen brightness model and the low-pass filter transfer function, including: constructing a state function of an initial linear quadratic regulator of nonlinear variables according to the screen brightness model and the low-pass filter transfer function; taking the brightness digitization information, the positions of multiple OLED units, and the voltages on multiple OLED units as state parameters; and determining the LQR regulator control model according to the state function and the state parameters.

[0081] Specifically, it includes:

[0082] The target voltage change of the OLED display is set as follows:

[0083]

[0084] In the formula, is the adjustment voltage value of the OLED display, Preset matrix for the system, is a linear feedback regulator parameter of the present invention.

[0085] It should be noted that Preset matrix for the system, pre-set by the user, linear feedback controller , then the adjustment voltage value of the OLED display can be written as:

[0086]

[0087] In the formula, It is represented as a parameter value of the linear feedback device, indicating the step value of the feedback. Indicates the adjustment voltage value of the OLED display. The system preset matrix is ​​preset by the user. Brightness model for OLED screens.

[0088] In this process, in order to achieve the best control effect of the controller, the present invention defines a cost function :

[0089] (1)

[0090] In the formula, and There are two diagonal parameter matrices, which determine the OLED screen brightness model. and linear feedback regulator The importance of represents the time parameter, is the transpose of the OLED screen brightness model, is the transposed matrix of the linear feedback regulator vector.

[0091] It should be noted that the cost function When it is minimum, the best screen brightness jump can be obtained. For formula (1), the present invention defines an auxiliary constant matrix P, which has the following formula:

[0092] (2)

[0093] In the formula, represents the auxiliary constant matrix, is the transpose of the OLED screen brightness model, is the transposed matrix of the linear feedback regulator vector, is the linear feedback regulator vector, For OLED screen brightness model, and There are two diagonal parameter matrices, which determine the OLED screen brightness model. and linear feedback regulator The importance of.

[0094] Substituting (2) into (1) yields

[0095] (3)

[0096] In the formula, is the transpose of the OLED screen brightness model, represents the auxiliary constant matrix, is the OLED screen brightness model. From (3), we can see that in order to make the cost function Minimum, that is, The parameter matrix is ​​the smallest. Expanding the differential term on the left side of equation (2) yields:

[0097] (4)

[0098]

[0099] In the formula, is the transpose of the OLED screen brightness model, represents the difference between the preset matrix coefficients and the feedback controller coefficients, represents the transpose of the difference between the preset matrix coefficients and the feedback controller coefficients, For OLED screen brightness model, It is represented as a parameter value of the linear feedback device, indicating the step value of the feedback. is represented as the transpose of a parameter value of the linear feedback controller, represents the auxiliary constant matrix, and are two diagonal parameter matrices, Preset matrix for the system.

[0100] The matrix of (4) is simplified twice to obtain the following formula:

[0101]

[0102] In the formula, Preset matrix for the system, and are two diagonal parameter matrices, is the inverse operation of the diagonal matrix, The transpose of the system preset matrix, represents the auxiliary constant matrix. From the above formula, we can solve the auxiliary matrix .

[0103] Then, use the following formula

[0104]

[0105] In the formula, It is represented as a parameter value of the linear feedback device, indicating the step value of the feedback; is the inverse operation of the diagonal matrix The transpose of the system preset matrix, Represents the auxiliary constant matrix. The coefficients of the optimized feedback controller can be calculated from the above formula: , after obtaining , After equalizing the coefficients, substitute into formula (3) to obtain the cost function The minimum value of . Using the cost function Perform secondary linear feedback to obtain the adjusted OLED display voltage change value.

[0106] It should be further noted that controlling the voltage value of the OLED display screen according to the adjustment information includes:

[0107] According to the adjustment information, the DA numerical value is converted into an analog value to obtain an adjusted voltage value; and according to the adjusted voltage value, the voltage value of the OLED display screen is controlled.

[0108] Exemplarily, the conversion process from DA numerical value to analog value is opposite to the conversion process from AD analog value to numerical value, which will not be described in detail here. The adjusted voltage value controls the brightness of the OLED display screen according to the time relationship to improve the problem of brightness jump of the OLED display screen.

[0109] In order to facilitate the understanding of the present invention, some preferred embodiments of the present invention are further described below.

[0110] In this embodiment, a control system for improving the brightness jump of an OLED display screen is proposed. The system is composed of the following key parts: a light intensity detection module, a state conversion module, a data processing module, a user preset terminal, and a central processing unit. These components work together to ensure accurate improvement of the brightness jump of the OLED display screen.

[0111] The working process is as follows:

[0112] Step 1: Users first input the target brightness value they want to achieve through the interactive interface. This target value is expressed in numerical form, usually an accurate brightness level, representing the change in light intensity that the OLED display should achieve in its final state. The user's input triggers a series of operations within the system and starts the brightness adjustment process;

[0113] Step 2: Once the user enters the target brightness value, the system will immediately start the OLED display and the light intensity detection module will start running. This module uses a sensor to monitor the light intensity emitted by the display in real time and records its changes over time. This process allows the system to obtain the actual brightness level of the current display for subsequent adjustment steps;

[0114] Step 3: In this step, the analog light intensity information from the light intensity detection module is input into the state conversion module. The core function of this module is to convert the analog signal into a digital signal (AD conversion) for more accurate numerical calculation and processing. Through this conversion process, the system obtains a numerical information that can reflect the actual brightness of the current OLED display.

[0115] Step 4: During the value conversion process, the system will adjust the accuracy according to the characteristics of the selected resistor module and AD converter. This means that the system does not simply convert the analog signal into a digital signal, but also takes into account the characteristics and limitations of the hardware device to ensure that the converted value has sufficient accuracy to meet the needs of display brightness adjustment;

[0116] Step 5: The system then compares the currently obtained brightness value with the target brightness value input by the user through the data processing module. Through this comparison, the system can calculate a difference value, which represents the deviation between the current brightness of the display and the expected brightness. The result of this step is to generate a real-time difference value for further adjustment;

[0117] Step 6: The calculated difference information is input into the LQR (Linear Quadratic Regulator) control model. The LQR model is an advanced control algorithm that can optimize the parameters of the control system through multiple iterations. By processing the difference information, the LQR model will continuously adjust and optimize the control parameters of the system until it finds the most suitable voltage output parameters to minimize the brightness deviation;

[0118] Step 7: After the LQR model optimization is completed, the system will output the adjusted voltage parameters, which will be converted into a voltage signal that can be used by the OLED display through the DA (digital-to-analog conversion) module. Finally, the brightness of the display will be adjusted according to this optimized voltage signal to achieve an effect that matches the user's preset brightness target.

[0119] Through the above steps and system design, the control system for improving the brightness jump of the OLED display screen of the present invention can achieve a highly automated and intelligent improvement in the brightness jump of the OLED display screen, improve the performance of the OLED display screen, realize the detection of the brightness of the OLED display screen, solve the problem of the brightness jump of the display screen, and improve the stability and reliability of the product.

[0120] In summary, the present invention provides a method, device and storage medium for improving the brightness jump of an OLED display screen. The method is executed by a controller, including obtaining the brightness change information of the OLED display screen detected by a photoresistor; converting the AD analog quantity to the numerical quantity according to the brightness change information to obtain the brightness numerical information; comparing the brightness numerical information with the preset standard numerical information to obtain the difference information between the brightness numerical information and the preset standard numerical information; inputting the difference information into a pre-configured LQR regulator control model, and outputting adjustment information to control the voltage value of the OLED display screen according to the adjustment information. The brightness change of the OLED display screen is detected in real time by a photoresistor, and the brightness change is analyzed. When the difference is large from the preset OLED screen brightness jump information, the voltage of each small unit of the screen OLED is adjusted. In this process, the photoresistor detects the change of the brightness of the OLED display screen in real time, and can determine whether the display screen has a brightness jump problem. The LQR regulator control model can achieve a smoother transition of the brightness of the OLED display screen. The whole process not only realizes the detection of the brightness of the OLED display screen, but also solves the problem of brightness jump of the display screen, thereby improving the stability and reliability of the product.

[0121] Reference Figure 4 The second embodiment of the present invention provides a device for improving brightness jump of an OLED display screen, comprising:

[0122] A data acquisition module is used to obtain the brightness change information of the OLED display screen detected by the photoresistor;

[0123] An information conversion module, used to convert the AD analog quantity into a numerical quantity according to the brightness change information, so as to obtain the brightness numerical information;

[0124] A numerical calculation module, used for comparing the brightness numerical information with preset standard numerical information to obtain difference information between the brightness numerical information and the preset standard numerical information;

[0125] The command control module is used to input the difference information into a pre-configured LQR regulator control model and output adjustment information to control the voltage value of the OLED display screen according to the adjustment information.

[0126] In one embodiment, the data acquisition module includes:

[0127] Light intensity detection module: used to convert the brightness value of the OLED display captured by the photoresistor into a voltage value;

[0128] Time information combination module: used to combine the brightness information of the OLED display with the time information, and convert the brightness change information into a function value related to time and light intensity.

[0129] In one embodiment, the data acquisition module is further used for:

[0130] The change in the resistance value inside the photoresistor is converted into voltage value information, and the voltage value information is marked as brightness change information.

[0131] In one implementation, the information conversion module is used to:

[0132] According to the brightness change information, AD analog quantity is converted into numerical quantity to obtain brightness numerical information, including: quantizing the brightness change information to obtain finite numerical set information; encoding the finite numerical set information to convert it into digital information, and marking the digital information as brightness numerical information.

[0133] Specifically: according to the brightness change information, the second brightness change information that changes continuously with time is obtained; according to the second brightness change information, rounding and truncation are performed to obtain the third brightness change information that changes discretely with time; according to the third brightness change information, normalization processing is performed to obtain finite value set information; finite value set information is a value that changes with time. Among them, the second brightness change information is the numerical information after considering the time parameter, and the third brightness change information is a discrete function that changes with time, and the discrete function only has a value at a specific time. In this embodiment, the third brightness change information is normalized to convert the numerical information into a value between 0-255. The quantized numerical information is encoded into a binary digital code. This process involves a specific number of bits, such as 8 bits, 16 bits or higher. The higher the number of bits, the wider the range of values ​​that can be represented and the higher the resolution. Finally, this binary digital code is used to represent the specific light intensity amplitude of the original illumination analog signal, thereby completing the conversion from analog to digital. In this embodiment, an 8-bit AD converter is selected for sampling. The converter uses a periodic sampling method with a period of 0.05s and a frequency of 20HZ. After sampling, quantization processing is performed. The finite value set information after processing is 0-255. Finally, the quantized value information is encoded and converted into binary data for storage and transmission.

[0134] In one implementation, the numerical calculation module is further used for:

[0135] According to the brightness numerical information and the preset standard numerical information, a difference is made between the brightness numerical information and the preset standard numerical information at the same time to obtain difference information between the brightness numerical information and the preset standard numerical information.

[0136] It should be noted that the preset standard numerical information is pre-set by the user, and may be a brightness change of 100 brightness numerical units per second, wherein the brightness numerical unit is the unit value of the brightness numerical information of the photoresistor, and the present invention does not make any specific limitation on this.

[0137] It should be further noted that the brightness numerical information is compared with the preset standard numerical information, specifically, the binary numerical information is subtracted from the binary preset standard numerical information to obtain the difference information. In this example, the binary value is 8 bits, and the 8-bit binary numbers are subtracted from each other and then stored as 8-bit binary numbers.

[0138] In one embodiment, the instruction control module is further used to:

[0139] An OLED screen brightness model is constructed based on the brightness change information and the voltages on multiple OLED units on the OLED screen; a low-pass filter transfer function is constructed based on the difference information; and the LQR regulator control model is determined based on the screen brightness model and the low-pass filter transfer function.

[0140] It should be noted that the LQR regulator control model inputs the screen brightness model and the low-pass filter transfer function as parameters, analyzes the two models, obtains the LQR cost function, minimizes the cost function through iterative calculation, and then outputs the calculation result as an adjustment value to adjust the voltage of the OLED display.

[0141] It should be further explained that the voltage value of the OLED display screen is changed according to the adjustment information by converting the digitized adjustment information into an analog value using a DA value to obtain an adjusted voltage value; and the voltage value of the OLED display screen is controlled according to the adjusted voltage value.

[0142] In summary, the present invention provides a method, device and storage medium for improving the brightness jump of an OLED display screen. The method is executed by a controller, including obtaining the brightness change information of the OLED display screen detected by a photoresistor; converting the AD analog quantity to the numerical quantity according to the brightness change information to obtain the brightness numerical information; comparing the brightness numerical information with the preset standard numerical information to obtain the difference information between the brightness numerical information and the preset standard numerical information; inputting the difference information into a pre-configured LQR regulator control model, and outputting adjustment information to control the voltage value of the OLED display screen according to the adjustment information. The brightness change of the OLED display screen is detected in real time by a photoresistor, and the brightness change is analyzed. When the difference is large from the preset OLED screen brightness jump information, the voltage of each small unit of the screen OLED is adjusted. In this process, the photoresistor detects the change of the brightness of the OLED display screen in real time, and can determine whether the display screen has a brightness jump problem. The LQR regulator control model can achieve a smoother transition of the brightness of the OLED display screen. The whole process not only realizes the detection of the brightness of the OLED display screen, but also solves the problem of brightness jump of the display screen, thereby improving the stability and reliability of the product.

[0143] It should be noted that a control system for improving brightness jumps of an OLED display provided in an embodiment of the present invention is used to execute all process steps of a method for improving brightness jumps of an OLED display in the above embodiment. The working principles and beneficial effects of the two correspond one to one, and thus will not be described in detail.

[0144] The embodiment of the present invention further provides an electronic device. The electronic device includes: a processor, a memory, and a computer program stored in the memory and executable on the processor, such as an LQR regulator control program. When the processor executes the computer program, the steps in the above-mentioned OLED display brightness control method embodiments are implemented, such as Figure 1 Alternatively, when the processor executes the computer program, the functions of the modules / units in the above-mentioned device embodiments are realized, such as the information conversion module.

[0145] Exemplarily, the computer program may be divided into one or more modules / units, which are stored in the memory and executed by the processor to implement the present invention. The one or more modules / units may be a series of computer program instruction segments capable of implementing specific functions, which are used to describe the execution process of the computer program in the electronic device.

[0146] The electronic device may be a computing device such as a desktop computer, a notebook, a PDA, and a smart tablet. The electronic device may include, but is not limited to, a processor and a memory. Those skilled in the art will appreciate that the above components are merely examples of electronic devices and do not constitute a limitation on the electronic device. The electronic device may include more or fewer components than the above components, or may combine certain components, or different components. For example, the electronic device may also include input and output devices, network access devices, buses, etc.

[0147] The processor may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc. The processor is the control center of the electronic device, and uses various interfaces and lines to connect various parts of the entire electronic device.

[0148] The memory can be used to store the computer program and / or module, and the processor realizes various functions of the electronic device by running or executing the computer program and / or module stored in the memory, and calling the data stored in the memory. The memory can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc.; the data storage area can store data created according to the use of the mobile phone (such as audio data, a phone book, etc.), etc. In addition, the memory can include a high-speed random access memory, and can also include a non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0149] Wherein, if the module / unit integrated in the electronic device is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the present invention implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. Wherein, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media do not include electric carrier signals and telecommunication signals.

[0150] It should be noted that the device embodiments described above are merely schematic, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. In addition, in the accompanying drawings of the device embodiments provided by the present invention, the connection relationship between the modules indicates that there is a communication connection between them, which may be specifically implemented as one or more communication buses or signal lines. A person of ordinary skill in the art may understand and implement it without paying any creative effort.

[0151] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. It is particularly pointed out that for those skilled in the art, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for improving brightness jump of an OLED display screen, characterized in that: Executed by a controller, the method includes: Get the brightness change information of the OLED display screen detected by the photoresistor; According to the brightness change information, convert the AD analog quantity into a numerical quantity to obtain the brightness numerical information; Comparing the brightness numerical information with preset standard numerical information to obtain difference information between the brightness numerical information and the preset standard numerical information; Inputting the difference information into a pre-configured LQR regulator control model, and outputting adjustment information to control the voltage value of the OLED display screen according to the adjustment information; The configuration process of the LQR regulator control model includes: Constructing an OLED screen brightness model according to the brightness change information and voltages on a plurality of OLED units on the OLED screen; Constructing a low-pass filter transfer function according to the difference information; Determining the LQR regulator control model according to the screen brightness model and the low-pass filter transfer function; Wherein, determining the LQR regulator control model according to the screen brightness model and the low-pass filter transfer function includes: Constructing a state function of an initial linear quadratic regulator of a nonlinear variable according to the screen brightness model and the low-pass filter transfer function; The brightness numerical information, the positions of the plurality of OLED units and the voltages on the plurality of OLED units are used as state parameters; Determining the LQR regulator control model according to the state function and the state parameter; Among them, the LQR regulator control model inputs the screen brightness model and the low-pass filter transfer function as parameters, analyzes the two models, obtains the LQR cost function, and minimizes the cost function through iterative calculation. The calculation result is then output as an adjustment value to adjust the voltage of the OLED display screen.

2. The method for improving brightness jump of OLED display screen according to claim 1, characterized in that: The step of obtaining the brightness change information of the OLED display screen detected by the photoresistor includes: The change in the resistance value inside the photoresistor is converted into voltage value information, and the voltage value information is marked as brightness change information.

3. The method for improving brightness jump of OLED display screen according to claim 1, characterized in that: The step of converting the AD analog quantity to a numerical quantity according to the brightness change information to obtain the brightness numerical information includes: Quantizing the brightness change information to obtain finite value set information; Encoding the finite value set information and converting it into digital information, and marking the digital information as brightness numerical information; Wherein, the digital information is represented in binary digital form.

4. The method for improving brightness jump of OLED display screen according to claim 3, characterized in that: The brightness change information is quantized to obtain finite value set information, including: According to the brightness change information, obtaining second brightness change information that changes continuously over time; According to the second brightness change information, rounding and truncation are performed to obtain third brightness change information that changes discretely over time; Performing normalization processing according to the third brightness change information to obtain finite value set information; The finite value set information is a value that changes over time.

5. The method for improving brightness jump of OLED display screen according to claim 1, characterized in that: Comparing the brightness numerical information with preset standard numerical information to obtain difference information between the brightness numerical information and the preset standard numerical information includes: According to the brightness numerical information and the preset standard numerical information, a difference is made between the brightness numerical information and the preset standard numerical information at the same time to obtain difference information between the brightness numerical information and the preset standard numerical information.

6. The method for improving brightness jump of OLED display screen according to claim 1, characterized in that: The step of controlling the voltage value of the OLED display screen according to the adjustment information includes: According to the adjustment information, convert the DA numerical value into an analog value to obtain an adjusted voltage value; According to the adjusted voltage value, the voltage value of the OLED display screen is controlled.

7. A device for improving brightness jump of OLED display screen, characterized in that: The method for improving brightness jump of an OLED display screen according to any one of claims 1 to 6 comprises: A data acquisition module is used to obtain the brightness change information of the OLED display screen detected by the photoresistor; An information conversion module, used to convert the AD analog quantity into a numerical quantity according to the brightness change information, so as to obtain the brightness numerical information; A numerical calculation module, used for comparing the brightness numerical information with preset standard numerical information to obtain difference information between the brightness numerical information and the preset standard numerical information; The command control module is used to input the difference information into a pre-configured LQR regulator control model and output adjustment information to control the voltage value of the OLED display screen according to the adjustment information.

8. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored computer program, wherein when the computer program is executed, the device where the computer-readable storage medium is located is controlled to execute the method for improving brightness jump of an OLED display screen as claimed in any one of claims 1 to 6.

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