Method, device and storage medium for calibrating an OLED display screen

Abstract

The present disclosure relates to a method, an apparatus, and a storage medium for calibrating an OLED display screen. The method for calibrating the OLED display screen includes: obtaining monochromatic brightness measurement data and chromaticity measurement data; converting the color gamut of vertex pixels to a target color gamut to obtain first pixels; obtaining second pixels including target brightness and target chromaticity at each other gray level except the maximum gray level according to the target brightness and target chromaticity of the sub-pixels included in the first pixels, and the monochromatic brightness measurement data and chromaticity measurement data; and calibrating the brightness and chromaticity of the display screen according to the target brightness and target chromaticity included in the first pixels and the target brightness and target chromaticity included in the second pixels. Through the present disclosure, when calibrating the brightness and chromaticity of the display screen, the calibration accuracy is high and it has universality.

Description

Technical Field

[0001] The present invention relates to the technical field of image display, and in particular, to a method, an apparatus, and a storage medium for calibrating an OLED display screen. Background Art

[0002] Organic Light Emitting Diode (OLED) display devices are widely used in intelligent terminals and other devices due to their advantages such as high color saturation, large viewing angle, low power consumption, high brightness, and simple device structure.

[0003] Currently, when calibrating the color of an OLED display device, it mainly relies on the gamma value of the display itself, that is, idealizing the display gamma to 2.2. However, due to the problems of uneven electrical performance of thin film transistors (TFTs) in the backplane of the OLED display device and the power voltage drop (IR Drop) generated during image driving, the actual gamma value of the display fluctuates greatly. Therefore, when the display Gamma value fluctuates greatly and the display screen is still calibrated according to the physical parameter gamma 2.2, it will cause a very large color difference in the display screen, seriously affecting the yield of the whole machine factory and reducing the color calibration production capacity of the OLED display device. Summary of the Invention

[0004] To overcome the problems existing in the related art, the present disclosure provides a method, an apparatus, and a storage medium for calibrating an OLED display screen.

[0005] According to a first aspect of an embodiment of the present disclosure, there is provided a method for calibrating an OLED display screen, including:

[0006] Obtaining luminance measurement data and chrominance measurement data of a single color, where the luminance measurement data and chrominance measurement data of the single color are measurement data of the single color at each gray level when the OLED display screen is at maximum luminance;

[0007] Converting the color gamut of the vertex pixel to a target color gamut to obtain a first pixel, where the vertex pixel is a pixel in which the single-color sub-pixel included in the display screen at maximum luminance has the highest color intensity at the maximum gray level;

[0008] According to the target luminance and target chrominance of the sub-pixels included in the first pixel, and the luminance measurement data and chrominance measurement data of the single color, obtaining a second pixel including the target luminance and target chrominance at each other gray level;

[0009] Calibrating the luminance and chrominance of the display screen according to the target luminance and target chrominance included in the first pixel and the target luminance and target chrominance included in the second pixel.

[0010] Optionally, obtaining a second pixel including a target brightness and a target chromaticity at each other gray level according to the target brightness and target chromaticity of the sub-pixels included in the first pixel, and the brightness measurement data and chromaticity measurement data of the single color includes:

[0011] According to the target brightness and target chromaticity of the sub-pixels included in the first pixel, obtaining an ideal brightness and an ideal chromaticity of the single color at each other gray level except the maximum gray level in the target color gamut;

[0012] According to the brightness measurement data and chromaticity measurement data of the single color, and the ideal brightness and ideal chromaticity of the single color at each other gray level, obtaining a second pixel including a target brightness and a target chromaticity at each other gray level.

[0013] Optionally, obtaining the ideal brightness and ideal chromaticity of the single color at each other gray level except the maximum gray level in the target color gamut includes:

[0014] Obtaining the target brightness of the sub-pixels included in the first pixel;

[0015] According to the target brightness of the sub-pixels included in the first pixel and the ideal gamma curve, determining the ideal brightness of the single color at each other gray level;

[0016] According to the ideal brightness of the single color at each other gray level, obtaining an ideal chromaticity corresponding to the ideal brightness of the single color.

[0017] Optionally, according to the brightness measurement data and chromaticity measurement data of the single color, and the ideal brightness and ideal chromaticity of the single color at each other gray level, determining a second pixel including a target brightness and a target chromaticity at each other gray level includes:

[0018] Taking each other gray level one by one as the target gray level, taking each single color one by one as the target color, and based on the dichotomy method, retrieving first brightness measurement data and first chromaticity measurement data that meet the ideal brightness and ideal chromaticity of the target color at the target gray level from the brightness measurement data and chromaticity measurement data of the single color;

[0019] According to the color difference standard, the first brightness measurement data and the first chromaticity measurement data, determining the target brightness and target chromaticity of the target color at the target gray level.

[0020] Optionally, according to the color difference standard, the first brightness measurement data and the first chromaticity measurement data, determining the target brightness and target chromaticity of the target color at the target gray level includes:

[0021] Determine integer luminance measurement data and integer chrominance measurement data that meet the color difference standard from the first luminance measurement data and the first chrominance measurement data;

[0022] Determine the minimum luminance data among the integer luminance measurement data and the minimum chrominance data among the integer chrominance measurement data as the target luminance and target chrominance of the target color at the target gray level.

[0023] According to a second aspect of the embodiments of the present disclosure, there is provided a device for calibrating an OLED display screen, including:

[0024] An acquisition module, configured to acquire luminance measurement data and chrominance measurement data of a single color, where the luminance measurement data and chrominance measurement data of the single color are measurement data of the single color at each gray level when the OLED display screen is at the maximum luminance;

[0025] A conversion module, configured to convert the color gamut of the vertex pixel to a target color gamut to obtain a first pixel, where the vertex pixel is a pixel in which the single-color sub-pixel included in the display screen has the highest color intensity at the maximum gray level when the display screen is at the maximum luminance;

[0026] A determination module, configured to obtain a second pixel including target luminance and target chrominance at each other gray level except the maximum gray level according to the target luminance and target chrominance of the sub-pixels included in the first pixel, and the luminance measurement data and chrominance measurement data of the single color;

[0027] A calibration module, configured to calibrate the luminance and chrominance of the display screen according to the target luminance and target chrominance included in the first pixel and the target luminance and target chrominance included in the second pixel.

[0028] Optionally, the determination module adopts the following method to obtain a second pixel including target luminance and target chrominance at each other gray level according to the target luminance and target chrominance of the sub-pixels included in the first pixel, and the luminance measurement data and chrominance measurement data of the single color:

[0029] Obtain the ideal luminance and ideal chrominance of the single color at each other gray level except the maximum gray level in the target color gamut according to the target luminance and target chrominance of the sub-pixels included in the first pixel;

[0030] Obtain a second pixel including target luminance and target chrominance at each other gray level according to the luminance measurement data and chrominance measurement data of the single color, and the ideal luminance and ideal chrominance of the single color at each other gray level.

[0031] Optionally, the determining module obtains the ideal luminance and ideal chromaticity of the single color at each other gray level except the maximum gray level under the target color gamut in the following manner:

[0032] Obtain the target luminance of the sub-pixels included in the first pixel;

[0033] Determine the ideal luminance of the single color at each other gray level according to the target luminance of the sub-pixels included in the first pixel and the ideal gamma curve;

[0034] Obtain the ideal chromaticity corresponding to the ideal luminance of the single color according to the ideal luminance of the single color at each other gray level.

[0035] Optionally, the determining module determines the second pixel including the target luminance and target chromaticity at each other gray level according to the luminance measurement data and chromaticity measurement data of the single color, and the ideal luminance and ideal chromaticity of the single color at each other gray level in the following manner:

[0036] Take each other gray level as the target gray level one by one, and take each single color as the target color one by one. Based on the ideal luminance and ideal chromaticity of the target color at the target gray level, retrieve the first luminance measurement data and the first chromaticity measurement data that meet the ideal luminance and ideal chromaticity of the target color at the target gray level from the luminance measurement data and chromaticity measurement data of the single color by means of the dichotomy method;

[0037] Determine the target luminance and target chromaticity of the target color at the target gray level according to the color difference standard, the first luminance measurement data, and the first chromaticity measurement data.

[0038] Optionally, the determining module determines the target luminance and target chromaticity of the target color at the target gray level according to the color difference standard, the first luminance measurement data, and the first chromaticity measurement data in the following manner:

[0039] Determine the integer luminance measurement data and integer chromaticity measurement data that meet the color difference standard from the first luminance measurement data and the first chromaticity measurement data;

[0040] Determine the minimum luminance data in the integer luminance measurement data and the minimum chromaticity data in the integer chromaticity measurement data as the target luminance and target chromaticity of the target color at the target gray level.

[0041] According to the third aspect of the embodiments of the present disclosure, there is provided a computer-readable storage medium, on which computer program instructions are stored, and when the program instructions are executed by a processor, the steps of the method for calibrating an OLED display screen provided in the first aspect of the present disclosure are implemented.

[0042] The technical solutions provided by the embodiments of the present disclosure may include the following beneficial effects: obtaining the luminance measurement data and chromaticity measurement data of a single color, where the luminance measurement data and chromaticity measurement data of the single color are the measurement data of the single color at each gray level when the OLED display screen is at the maximum luminance. Then, the color gamut of the vertex pixels of the display screen is converted to the target color gamut to obtain the first pixels. According to the target luminance and target chromaticity of the sub-pixels included in the first pixels, and the luminance measurement data and chromaticity measurement data of the single color, second pixels including the target luminance and target chromaticity at each other gray level except the maximum gray level are obtained. Based on the target luminance and target chromaticity included in the first pixels and the target luminance and target chromaticity included in the second pixels, the luminance and chromaticity of the display screen are calibrated, with high calibration accuracy and universality.

[0043] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. Brief Description of the Drawings

[0044] The drawings here are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with the present disclosure, and are used together with the specification to explain the principles of the present disclosure.

[0045] Figure 1 is a flowchart of a method for calibrating an OLED display screen shown according to an exemplary embodiment.

[0046] Figure 2 is a block diagram of a device for calibrating an OLED display screen shown according to an exemplary embodiment.

[0047] Figure 3 is a block diagram of a device for calibrating an OLED display screen shown according to an exemplary embodiment. Detailed Description of the Embodiments

[0048] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. On the contrary, they are only examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0049] Figure 1 is a flowchart of a method for calibrating an OLED display screen shown according to an exemplary embodiment, as Figure 1 shown, including the following steps.

[0050] In step S11, the luminance measurement data and chrominance measurement data of a single color are obtained. The luminance measurement data and chrominance measurement data of the single color are the measurement data of the single color at each gray level when the OLED display screen is at the maximum luminance.

[0051] In the present disclosure, the single color can be the three primary colors of red, green, and blue.

[0052] In step S12, the color gamut of the vertex pixel is converted to the target color gamut to obtain the first pixel. The pixel is a pixel in which the single-color sub-pixels included when the display screen is at the maximum luminance are at the highest color intensity at the maximum gray level.

[0053] Among them, the target color gamut can be the sRGB color gamut or the P3 color gamut, or other color gamuts. The vertex pixel can be such that the color intensities of the red sub-pixel, green sub-pixel, and blue sub-pixel are all 255.

[0054] In step S13, according to the target luminance and target chrominance of the sub-pixels included in the first pixel, and the luminance measurement data and chrominance measurement data of the single color, a second pixel including the target luminance and target chrominance at each other gray level except the maximum gray level is obtained.

[0055] In one implementation, the second pixel including the target luminance and target chrominance at each other gray level can be obtained in the following manner:

[0056] According to the target luminance and target chrominance of the sub-pixels included in the first pixel, the ideal luminance and ideal chrominance of the single color at each other gray level except the maximum gray level in the target color gamut are obtained.

[0057] According to the luminance measurement data and chrominance measurement data of the single color, and the ideal luminance and ideal chrominance of the single color at each other gray level, a second pixel including the target luminance and target chrominance at each other gray level is obtained.

[0058] Among them, each other gray level corresponds to different gray level numbers.

[0059] In one implementation, the ideal luminance of the single color at each other gray level except the maximum gray level in the target color gamut can be obtained in the following manner:

[0060] After the color gamut of the vertex pixel is converted to the target color gamut to obtain the first pixel, the luminance of the (red, green, and blue) sub-pixels included in the first pixel, that is, the target luminance, is obtained. According to the target luminance of the sub-pixels included in the first pixel and the ideal gamma curve, the ideal luminance of the single color at each other gray level is determined. Then, according to the ideal luminance of the single color at each other gray level, the ideal chrominance of the single color at the corresponding gray level can be obtained. Among them, the ideal gamma curve can be the luminance curve corresponding to the OLED display screen when the gamma is 2.2.

[0061] Among them, for example, the ideal brightness of a single color at other gray levels can be obtained based on the following formula:

[0062] (Gray / 255) gamma =lv / lv_ max

[0063] Among them, Gray represents the corresponding gray level, lv_ max represents the target brightness of a single color at the maximum gray level, and gamma is a constant 2.2.

[0064] For example, after obtaining the target brightness lv_ max of the first red sub-pixel, according to the ideal gamma curve, that is, when gamma is 2.2, the ideal brightness lv of red at other gray levels can be determined. Then, according to the ideal brightness of red at other gray levels, the ideal chromaticity of red at the corresponding gray level can be obtained.

[0065] After obtaining the ideal brightness and ideal chromaticity of a single color at each other gray level except the maximum gray level in the target color gamut according to the target brightness and target chromaticity of the sub-pixels included in the first pixel, the second pixel including the target brightness and target chromaticity at each other gray level can be determined according to the brightness measurement data and chromaticity measurement data of the single color, and the ideal brightness and ideal chromaticity of the single color at each other gray level.

[0066] In one implementation, for example, the second pixel including the target brightness and target chromaticity at each other gray level can be determined in the following way:

[0067] Taking each other gray level as the target gray level one by one, and taking each single color as the target color one by one. Based on the ideal brightness and ideal chromaticity of the target color at the target gray level, the brightness measurement range including the first brightness measurement data and the chromaticity measurement range including the first chromaticity measurement data that meet the ideal brightness and ideal chromaticity of the target color at the target gray level are retrieved from the brightness measurement data and chromaticity measurement data of the single color by the dichotomy method. Then, according to the color difference standard, the first brightness measurement data and the first chromaticity measurement data, the target brightness and target chromaticity of the target color at the target gray level are determined.

[0068] Among them, the color difference standard can be expressed as DE<1, indicating that when the distance between the data of the sample color and the standard data is less than 1, it means that the color difference data is within a reasonable range.

[0069] Thus, according to the color difference standard DE<1, the color difference equation between the first brightness measurement data and the first chromaticity measurement data can be determined, and the target brightness and target chromaticity of the target color at the target gray level can be obtained.

[0070] Specifically, the integer luminance measurement data and integer chrominance measurement data that meet the color difference standard can be determined from the first luminance measurement data and the first chrominance measurement data, and the minimum luminance data in the integer luminance measurement data and the minimum chrominance data in the integer chrominance measurement data are determined as the target luminance and the target chrominance.

[0071] For example: after converting the vertex pixel to the target color gamut, the first pixel is obtained. The target luminance data of R red, G green, and B blue corresponding to this first pixel are: Lv_R_255: 120.78619 nits, Lv_G_255: 354.52145 nits, Lv_B_255: 36.683205 nits. The ideal chromaticities of this first pixel are: R: (0.68, 0.32), G: (0.259, 0.71), and B: (0.15, 0.06).

[0072] Based on this, according to the formula Lv = Lv_max(gray / 255)^2.2, the luminance of the middle gray level can be obtained. For example, at the 16th gray level, its corresponding ideal luminance is:

[0073] Lv_R_16 = 120.78619*(16 / 255)^2.2 = 0.2733 nit,

[0074] Lv_G_16 = 354.52145*(16 / 255)^2.2 = 0.8023 nit

[0075] Lv_B_16 = 36.683205*(16 / 255)^2.2 = 0.0831 nit. The XYZ component values of the corresponding pixel (the second pixel) at the 16th gray level are:

[0076] X_R_16 = Lv_R_16*0.68 / 0.2 = 0.5808 nit;

[0077] Y_R_16 = Lv_R_16 = 0.2733 nit;

[0078] Z_R_16 = Lv_R_16*(1 - 0.64 - 0.33) / 0.33 = 0.

[0079] X_G_16 = Lv_R_16*0.259 / 0.71 = 0.2926 nit;

[0080] Y_G_16 = Lv_R_16 = 0.8023 nit;

[0081] Z_G_16 = Lv_R_16*(1 - 0.259 - 0.71) / 0.33 = 0.035 nit.

[0082] X_B_16 = Lv_R_16 * 0.15 / 0.06 = 0.2075 nit;

[0083] Y_B_16 = Lv_R_16 = 0.0831 nit;

[0084] Z_B_16 = Lv_R_16 * (1 - 0.15 - 0.06) / 0.06 = 1.093 nit.

[0085] Furthermore, according to the first pixel, a second pixel including a target brightness and a target chromaticity can be obtained for each other gray level.

[0086] In step S14, according to the target brightness and target chromaticity included in the first pixel and the target brightness and target chromaticity included in the second pixel, the brightness and chromaticity of the display screen are calibrated.

[0087] Thus, after obtaining the target brightness and target chromaticity included in the first pixel and the target brightness and target chromaticity included in the second pixel, that is, after obtaining the target brightness and target chromaticity of the pixel at each gray level, the brightness and chromaticity of each pixel point of the display screen can be calibrated according to the target brightness and target chromaticity of the pixel at each gray level. The calibration accuracy is high and has universality. At the same time, it also avoids the abnormal display situations such as uneven display, color deviation, and patches of the display screen caused by calibrating using the actual gamma value of the display screen when the actual gamma value of the display screen fluctuates non-standardly.

[0088] In an exemplary embodiment of the present disclosure, luminance measurement data and chromaticity measurement data of a single color are obtained. The luminance measurement data and chromaticity measurement data of the single color are the measurement data of the single color at each gray level when the OLED display screen is at the maximum luminance. Then, the color gamut of the vertex pixel of the display screen is converted to a target color gamut to obtain a first pixel. According to the target brightness and target chromaticity of the sub-pixels included in the first pixel, and the luminance measurement data and chromaticity measurement data of the single color, a second pixel including a target brightness and a target chromaticity is obtained for each other gray level except the maximum gray level. The brightness and chromaticity of the display screen are calibrated based on the target brightness and target chromaticity included in the first pixel and the target brightness and target chromaticity included in the second pixel, and the calibration accuracy is high and has universality.

[0089] Figure 2 It is a block diagram 200 of a device for calibrating an OLED display screen shown according to an exemplary embodiment. Refer to Figure 2 , including:

[0090] An acquisition module 201, configured to acquire luminance measurement data and chromaticity measurement data of a single color. The luminance measurement data and chromaticity measurement data of the single color are the measurement data of the single color at each gray level when the OLED display screen is at the maximum luminance;

[0091] A conversion module 202 is configured to convert the color gamut of the vertex pixels to a target color gamut to obtain first pixels, where the vertex pixels are pixels in which the monochromatic sub-pixels included when the display screen is at the maximum brightness have the highest color intensity at the maximum gray level.

[0092] A determination module 203 is configured to obtain second pixels including the target brightness and target chromaticity at each other gray level according to the target brightness and target chromaticity of the sub-pixels included in the first pixels, and the brightness measurement data and chromaticity measurement data of the monochromatic color.

[0093] A calibration module 204 is configured to calibrate the brightness and chromaticity of the display screen according to the target brightness and target chromaticity included in the first pixels and the target brightness and target chromaticity included in the second pixels.

[0094] Optionally, the determination module 203 obtains second pixels including the target brightness and target chromaticity at each other gray level according to the target brightness and target chromaticity of the sub-pixels included in the first pixels, and the brightness measurement data and chromaticity measurement data of the monochromatic color in the following manner:

[0095] According to the target brightness and target chromaticity of the sub-pixels included in the first pixels, obtain the ideal brightness and ideal chromaticity of the monochromatic color at each other gray level except the maximum gray level in the target color gamut.

[0096] According to the brightness measurement data and chromaticity measurement data of the monochromatic color, and the ideal brightness and ideal chromaticity of the monochromatic color at each other gray level, obtain second pixels including the target brightness and target chromaticity at each other gray level.

[0097] Optionally, the determination module 203 obtains the ideal brightness and ideal chromaticity of the monochromatic color at each other gray level except the maximum gray level in the target color gamut in the following manner:

[0098] Obtain the target brightness of the sub-pixels included in the first pixels.

[0099] According to the target brightness of the sub-pixels included in the first pixels and the ideal gamma curve, determine the ideal brightness of the monochromatic color at each other gray level.

[0100] According to the ideal brightness of the monochromatic color at each other gray level, obtain the ideal chromaticity corresponding to the ideal brightness of the monochromatic color.

[0101] Optionally, the determination module 203 determines second pixels including the target brightness and target chromaticity at each other gray level according to the brightness measurement data and chromaticity measurement data of the monochromatic color, and the ideal brightness and ideal chromaticity of the monochromatic color at each other gray level in the following manner:

[0102] Taking each of the other gray levels as the target gray level and each of the monochromatic colors as the target color, based on the ideal brightness and ideal chromaticity of the target color at the target gray level, retrieving, from the brightness measurement data and chromaticity measurement data of the monochromatic color, the first brightness measurement data and the first chromaticity measurement data that meet the ideal brightness and ideal chromaticity of the target color at the target gray level based on the dichotomy method;

[0103] Determining the target brightness and target chromaticity of the target color at the target gray level according to the color difference standard, the first brightness measurement data, and the first chromaticity measurement data.

[0104] Optionally, the determining module 203 determines the target brightness and target chromaticity of the target color at the target gray level according to the color difference standard, the first brightness measurement data, and the first chromaticity measurement data in the following manner:

[0105] Determining the integer brightness measurement data and integer chromaticity measurement data that meet the color difference standard from the first brightness measurement data and the first chromaticity measurement data;

[0106] Determining the minimum brightness data among the integer brightness measurement data and the minimum chromaticity data among the integer chromaticity measurement data as the target brightness and target chromaticity of the target color at the target gray level.

[0107] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment related to the method, and will not be elaborated here.

[0108] The present disclosure also provides a computer-readable storage medium, on which computer program instructions are stored, and when the program instructions are executed by a processor, the steps of the method for calibrating an OLED display screen provided by the present disclosure are implemented.

[0109] Figure 3 It is a block diagram of a device 800 for calibrating an OLED display screen shown according to an exemplary embodiment. For example, the device 800 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, etc.

[0110] Referring to Figure 3 , the device 800 may include one or more of the following components: a processing component 802, a memory 804, a power component 806, a multimedia component 808, an audio component 810, an input / output (I / O) interface 812, a sensor component 814, and a communication component 816.

[0111] The processing component 802 generally controls the overall operation of the device 800, such as operations associated with display, telephone calls, data communication, camera operations, and recording operations. The processing component 802 may include one or more processors 820 to execute instructions to complete all or part of the steps of the method for calibrating the OLED display screen described above. In addition, the processing component 802 may include one or more modules to facilitate the interaction between the processing component 802 and other components. For example, the processing component 802 may include a multimedia module to facilitate the interaction between the multimedia component 808 and the processing component 802.

[0112] The memory 804 is configured to store various types of data to support the operation of the device 800. Examples of such data include instructions for any application or method operating on the device 800, contact data, phone book data, messages, pictures, videos, and the like. The memory 804 may be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, a magnetic disk, or an optical disk.

[0113] The power component 806 provides power to various components of the device 800. The power component 806 may include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power for the device 800.

[0114] The multimedia component 808 includes a screen that provides an output interface between the device 800 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors may not only sense the boundaries of the touch or swipe actions but also detect the duration and pressure associated with the touch or swipe operation. In some embodiments, the multimedia component 808 includes a front camera and / or a rear camera. When the device 800 is in an operating mode, such as a shooting mode or a video mode, the front camera and / or the rear camera may receive external multimedia data. Each of the front camera and the rear camera may be a fixed optical lens system or have a focal length and optical zoom capabilities.

[0115] The audio component 810 is configured to output and / or input audio signals. For example, the audio component 810 includes a microphone (MIC) that is configured to receive external audio signals when the device 800 is in an operating mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals can be further stored in the memory 804 or transmitted via the communication component 816. In some embodiments, the audio component 810 further includes a speaker for outputting audio signals.

[0116] The I / O interface 812 provides an interface between the processing component 802 and peripheral interface modules, and the peripheral interface modules may be a keyboard, a click wheel, buttons, and the like. These buttons may include, but are not limited to: a home button, a volume button, a power button, and a lock button.

[0117] The sensor component 814 includes one or more sensors for providing status assessments of various aspects of the device 800. For example, the sensor component 814 can detect the on / off state of the device 800, the relative positioning of components, such as the display and keypad of the device 800. The sensor component 814 can also detect a change in the position of the device 800 or a component of the device 800, the presence or absence of user contact with the device 800, the orientation or acceleration / deceleration of the device 800, and the temperature change of the device 800. The sensor component 814 can include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor component 814 can also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor component 814 can further include an acceleration sensor, a gyro sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0118] The communication component 816 is configured to facilitate communication between the device 800 and other devices in a wired or wireless manner. The device 800 can access a wireless network based on communication standards, such as WiFi, 2G, or 3G, or a combination thereof. In an exemplary embodiment, the communication component 816 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 816 further includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0119] In an exemplary embodiment, the apparatus 800 may be implemented by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components for performing the method of calibrating the OLED display screen described above.

[0120] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 804 including instructions, and the above instructions can be executed by a processor 820 of the apparatus 800 to complete the method of calibrating the OLED display screen described above. For example, the non-transitory computer-readable storage medium may be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, and an optical data storage device, etc.

[0121] In another exemplary embodiment, a computer program product is also provided, and the computer program product includes a computer program capable of being executed by a programmable device, and the computer program has a code portion for performing the method of calibrating the OLED display screen described above when executed by the programmable device.

[0122] Those skilled in the art will readily conceive of other embodiments of the present disclosure after considering the specification and practicing the present disclosure. This application is intended to cover any variations, uses, or adaptations of the present disclosure, which follow the general principles of the present disclosure and include known common knowledge or conventional technical means in the technical field not disclosed in the present disclosure. The specification and the embodiments are only regarded as exemplary, and the true scope and spirit of the present disclosure are pointed out by the following claims.

[0123] It should be understood that the present disclosure is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is only limited by the appended claims.

Claims

1. A method for calibrating an OLED display screen, characterized in that, it includes: Obtaining luminance measurement data and chromaticity measurement data of a single color, where the luminance measurement data and chromaticity measurement data of the single color are the measurement data of the single color at each gray level when the OLED display screen is at maximum luminance; Converting the color gamut of the vertex pixel to the target color gamut to obtain a first pixel, where the vertex pixel is a pixel in which the single-color sub-pixel included in the display screen has the highest color intensity at the maximum gray level when the display screen is at maximum luminance; According to the target luminance and target chromaticity of the sub-pixels included in the first pixel, and the luminance measurement data and chromaticity measurement data of the single color, obtaining a second pixel including the target luminance and target chromaticity at each other gray level except the maximum gray level; Calibrating the luminance and chromaticity of the display screen according to the target luminance and target chromaticity included in the first pixel and the target luminance and target chromaticity included in the second pixel.

2. The method according to claim 1, characterized in that, The step of obtaining a second pixel including the target luminance and target chromaticity at each other gray level except the maximum gray level according to the target luminance and target chromaticity of the sub-pixels included in the first pixel, and the luminance measurement data and chromaticity measurement data of the single color includes: According to the target luminance and target chromaticity of the sub-pixels included in the first pixel, obtaining the ideal luminance and ideal chromaticity of the single color at each other gray level except the maximum gray level in the target color gamut; According to the luminance measurement data and chromaticity measurement data of the single color, and the ideal luminance and ideal chromaticity of the single color at each other gray level, obtaining a second pixel including the target luminance and target chromaticity at each other gray level.

3. The method according to claim 2, characterized in that, The step of obtaining the ideal luminance and ideal chromaticity of the single color at each other gray level except the maximum gray level in the target color gamut includes: Obtaining the target luminance of the sub-pixels included in the first pixel; According to the target luminance of the sub-pixels included in the first pixel and the ideal gamma curve, determining the ideal luminance of the single color at each other gray level; According to the ideal luminance of the single color at each other gray level, obtaining the ideal chromaticity corresponding to the ideal luminance of the single color.

4. The method according to claim 2, characterized in that, The step of determining a second pixel including the target luminance and target chromaticity at each other gray level according to the luminance measurement data and chromaticity measurement data of the single color, and the ideal luminance and ideal chromaticity of the single color at each other gray level includes: Taking each other gray level one by one as the target gray level, taking each single color one by one as the target color, and based on the ideal luminance and ideal chromaticity of the target color at the target gray level, retrieving the first luminance measurement data and the first chromaticity measurement data that meet the ideal luminance and ideal chromaticity of the target color at the target gray level from the luminance measurement data and chromaticity measurement data of the single color; Based on the color difference standard, the first luminance measurement data, and the first chromaticity measurement data, the target luminance and target chromaticity of the target color at the target gray level are determined.

5. The method according to claim 4, wherein, the determining the target luminance and target chromaticity of the target color at the target gray level based on the color difference standard, the first luminance measurement data, and the first chromaticity measurement data includes: determining integer luminance measurement data and integer chromaticity measurement data that meet the color difference standard from the first luminance measurement data and the first chromaticity measurement data; determining the minimum luminance data among the integer luminance measurement data and the minimum chromaticity data among the integer chromaticity measurement data as the target luminance and target chromaticity of the target color at the target gray level.

6. An apparatus for calibrating an OLED display screen, wherein, it includes: an acquisition module for acquiring luminance measurement data and chromaticity measurement data of a single color, where the luminance measurement data and chromaticity measurement data of the single color are measurement data of the single color at each gray level when the OLED display screen is at maximum luminance; a conversion module for converting the color gamut of the vertex pixel to the target color gamut to obtain a first pixel, where the vertex pixel is a pixel in which the single-color sub-pixel included in the display screen has the highest color intensity at the maximum gray level when the display screen is at maximum luminance; a determination module for obtaining a second pixel including target luminance and target chromaticity at each other gray level except the maximum gray level based on the target luminance and target chromaticity of the sub-pixels included in the first pixel, and the luminance measurement data and chromaticity measurement data of the single color; a calibration module for calibrating the luminance and chromaticity of the display screen based on the target luminance and target chromaticity included in the first pixel and the target luminance and target chromaticity included in the second pixel.

7. The apparatus according to claim 6, wherein, the determination module obtains a second pixel including target luminance and target chromaticity at each other gray level except the maximum gray level based on the target luminance and target chromaticity of the sub-pixels included in the first pixel, and the luminance measurement data and chromaticity measurement data of the single color in the following manner: obtaining the ideal luminance and ideal chromaticity of the single color at each other gray level except the maximum gray level in the target color gamut based on the target luminance and target chromaticity of the sub-pixels included in the first pixel; obtaining a second pixel including target luminance and target chromaticity at each other gray level based on the luminance measurement data and chromaticity measurement data of the single color, and the ideal luminance and ideal chromaticity of the single color at each other gray level.

8. The apparatus according to claim 7, wherein, the determination module obtains the ideal luminance and ideal chromaticity of the single color at each other gray level except the maximum gray level in the target color gamut in the following manner: acquiring the target luminance of the sub-pixels included in the first pixel; determining the ideal luminance of the single color at each other gray level based on the target luminance of the sub-pixels included in the first pixel and the ideal gamma curve; According to the ideal luminance of the monochromatic color at each other gray level, an ideal chromaticity corresponding to the ideal luminance of the monochromatic color is obtained.

9. An apparatus for calibrating an OLED display screen, characterized in that it includes: a processor; a memory for storing processor-executable instructions; wherein, the processor is configured to: implement the steps of the method according to any one of claims 1 to 5.

10. A computer-readable storage medium, on which computer program instructions are stored, characterized in that when the program instructions are executed by a processor, the steps of the method according to any one of claims 1 to 5 are implemented.

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