CN109308861B - Color calibration method, device, equipment and storage medium - Google Patents
Color calibration method, device, equipment and storage medium Download PDFInfo
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- CN109308861B CN109308861B CN201710619739.4A CN201710619739A CN109308861B CN 109308861 B CN109308861 B CN 109308861B CN 201710619739 A CN201710619739 A CN 201710619739A CN 109308861 B CN109308861 B CN 109308861B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve
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Abstract
The present disclosure provides a color calibration method, apparatus, device and storage medium, the method comprising: when a preset color calibration condition is met, acquiring the color coordinate of the current white point of the screen; comparing the current white point color coordinate with a prestored target white point color coordinate, and determining a register parameter group corresponding to a Gamma curve which enables a screen to reach the target white point color coordinate according to a comparison result; when the screen is lighted, the determined register parameter group is downloaded to the driving IC, and the screen is lighted by using the determined register parameter group. By applying the embodiment of the disclosure, the display effect can be improved, and the display precision can be improved.
Description
Technical Field
The present application relates to the field of display technologies, and in particular, to a color calibration method, apparatus, device, and storage medium.
Background
With the development of science and technology, electronic devices with display screens are more and more favored by users, and meanwhile, the requirements of the users on the display effects of the display screens are higher and higher. Due to the white display effect, the accuracy of the color is usually greatly affected, and therefore, the color calibration can be realized by adjusting the color coordinates of the white point in the color gamut space.
The Gamma curve (Gamma) represents the nonlinear relation between the brightness and the input voltage, the standard Gamma curve has a corresponding relation with the target white point, and when the nonlinear relation between the brightness and the input voltage meets the standard Gamma curve, the screen can reach the target white point. The target white point is a white point whose color coordinates are desired color coordinates. The brightness can be controlled by the voltage so that the screen white point is close to the target white point. Currently, the register parameter set required to reach the standard Gamma curve, which can make the screen reach the target white point, can be programmed into the screen driver IC. The electronic device calls the set of register parameters, so that the white point of the color gamut space of the screen is adjusted to be the target white point, and further, the color adjustment of the screen is realized.
However, after the register parameters corresponding to the standard Gamma curve are burned into the screen driving IC, the set of register parameters is determined, and due to errors between the LED and the color film, the actual white point color coordinates are inconsistent with the expected white point color coordinates, and distortion occurs when a picture is displayed.
Disclosure of Invention
To overcome the problems in the related art, the present disclosure provides a color calibration method, apparatus, device, and storage medium.
According to a first aspect of embodiments of the present disclosure, there is provided a color calibration method, the method comprising:
when a preset color calibration condition is met, acquiring the color coordinate of the current white point of the screen;
comparing the current white point color coordinate with a prestored target white point color coordinate, and determining a register parameter group corresponding to a Gamma curve which enables a screen to reach the target white point color coordinate according to a comparison result;
when the screen is lighted, the determined register parameter group is downloaded to the driving IC, and the screen is lighted by using the determined register parameter group.
Optionally, the color calibration condition includes at least one of the following conditions:
the electronic equipment executing the color calibration method is started for the first time;
a color calibration instruction is received.
Optionally, the comparing the current white point color coordinate with a pre-stored target white point color coordinate, and determining, according to a comparison result, a register parameter set corresponding to a Gamma curve for enabling a screen to reach the target white point color coordinate includes:
determining the variation of the current white point color coordinate and a prestored target white point color coordinate;
and processing the recorded register parameter group in the drive IC based on the determined variation and a preset algorithm to obtain the register parameter group corresponding to the Gamma curve which enables the screen to reach the target white point color coordinate, wherein the preset algorithm is an algorithm for determining the relation between the white point color coordinate and the register parameter group.
Optionally, the pre-burning of the white, red, green, and blue color coordinates and brightness of the screen in the driver IC, and the determining of the register parameter set corresponding to the Gamma curve that makes the screen reach the target white point color coordinate based on the determined variation and the preset algorithm include:
and determining a register parameter group corresponding to a Gamma curve which enables the screen to reach the target white point color coordinate based on the burnt color coordinate and brightness, the determined variation and a preset algorithm.
Optionally, the screen is divided into a designated number of sub-areas in advance, and each area is correspondingly provided with a register parameter set corresponding to a Gamma curve for enabling the screen to reach the target white point color coordinate;
the step of comparing the current white point color coordinate with a prestored target white point color coordinate and determining a register parameter group corresponding to a Gamma curve which enables a screen to reach the target white point color coordinate according to a comparison result comprises the following steps:
comparing the current white point color coordinate with a prestored target white point color coordinate;
and if the current white point color coordinate and the prestored target white point color coordinate are not in the same sub-area, acquiring a register parameter group corresponding to the sub-area where the current white point color coordinate is located.
According to a second aspect of embodiments of the present disclosure, there is provided a color calibration apparatus, the apparatus comprising:
the information acquisition module is configured to acquire the color coordinates of the current white point of the screen when a preset color calibration condition is met;
the parameter determination module is configured to compare the current white point color coordinate with a prestored target white point color coordinate and determine a register parameter group corresponding to a Gamma curve which enables the screen to reach the target white point color coordinate according to a comparison result;
and a color calibration template configured to download the determined register parameter group to the driving IC and perform screen lighting using the determined register parameter group when the screen is lit.
Optionally, the color calibration condition includes at least one of the following conditions:
the electronic equipment executing the color calibration device is started for the first time;
a color calibration instruction is received.
Optionally, the parameter determining module includes:
a variation determining submodule configured to determine a variation of the current white point color coordinate and a prestored target white point color coordinate;
and the parameter determining submodule is configured to process the recorded register parameter set in the drive IC based on the determined variation and a preset algorithm to obtain the register parameter set corresponding to the Gamma curve which enables the screen to reach the target white point color coordinate, and the preset algorithm is an algorithm for determining the relation between the white point color coordinate and the register parameter set.
Optionally, the color coordinates and brightness of white, red, green, and blue of the screen are pre-programmed in the driver IC, and the parameter determination sub-module is specifically configured to:
and determining a register parameter group corresponding to a Gamma curve which enables the screen to reach the target white point color coordinate based on the burnt color coordinate and brightness, the determined variation and a preset algorithm.
Optionally, the screen is divided into a designated number of sub-areas in advance, and each area is correspondingly provided with a register parameter set corresponding to a Gamma curve for enabling the screen to reach the target white point color coordinate;
the parameter determination module is specifically configured to:
comparing the current white point color coordinate with a prestored target white point color coordinate;
and if the current white point color coordinate and the prestored target white point color coordinate are not in the same sub-area, acquiring a register parameter group corresponding to the sub-area where the current white point color coordinate is located.
According to a third aspect of the embodiments of the present disclosure, there is provided an electronic apparatus including:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to:
when a preset color calibration condition is met, acquiring the color coordinate of the current white point of the screen;
comparing the current white point color coordinate with a prestored target white point color coordinate, and determining a register parameter group corresponding to a Gamma curve which enables a screen to reach the target white point color coordinate according to a comparison result;
when the screen is lighted, the determined register parameter group is downloaded to the driving IC, and the screen is lighted by using the determined register parameter group.
According to a fourth aspect of embodiments of the present disclosure, there is provided a computer-readable storage medium, on which a computer program is stored, which when executed by a processor, implements the steps of any of the methods described above.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:
according to the embodiment of the disclosure, the current white point color coordinate is compared with the pre-stored target white point color coordinate, and the register parameter set burnt by the driving IC is converted into the register parameter set capable of displaying the target white point color coordinate, so that the display difference caused by the difference between screens can be solved, the display effect is improved, and the image distortion is avoided.
The color calibration method and the electronic device can start color calibration when the electronic device is started for the first time, and can also start color calibration when a color calibration instruction is received, so that flexible configuration of starting conditions is realized.
The embodiment of the disclosure determines the variation of the current white point color coordinate and the prestored target white point color coordinate, processes the burnt register parameter set in the drive IC based on the determined variation and the preset algorithm, obtains the register parameter set corresponding to the Gamma curve which enables the screen to reach the target white point color coordinate, can improve the accuracy of the obtained register parameter set, and further improves the color calibration accuracy.
The embodiment of the disclosure compares the current white point color coordinate with the prestored target white point color coordinate; if the current white point color coordinate and the pre-stored target white point color coordinate are not in the same sub-region, the register parameter group corresponding to the sub-region where the current white point color coordinate is located is obtained, the calculated register parameter group is stored in a storage region, the register parameter group is directly called when needed, and the register parameter group conversion speed can be improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
FIG. 1A is a flow chart illustrating a method of color calibration according to an exemplary embodiment of the present disclosure.
FIG. 1B is a flow chart illustrating another color calibration method according to an exemplary embodiment of the present disclosure.
FIG. 1C is a flow chart illustrating another color calibration method according to an exemplary embodiment of the present disclosure.
FIG. 2 is a block diagram of a color calibration apparatus shown in accordance with an exemplary embodiment of the present disclosure.
FIG. 3 is a block diagram of another color calibration apparatus shown in accordance with an exemplary embodiment of the present disclosure.
FIG. 4 is a block diagram illustrating an apparatus for color calibration according to an exemplary embodiment of the present disclosure.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present disclosure. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.
More and more electronic devices are now provided with display screens. The electronic device may be a device having a display screen, such as a smart phone, a tablet computer, a PDA (Personal Digital Assistant), an e-book reader, and a multimedia player. In order to improve the accuracy of screen display colors, the screen of the electronic device is color calibrated.
In the related art, the target white point is a white point that the tester desires the screen to reach, and the screen can be brought to the target white point by adjusting the color coordinates of white in the color gamut space of the screen. When the screen reaches the target white point, the accuracy of the screen display color is high. Therefore, the register parameter set corresponding to the Gamma curve when the screen reaches the target white point can be burned into a screen driving chip (Driver IC), the register parameter set can include a voltage parameter, and the electronic device calls the voltage parameter and adjusts the voltage according to the voltage parameter, so that the white point of the color gamut space of the screen is adjusted to the target white point, and further, the color of the screen is adjusted.
However, after the register parameters corresponding to the standard Gamma curve are burned into the screen driving IC, the set of register parameters is fixed, and due to the error between the LED and the color film, the actual white point color coordinate is inconsistent with the expected white point color coordinate, and the display color is inaccurate.
Based on this, the embodiments of the present disclosure provide a color calibration method to solve the defect that the display color is inaccurate due to the inconsistency between the actual white point color coordinates and the target white point color coordinates. According to the embodiment of the disclosure, the current white point color coordinate is compared with the pre-stored target white point color coordinate, and the register parameter group burnt by the driving IC is converted into the register parameter group capable of displaying the target white point color coordinate, so that the display difference caused by the difference between screens can be solved, and the display effect is improved.
The scheme provided by the present disclosure is explained in detail below.
As shown in fig. 1A, fig. 1A is a flow chart illustrating a color calibration method according to an exemplary embodiment of the present disclosure, which may be used in an electronic device, including the steps of:
in step 101, when a preset color calibration condition is satisfied, acquiring the color coordinates of the current white point of the screen.
In step 102, the current white point color coordinates are compared with pre-stored target white point color coordinates, and a register parameter group corresponding to a Gamma curve for making the screen reach the target white point color coordinates is determined according to the comparison result.
In step 103, upon lighting up the screen, the determined register parameter group is downloaded to the driver IC, and the screen lighting up is performed using the determined register parameter group.
In the embodiment of the present disclosure, the electronic device may be a device having a screen, such as a smart phone, a tablet computer, a PDA (Personal Digital Assistant), an e-book reader, and a multimedia player.
In this embodiment, the Gamma curve is adjusted to make the screen white point reach the target white point color coordinate, but since the Gamma curve cannot be adjusted directly, the Gamma curve can be adjusted through the IC register. A set of register parameter sets corresponding to a standard Gamma curve is usually programmed in a driver IC, and the set of register parameter sets can be obtained by testing and debugging a plurality of uniformly distributed panels. For example, the set of register parameter sets may be the center values of the gamma2.2 curves for all screens. Ideally, the screen white point is the standard design white point (target white point), e.g., (0.30,0.315), by performing the color calibration using the register parameter set points corresponding to the standard Gamma curve.
However, the white point coordinates of each screen may deviate due to errors in the LEDs and the color filter, and problems such as distortion may occur when a picture is displayed, and therefore, correction to a standard design value (target white point) is required.
The color calibration method of the embodiment of the disclosure can be executed when the preset color calibration condition is met.
Wherein the color calibration condition is a preset condition for triggering execution of color calibration. In one example, the color calibration condition may be that the electronic device performing the color calibration method is first powered on. When the electronic equipment is started for the first time, the color calibration can be carried out by using the embodiment of the disclosure, so that poor display caused by the difference between screens is avoided, and the display effect of the picture is improved. Correspondingly, the triggering condition of the color calibration may also be that the electronic device is started each time, so that the color calibration is triggered to be executed each time the electronic device is started.
In another example, to achieve controllability of color calibration, the color calibration condition may also be that a color calibration instruction is received. The generation of the color calibration instructions may be triggered upon the generation of a specified color calibration event. For example, detecting that a preset color calibration control is triggered, a specified color calibration event is generated, which may trigger generation of a color calibration instruction.
Therefore, the controllability of color calibration can be improved by triggering the execution of the color calibration through the color calibration instruction.
It should be understood that the color calibration condition may also be other conditions for starting color calibration, which are not listed here.
When the color calibration condition is met, the current white point color coordinate of the screen can be obtained, the current white point color coordinate is compared with the prestored target white point color coordinate, and the register parameter group corresponding to the Gamma curve which enables the screen to reach the target white point color coordinate is determined according to the comparison result.
The color coordinates of the screen white point and the target white point can be the same or similar by adjusting the Gamma curve, and the Gamma curve can be adjusted by adjusting the register parameters because the Gamma curve cannot be directly adjusted. In view of this, the register parameter group includes register parameters for making the nonlinear relationship between the luminance and the input voltage satisfy the Gamma curve, and the adjustment of the Gamma value is realized by the IC register, for example, the register parameter group may include parameters such as a voltage value. The Gamma curve makes the screen reach the target white point color coordinate, and the Gamma curve corresponds to the register parameter group.
The current white point color coordinates are compared with pre-stored target white point color coordinates, and a register parameter set corresponding to a Gamma curve for enabling the screen to reach the target white point color coordinates can be determined based on the difference between the current white point color coordinates and the target white point color coordinates. As a conversion process of the register parameter, the obtained register parameter group may be stored in a storage area of the processor. Wherein the register parameter set may be stored in the memory area in the form of a code. For example, in a Random Access Memory (RAM) of the AP (processor). Each time the screen needs to be lit, the register parameter set is read from the storage area and downloaded to the driver IC, and the screen lighting is performed using the read register parameter set.
The following is an example of two ways of determining the register parameter set.
The first mode is as follows: the comparing the current white point color coordinate with a pre-stored target white point color coordinate, and determining a register parameter set corresponding to a Gamma curve for making the screen reach the target white point color coordinate according to the comparison result may include:
determining the variation of the current white point color coordinate and a prestored target white point color coordinate;
and processing the recorded register parameter set in the drive IC based on the determined variation and a preset algorithm to obtain the register parameter set corresponding to the Gamma curve which enables the screen to reach the target white point color coordinate.
The preset algorithm is a preset algorithm for determining the relationship between the white point color coordinate and the register parameter group, and a large amount of sample data (the sample data comprises the register parameter group and the white point color coordinate when the white picture is included) is obtained by detecting and collecting the same batch of screens, so that the relationship between the color coordinate of the white picture and the RGB three-color register parameters can be obtained according to the sample data. Therefore, the register parameter set burnt in the driving IC can be processed based on the determined variation and the preset algorithm, and the register parameter set enabling the screen to reach the target white point color coordinate is obtained. In a batch of screens, based on the characteristics of the batch of screens, the corresponding brightness under different register parameter sets can be determined, and the relationship between the register parameter sets and the brightness can be obtained. Different register parameter sets of the same screen batch output different voltages, and the relation between the register parameter sets and the voltages can be obtained.
For example, data sampling may be performed in advance, and corresponding voltages and luminances may be acquired by debugging different register parameter sets, so that a relationship between the register parameter set and the luminances, a relationship between the register parameter set and the voltages, and a relationship between the luminances and the voltages may be obtained according to the sampling data, and further, a relationship between the white point color coordinate variation and the register parameter set may be obtained. And because the difference between the current white point color coordinate and the target white point color coordinate is known, an adjustment value for adjusting the recorded register parameter set in the drive IC can be determined according to the difference between the current white point color coordinate and the target white point color coordinate, and the recorded register parameter set in the drive IC is processed by utilizing the adjustment value to obtain the register parameter set corresponding to the Gamma curve which enables the screen to reach the target white point color coordinate.
The color coordinate of the white picture has a direct relation with RGB three-color Gamma. For example, assume a burned register parameter set: r255: g255: the target white point color coordinates are (0.305,0.32) for the B255 register values R1: G1: B1 (e.g., 1:1:1), but if the current white point color coordinates are (0.305, 0.34). Based on the results of the large data collection for this batch of screens, the current R255: g255: the B255 register has R1: G2: B1 (e.g., 1:1.2:1) (for example only, data may vary from product to product). At this time, the current Gamma register value of G may be entirely divided by AP
(e.g., 1.2), i.e., the white point color coordinates of the screen when the improved register parameter set is usedLabeled as (0.30,0.32) neighborhood.
In this embodiment, each screen calculates the register parameter corresponding to the optimal Gamma according to the difference between the current white point and the target white point.
The IC uses its Gamma framework and preset algorithm, according to the burned register parameter set in the driver IC and the current white color coordinate of each screen, it can iteratively obtain a set of optimized register parameter set, when the IC runs the set of register parameter set, the white point color coordinate of the screen can be calibrated to the desired target white point color coordinate, for example, to (0.30, 0.32).
In addition, in order to improve the accuracy of the register parameter set, the color coordinates and brightness of white, red, green, and blue may be used as the influencing factors. In view of this, when the parameters are burned, the color coordinates and brightness of white, red, green, and blue of the screen may be burned in the driver IC in advance, and when the register parameter group is determined, the register parameter group corresponding to the Gamma curve that makes the screen reach the target white point color coordinate may be determined based on the burned color coordinates and brightness, the determined variation, and the preset algorithm.
It can be seen that the register parameter set required when the target white point coordinate is reached can be obtained based on R, G, B, W color coordinates and luminance-voltage correspondence, and the variation of the current white point color coordinate and the target white point color coordinate, thereby improving the accuracy of the register parameter set.
Further, corresponding register parameter sets can be correspondingly calculated for different display modes. And processing the recorded register parameter set in the drive IC by using the preset algorithm based on different display modes and the determined variation to obtain the register parameter set corresponding to the Gamma curve which enables the screen to reach the target white point color coordinate, wherein the different display modes correspond to different register parameter sets.
The display mode may be a cold light mode, a warm light mode, or the like. The present embodiment provides different register parameter sets for different display modes, thereby improving the display effect.
As for lighting the screen, it may be a process in which the screen enters a bright screen state from a breath screen state. For example, the user may light up the screen by pressing the home key. When the screen is lit, the determined register parameter set may be downloaded to the driver IC, and the screen may be lit using the determined register parameter set.
For example, when the module performs programming of the register parameter set corresponding to the conventional Gamma, the current white point and RGB color coordinates of each screen are programmed into the Driver IC of the screen. And the IC calculates and obtains the register parameter group suitable for the screen according to the white point color coordinate and the burnt register parameter group according to a set algorithm, and a specific algorithm can be formulated by an IC factory according to the IC condition. When the electronic device is first powered on or needs to perform color calibration again after a period of use, the calibration file may be run, and at this time, the processor of the electronic device may write the calculated register parameter set to a memory (e.g., a RAM). And downloading the register parameter set corresponding to the display mode from the memory to the driver IC for screen lighting according to different display modes each time the screen is lighted, thereby realizing the single-screen calibration of the white point.
As shown in fig. 1B, fig. 1B is a flow chart illustrating another color calibration method according to an exemplary embodiment of the present disclosure. In the schematic diagram, a set of register parameter sets corresponding to a standard Gamma curve may be burned in the driver IC, and the set of register parameter sets may be obtained by testing and debugging from a plurality of uniformly distributed panels. Furthermore, the current white point, red, green and blue color coordinates and brightness of the burning module are increased, and burning values of different screens are different. When the electronic equipment is started for the first time or needs to perform white point calibration again in use, a register parameter group which can be converted into a target white point by the screen is calculated by using a preset algorithm, and the register parameter group in different display modes is different. The processor can store the register parameter group in the RAM of the processor, read the register parameter group from the RAM according to the display mode when the screen is lightened each time, download the register parameter group to the drive IC, and utilize the register parameter group to lighten the screen, thereby realizing the calibration of the white point and improving the image quality.
The second mode is as follows: to increase speed, multiple sets of already calculated register parameters may be stored into the AP by partitioning. The AP can directly call the relevant codes to the drive IC according to the white point information, and the speed is higher. In view of this, the screen is divided into a specified number of sub-areas in advance, and each area is correspondingly provided with a register parameter group corresponding to the Gamma curve which enables the screen to reach the target white point color coordinate. Further, the sub-regions may be obtained by performing region division according to the distribution of white point color coordinates allowed within the required range. The register parameter set corresponding to each sub-region may be obtained by pre-calculation using a preset algorithm in the first manner, which is not described herein again. The pre-performed operation may be performed before shipment.
The step of comparing the current white point color coordinate with a prestored target white point color coordinate and determining a register parameter group corresponding to a Gamma curve which enables a screen to reach the target white point color coordinate according to a comparison result comprises the following steps:
comparing the current white point color coordinate with a prestored target white point color coordinate;
and if the current white point color coordinate and the prestored target white point color coordinate are not in the same sub-area, acquiring a register parameter group corresponding to the sub-area where the current white point color coordinate is located.
Because corresponding register parameter sets are respectively arranged for different sub-areas, the color can be calibrated based on the register parameter set corresponding to the sub-area where the current white point color coordinate is located. The method can reduce the processing load of an electronic device processor (AP) and improve the conversion speed.
For example, it can be divided into 9 sub-regions as follows:
when the electronic equipment judges that the burnt white point is in the central value white point coordinate range, the register parameter set burnt in the IC is directly operated, when the electronic equipment judges that the burnt white point is in the area 1, the converted register parameter set corresponding to the central value of the color coordinate in the area 1 is directly downloaded to the driver IC, and at the moment, the color coordinate in the area 1 is transferred to the central value white point coordinate area. Compared with the first mode, the response time can be reduced, and the time from screen-off to screen-on of the screen is reduced.
In this embodiment, for a product with a central value in a plurality of partitions, the register parameter of Gamma that can adjust the current white point to the target white point is actually measured, and then the parameter is written into the AP, and when the white point is calibrated, the register parameter corresponding to Gamma is directly called according to the partition.
As shown in fig. 1C, fig. 1C is a flow chart illustrating another color calibration method according to an exemplary embodiment of the present disclosure. In the schematic diagram, a set of register parameter sets corresponding to a standard Gamma curve may be burned in the driver IC, and the set of register parameter sets may be obtained by testing and debugging from a plurality of uniformly distributed panels. Furthermore, the current white point, red, green and blue color coordinates and brightness of the burning module are increased, and burning values of different screens are different. When the electronic equipment is started for the first time or needs white point calibration again in use, the register parameter group corresponding to the sub-area where the current white point color coordinate is located is determined, and the register parameter groups in different display modes are different. The sub-regions may be obtained by dividing the screen in advance, and each region is correspondingly provided with a register parameter group corresponding to a Gamma curve for enabling the screen to reach the target white point color coordinate. The processor may store the determined set of register parameters in a RAM of the processor. And reading the register parameter group from the RAM according to the display mode each time the screen is lightened, downloading the register parameter group to the drive IC, and lightening the screen by using the register parameter group, thereby realizing the calibration of a white point and improving the image quality.
The various technical features in the above embodiments can be arbitrarily combined, so long as there is no conflict or contradiction between the combinations of the features, but the combination is limited by the space and is not described one by one, and therefore, any combination of the various technical features in the above embodiments also belongs to the scope disclosed in the present specification.
Corresponding to the embodiment of the color calibration method, the disclosure also provides embodiments of a color calibration device, a device applied by the device and a storage medium.
As shown in fig. 2, fig. 2 is a block diagram of a color calibration apparatus shown in the present disclosure according to an exemplary embodiment, the apparatus including:
and the information acquisition module 21 is configured to acquire the current white point color coordinates of the screen when a preset color calibration condition is met.
And the parameter determining module 22 is configured to compare the current white point color coordinates with prestored target white point color coordinates, and determine a register parameter group corresponding to the Gamma curve which enables the screen to reach the target white point color coordinates according to the comparison result.
And a color calibration template 23 configured to download the determined register parameter group to the driving IC and perform screen lighting using the determined register parameter group when the screen is lit.
According to the embodiment, the current white point color coordinate is compared with the pre-stored target white point color coordinate, and the register parameter group burnt by the driving IC is converted into the register parameter group capable of displaying the target white point color coordinate, so that the display difference caused by the difference between screens can be solved, and the display effect is improved.
In an alternative implementation, the color calibration condition includes at least one of the following conditions:
the electronic equipment executing the color calibration device is started for the first time;
a color calibration instruction is received.
As shown in fig. 3, fig. 3 is a block diagram of another color calibration apparatus according to an exemplary embodiment of the present disclosure, which is based on the foregoing embodiment shown in fig. 2, and the parameter determination module 22 includes:
a variation determining sub-module 221 configured to determine a variation of the current white point color coordinates from the pre-stored target white point color coordinates.
And the parameter determining submodule 222 is configured to process the recorded register parameter set in the driver IC based on the determined variation and a preset algorithm, where the preset algorithm is an algorithm for determining a relationship between the white point color coordinates and the register parameter set, to obtain the register parameter set corresponding to the Gamma curve for enabling the screen to reach the target white point color coordinates.
In an optional implementation manner, the color coordinates and brightness of white, red, green, and blue of the screen are pre-programmed in the driver IC, and the parameter determination submodule is specifically configured to:
and determining a register parameter group corresponding to a Gamma curve which enables the screen to reach the target white point color coordinate based on the burnt color coordinate and brightness, the determined variation and a preset algorithm.
In an optional implementation manner, the screen is divided into a specified number of sub-areas in advance, and each area is correspondingly provided with a register parameter group corresponding to a Gamma curve for enabling the screen to reach the target white point color coordinate. The parameter determination module 22 is specifically configured to:
comparing the current white point color coordinate with a prestored target white point color coordinate;
and if the current white point color coordinate and the prestored target white point color coordinate are not in the same sub-area, acquiring a register parameter group corresponding to the sub-area where the current white point color coordinate is located.
Correspondingly, the present disclosure also provides an electronic device, which includes a processor; a memory for storing processor-executable instructions; wherein the processor is configured to:
when a preset color calibration condition is met, acquiring the color coordinate of the current white point of the screen;
comparing the current white point color coordinate with a prestored target white point color coordinate, and determining a register parameter group corresponding to a Gamma curve which enables a screen to reach the target white point color coordinate according to a comparison result;
when the screen is lighted, the determined register parameter group is downloaded to the driving IC, and the screen is lighted by using the determined register parameter group.
Accordingly, the present disclosure also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of any of the methods described above.
The present disclosure may take the form of a computer program product embodied on one or more storage media including, but not limited to, disk storage, CD-ROM, optical storage, and the like, having program code embodied therein. Computer-usable storage media include permanent and non-permanent, removable and non-removable media, and information storage may be implemented by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of the storage medium of the computer include, but are not limited to: phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technologies, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic tape storage or other magnetic storage devices, or any other non-transmission medium, may be used to store information that may be accessed by a computing device.
The specific details of the implementation process of the functions and actions of each module in the device are referred to the implementation process of the corresponding step in the method, and are not described herein again.
For the device embodiments, since they substantially correspond to the method embodiments, reference may be made to the partial description of the method embodiments for relevant points. The above-described embodiments of the apparatus are merely illustrative, wherein the modules described as separate parts may or may not be physically separate, and the parts displayed as modules may or may not be physical modules, may be located in one place, or may be distributed on a plurality of network modules. Some or all of the modules can be selected according to actual needs to achieve the purpose of the disclosed solution. One of ordinary skill in the art can understand and implement it without inventive effort.
As shown in fig. 4, fig. 4 is a block diagram of an apparatus for color calibration shown in accordance with an exemplary embodiment of the present disclosure. The apparatus 400 may be a mobile phone with a display screen, 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, or the like.
Referring to fig. 4, the apparatus 400 may include one or more of the following components: processing components 402, memory 404, power components 406, multimedia components 408, audio components 410, input/output (I/O) interfaces 412, sensor components 414, and communication components 416.
The processing component 402 generally controls overall operation of the apparatus 400, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing component 402 may include one or more processors 420 to execute instructions to perform all or a portion of the steps of the methods described above. Further, the processing component 402 can include one or more modules that facilitate interaction between the processing component 402 and other components. For example, the processing component 402 can include a multimedia module to facilitate interaction between the multimedia component 408 and the processing component 402.
The memory 404 is configured to store various types of data to support operations at the apparatus 400. Examples of such data include instructions for any application or method operating on the device 400, contact data, phonebook data, messages, pictures, videos, and so forth. The memory 404 may be implemented by any type or combination of volatile or non-volatile memory devices 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, magnetic or optical disks.
The multimedia component 408 includes a screen that provides an output interface between the device 400 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 an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 408 includes a front facing camera and/or a rear facing camera. The front camera and/or the rear camera may receive external multimedia data when the apparatus 400 is in an operation mode, such as a photographing mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.
The audio component 410 is configured to output and/or input audio signals. For example, audio component 410 includes a Microphone (MIC) configured to receive external audio signals when apparatus 400 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may further be stored in the memory 404 or transmitted via the communication component 416. In some embodiments, audio component 410 also includes a speaker for outputting audio signals.
The I/O interface 412 provides an interface between the processing component 402 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.
The sensor component 414 includes one or more sensors for providing various aspects of status assessment for the apparatus 400. For example, the sensor assembly 414 may detect an open/closed state of the apparatus 400, the relative positioning of the components, such as a display and keypad of the apparatus 400, the sensor assembly 414 may also detect a change in the position of the apparatus 400 or one of the components of the apparatus 400, the presence or absence of user contact with the apparatus 400, orientation or acceleration/deceleration of the apparatus 400, and a change in the temperature of the apparatus 400. The sensor assembly 414 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 414 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 414 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.
The communication component 416 is configured to facilitate wired or wireless communication between the apparatus 400 and other devices. The apparatus 400 may access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 416 receives broadcast signals or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 416 further includes a Near Field Communication (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.
In an exemplary embodiment, the apparatus 400 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, micro-controllers, microprocessors or other electronic components for performing the above-described methods.
In an exemplary embodiment, a non-transitory computer-readable storage medium comprising instructions, such as the memory 404 comprising instructions, executable by the processor 420 of the apparatus 400 to perform the above-described method is also provided. 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, an optical data storage device, and the like.
Wherein the instructions in the storage medium, when executed by the processor, enable the apparatus 400 to perform a color calibration method comprising:
and when the preset color calibration condition is met, acquiring the color coordinates of the current white point of the screen.
And comparing the current white point color coordinate with a prestored target white point color coordinate, and determining a register parameter group corresponding to a Gamma curve which enables the screen to reach the target white point color coordinate according to a comparison result.
When the screen is lighted, the determined register parameter group is downloaded to the driving IC, and the screen is lighted by using the determined register parameter group.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
The above description is only exemplary of the present disclosure and should not be taken as limiting the disclosure, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present disclosure should be included in the scope of the present disclosure.
Claims (10)
1. A method of color calibration, the method comprising:
when a preset color calibration condition is met, acquiring the color coordinate of the current white point of the screen; the screen is divided into a designated number of sub-areas in advance, and each area is correspondingly provided with a register parameter group corresponding to a Gamma curve which enables the screen to reach a target white point color coordinate;
comparing the current white point color coordinate with a prestored target white point color coordinate, and determining a register parameter group corresponding to a Gamma curve which enables a screen to reach the target white point color coordinate according to a comparison result; if the current white point color coordinate and a prestored target white point color coordinate are not in the same subarea, acquiring a register parameter group corresponding to the subarea where the current white point color coordinate is located;
when the screen is lighted, the determined register parameter group is downloaded to the driving IC, and the screen is lighted by using the determined register parameter group.
2. The method according to claim 1, wherein the color calibration condition comprises at least one of:
the electronic equipment executing the color calibration method is started for the first time;
a color calibration instruction is received.
3. The method of claim 1, wherein comparing the current white point color coordinates to pre-stored target white point color coordinates and determining the set of register parameters corresponding to the Gamma curve that brings the screen to the target white point color coordinates based on the comparison, further comprises:
determining the variation of the current white point color coordinate and a prestored target white point color coordinate;
and processing the recorded register parameter group in the drive IC based on the determined variation and a preset algorithm to obtain the register parameter group corresponding to the Gamma curve which enables the screen to reach the target white point color coordinate, wherein the preset algorithm is an algorithm for determining the relation between the white point color coordinate and the register parameter group.
4. The method of claim 3, wherein the color coordinates and brightness of white, red, green and blue of the screen are pre-programmed into the driver IC, and the determining the register parameter set corresponding to the Gamma curve for the screen to reach the target white point color coordinate based on the determined variance and a preset algorithm comprises:
and determining a register parameter group corresponding to a Gamma curve which enables the screen to reach the target white point color coordinate based on the burnt color coordinate and brightness, the determined variation and a preset algorithm.
5. A color calibration device, characterized in that the device comprises:
the information acquisition module is configured to acquire the color coordinates of the current white point of the screen when a preset color calibration condition is met; the screen is divided into a designated number of sub-areas in advance, and each area is correspondingly provided with a register parameter group corresponding to a Gamma curve which enables the screen to reach a target white point color coordinate;
the parameter determination module is configured to compare the current white point color coordinate with a prestored target white point color coordinate and determine a register parameter group corresponding to a Gamma curve which enables the screen to reach the target white point color coordinate according to a comparison result; the parameter determination module is specifically configured to: comparing the current white point color coordinate with a prestored target white point color coordinate; if the current white point color coordinate and a prestored target white point color coordinate are not in the same subarea, acquiring a register parameter group corresponding to the subarea where the current white point color coordinate is located;
and a color calibration template configured to download the determined register parameter group to the driving IC and perform screen lighting using the determined register parameter group when the screen is lit.
6. The apparatus of claim 5, wherein the color calibration condition comprises at least one of:
the electronic equipment executing the color calibration device is started for the first time;
a color calibration instruction is received.
7. The apparatus of claim 5, wherein the parameter determination module comprises:
a variation determining submodule configured to determine a variation of the current white point color coordinate and a prestored target white point color coordinate;
and the parameter determining submodule is configured to process the recorded register parameter set in the drive IC based on the determined variation and a preset algorithm to obtain the register parameter set corresponding to the Gamma curve which enables the screen to reach the target white point color coordinate, and the preset algorithm is an algorithm for determining the relation between the white point color coordinate and the register parameter set.
8. The apparatus of claim 7, wherein the color coordinates and brightness of white, red, green and blue colors of the screen are pre-burned in the driver IC, and the parameter determination submodule is specifically configured to:
and determining a register parameter group corresponding to a Gamma curve which enables the screen to reach the target white point color coordinate based on the burnt color coordinate and brightness, the determined variation and a preset algorithm.
9. An electronic device, comprising:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to:
when a preset color calibration condition is met, acquiring the color coordinate of the current white point of the screen; the screen is divided into a designated number of sub-areas in advance, and each area is correspondingly provided with a register parameter group corresponding to a Gamma curve which enables the screen to reach a target white point color coordinate;
comparing the current white point color coordinate with a prestored target white point color coordinate, and determining a register parameter group corresponding to a Gamma curve which enables a screen to reach the target white point color coordinate according to a comparison result; if the current white point color coordinate and a prestored target white point color coordinate are not in the same subarea, acquiring a register parameter group corresponding to the subarea where the current white point color coordinate is located;
when the screen is lighted, the determined register parameter group is downloaded to the driving IC, and the screen is lighted by using the determined register parameter group.
10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 4.
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