TWI701649B - Display correction method and system thereof - Google Patents

Abstract

A display correction method and system thereof is provided and includes: analyzing a display via a color analyzing apparatus and generating a raw display data; adjusting a resolution of the display. In a first resolution and a second resolution, acquiring an interpolating value and an extrapolating value within a first range and a second range by repeatedly performing an interpolation and an extrapolation according to the raw display data, and the first resolution is less than the second resolution; acquiring an interior value by calculating the interpolating value and the extrapolating value via a linear interpolation compensation and acquiring a difference between the interior value and the raw display data; comparing the difference with a threshold value to obtain a comparing result; gradually adjusting color parameter in different area on the display according to the comparing result.

Description

Display calibration method and system

The present invention claims the priority of Chinese Patent Application No. 201910266132.1 (application date: April 03, 2019), the complete content of which is incorporated into this invention patent specification for reference.

The invention relates to a display calibration method and system, in particular to a display calibration method and system for calibrating displays for different liquid crystal display modules.

In the market, liquid crystal modules (LCM) produced by different manufacturers are not the same. Different liquid crystal modules have different display effects, and the liquid crystal display panels themselves may have some characteristic differences. Therefore, generally speaking, the display calibration of the display is performed before the display leaves the factory.

The existing display calibration method is to perform accurate and high-resolution two-dimensional measurement of the brightness distribution and chromaticity distribution of the display through a color analyzer, and perform uniformity calibration based on the measurement result. However, for liquid crystal display modules with inferior characteristics, the existing unified calibration method for displays cannot obtain good calibration results. Even if some monitors have completed a unified calibration method, the uniformity and color of the LCD module will be worse. Poor, completely unable to achieve the display effect required by the customer.

Therefore, there is a need to propose a calibration method for different liquid crystal display modules that can perform different display calibrations according to liquid crystal display modules with different characteristics.

The technical problem to be solved by the present invention is to provide a new display calibration method and system for the deficiencies of the prior art, which can perform different display calibrations according to liquid crystal display modules with different characteristics.

According to the above objective, the present invention proposes a display calibration method, which includes: analyzing the display with a color analyzer and generating original display data; adjusting the resolution of the display, and respectively at the first resolution and the second resolution, According to the original display data, the interpolation and extrapolation methods are repeated to obtain the inner difference and the extrapolation value in the first range and the second range, and the first resolution is smaller than the second resolution; the interpolation and the extrapolation are passed through Linear difference compensation is calculated to obtain internal and external interpolation, and to obtain the difference between the internal and external interpolation and the original display data; compare the difference with the threshold value to obtain the comparison result; and according to the comparison result, adjust the color parameters of the display in a progressive manner.

Furthermore, in the step of adjusting the resolution of the display and obtaining the interpolated value and the extrapolated value, the display is divided into a plurality of first display areas at the first resolution, and based on the original display data and the plurality of first display areas Display area, calculate the interpolated value by interpolation.

Furthermore, after the display is divided into a plurality of first display areas, each first display area has a first original display data, and the display is calculated based on the center point of each first display area and the surrounding first original display data Average, and calculate the interpolated value of the display based on the displayed average value and the original display data, update the original display data according to the interpolated value, and then calculate the interpolated value of each first display area repeatedly according to the updated original display data until The interpolated value is in a first range.

Furthermore, in the step of adjusting the resolution of the display, the display is further adjusted to the second resolution, the display is divided into a plurality of second display areas, and the extrapolation method is used to calculate the extrapolated value according to the second display area.

Furthermore, the second display area located at the center point is set as the reference display area, and the original display data of the reference display area and the original display data of the surrounding second display area are extrapolated to calculate to obtain the extrapolated value, According to the extrapolated value, update the original display data of the second display area, and then calculate the extrapolated value of each second display area repeatedly according to the updated original display data and the original display data of the reference display area until the extrapolated value is in the second range Inside.

Furthermore, in the step of obtaining the inner and outer interpolation values, a linear difference compensation calculation is performed based on the interpolation value and the outer interpolation value to obtain the inner and outer interpolation values of each second display area.

Furthermore, in the step of comparing the difference value with the threshold value to obtain the comparison result, the difference value of each second display area is compared with the threshold value to confirm whether the internal and external interpolation value of the second display area is the same as the original display The difference between the data is within the threshold.

Furthermore, the progressive method is to divide the display into multiple areas, and adjust the color parameters of the display according to the distance of the area close to the center point.

According to the above objective, the present invention provides a display calibration system, which includes a display, a color analyzer, a resolution adjustment module, a calculation module, a comparison module, and a calibration module. The color analyzer is used to obtain the display image of the display, and the resolution adjustment module is connected to the color analyzer to adjust the resolution of the displayed image and divide the displayed image into a multi-dimensional matrix. The calculation module is connected to the resolution adjustment module. The calculation module performs interpolation calculation or extrapolation calculation according to different resolutions to obtain the interpolation value and extrapolation value of the displayed image; the comparison module is connected to the calculation module, and the comparison module is based on The difference calculated by the calculation module is compared with the threshold value, and then the comparison result is output. The calibration module is connected to the comparison module, receives the comparison result output by the comparison module, and performs the display calibration of the display in a progressive manner according to the comparison result.

Furthermore, the resolution adjustment module, calculation module, comparison module and calibration module are installed in a computer system.

The beneficial effect of the present invention is that the color of each display area in the display can be corrected to different degrees. Compared with the existing display that can only be uniformly corrected to the same degree, the correction method of the present invention can obtain more accurate color correction. .

In order to further understand the features and technical content of the present invention, please refer to the following detailed description and drawings about the present invention. However, the provided drawings are only for reference and description, and are not used to limit the present invention.

The following is a specific embodiment to illustrate the implementation of the "display calibration method and system" disclosed in the present invention. Those skilled in the art can understand the advantages and effects of the present invention from the content disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of the present invention. In addition, the drawings of the present invention are merely schematic illustrations, and are not drawn according to actual dimensions, and are stated in advance. The following embodiments will further describe the related technical content of the present invention in detail, but the disclosed content is not intended to limit the protection scope of the present invention.

It should be understood that although terms such as “first”, “second”, and “third” may be used herein to describe various elements or signals, these elements or signals should not be limited by these terms. These terms are mainly used to distinguish one element from another, or one signal from another signal. In addition, the term "or" used in this document may include any one or a combination of more of the associated listed items depending on the actual situation.

[Embodiment of the display calibration method of the present invention]

FIG. 1 is a flowchart of a display calibration method. As shown in FIG. 1, the display calibration method of the present invention includes the following steps. In step S101, a display is analyzed by a color analyzer, and original display data is generated. Generally speaking, the color analyzer can be a color analyzer of model CA2500, but in different embodiments, different color analyzers can also be used, which is not limited here. In the present invention, the color performance of the display to be tested is first analyzed to obtain the original display data of the display, and then interpolation calculations are performed based on the original display data.

In step S102, the resolution of the display is adjusted, and the interpolation method and the extrapolation method are performed according to the original display data at the first resolution and the second resolution respectively to obtain the interpolated values in the first range and the second range With extrapolation. After the color analyzer analyzes the display, the original display data of the color and brightness distribution of the display can be obtained. Next, adjust the resolution of the display, and perform linear difference compensation calculations at the first resolution and the second resolution to obtain the interpolated values and extrapolated values that conform to the first range and the second range, as shown in Figures 2A-2C. Show. For example, assuming that the original resolution of the display is 60X33, adjust the resolution of the display 20 to 5X5. The resolution of 5X5 is referred to as the first resolution 21 here, and the display is divided into 5X5=25 first display areas However, in different embodiments, it can also be divided into 3*3, 7*7, 9*9,... Or n*m first display areas, which is not limited here.

Then, according to the original display data and the plurality of first display areas, an interpolation value is calculated by interpolation. Furthermore, in the display calibration method of the present invention, after the display is divided into a plurality of first display areas, each first display area has a first original display data, according to the center point of each first display area and the surrounding The first original display data, calculate and display the average value. In order to avoid the excessive deviation of the color and brightness of each first display area, the display average value of each first display area is obtained, and the interpolation value of the display is calculated based on the display average value and the original display data. According to the interpolation value, the original display data is updated, and then according to the updated original display data, the interpolation value of each first display area is repeatedly calculated until the interpolation value is within the first range. According to the first original display data of each first display area and the display average, the interpolation value of each first display area is calculated by interpolation.

Next, restore the resolution of the display, which is referred to herein as the second resolution 22, as shown in FIG. 2C, and divide the display into multiple second display areas. For example, after the interpolation calculation is completed, the resolution of the display is restored from 5X5 to 60X33, and the display is divided into a plurality of second display areas, and the extrapolation method is used to calculate the extrapolation value according to the second display area. The second display area located at the center point is set as the reference display area, and the original display data of the reference display area and the surrounding original display data of multiple second display areas are extrapolated to calculate to obtain the extrapolated value. According to the extrapolated value, update the original display data of multiple second display areas, and then calculate the extrapolated value of each second display area repeatedly according to the updated original display data and the original display data of the reference display area until the extrapolated value is in the first 2. Within the scope. In addition, the first resolution is smaller than the second resolution.

In step S103, the interpolation value and the extrapolation value are calculated by linear difference compensation to obtain the inner and outer interpolation value, and the difference between the inner and outer interpolation value and the original display data is calculated. The interpolation value and the extrapolation value calculated in step S102 are further subjected to linear difference compensation calculation to obtain the inner and outer interpolation value. In detail, the linear difference compensation calculation is performed according to the interpolation value and the extrapolation value to obtain the inner and outer interpolation values of each second display area, and the difference between the original display data of each second display area and the inner and outer interpolation values is calculated. Calculate the difference between the internal and external interpolation of the second display area and the original display data.

In step S104, the difference value is compared with the threshold value to obtain a comparison result. The difference of the second display area calculated in step S103 is compared with the threshold value to obtain a comparison result. The difference between the second display area and the threshold value is compared to confirm whether the difference between the internal and external interpolation value of the second display area and the original display data is within the threshold value.

In step S105, according to the comparison result, the color parameters of the display are adjusted in a progressive manner. If the comparison result is within the range of the display specification (specification) of the display, it means that the corrected result is close to the display specification of the display, and the display compensation correction of the display is performed by interpolation and interpolation in a progressive manner. If the comparison result is not within the display specification range of the monitor, it means that the above calculation result has not reached the expectation, and it needs to be repeated once until the comparison result is within the display specification range of the monitor to achieve the display correction effect of the monitor.

In addition, the so-called progressive method, for example, as shown in Figure 2D, the display area of the display is divided into three major areas, the first area 23 is the internal area, accounting for 32% of all display areas of the display, the first area 23 is the most In the area close to the reference display area at the center point, the color distortion or color difference presented in this area will be obvious, and greater color compensation is required. The second area 24 is an area slightly farther from the reference display area, accounting for approximately 48% (32%-80%) of all areas of the display. The color distortion presented in this area is not so obvious, and only moderate color compensation is required. The third area 25 is the area farthest from the reference display area. It belongs to the outer area of the display, accounting for about 20% (80%~100%) of all areas of the display. Because it belongs to the peripheral area of the display area, the color difference is not easy to see Only slight color compensation is required.

With the display calibration method of the present invention, different degrees of correction can be performed for the colors of each display area. Compared with the existing display that can only be uniformly corrected to the same degree, the correction method of the present invention can obtain more accurate color correction.

[Embodiments of the display calibration system of the present invention]

Figure 3 is a display calibration system of the present invention. As shown in FIG. 3, the display calibration system 30 of the present invention includes a display 31, a color analyzer 32, a resolution adjustment module 33, a calculation module 34, a comparison module 35 and a calibration module 36.

The display 31 is a liquid crystal display that needs to be calibrated, and the color analyzer 32 may be a color analyzer of model CA2500, but in different embodiments, different color analyzers may also be used, which is not limited here. The color analyzer 32 is used to obtain the display image of the display 31, and to understand the display condition of the display 31 according to the measured display image of the display 31, and then to confirm whether the display 31 needs calibration. The resolution adjustment module 33 is connected to the color analyzer 32, which can adjust the resolution of the displayed image analyzed by the color analyzer 32, and can divide the image displayed on the display 31 into a multi-dimensional matrix. The display calibration system 30 of the present invention performs interpolation calculations according to different display image resolutions, and then performs calibration of the display 31.

The calculation module 34 is connected to the resolution adjustment module 33, and the calculation module 34 performs interpolation calculation or extrapolation calculation according to different resolutions to obtain the interpolation value and the extrapolation value of the displayed image of the display 31. Then, according to the interpolated value and the extrapolated value, the calculation module 34 calculates the interpolated value. The calculation module 34 can further calculate the inner and outer interpolation values, and can also calculate the difference between the inner and outer interpolation values and the original displayed data. The comparison module 35 is connected to the calculation module 34. The comparison module 35 compares the difference calculated by the calculation module with the threshold value, and then outputs the comparison result. The calibration module 36 is connected to the comparison module 35 to receive the comparison result output by the comparison module, and the calibration module performs the display calibration of the display in a progressive manner according to the received comparison result. In addition, it should be noted here that the resolution adjustment module 33, the calculation module 34, the comparison module 35 and the calibration module 36 in the display calibration system 30 are installed in a computer system, which can be a desktop Laptops, laptops or tablets are not limited here.

The so-called progressive method, for example, the display area of the display 31 is divided into three major areas, the first area is the internal area, accounting for 32% of the display area of the display 31, and the first area is the reference display closest to the center point. In the area of the area, the color distortion or color difference presented in this area will be obvious, and greater color compensation is required. The second area is an area slightly farther from the reference display area, accounting for approximately 48% (32%-80%) of all areas of the display 31. The color distortion presented in this area is not so obvious, and only moderate color compensation is required. The third area is the area farthest from the reference display area. It belongs to the outer area of the display 31 and accounts for about 20% (80%~100%) of all areas of the display 31. Because it belongs to the peripheral area of the display 31, the color difference is not easy It can be seen that only slight color compensation is required.

[Beneficial effects of the embodiment]

The beneficial effect of the present invention is that the color of each display area in the display can be corrected to different degrees. Compared with the existing display that can only be uniformly corrected to the same degree, the correction method of the present invention can obtain more accurate color correction. .

The content disclosed above is only a preferred and feasible embodiment of the present invention, and does not limit the scope of the patent application of the present invention. Therefore, all equivalent technical changes made using the description and schematic content of the present invention are included in the application of the present invention. Within the scope of the patent.

S101-S105: steps 20: display 21: The first resolution 22: second resolution 23: The first area 24: second area 25: The third area 30: Display calibration system 31: display 32: color analyzer 33: Resolution adjustment module 34: calculation module 35: Comparison module 36: Calibration module

FIG. 1 is a flowchart of a display calibration method according to an embodiment of the present invention.

2A-2D are schematic diagrams of the display area of the display.

Fig. 3 is a block diagram of a display calibration system according to an embodiment of the present invention.

S101-S105: steps

Claims (10)

A display calibration method, which includes: analyzing a display by a color analyzer and generating original display data; adjusting the resolution of the display, and respectively at the first resolution and the second resolution, according to the The original display data, interpolation and extrapolation are repeated to obtain the interpolation value and the extrapolation value in the first range and the second range, and the first resolution is smaller than the second resolution; and the interpolation value The inner and outer interpolation values are calculated by linear difference compensation with the extrapolation value, and the difference between the inner and outer interpolation value and the original display data is obtained; the difference value is compared with a threshold value to obtain the comparison result; and According to the comparison result, the color parameters of the display are adjusted in a progressive manner. The display calibration method according to the first item of the scope of patent application, wherein, in the step of adjusting the resolution of the display and obtaining the interpolated value and the extrapolated value, the display is set in the first The resolution is divided into a plurality of first display areas, and the interpolation value is calculated by the interpolation method according to the original display data and the plurality of first display areas. According to the display calibration method described in item 2 of the scope of patent application, after the display is divided into the plurality of first display areas, each of the plurality of first display areas has a first original display data, according to The center point of each of the plurality of first display areas and the surrounding first original display data are calculated to display an average value, and the display value of the display is calculated based on the display average value and the original display data Interpolation value, update the original display data according to the interpolation value, and then calculate the interpolation value of each of the plurality of first display areas repeatedly according to the updated original display data until the interpolation value Within the first range. The display calibration method as described in item 1 of the scope of patent application, wherein In the step of the resolution of the display, the display is further divided into a plurality of second display areas when the display is at the second resolution, and according to the plurality of second display areas, the external The interpolation method calculates the extrapolated value. The display calibration method according to item 4 of the scope of patent application, wherein one of the plurality of second display areas located at the center point is set as a reference display area, and the original display of the reference display area Data and the surrounding original display data of the plurality of second display areas are calculated by extrapolation to obtain an extrapolated value, and the original display data of the plurality of second display areas are updated according to the extrapolated value, Then, according to the updated original display data and the original display data of the reference display area, the extrapolated value of each of the plurality of second display areas is repeatedly calculated until the extrapolated value is in the first 2. Within the scope. The display calibration method described in item 4 of the scope of patent application, wherein, in the step of obtaining the inner and outer interpolation values, the linear difference compensation calculation is performed according to the interpolation value and the extrapolation value to obtain each of the The inner and outer interpolation of the plurality of second display areas. The display calibration method described in item 4 of the scope of patent application, wherein, in the step of comparing the difference value with the threshold value to obtain the comparison result, each of the plurality of second display The difference value of the area is compared with the threshold value to confirm whether the difference between the inner and outer interpolation values of the plurality of second display areas and the original display data is within the threshold value. The display calibration method according to the first item of the scope of patent application, wherein the progressive method is to divide the display into a plurality of areas, and adjust the color parameters of the display according to the distance of the multiple areas close to the center point. A display calibration system, comprising: a display; a color analyzer to obtain the display image of the display; a resolution adjustment module connected to the color analyzer and used to adjust the resolution of the display image , And divide the display image into a multi-dimensional matrix; A calculation module is connected to the resolution adjustment module, and the calculation module performs interpolation calculation or extrapolation calculation according to different resolutions to obtain the interpolation value and the extrapolation value of the display image, and then obtain an inner and outer Interpolation, and calculate a difference between the internal and external interpolation and an original display data; a comparison module, connected to the calculation module, the comparison module according to the difference calculated by the calculation module Compare with a threshold value, and then output the comparison result; and a calibration module, connected to the comparison module, receives the comparison result output by the comparison module, and performs all the results in a progressive manner according to the comparison result. The display calibration of the display. According to the display calibration system described in item 9 of the scope of patent application, the resolution adjustment module, the calculation module, the comparison module and the calibration module are installed in a computer system.

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