Display module ink color detection, sorting and arranging method

Abstract

The present invention discloses a method for detecting, sorting and arranging the ink color of a display module. The color on the front surface of the display module is detected to obtain the measured color values in the Lab color model. The measured color values include the measured color value a, the measured color value b and the measured brightness value L in the Lab color model. The glossiness G of the display module is determined based on the measured brightness value L. The color comprehensive value of the display module is calculated based on the measured color value a, the measured color value b and the glossiness G, and the display module is screened. The screened display modules are arranged. The display modules are arranged horizontally along the gradient rule according to the color comprehensive value, and the display modules are arranged vertically along the gradient rule according to the glossiness G. Compared with the prior art, the present invention can not only make the spliced display screen maintain the progressive consistency of brightness, but also maintain the progressive consistency of color.

Description

Technical Field

[0001] The present invention relates to the detection of display modules, and in particular to a color detection and sorting of display modules. Background Art

[0002] When using display modules to splice a display screen, due to the differences in display brightness and color between display screens, the direct splicing results in poor display effects. Therefore, it is necessary to screen the display modules to select the qualified ones, and then use the qualified display modules for splicing. However, even for qualified display modules, there are still differences in their color values and brightness values. Random splicing will inevitably cause poor display effects of the screen composed of spliced display modules, and there will be problems such as screen flickering.

[0003] For this reason, in Patent CN109671364A, photos are arranged from top to bottom according to the depth of reflected color. Although this scheme sorts the screen according to the brightness of the display screen color, making the brightness gradually change in the vertical direction of the screen, when the color deviation between adjacent display screens is too large, there is still a problem of uneven color when the spliced display screen works. Therefore, there is an urgent need for a method for detecting, sorting, and arranging the ink color of display modules to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a method for detecting, sorting, and arranging the ink color of display modules, measuring and calculating the color value and glossiness of the display modules, arranging the display modules progressively along the vertical direction according to the glossiness, and arranging the display modules progressively along the horizontal direction according to the comprehensive color, so that the display screen composed of the arranged display modules can not only maintain the progressive consistency of brightness, but also maintain the progressive consistency of color.

[0005] To achieve the above purpose, the present invention discloses a method for detecting, sorting, and arranging the ink color of display modules, detecting the color of the front surface of the display module to obtain the measured color value in the Lab color model, the measured color value including the measured color value a, the measured color value b, and the measured brightness value L in the Lab color model, the Lab color model including an L brightness channel, an a color channel, and a b color channel, the a color channel being a color range from dark green to gray to bright pink, and the b color channel being a color range from bright blue to gray to yellow; determining the glossiness G of the display module according to the measured brightness value L, calculating the comprehensive color value of the display module according to the measured color value a, the measured color value b, and the glossiness G; screening the display modules according to the measured color value a, the measured color value b, and the measured brightness value L; arranging the screened display modules, arranging the display modules progressively along the horizontal direction according to the comprehensive color value according to the gradient rule, and arranging the display modules progressively along the vertical direction according to the glossiness G according to the gradient rule.

[0006] Preferably, weighting coefficients corresponding to the measured color value a, the measured color value b, and the glossiness G are assigned, and the measured color value a, the measured color value b, and the glossiness G are weighted and summed to obtain the comprehensive color value F.

[0007] Preferably, the method for detecting, sorting, and arranging the ink color of the display module further includes: detecting the color of the front surface of the display module to obtain the measured R color value, the measured G color value, and the measured B color value in the RGB color model, and converting the measured R color value, the measured G color value, and the measured B color value into the Lab space to obtain the calculated color value of the Lab color model, where the calculated color value includes the calculated color value a, the calculated color value b, and the calculated luminance value L, calculating the difference between the calculated color value and the measured color value to obtain the color difference z, and screening the display module according to the color difference z. This solution can screen out the display modules that were not screened out due to measurement device errors.

[0008] More preferably, weighting coefficients corresponding to each color component in the measured color value are assigned, weighting coefficients corresponding to each color component in the color difference z are assigned, the measured color value a, the measured color value b, the glossiness G, and the three color components of the color difference z are weighted and summed to obtain the comprehensive color value F, the weighting coefficient of the color difference z is less than or equal to the weighting coefficient of the measured color value, and the display modules are arranged horizontally according to the gradient rule based on the comprehensive color value F. This solution takes the measurement error as one of the arrangement factors, further improving the consistency and asymptote of the ink color when arranging the display modules.

[0009] Preferably, the method for detecting, sorting, and arranging the ink color of the display module also detects the color recovery percentage of the display module: emitting the first light at a preset viewing angle on the front surface of the display module, measuring the color difference R of each color component of the reflected light in the first color model, assigning weighting coefficients corresponding to each color component of the color difference R, calculating the weighted sum value H of the color differences of each color component, and according to arranging the display modules horizontally according to the gradient rule, and are the weighting coefficients of the comprehensive color value F and the weighted sum value H of the color difference, respectively, . This solution not only considers the color displayed by the display module but also the color absorbed and reflected by the display module, further reducing the light emission difference and reflection difference of the display screen after splicing the display modules caused by different glass properties on the surface of the display modules, making the consistency of the spliced display screen higher.

[0010] Specifically, the first color model is the RGB color model, the LAB color model, the CMYK color model, or the HSL model.

[0011] More preferably, when the first color model is the RGB color model, the weighting coefficient of color G in the RGB color model is greater than that of color R, increasing the influence weight of the screen's reflection of green light relative to red light and reducing the visual difference of the tiled screen caused by the human eye's sensitivity to green light.

[0012] Among them, a colorimeter is used to detect the color on the front of the display module to obtain the measured color value a and the measured color value b in the Lab color model, and a glossmeter is used to detect the gloss at a preset viewing angle on the front of the display module to obtain the measured luminance value L in the Lab color model.

[0013] Preferably, using a glossmeter to detect the gloss at a preset viewing angle on the front of the display module to obtain the test luminance value L in the Lab color model includes: selecting a light beam with a preset thickness and irradiating it onto the display module at a preset angle, dividing the irradiated surface into multiple measurement points, measuring the luminance value of each measurement point, calculating the average luminance value of all measurement points, and taking the average luminance value as the test luminance value L; or, using multiple light beams with a preset thickness to irradiate multiple measurement points on the display module respectively, measuring the luminance value of each measurement point, calculating the average luminance value of all measurement points, and taking the average luminance value as the test luminance value L.

[0014] Specifically, calculate the difference δL between the luminance value of each measurement point and the average luminance value, take the maximum difference MaxδL, and screen the display module based on the maximum difference MaxδL. Screen out the display modules with poor display luminance uniformity in the display modules.

[0015] More preferably, according to obtain the gloss G of the display module, and are the weighting coefficients of the measured luminance value L and the maximum difference MaxδL respectively, . In this solution, the display modules are arranged longitudinally according to the luminance difference, increasing the consistency and asymptoticity of the display modules arranged longitudinally.

[0016] Compared with the prior art, the present invention measures and calculates the color value and gloss of the display module respectively, arranges the display modules longitudinally according to the gloss, and arranges the display modules progressively along the horizontal direction according to the comprehensive color, so that the display screen composed of the arranged display modules can not only maintain the asymptotic consistency of the luminance, but also maintain the asymptotic consistency of the color. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a flowchart of the method for detecting, sorting and arranging the ink color of the display module in the first embodiment of the present invention.

[0018] Figure 2It is a flowchart of the method for detecting, sorting and arranging the ink color of the display module in the second embodiment of the present invention. Specific embodiments

[0019] To elaborate in detail on the technical content, structural features, achieved objectives and effects of the present invention, the following will be described in detail in conjunction with the embodiments and with reference to the drawings.

[0020] Refer to Figure 1 , the present invention discloses a method for detecting, sorting and arranging the ink color of a display module, which is used to detect and sort the ink color of the display module before using the display module to splice a display screen, and determine the arrangement order of the display screen according to the ink color gradient, so as to arrange the display modules in accordance with this arrangement order when splicing the display screen. The method for detecting, sorting and arranging the ink color of the display module includes steps S11 to S14.

[0021] Step S11, detect the color of the front surface of the display module to obtain the measured color value in the Lab color model, the measured color value includes the measured color value a, the measured color value b and the measured brightness value L in the Lab color model, the Lab color model includes an L brightness channel, an a color channel and a b color channel, the a color channel is a color range from dark green to gray to bright pink, and the b color channel is a color range from bright blue to gray to yellow.

[0022] Step S12, determine the glossiness G of the display module according to the measured brightness value L, and calculate the color comprehensive value of the display module according to the measured color value a, the measured color value b and the glossiness G. In this embodiment, the measured brightness value L is equal to the glossiness G.

[0023] Step S13, screen the display modules according to the measured color value a, the measured color value b and the measured brightness value L. Among them, the display modules in which any one of the measured color value a, the measured color value b and the measured brightness value L does not meet the preset range are screened out, so as to screen out the qualified display modules. Of course, the display modules can also be screened according to the glossiness G at the same time.

[0024] Step S14, arrange the screened display modules: arrange the display modules horizontally along the gradient law according to the color comprehensive value, and arrange the display modules vertically along the gradient law according to the glossiness G.

[0025] Preferably, arrange the screened display modules to form a display screen, the color comprehensive value gradually increases from one side to the other side, and the glossiness G gradually decreases from top to bottom.

[0026] In the first embodiment of the present invention, weighting coefficients corresponding to the measured color value a, the measured color value b, and the glossiness G are assigned, and the measured color value a, the measured color value b, and the glossiness G are weighted and summed to obtain the color comprehensive value F. In this embodiment, G = L, , where, 、 、 are the preset weighting coefficients of the measured color value a, the measured color value b, and the glossiness G respectively.

[0027] Refer to Figure 2 , in the second embodiment of the present invention, the method for detecting, sorting, and arranging the ink color of the display module further includes:

[0028] Step S15, detecting the color of the front surface of the display module to obtain the R measured color value, the G measured color value, and the B measured color value in the RGB color model.

[0029] Step S16, converting the R measured color value, the G measured color value, and the B measured color value into the Lab space to obtain the calculated color value in the Lab color model, and the calculated color value includes the calculated color value a, the calculated color value b, and the calculated luminance value L.

[0030] Step S17, calculating the difference between the calculated color value and the measured color value to obtain the color difference z.

[0031] Step S18, screening the display module according to the color difference z. The display modules with the color difference z exceeding the preset value are screened out. This solution can screen out the display modules that were not screened out due to the measurement device error.

[0032] In this embodiment, in step S12, weighting coefficients corresponding to each color component in the measured color value are assigned, weighting coefficients corresponding to each color component in the color difference z are assigned, and the measured color value a, the measured color value b, the glossiness G, and the three color components of the color difference z are weighted and summed to obtain the color comprehensive value F. The weighting coefficient of the color difference z is less than or equal to the weighting coefficient of the measured color value. In step S14, the display modules are arranged horizontally along according to the color comprehensive value F according to the law of gradual change. In this embodiment, the glossiness G is equal to the measured luminance value L.

[0033] Specifically, , the color difference z includes the color value a difference , the color value b difference and the luminance value L difference , 、 、 are the color value a difference , the color value b difference and the difference in brightness value L a preset weighting coefficient, where , , .

[0034] In the second embodiment of the present invention, the method for detecting, sorting and arranging the ink color of the display module further includes:

[0035] Step S19, detecting the color recovery percentage of the display module: emitting first light at a preset viewing angle on the front of the display module, and measuring the color difference R of each color component of the reflected light in the first color model.

[0036] Step S20, assigning a weighting coefficient to each color component in the color difference R, and calculating the weighted sum value H of the color differences of the color components.

[0037] S21, according to correct the comprehensive color value F, and arrange the display modules horizontally along the horizontal direction according to the corrected comprehensive color value F according to the law of gradual change, and are the weighting coefficients of the comprehensive color value F and the weighted sum value H of the color differences respectively, .

[0038] Specifically, the first color model is an RGB color model, an LAB color model, a CMYK color model or an HSL model. Among them, when the first color model is an RGB color model, the weighting coefficient of color G in the RGB color model is greater than the weighting coefficient of color R, increasing the influence weight of the screen's reflection of green light relative to red light, and reducing the visual difference of the tiled screen caused by the sensitivity of the human eye to green light.

[0039] Among them, a colorimeter is used to detect the color of the front of the display module to obtain the measured color value a and the measured color value b in the Lab color model, and a glossmeter is used to detect the gloss at a preset viewing angle on the front of the display module to obtain the measured brightness value L in the Lab color model. In this embodiment, the preset viewing angle is 60 degrees. Of course, this preset viewing angle can also be other viewing angles set by those skilled in the art.

[0040] In the third embodiment of the present invention, detecting the glossiness at a preset viewing angle on the front surface of the display module using a glossiness meter to obtain the test luminance value L in the Lab color model includes: S111 selecting a light beam with a preset thickness and irradiating it onto the display module at a preset angle (in this embodiment, a relatively thick light beam is used for irradiation), S112 dividing the irradiation surface into multiple measurement points and measuring the luminance value at each measurement point, S113 calculating the average luminance value of all measurement points and taking the average luminance value as the test luminance value L. Of course, in another embodiment, multiple relatively thin light beams are used to irradiate multiple measurement points on the display module respectively, measuring the luminance value at each measurement point, calculating the average luminance value of all measurement points, and taking the average luminance value as the test luminance value L. In yet another embodiment, a light beam can also be used to irradiate the center of the display module and detect the luminance value at the center of the display module as the test luminance value L of the display module.

[0041] Preferably, in this embodiment, the method for detecting, sorting, and arranging the ink color of the display module further includes: step S21, calculating the difference δL between the luminance value of each measurement point and the average luminance value, taking the maximum difference MaxδL, and screening the display module based on the maximum difference MaxδL.

[0042] Preferably, in step S12, according to obtain the glossiness G of the display module, and are the weighting coefficients for measuring the luminance value L and the maximum difference MaxδL respectively, . This solution arranges the display modules longitudinally according to the luminance difference, increasing the consistency and asymptoticity of the arrangement of the display modules in the longitudinal direction.

[0043] The above-disclosed are only the preferred embodiments of the present invention. Of course, the scope of the rights of the present invention cannot be limited thereby. Therefore, equivalent changes made according to the scope of the patent application of the present invention still fall within the scope covered by the present invention.

Claims

1. A method for detecting, sorting and arranging the ink color of a display module, characterized in that: Including: Detect the color of the front of the display module to obtain the measured color values in the Lab color model. The measured color values include the measured color value a, the measured color value b, and the measured brightness value L in the Lab color model. The Lab color model includes an L brightness channel, an a color channel, and a b color channel. The a color channel is a color range from dark green to gray to bright pink, and the b color channel is a color range from bright blue to gray to yellow; Determine the gloss G of the display module according to the measured brightness value L, and calculate the color comprehensive value of the display module according to the measured color value a, the measured color value b, and the gloss G; Screen the display module according to the measured color value a, the measured color value b, and the measured brightness value L; Arrange the screened display modules. Arrange the display modules horizontally along the horizontal direction according to the gradient rule according to the color comprehensive value, and arrange the display modules vertically along the vertical direction according to the gradient rule according to the gloss G; Detect the color of the front of the display module to obtain the measured R color value, the measured G color value, and the measured B color value in the RGB color model; Convert the measured R color value, the measured G color value, and the measured B color value into the Lab space to obtain the calculated color values in the Lab color model. The calculated color values include the calculated color value a, the calculated color value b, and the calculated brightness value L; Calculate the difference between the calculated color values and the measured color values to obtain the color difference z, and screen the display module according to the color difference z.

2. The method for detecting, sorting and arranging the ink color of the display module according to claim 1, wherein: Assign corresponding weighting coefficients to the measured color value a, the measured color value b, and the gloss G, and perform weighted summation on the measured color value a, the measured color value b, and the gloss G to obtain the color comprehensive value F.

3. The ink color detection, sorting and arranging method for a display module according to claim 1, wherein: Assign corresponding weighting coefficients to each color component in the measured color values, assign corresponding weighting coefficients to each color component in the color difference z, and perform weighted summation on the measured color value a, the measured color value b, the gloss G, and the three color components of the color difference z to obtain the color comprehensive value F. The weighting coefficient of the color difference z is less than or equal to the weighting coefficient of the measured color values. Arrange the display modules horizontally along the horizontal direction according to the gradient rule according to the color comprehensive value F.

4. The method for detecting, sorting and arranging the ink color of the display module according to claim 1, wherein: The color recovery percentage of the display module is also detected: a first light ray is emitted at a preset viewing angle on the front of the display module, the color difference R of each color component of the reflected light ray in the first color model is measured, a weighting coefficient is assigned to each color component in the color difference R, the weighted sum value H of the color differences of each color component is calculated, and based on The display modules are arranged horizontally along the horizontal direction according to a gradient rule, and are the weighting coefficients of the color comprehensive value F and the weighted sum value H of the color difference, respectively, .

5. The method for detecting, sorting and arranging the ink color of the display module according to claim 4, wherein: The first color model is the RGB color model, the LAB color model, the CMYK color model, or the HSL model. When the first color model is the RGB color model, the weighting coefficient of the color G in the RGB color model is greater than the weighting coefficient of the color R.

6. The method for detecting, sorting and arranging the ink color of the display module according to claim 1, wherein: Use a colorimeter to detect the color of the front of the display module to obtain the measured color value a and the measured color value b in the Lab color model, and use a gloss meter to detect the gloss at a preset viewing angle on the front of the display module to obtain the measured brightness value L in the Lab color model.

7. The ink color detection, sorting and arranging method of the display module according to claim 6, characterized in that: Detecting the glossiness at a preset viewing angle on the front side of the display module using a glossiness meter to obtain the test luminance value L in the Lab color model includes: selecting a light beam with a preset thickness and irradiating it onto the display module at a preset angle, dividing the irradiation surface into multiple measurement points, measuring the luminance value of each measurement point, calculating the average luminance value of all measurement points, and taking the average luminance value as the test luminance value L; Alternatively, irradiating multiple measurement points on the display module with multiple light beams of preset thicknesses respectively, measuring the luminance value of each measurement point, calculating the average luminance value of all measurement points, and taking the average luminance value as the test luminance value L.

8. The method for detecting, sorting and arranging the ink color of the display module according to claim 7, wherein: Calculating the difference δL between the luminance value of each measurement point and the average luminance value, taking the maximum difference MaxδL, and screening the display module based on the maximum difference MaxδL.

9. The method for detecting, sorting and arranging the ink color of the display module according to claim 8, wherein: According to obtain the glossiness G and are respectively the weighting coefficients for measuring the luminance value L and the maximum difference MaxδL .

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