CN108154540B - Method and device for determining optimal chroma and brightness and computer readable storage medium - Google Patents
Method and device for determining optimal chroma and brightness and computer readable storage medium Download PDFInfo
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Abstract
The invention discloses a method and a device for determining optimal chromaticity and brightness and a computer readable storage medium. When the LCD display module is lightened, the actual chromaticity and the actual brightness of RGB three channels under the preset gray scale are obtained; obtaining a chromaticity range and a brightness range specified by a client, selecting a plurality of chromaticities to be tested from the chromaticity range, and selecting a plurality of brightnesses to be tested from the brightness range; traversing the chromaticity to be measured and the brightness to be measured, determining the traversed effective brightness according to the actual chromaticity and the actual brightness, and taking the effective brightness with the maximum brightness as the target brightness corresponding to the current chromaticity after all the brightnesses to be measured are selected; after traversing the chromaticity to be tested, the target brightness with the maximum brightness is used as the optimal brightness, the chromaticity corresponding to the optimal brightness is used as the optimal chromaticity, and the LCD display module can be burned according to the optimal chromaticity and the optimal brightness, so that the burned LCD display module has a better display effect, and the market competitiveness of the LCD display module leaving the factory is improved.
Description
Technical Field
The invention relates to the technical field of display screens, in particular to a method and a device for determining optimal chromaticity and brightness and a computer readable storage medium.
Background
Before a Liquid Crystal Display Module (LCD) leaves a factory, 3Gamma (Gamma) burning of the LCD Display Module can be carried out according to the chromaticity and brightness range specified by a customer, and due to the difference of each LCD Display Module, the burnt 3Gamma values are different, so that in the prior art, the brightness of each LCD Display Module can only fall near the lowest value of the brightness range specified by the customer after burning, and the optimal chromaticity and brightness value which can be regulated and calibrated in the parameter range specified by the customer of each LCD Display Module cannot be found. Therefore, how to adjust the LCD display module to the best chromaticity and brightness value for the customer as much as possible on the basis of the specification parameters of the display screen specified by the customer makes the burned LCD display module have better display effect while meeting the customer requirements, improves the market competitiveness of the LCD display module leaving the factory, and is a problem to be solved urgently.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention mainly aims to provide a method and a device for determining optimal chromaticity and brightness and a computer readable storage medium, and aims to solve the technical problem that the optimal chromaticity and brightness values which can be adjusted and calibrated in a parameter interval specified by a client of each LCD display module cannot be found when the existing LCD display module is burnt.
To achieve the above object, the present invention provides an optimal chromaticity and luminance determining method, including the steps of:
when the LCD display module is lightened, acquiring the actual chromaticity and the actual brightness of RGB three channels of the LCD display module under a preset gray scale;
acquiring a designated chromaticity range and a designated brightness range, selecting a plurality of chromaticities to be tested from the designated chromaticity range, and selecting a plurality of brightnesses to be tested from the designated brightness range;
traversing the chromaticity to be detected, and taking the traversed chromaticity to be detected as the current chromaticity;
selecting one of the to-be-detected brightnesses as a current brightness;
determining theoretical brightness of RGB three channels in a white picture of the LCD display module according to the current chromaticity, the current brightness and the actual chromaticity;
when the theoretical brightness does not exceed the actual brightness, judging the current brightness to be effective brightness, returning to the step of selecting one from the to-be-detected brightness as the current brightness, and taking the effective brightness with the maximum brightness as the target brightness corresponding to the current chromaticity after all the to-be-detected brightnesses are selected;
after traversing the chromaticity to be detected, taking the target brightness with the maximum brightness as the optimal brightness, and taking the chromaticity corresponding to the optimal brightness as the optimal chromaticity;
wherein the theoretical brightness is determined by:
respectively obtaining the normalized brightness values of RGB three channels in the white picture of the LCD display module through the following formulas according to the current chromaticity and the actual chromaticity,
wherein, LR is an R channel normalized luminance value in a white picture of the LCD display module, LG is a G channel normalized luminance value in a white picture of the LCD display module, LB is a B channel normalized luminance value in a white picture of the LCD display module, (x, y) is a current chromaticity, (xR, yR) is an actual chromaticity of the R channel of the LCD display module at a preset gray scale, (xG, yG) is an actual chromaticity of the G channel of the LCD display module at a preset gray scale, and (xB, yB) is an actual chromaticity of the B channel of the LCD display module at a preset gray scale;
respectively determining the theoretical brightness of RGB three channels in the white picture of the LCD module by the following formula according to the current brightness and the normalized brightness value,
lu is the current brightness, LuR is the theoretical brightness of the R channel of the LCD module in the white picture, LuG is the theoretical brightness of the G channel of the LCD module in the white picture, and LuB is the theoretical brightness of the B channel of the LCD module in the white picture.
Preferably, before determining that the current brightness is the effective brightness when the theoretical brightness does not exceed the actual brightness, the method further includes:
comparing the theoretical brightness with the actual brightness;
when the comparison result meets the following formula, judging that the theoretical brightness does not exceed the actual brightness;
wherein the content of the first and second substances,
the LRMax is the actual brightness of the R channel of the LCD display module under the preset gray scale, the LGMax is the actual brightness of the G channel of the LCD display module under the preset gray scale, and the LBMax is the actual brightness of the B channel of the LCD display module under the preset gray scale.
Preferably, the obtaining of the designated chromaticity range and the designated luminance range, selecting a plurality of chromaticities to be measured from the designated chromaticity range, and selecting a plurality of luminances to be measured from the designated luminance range specifically include:
acquiring a designated chromaticity range and a designated brightness range, and determining a preset chromaticity step length according to the designated chromaticity range;
and performing discrete sampling on the designated chromaticity range according to the preset chromaticity step length to obtain a plurality of chromaticities to be detected, and selecting a plurality of luminances to be detected from the designated luminance range.
Preferably, the selecting a plurality of luminances to be measured from the specified luminance range specifically includes:
and acquiring a preset brightness step length, splitting the appointed brightness range according to the preset brightness step length, and acquiring a plurality of to-be-detected brightnesses.
Preferably, after the target luminance corresponding to the current chromaticity is the effective luminance with the maximum luminance, the method further includes:
adding the current chroma and the target brightness corresponding to the current chroma into a mapping relation;
correspondingly, after the traversal of the chromaticity to be measured is completed, taking the target brightness with the maximum brightness as the optimal brightness, and taking the chromaticity corresponding to the optimal brightness as the optimal chromaticity specifically includes:
after traversing the chromaticity to be detected, taking the target brightness with the maximum brightness as the optimal brightness;
and searching the target chromaticity corresponding to the optimal brightness in the mapping relation, and taking the searched target chromaticity as the optimal chromaticity.
Further, to achieve the above object, the present invention also proposes an optimum chromaticity and luminance determining apparatus, comprising: a memory, a processor and an optimal chrominance and luminance determining program stored on said memory and executable on said processor, said optimal chrominance and luminance determining program being configured to implement the steps of the optimal chrominance and luminance determining method as described above.
Furthermore, to achieve the above object, the present invention also proposes a readable storage medium having stored thereon an optimal chromaticity and luminance determining program which, when executed by a processor, implements the steps of the optimal chromaticity and luminance determining method as described above.
The method for determining the optimal chromaticity and brightness can adjust the LCD display module to the optimal chromaticity and brightness as far as possible for customers on the basis of the display screen specification parameters (namely the specified chromaticity range and the specified brightness range) specified by the customers, so that the burnt LCD display module has better display effect while meeting the requirements of the customers, and the market competitiveness of the LCD display module leaving the factory is improved.
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Fig. 1 is a schematic structural diagram of an optimal chromaticity and luminance determining apparatus for a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating a first embodiment of a method for determining optimal chrominance and luminance according to the present invention;
FIG. 3 is a flowchart illustrating a second embodiment of the method for determining optimal chrominance and luminance according to the present invention;
fig. 4 is a flowchart illustrating a method for determining optimal chrominance and luminance according to a third embodiment of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an optimal chromaticity and luminance determining apparatus for a hardware operating environment according to an embodiment of the present invention.
As shown in fig. 1, the optimal chrominance and luminance determining apparatus (hereinafter, referred to as an apparatus) may include: a processor 1001, such as a CPU, a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface). The memory 1005 may be a high-speed RAM memory or a non-volatile memory (e.g., a magnetic disk memory). The memory 1005 may alternatively be a storage device separate from the processor 1001.
Those skilled in the art will appreciate that the configuration shown in fig. 1 does not constitute a limitation of the apparatus, and may include more or fewer components than those shown, or some components in combination, or a different arrangement of components.
As shown in fig. 1, a memory 1005, which is a storage medium, may include therein an operating system, a data storage module, a network communication module, a user interface module, and an optimal chromaticity and brightness determination program.
The device can be a device or equipment capable of carrying out display screen parameter measurement, display screen burning and data operation or processing on various display screens (such as LCDs).
In the apparatus shown in fig. 1, the network interface 1004 is mainly used for data communication with the backend server; the user interface 1003 is mainly used for data interaction with a user; the processor 1001 and the memory 1005 in the mobile terminal of the present invention may be provided in the apparatus, which calls the optimum chromaticity and luminance determining program stored in the memory 1005 through the processor 1001 and performs the following operations:
when the LCD display module is lightened, acquiring the actual chromaticity and the actual brightness of RGB three channels of the LCD display module under a preset gray scale;
acquiring a designated chromaticity range and a designated brightness range, selecting a plurality of chromaticities to be tested from the designated chromaticity range, and selecting a plurality of brightnesses to be tested from the designated brightness range;
traversing the chromaticity to be detected, and taking the traversed chromaticity to be detected as the current chromaticity;
selecting one of the to-be-detected brightnesses as a current brightness;
determining theoretical brightness of RGB three channels in a white picture of the LCD display module according to the current chromaticity, the current brightness and the actual chromaticity;
when the theoretical brightness does not exceed the actual brightness, judging the current brightness to be effective brightness, returning to the step of selecting one from the to-be-detected brightness as the current brightness, and taking the effective brightness with the maximum brightness as the target brightness corresponding to the current chromaticity after all the to-be-detected brightness is selected;
and after traversing the chromaticity to be detected, taking the target brightness with the maximum brightness as the optimal brightness, and taking the chromaticity corresponding to the optimal brightness as the optimal chromaticity.
Further, the processor 1001 may call the optimal chrominance and luminance determination program stored in the memory 1005, and also perform the following operations:
respectively acquiring normalized brightness values of RGB three channels in a white picture of the LCD display module according to the current chromaticity and the actual chromaticity;
and respectively determining the theoretical brightness of RGB three channels in the white picture of the LCD display module according to the current brightness and the normalized brightness value.
Further, the processor 1001 may call the optimal chrominance and luminance determination program stored in the memory 1005, and also perform the following operations:
respectively obtaining the normalized brightness values of RGB three channels in the white picture of the LCD display module through the following formulas according to the current chromaticity and the actual chromaticity,
wherein, LR is an R channel normalized luminance value in a white picture of the LCD display module, LG is a G channel normalized luminance value in a white picture of the LCD display module, LB is a B channel normalized luminance value in a white picture of the LCD display module, (x, y) is a current chromaticity, (xR, yR) is an actual chromaticity of the R channel of the LCD display module at a preset gray scale, (xG, yG) is an actual chromaticity of the G channel of the LCD display module at a preset gray scale, and (xB, yB) is an actual chromaticity of the B channel of the LCD display module at a preset gray scale.
Further, the processor 1001 may call the optimal chrominance and luminance determination program stored in the memory 1005, and also perform the following operations:
respectively determining the theoretical brightness of RGB three channels in the white picture of the LCD module by the following formula according to the current brightness and the normalized brightness value,
lu is the current brightness, LuR is the theoretical brightness of the R channel of the LCD module in the white picture, LuG is the theoretical brightness of the G channel of the LCD module in the white picture, and LuB is the theoretical brightness of the B channel of the LCD module in the white picture.
Further, the processor 1001 may call the optimal chrominance and luminance determination program stored in the memory 1005, and also perform the following operations:
comparing the theoretical brightness with the actual brightness;
when the comparison result meets the following formula, judging that the theoretical brightness does not exceed the actual brightness;
the LRMax is the actual brightness of the R channel of the LCD display module under the preset gray scale, the LGMax is the actual brightness of the G channel of the LCD display module under the preset gray scale, and the LBMax is the actual brightness of the B channel of the LCD display module under the preset gray scale.
Further, the processor 1001 may call the optimal chrominance and luminance determination program stored in the memory 1005, and also perform the following operations:
acquiring a designated chromaticity range and a designated brightness range, and determining a preset chromaticity step length according to the designated chromaticity range;
and performing discrete sampling on the designated chromaticity range according to the preset chromaticity step length to obtain a plurality of chromaticities to be detected, and selecting a plurality of luminances to be detected from the designated luminance range.
Further, the processor 1001 may call the optimal chrominance and luminance determination program stored in the memory 1005, and also perform the following operations:
and acquiring a preset brightness step length, splitting the appointed brightness range according to the preset brightness step length, and acquiring a plurality of to-be-detected brightnesses.
Further, the processor 1001 may call the optimal chrominance and luminance determination program stored in the memory 1005, and also perform the following operations:
and adding the current chroma and the target brightness corresponding to the current chroma into a mapping relation.
Further, the processor 1001 may call the optimal chrominance and luminance determination program stored in the memory 1005, and also perform the following operations:
after traversing the chromaticity to be detected, taking the target brightness with the maximum brightness as the optimal brightness;
and searching the target chromaticity corresponding to the optimal brightness in the mapping relation, and taking the searched target chromaticity as the optimal chromaticity.
The optimal chromaticity and brightness determining device of the embodiment can adjust the LCD display module to the optimal chromaticity and brightness as far as possible for a customer on the basis of the specification parameters (namely, the specified chromaticity range and the specified brightness range) of the display screen specified by the customer, so that the burnt LCD display module has a better display effect while meeting the customer requirements, and the market competitiveness of the LCD display module leaving the factory is improved.
Based on the hardware structure, the embodiment of the method for determining the optimal chromaticity and brightness is provided.
Referring to fig. 2, fig. 2 is a flowchart illustrating a first embodiment of a method for determining optimal chrominance and luminance according to the present invention.
In this embodiment, the method for determining the optimal chromaticity and luminance includes the following steps:
step S10: when the LCD display module is lightened, the RGB tee joint of the LCD display module under the preset gray scale is obtained
The actual chrominance and actual luminance of the track;
it should be noted that the main body of the method of the present embodiment may be the above-mentioned optimal chromaticity and luminance determining device, and of course, other devices or apparatuses with similar functions may also be used, and the present embodiment is not limited to this.
It can be understood that before the LCD display screen module is burned, the LCD display module needs to be powered on to light the LCD display module, and then the actual chromaticity and the actual brightness of the RGB three channels of the LCD display module under the 255 gray scale (i.e. the preset gray scale) preset picture are respectively measured.
It should be understood that, in this embodiment and the following embodiments, the actual chromaticity and the actual brightness of the Red (Red, R) channel in the preset picture are the actual chromaticity and the actual brightness of the LCD display module in the pure Red picture, the actual chromaticity and the actual brightness of the Green (Green, G) channel in the preset picture are the actual chromaticity and the actual brightness of the LCD display module in the pure Green picture, and correspondingly, the actual chromaticity and the actual brightness of the Blue (Blue, B) channel in the preset picture are the actual chromaticity and the actual brightness of the LCD display module in the pure Blue picture.
Step S20: acquiring a designated chromaticity range and a designated brightness range, selecting a plurality of chromaticities to be tested from the designated chromaticity range, and selecting a plurality of brightnesses to be tested from the designated brightness range;
it should be noted that the specified chromaticity range and the specified brightness range may be display (burn) specification parameters given by an LCD display screen ordering provider (customer), such as: the chroma range given by the client is x1 (0.300-0.305), y1 (0.315-0.325), and the luminance range is Lu1 (420 cd/m2), and usually, when the client does not specify the luminance upper limit, 500cd/m2 is generally used as the luminance upper limit, namely, the luminance range Lu1[ 420-500 cd/m2 ]. Of course, the designated chromaticity range and the designated luminance range in the present embodiment can be set according to actual situations, and are not limited thereto.
It is understood that the chromaticity to be measured may be a chromaticity sample obtained by discretely sampling the designated chromaticity range, such as a chromaticity sample (x2, y2), and the value of each chromaticity sample is determined, for example: x2 is 0.300, y2 is 0.315; correspondingly, the brightness to be measured may be a brightness value to be measured determined by a plurality of values obtained by splitting the specified brightness range according to a preset rule, for example: (500cd/m2, 499cd/m2, … … 420cd/m 2). Of course, the specific acquisition of the chroma samples and the splitting of the designated luminance range may be determined according to actual requirements, which is not limited in this embodiment.
In a specific implementation, after a chromaticity range and a brightness range specified by a client are obtained, a plurality of chromaticities to be detected can be obtained by performing discrete sampling on the specified chromaticity range; and splitting the specified brightness range to obtain a plurality of to-be-detected brightnesses.
Step S30: traversing the chromaticity to be detected, and taking the traversed chromaticity to be detected as the current chromaticity;
after a plurality of chromaticities to be detected are obtained, the chromaticities to be detected can be traversed randomly or according to a preset sequence, and the currently traversed chromaticities to be detected are used as current chromaticities.
Step S40: selecting one of the to-be-detected brightnesses as a current brightness;
correspondingly, after the split plurality of luminances to be measured are obtained, one of the luminances to be measured can be selected randomly or according to a certain rule as the current luminance.
Step S50: determining theoretical brightness of RGB three channels in a white picture of the LCD display module according to the current chromaticity, the current brightness and the actual chromaticity;
it should be noted that, in this embodiment, the theoretical brightness of the RGB three channels in the white picture of the LCD display module includes: and the LCD display module group white picture respectively corresponds to the brightness values of the red channel, the green channel and the blue channel, namely the theoretical brightness.
In a specific implementation, after the current chromaticity and the current brightness are determined, the theoretical brightness of a red channel, the theoretical brightness of a green channel and the theoretical brightness of a blue channel in a white picture of the LCD display module can be respectively calculated through the pre-obtained actual chromaticity.
Step S60: when the theoretical brightness does not exceed the actual brightness, judging the current brightness to be effective brightness, returning to the step of selecting one from the to-be-detected brightness as the current brightness, and taking the effective brightness with the maximum brightness as the target brightness corresponding to the current chromaticity after all the to-be-detected brightnesses are selected;
considering the luminance loss, the theoretical luminance obtained by actual calculation may be lower than the luminance value obtained by actual measurement. Therefore, when the theoretical brightness is found to be higher than the actual brightness obtained by actual measurement, it indicates that the current brightness cannot be realized on the current LCD display module, that is, the current brightness is an invalid brightness; on the contrary, if the theoretical brightness is found to be lower than the actual brightness obtained by actual measurement, the current brightness is indicated as effective brightness.
Under the condition that the current chromaticity is not changed, continuously selecting one of the remaining luminance to be measured as a (new) current luminance, and then calculating the theoretical luminance of RGB three channels in the white picture of the LCD display module under the (new) current luminance according to the step S50, thereby detecting whether the (new) current luminance is an effective luminance; and circularly executing the operation until all the brightness to be measured is selected, and screening out the effective brightness with the maximum brightness from the obtained effective brightness to serve as the target brightness corresponding to the current chromaticity.
Step S70: and after traversing the chromaticity to be detected, taking the target brightness with the maximum brightness as the optimal brightness, and taking the chromaticity corresponding to the optimal brightness as the optimal chromaticity.
After the target brightness corresponding to the current chromaticity is determined, continuously traversing the rest chromaticities to be detected, determining the target brightness corresponding to each chromaticity to be detected, and screening out the maximum brightness value from the obtained target brightness to serve as the optimal brightness; after the optimal brightness is determined, the chroma corresponding to the optimal brightness can be found out, and then the found chroma is used as the optimal chroma. And determining the optimal chromaticity and the optimal brightness when the LCD display module is subsequently burned according to the chromaticity range and the brightness range specified by the customer. Of course, after the optimal chromaticity and the optimal brightness are obtained, the 3Gamma programming can be performed on the LCD display module to be programmed according to the optimal chromaticity and the optimal brightness.
Further, in this embodiment, after the optimal luminance is determined, in order to implement fast and accurate search for the optimal chromaticity, the current chromaticity and the target luminance corresponding to the current chromaticity may be added to a mapping relationship, so that the target chromaticity corresponding to the optimal luminance may be searched in the mapping relationship after the optimal luminance is determined, and the searched target chromaticity is used as the optimal chromaticity, so as to implement fast search for the optimal chromaticity.
In the embodiment, when the LCD display module is lightened, the actual chromaticity and the actual brightness of RGB three channels of the LCD display module under the preset gray scale are obtained; acquiring a designated chromaticity range and a designated brightness range, selecting a plurality of chromaticities to be tested from the designated chromaticity range, and selecting a plurality of brightnesses to be tested from the designated brightness range; traversing the chromaticity to be detected, and taking the traversed chromaticity to be detected as the current chromaticity; selecting one of the to-be-detected brightnesses as a current brightness; determining theoretical brightness of RGB three channels in a white picture of the LCD display module according to the current chromaticity, the current brightness and the actual chromaticity; when the theoretical brightness does not exceed the actual brightness, judging the current brightness to be effective brightness, returning to the step of selecting one from the to-be-detected brightness as the current brightness, and taking the effective brightness with the maximum brightness as the target brightness corresponding to the current chromaticity after all the to-be-detected brightnesses are selected; after traversing the chromaticity to be tested, the target brightness with the maximum brightness is used as the optimal brightness, and the chromaticity corresponding to the optimal brightness is used as the optimal chromaticity, so that the LCD display module can be adjusted to the optimal chromaticity and brightness value for the customer as much as possible on the basis of the specification parameters of the display screen specified by the customer, the burnt LCD display module can meet the customer requirements and has a better display effect, and the market competitiveness of the LCD display module leaving the factory is improved.
Referring to fig. 3, fig. 3 is a flowchart illustrating a method for determining optimal chrominance and luminance according to a second embodiment of the present invention.
Based on the first embodiment, in the bidirectional pairing connection method for wireless devices provided in this embodiment, the step S50 may specifically include:
step S501: respectively acquiring normalized brightness values of RGB three channels in a white picture of the LCD display module according to the current chromaticity and the actual chromaticity;
it can be understood that, under the condition that the current chromaticity is determined, the brightness of three channels of RGB in the white picture of the LCD display module can be calculated according to the actual chromaticity value of the red, green and blue picture of the LCD display module at the 255 gray scale, which is obtained by measurement in advance, and then the brightness value obtained by calculation is normalized by a normalization method to obtain the normalized brightness value.
It should be understood that the normalization method has two forms, one is to change the number into a decimal number between (0-1), and the other is to change a dimensional expression into a dimensionless expression, i.e. the dimensionless expression is transformed into a dimensionless expression and becomes a pure quantity. In this embodiment, for convenience of calculation, the luminance value of any one color channel among the calculated luminances of the RGB three channels in the white picture of the LCD display module may be set to 1, and the luminance values of the remaining color channels are normalized to obtain the normalized luminance values of the RGB three channels in the white picture of the LCD display module.
Step S502: and respectively determining the theoretical brightness of RGB three channels in the white picture of the LCD display module according to the current brightness and the normalized brightness value.
After the normalized brightness values of the RGB three channels in the white picture of the LCD display module are obtained, the proportional relation of the normalized brightness values of the red channel, the green channel and the blue channel can be determined, and under the condition that the current brightness is determined, the theoretical brightness of the RGB three channels in the white picture of the LCD display module can be respectively calculated according to the current brightness and the proportional relation.
Accordingly, in this embodiment, before the step S60, the method further includes:
step S503: and comparing the theoretical brightness with the actual brightness, and judging that the theoretical brightness does not exceed the actual brightness when a comparison result meets a preset condition.
The present embodiment will be described in detail with reference to specific examples.
For example: when the LCD display module is lightened, if the actual chromaticity of the R channel of the LCD display module is (xR, yR), the actual chromaticity of the G channel is (xG, yG) and the actual chromaticity of the B channel is (xB, yB) under the preset gray scale, the actual brightness of the R channel of the LCD display module is LRMax, the actual brightness of the G channel is LGMax and the actual brightness of the B channel is LBMax under the preset gray scale.
Under the condition that the current chromaticity (x, y) is determined, the normalized brightness values of RGB three channels in the white picture of the LCD display module can be respectively obtained through the following formulas according to the actual chromaticity,
wherein LR is the normalized brightness value of R channel in the white picture of LCD display module, LG is the normalized brightness value of G channel in the white picture of LCD display module, and LB is the normalized brightness value of B channel in the white picture of LCD display module.
Then according to the current brightness Lu and the normalized brightness value, respectively determining the theoretical brightness of RGB three channels in the white picture of the LCD display module by the following formula,
lu is the current brightness, LuR is the theoretical brightness of the R channel of the LCD module in the white picture, LuG is the theoretical brightness of the G channel of the LCD module in the white picture, and LuB is the theoretical brightness of the B channel of the LCD module in the white picture.
After theoretical brightness of red, green and blue channels in a white picture of an LCD display module and measured actual brightness of a red picture, a green picture and a blue picture of the LCD display module under a 255 gray scale are obtained, the theoretical brightness and the actual brightness can be compared; when the comparison result meets the following formula (namely the preset condition), judging that the theoretical brightness does not exceed the actual brightness;
the LRMax is the actual brightness of the R channel of the LCD display module under the preset gray scale, the LGMax is the actual brightness of the G channel of the LCD display module under the preset gray scale, and the LBMax is the actual brightness of the B channel of the LCD display module under the preset gray scale.
Further, in order to verify the influence of the optimal chromaticity and the optimal brightness obtained by the optimal chromaticity and brightness determining method provided by the invention on the LCD display screen burning result, the invention provides the experimental data before and after the display screen burning shown in tables 1 and 2:
TABLE 1
In the experimental data shown in table 1, the chromaticity range specified by the customer is x 0.300 to 0.305, y 0.315 to 0.325, and the minimum luminance 420cd/m 2.
Comparing the white picture display effect obtained by burning the display screen by using the existing burning method with the white picture display effect obtained by burning the display screen by using the optimal chromaticity and the optimal brightness obtained by the invention in the table 1, after the chromaticity range and the minimum brightness are appointed by a customer, the brightness of the display screen can only fall near the minimum brightness appointed by the customer after the burning of the display screen by using the existing burning method for the display screen; even in some cases, the condition that the brightness value after burning is larger than the minimum brightness specified by the customer cannot be met. After the optimal chromaticity and the optimal brightness obtained by the optimal chromaticity and brightness determination method are adopted to burn the display screen, the brightness of the burnt display screen can be adjusted to the maximum brightness which can be reached on the premise of ensuring the minimum brightness of a client, the display effect of the burnt display screen is obviously improved, and the market competitiveness is improved.
TABLE 2
In the experimental data shown in table 2, the chromaticity range specified by the customer is chromaticity x 0.300 to 0.305, y 0.315 to 0.325, and minimum luminance 410cd/m 2.
Sample number 2 is taken as an example in conjunction with table 2: before burning, when the white picture display effect of the LCD screen is (0.302, 0.330, 454), the LCD screen is burned in the chromaticity range and the luminance range specified by a client, the white picture display effect burned by the existing burning method is (0.302, 0.317, 411), the luminance value after burning is 411cd/m2 which is basically very close to the lowest luminance 410cd/m2 specified by the client, the white picture display effect after burning the display screen by the optimal chromaticity and the optimal luminance obtained by the method is (0.302, 0.325, 439), the chromaticity (0.302, 0.325) is much higher than the lowest luminance 410cd/m2 specified by the client, and the chromaticity (0.302, 0.325) also falls in the chromaticity range x of 0.300-0.305 and the y is 0.315-0.325.
The experimental data in tables 1 and 2 show that the optimal chromaticity and optimal brightness obtained by the optimal chromaticity and brightness determining method provided by the invention have significant influence on the burning result of the LCD display screen, and the LCD display module can be adjusted to the optimal chromaticity and brightness value as much as possible for a customer on the basis of the specification parameters (chromaticity range and brightness range) of the display screen specified by the customer, so that the burned LCD display module has better display effect while meeting the customer requirements, and the market competitiveness of the LCD display module leaving the factory is improved.
Referring to fig. 4, fig. 4 is a flowchart illustrating a method for determining optimal chrominance and luminance according to a third embodiment of the present invention.
Based on the foregoing embodiments, in the method for determining optimal chromaticity and luminance provided by this embodiment, the step S20 may specifically include:
step S201: acquiring a designated chromaticity range and a designated brightness range, and determining a preset chromaticity step length according to the designated chromaticity range;
after the chromaticity range specified by the customer is obtained, the preset chromaticity step length may be determined according to the chromaticity range specified by the customer, specifically, the corresponding accuracy may be determined according to an upper limit chromaticity value or a lower limit chromaticity value in the chromaticity range, and then the accuracy is used as the preset chromaticity step length, for example: the chroma range specified by the client is x1 (0.300-0.305) and y1 (0.315-0.325), the accuracy corresponding to the upper limit chroma value or the lower limit chroma value in the chroma range is 0.001, and at this time, 0.001 can be used as the preset chroma step.
Step S202: and performing discrete sampling on the designated chromaticity range according to the preset chromaticity step length to obtain a plurality of chromaticities to be detected, and selecting a plurality of luminances to be detected from the designated luminance range.
After the preset chromaticity step length is determined, the designated chromaticity range may be subjected to discrete sampling according to the preset chromaticity step length to obtain a plurality of chromaticities to be measured, for example, for the chromaticity range x1(0.300 to 0.305) and y1(0.315 to 0.325) designated by the customer, the number of chromaticities to be measured (or chromaticity samples) finally obtained by performing discrete sampling according to the preset chromaticity step length is 5 × 10 — 50, that is, the number of chromaticities to be measured finally obtained is 50.
Correspondingly, the selecting a plurality of luminances to be measured from the designated luminance range may specifically include: and acquiring a preset brightness step length, splitting the appointed brightness range according to the preset brightness step length, and acquiring a plurality of to-be-detected brightnesses. The preset luminance step may be a step value determined according to the accuracy corresponding to the upper and lower limit luminance values in the luminance range specified by the client, for example, the luminance range specified by the client is Lu1 (greater than or equal to 420cd/m2), 1cd/m2 may be used as the preset luminance step to split the specified luminance range, for example, the luminance range [ 420-500 cd/m2] may be split into 80 luminances to be measured according to the step size of 1cd/m 2.
In the embodiment, the designated chromaticity range and the designated brightness range are obtained, the preset chromaticity step length is determined according to the designated chromaticity range, the designated chromaticity range is subjected to discrete sampling according to the preset chromaticity step length, a plurality of chromaticities to be detected are obtained, a plurality of luminances to be detected are selected from the designated brightness range, the accuracy of the finally obtained chromaticity can be ensured to meet the customer requirements, and meanwhile, the calculation amount of the follow-up chromaticity to be detected during the throughout process is reduced.
Furthermore, an embodiment of the present invention further provides a computer-readable storage medium, on which an optimal chromaticity and luminance determining program is stored, and when executed by a processor, the optimal chromaticity and luminance determining program implements the following operations:
when the LCD display module is lightened, acquiring the actual chromaticity and the actual brightness of RGB three channels of the LCD display module under a preset gray scale;
acquiring a designated chromaticity range and a designated brightness range, selecting a plurality of chromaticities to be tested from the designated chromaticity range, and selecting a plurality of brightnesses to be tested from the designated brightness range;
traversing the chromaticity to be detected, and taking the traversed chromaticity to be detected as the current chromaticity;
selecting one of the to-be-detected brightnesses as a current brightness;
determining theoretical brightness of RGB three channels in a white picture of the LCD display module according to the current chromaticity, the current brightness and the actual chromaticity;
when the theoretical brightness does not exceed the actual brightness, judging the current brightness to be effective brightness, returning to the step of selecting one from the to-be-detected brightness as the current brightness, and taking the effective brightness with the maximum brightness as the target brightness corresponding to the current chromaticity after all the to-be-detected brightnesses are selected;
and after traversing the chromaticity to be detected, taking the target brightness with the maximum brightness as the optimal brightness, and taking the chromaticity corresponding to the optimal brightness as the optimal chromaticity.
Further, the optimal chrominance and luminance determining program when executed by the processor further performs the following operations:
respectively acquiring normalized brightness values of RGB three channels in a white picture of the LCD display module according to the current chromaticity and the actual chromaticity;
and respectively determining the theoretical brightness of RGB three channels in the white picture of the LCD display module according to the current brightness and the normalized brightness value.
Further, the optimal chrominance and luminance determining program when executed by the processor further performs the following operations:
respectively obtaining the normalized brightness values of RGB three channels in the white picture of the LCD display module through the following formulas according to the current chromaticity and the actual chromaticity,
wherein, LR is an R channel normalized luminance value in a white picture of the LCD display module, LG is a G channel normalized luminance value in a white picture of the LCD display module, LB is a B channel normalized luminance value in a white picture of the LCD display module, (x, y) is a current chromaticity, (xR, yR) is an actual chromaticity of the R channel of the LCD display module at a preset gray scale, (xG, yG) is an actual chromaticity of the G channel of the LCD display module at a preset gray scale, and (xB, yB) is an actual chromaticity of the B channel of the LCD display module at a preset gray scale.
Further, the optimal chrominance and luminance determining program when executed by the processor further performs the following operations:
respectively determining the theoretical brightness of RGB three channels in the white picture of the LCD module by the following formula according to the current brightness and the normalized brightness value,
lu is the current brightness, LuR is the theoretical brightness of the R channel of the LCD module in the white picture, LuG is the theoretical brightness of the G channel of the LCD module in the white picture, and LuB is the theoretical brightness of the B channel of the LCD module in the white picture.
Further, the optimal chrominance and luminance determining program when executed by the processor further performs the following operations:
comparing the theoretical brightness with the actual brightness;
when the comparison result meets the following formula, judging that the theoretical brightness does not exceed the actual brightness;
wherein the content of the first and second substances,
lu is the current brightness, LuR is the theoretical brightness of the R channel of the LCD module in the white picture, LuG is the theoretical brightness of the G channel of the LCD module in the white picture, and LuB is the theoretical brightness of the B channel of the LCD module in the white picture.
Further, the optimal chrominance and luminance determining program when executed by the processor further performs the following operations:
acquiring a designated chromaticity range and a designated brightness range, and determining a preset chromaticity step length according to the designated chromaticity range;
and performing discrete sampling on the designated chromaticity range according to the preset chromaticity step length to obtain a plurality of chromaticities to be detected, and selecting a plurality of luminances to be detected from the designated luminance range.
Further, the optimal chrominance and luminance determining program when executed by the processor further performs the following operations:
and acquiring a preset brightness step length, splitting the appointed brightness range according to the preset brightness step length, and acquiring a plurality of to-be-detected brightnesses.
Further, the optimal chrominance and luminance determining program when executed by the processor further performs the following operations:
and adding the current chroma and the target brightness corresponding to the current chroma into a mapping relation.
Further, the optimal chrominance and luminance determining program when executed by the processor further performs the following operations:
after traversing the chromaticity to be detected, taking the target brightness with the maximum brightness as the optimal brightness;
and searching the target chromaticity corresponding to the optimal brightness in the mapping relation, and taking the searched target chromaticity as the optimal chromaticity.
According to the embodiment, the LCD display module can be adjusted to the best chromaticity and brightness as far as possible for a customer on the basis of the specification parameters (namely, the specified chromaticity range and the specified brightness range) of the display screen specified by the customer, so that the burnt LCD display module has a better display effect while meeting the customer requirements, and the market competitiveness of the LCD display module leaving the factory is improved.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (7)
1. An optimal chrominance and luminance determining method, comprising:
when the LCD display module is lightened, acquiring the actual chromaticity and the actual brightness of RGB three channels of the LCD display module under a preset gray scale;
acquiring a designated chromaticity range and a designated brightness range, selecting a plurality of chromaticities to be tested from the designated chromaticity range, and selecting a plurality of brightnesses to be tested from the designated brightness range;
traversing the chromaticity to be detected, and taking the traversed chromaticity to be detected as the current chromaticity; selecting one of the to-be-detected brightnesses as a current brightness;
determining theoretical brightness of RGB three channels in a white picture of the LCD display module according to the current chromaticity, the current brightness and the actual chromaticity;
when the theoretical brightness does not exceed the actual brightness, judging the current brightness to be effective brightness, returning to the step of selecting one from the to-be-detected brightness as the current brightness, and taking the effective brightness with the maximum brightness as the target brightness corresponding to the current chromaticity after all the to-be-detected brightnesses are selected;
after traversing the chromaticity to be detected, taking the target brightness with the maximum brightness as the optimal brightness, and taking the chromaticity corresponding to the optimal brightness as the optimal chromaticity;
wherein the theoretical brightness is determined by:
respectively obtaining the normalized brightness values of RGB three channels in the white picture of the LCD display module through the following formulas according to the current chromaticity and the actual chromaticity,
wherein, LR is an R channel normalized luminance value in a white picture of the LCD display module, LG is a G channel normalized luminance value in a white picture of the LCD display module, LB is a B channel normalized luminance value in a white picture of the LCD display module, (x, y) is a current chromaticity, (xR, yR) is an actual chromaticity of the R channel of the LCD display module at a preset gray scale, (xG, yG) is an actual chromaticity of the G channel of the LCD display module at a preset gray scale, and (xB, yB) is an actual chromaticity of the B channel of the LCD display module at a preset gray scale;
respectively determining the theoretical brightness of RGB three channels in the white picture of the LCD module by the following formula according to the current brightness and the normalized brightness value,
lu is the current brightness, LuR is the theoretical brightness of the R channel of the LCD module in the white picture, LuG is the theoretical brightness of the G channel of the LCD module in the white picture, and LuB is the theoretical brightness of the B channel of the LCD module in the white picture.
2. The method of determining optimal chroma and luma according to claim 1, wherein before determining the current luma to be an effective luma when the theoretical luma does not exceed the actual luma, the method further comprises:
comparing the theoretical brightness with the actual brightness;
when the comparison result meets the following formula, judging that the theoretical brightness does not exceed the actual brightness;
the LRMax is the actual brightness of the R channel of the LCD display module under the preset gray scale, the LGMax is the actual brightness of the G channel of the LCD display module under the preset gray scale, and the LBMax is the actual brightness of the B channel of the LCD display module under the preset gray scale.
3. The method for determining optimal chromaticity and luminance according to claim 2, wherein the obtaining of the designated chromaticity range and the designated luminance range, the selecting of the plurality of chromaticities to be measured from the designated chromaticity range, and the selecting of the plurality of luminances to be measured from the designated luminance range, specifically comprises:
acquiring a designated chromaticity range and a designated brightness range, and determining a preset chromaticity step length according to the designated chromaticity range;
and performing discrete sampling on the designated chromaticity range according to the preset chromaticity step length to obtain a plurality of chromaticities to be detected, and selecting a plurality of luminances to be detected from the designated luminance range.
4. The method for determining optimal chrominance and luminance according to claim 3, wherein the selecting a plurality of luminances to be measured from the designated luminance range specifically comprises:
and acquiring a preset brightness step length, splitting the appointed brightness range according to the preset brightness step length, and acquiring a plurality of to-be-detected brightnesses.
5. The optimal chrominance and luminance determining method of claim 4, wherein after the effective luminance with the maximum luminance is taken as the target luminance corresponding to the current chrominance, the method further comprises:
adding the current chroma and the target brightness corresponding to the current chroma into a mapping relation;
correspondingly, after the traversal of the chromaticity to be measured is completed, taking the target brightness with the maximum brightness as the optimal brightness, and taking the chromaticity corresponding to the optimal brightness as the optimal chromaticity specifically includes:
after traversing the chromaticity to be detected, taking the target brightness with the maximum brightness as the optimal brightness;
and searching the target chromaticity corresponding to the optimal brightness in the mapping relation, and taking the searched target chromaticity as the optimal chromaticity.
6. An apparatus for determining optimal chrominance and luminance, the apparatus comprising: a memory, a processor and an optimal chrominance and luminance determining program stored on the memory and executable on the processor, the optimal chrominance and luminance determining program being configured to implement the steps of the optimal chrominance and luminance determining method according to any one of claims 1 to 5.
7. A computer-readable storage medium, having stored thereon an optimal chrominance and luminance determining program, which when executed by a processor, implements the steps of the optimal chrominance and luminance determining method of any one of claims 1 to 5.
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Effective date of registration: 20210910 Address after: Building C5, biological city, NO.666, Gaoxin Avenue, Donghu Development Zone, Wuhan City, Hubei Province Patentee after: WUHAN CHINA STAR OPTOELECTRONICS TECHNOLOGY Co.,Ltd. Address before: No.03-01, it service floor, No.1, Guanshan 1st Road, Donghu New Technology Development Zone, Wuhan City, Hubei Province, 430000 Patentee before: WUHAN HUAXIAN PHOTOELECTRIC TECHNOLOGY Co.,Ltd. |