CN115831036A - Display control method and device, display equipment, electronic equipment and storage medium - Google Patents
Display control method and device, display equipment, electronic equipment and storage medium Download PDFInfo
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Abstract
The disclosure provides a display control method and device, a display device, an electronic device and a storage medium. A display control method comprising: determining the brightness value of a light-emitting element corresponding to the gray scale value of each sub-pixel in each pixel point in an image to be displayed according to preset gray scale-brightness relation information, wherein the gray scale-brightness relation information comprises mapping relation information of a plurality of gray scale values and a plurality of brightness values; and determining a driving voltage corresponding to the brightness value of each light-emitting element according to preset brightness-voltage relation information so that the display panel can display the driving voltage based on the driving voltage of each light-emitting element, wherein the brightness-voltage relation information comprises mapping relation information of a plurality of brightness values and a plurality of driving voltages. According to the technical scheme, the Gamma debugging process can be omitted, and the workload is reduced.
Description
Technical Field
The present disclosure relates to the field of display technologies, and in particular, to a display control method and apparatus, a display device, an electronic device, and a storage medium.
Background
The brightness perceived by human eyes is not linearly related to the actual brightness of the display panel. In low brightness environments, the human eye is more sensitive to changes in brightness, and vice versa for high brightness environments. For example, the luminance of the light emitted from the light emitting device is increased by 2 times, but the variation in luminance perceived by human eyes is not 2 times of the original luminance. This characteristic of the human eye is called Gamma (Gamma) characteristic. Due to the non-linear perception of brightness by human eyes, if we need to obtain a uniformly changing brightness perception, the brightness displayed by the display panel needs to be non-uniformly changed to adapt to the Gamma characteristic of human eyes. The non-linear parameter of the brightness and the gray scale degree of the display panel can be called as a Gamma parameter, and a curve drawn according to the Gamma parameter is called as a Gamma curve. The Gamma parameter describes the non-linear relationship between the brightness and the gray scale, i.e. the non-linear relationship between the brightness and the input voltage of the data line. Therefore, if the luminance of the display panel and the input voltage of the data line do not conform to the above-mentioned Gamma curve, gamma correction is required to be performed on the display panel. Specifically, the display device may be gamma-debugged before being shipped from a factory, so as to determine a required driving voltage for each gray-scale value of the display device in each gamma band.
Disclosure of Invention
The disclosure provides a display control method and apparatus, a display device, an electronic device, and a storage medium.
According to a first aspect of the present disclosure, a display control method includes:
determining the brightness value of a light-emitting element corresponding to the gray scale value of each sub-pixel in each pixel point in an image to be displayed according to preset gray scale-brightness relation information, wherein the gray scale-brightness relation information comprises mapping relation information of a plurality of gray scale values and a plurality of brightness values;
and determining a driving voltage corresponding to the brightness value of each light-emitting element according to preset brightness-voltage relation information so that the display panel can display the driving voltage based on the driving voltage of each light-emitting element, wherein the brightness-voltage relation information comprises mapping relation information of a plurality of brightness values and a plurality of driving voltages.
In one embodiment, the gray scale-brightness relationship information comprises a gray scale-brightness relationship, wherein the gray scale-brightness relationship is:
y = a X3+ b X2+ c X + d, where Y is a luminance value, X is a gray scale value, a is a first coefficient, b is a second coefficient, c is a third coefficient, and d is a luminance compensation coefficient.
In one embodiment, the first coefficient, the second coefficient, the third coefficient, and the luminance compensation coefficient are obtained by performing a cubic polynomial function fitting on gray-scale-luminance data of the light emitting element.
In one embodiment, the gray scale-brightness relationship information includes a gray scale-brightness relationship table, in which a plurality of gray scale values and brightness values of the light emitting elements corresponding to the gray scale values are recorded.
In one embodiment, the luminance-voltage relationship information includes a luminance-voltage relationship:
z = m × ln (Y) + n, where Z is a driving voltage, Y is a luminance value, m is a fourth coefficient, and n is a voltage compensation coefficient.
In one embodiment, the fourth coefficient and the voltage compensation coefficient are obtained by fitting a logarithmic function to the luminance-voltage data of the light emitting element.
In one embodiment of the method of manufacturing the optical fiber,
m is greater than-1 and less than 0, and/or n is greater than 1.
In one embodiment, the luminance-voltage relationship information includes a luminance-voltage relationship table in which a plurality of luminance values and driving voltages of the light emitting elements corresponding to the respective luminance values are recorded.
In one embodiment, the light emitting element comprises a light emitting diode.
According to a second aspect of the present disclosure, there is provided a display control apparatus comprising:
the brightness determining module is used for determining the brightness value of the light-emitting element corresponding to the gray scale value of each sub-pixel in each pixel point in the image to be displayed according to preset gray scale-brightness relation information, wherein the gray scale-brightness relation information comprises mapping relation information of a plurality of gray scale values and a plurality of brightness values;
and the voltage determining module is used for determining the driving voltage corresponding to the brightness value of each light-emitting element according to preset brightness-voltage relation information so that the display panel can display the driving voltage based on each light-emitting element, wherein the brightness-voltage relation information comprises mapping relation information of a plurality of brightness values and a plurality of driving voltages.
According to a third aspect of the present disclosure, there is provided a display device including the display control apparatus in the embodiment of the present disclosure, and further including a display panel.
According to a fourth aspect of the present disclosure, there is provided an electronic device comprising:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores instructions executable by the at least one processor to cause the at least one processor to perform the method of any one of the present disclosure.
According to a fifth aspect of the present disclosure, there is provided a non-transitory computer readable storage medium having stored thereon computer instructions for causing a computer to perform the method of any one of the present disclosure.
According to the technical scheme, gamma debugging of the product is not needed any more, the complicated and complicated Gamma debugging process is avoided, the workload is reduced, and the product development speed is increased.
It should be understood that the statements in this section do not necessarily identify key or critical features of the embodiments of the present disclosure, nor do they limit the scope of the present disclosure. Other features of the present disclosure will become apparent from the following description.
Drawings
The drawings are included to provide a better understanding of the present solution and are not to be construed as limiting the present disclosure. Wherein:
FIG. 1 is a diagram illustrating a display control method according to an embodiment of the present disclosure;
FIG. 2 illustrates gray scale-luminance curves of a red LED, a green LED, and a blue LED obtained by fitting in one embodiment;
FIG. 3A shows luminance versus voltage data and a relationship curve for a red LED in one embodiment;
FIG. 3B shows luminance versus voltage data and a relationship for a green LED in one embodiment;
FIG. 3C shows luminance versus voltage data and a relationship curve for a blue LED in one embodiment;
FIG. 4 is a block diagram of a display control apparatus according to an embodiment of the present disclosure;
FIG. 5 is a schematic diagram illustrating a process for determining the LED driving voltage according to an embodiment of the present disclosure;
FIG. 6A is a schematic diagram illustrating a process for determining a driving voltage of a red LED according to an embodiment of the present disclosure;
FIG. 6B is a schematic diagram illustrating a process for determining a driving voltage of a green LED according to an embodiment of the present disclosure;
fig. 6C is a schematic diagram of a process for determining the driving voltage of the blue LED according to an embodiment of the disclosure.
Detailed Description
Exemplary embodiments of the present disclosure are described below with reference to the accompanying drawings, in which various details of the embodiments of the disclosure are included to assist understanding, and which are to be considered as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the present disclosure. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.
The display panel includes a plurality of Light Emitting Diodes (LEDs), and three Light Emitting Diodes (LEDs) of different light emitting colors constitute one pixel point. Due to the reasons of materials, manufacturing processes, production batches and the like, the photoelectric properties of each Light Emitting Diode (LED) inevitably have differences, mainly expressed in that the Light Emitting Diodes (LEDs) with different light emitting colors have large differences in light emitting brightness under the same current. Therefore, the display panel product including the LED requires tedious and complicated Gamma debugging, which prolongs the product development cycle.
Fig. 1 is a schematic diagram of a display control method according to an embodiment of the disclosure. The embodiment of the disclosure provides a display control method, which includes steps S11 to S12.
In step S11, according to preset gray scale-brightness relationship information, determining a brightness value of the light emitting element corresponding to a gray scale value of each sub-pixel in each pixel point in the image to be displayed, where the gray scale-brightness relationship information includes mapping relationship information between a plurality of gray scale values and a plurality of brightness values.
In step S12, a driving voltage corresponding to the luminance value of each light emitting element is determined according to preset luminance-voltage relationship information, so that the display panel performs display based on the driving voltage of each light emitting element, where the luminance-voltage relationship information includes mapping relationship information between a plurality of luminance values and a plurality of driving voltages.
It is understood that the pixel point in the image to be displayed may include a plurality of sub-pixels, for example, the pixel point includes three sub-pixels of R, G, and B. The three sub-pixels R, G and B correspond to the three light-emitting elements R, G and B respectively.
The gray scale-brightness relationship information includes a plurality of gray scale values and a plurality of brightness values, and each gray scale value and each brightness value have a mapping relationship. For a light emitting element of a characteristic color, one gray level value corresponds to one luminance value. The gray scale of a pixel in a displayed image can be represented by the brightness of the light-emitting elements, for example, the pixel can include three light-emitting elements of R, G, and B, and the gray scale of the pixel can be represented by the brightness of the light-emitting elements of R, G, and B.
The luminance-voltage relationship information includes a plurality of luminance values and a plurality of driving voltages, each of the luminance values having a mapping relationship with each of the driving voltages, and one luminance value corresponds to one driving voltage for the light emitting elements of the characteristic color. By driving the light emitting elements with corresponding driving voltages, the light emitting elements can be made to produce corresponding luminance.
The display control method disclosed by the invention determines the brightness value of the light-emitting element corresponding to the gray scale value of each sub-pixel in each pixel point in an image to be displayed according to the preset gray scale-brightness relation information; and determining the driving voltage corresponding to the brightness value of each light-emitting element according to the preset brightness-voltage relation information, so that when the driving voltage is adopted to drive the corresponding light-emitting elements in the display panel to emit light, the light-emitting elements can generate corresponding brightness values, the brightness values of the sub-pixels can be combined into corresponding pixel points in the display image, and further, the display panel can display the display image.
By adopting the display control method, the brightness displayed by the display panel accords with the visual perception of human eyes, and Gamma debugging on the product is not needed any more, thus avoiding the complicated Gamma debugging process, reducing the workload and improving the product development speed. Moreover, the technical scheme of the embodiment of the disclosure can be compatible with more different processes and different packages, thereby improving the compatibility of the display product and accelerating the response speed of product development.
Illustratively, the Light Emitting element may include an inorganic Light Emitting Diode (LED), and particularly, may be a sub-millimeter Light Emitting Diode (Mini LED), or may be a Micro Light Emitting Diode (Micro LED).
Illustratively, the LEDs may include red LEDs. The preset gray scale-brightness relationship information may include gray scale-brightness relationship information of the red LED. The preset luminance-voltage relationship information may include luminance-voltage relationship information of the red LED. For the red LED, the brightness value of the red LED can be determined according to the gray scale-brightness relation information of the red LED; and determining the driving voltage corresponding to the brightness value of the red LED according to the brightness-voltage relation information of the red LED.
Illustratively, the LEDs may include green LEDs. The preset gray scale-luminance relationship information may include gray scale-luminance relationship information of the green LED. The preset luminance-voltage relationship information may include luminance-voltage relationship information of the green LED. For the green LED, the brightness value of the green LED can be determined according to the gray scale-brightness relation information of the green LED; and determining the driving voltage corresponding to the brightness value of the green LED according to the brightness-voltage relation information of the green LED.
Illustratively, the LEDs may include blue LEDs. The preset gray scale-luminance relationship information may include gray scale-luminance relationship information of the blue LED. The preset luminance-voltage relationship information may include luminance-voltage relationship information of the blue LED. For the blue LED, the brightness value of the blue LED can be determined according to the gray scale-brightness relation information of the blue LED; and determining the driving voltage corresponding to the brightness value of the blue LED according to the brightness-voltage relation information of the blue LED.
For example, the gray scale-luminance relationship information may be obtained from gray scale-luminance data of the light emitting element, obtained from a light emitting element provider, or obtained by testing or calculating the light emitting element. For example, the luminance-voltage relationship information may be obtained from luminance-voltage data of the light emitting elements, and the light emitting elements may be tested to obtain the luminance-voltage data of the light emitting elements. Therefore, when the driving voltage determined by the technical scheme of the disclosure is used for driving the light-emitting element, the brightness of the light-emitting element can embody the gray scale of the corresponding pixel point in the display image, so that the image displayed by the display panel accords with the visual perception of human eyes, and Gamma debugging of the display device is not needed any more.
The gray-level luminance data of the light emitting element can be obtained by calculation, and the luminance value of the light emitting element corresponding to each gray level of the light emitting elements in the gray levels of 0 to 255 can be obtained, so that the gray-level luminance data of the light emitting element can be obtained. For example, the brightness values of R, G, and B corresponding to gray scales of 0 to 255 of the white screen can be calculated by using a Gamma formula.
Due to differences in manufacturing processes, packaging, performance, and the like, the light-emitting elements of different colors have different brightness at the same current, and therefore, gray-scale and brightness data of the light-emitting elements of the respective colors need to be obtained. In obtaining the luminance-voltage data of the characteristic color light emitting elements by the test method, the light emitting elements may be disposed on a test board, and the luminance-voltage data of the light emitting elements may be obtained by applying a driving voltage to the light emitting elements stepwise and recording the driving voltage corresponding to a specific luminance.
The gray scale-brightness data of the light emitting device includes each gray scale of the light emitting device and the brightness value corresponding to each gray scale. The number of gray levels may be 0 to 255. The gray scale-brightness relation of the light-emitting element can be obtained by fitting the gray scale-brightness data of the light-emitting element in a fitting manner. For example, fitting the gray scale-brightness data of the light emitting element by using a cubic polynomial function may be performed, and the obtained gray scale-brightness relation of the light emitting element may be expressed as:
Y＝a*X 3 +b*X 2 + c × X + d, where X is a gray level value of the light emitting element of the specific color, Y is a luminance value that the light emitting element of the specific color needs to present at the corresponding gray level value, a is a first coefficient, b is a second coefficient, c is a third coefficient, and d is a luminance compensation coefficient.
In one embodiment, the preset gray scale-brightness relationship information may include a gray scale-brightness relationship.
The determined gray scale-brightness relational expression of the light-emitting element can be obtained by performing cubic polynomial function fitting on the gray scale-brightness data of the light-emitting element, and a first coefficient a, a second coefficient b, a third coefficient c and a brightness compensation coefficient d in the gray scale-brightness relational expression are determined.
Illustratively, the first coefficient a may be greater than 0 and less than 1. The second coefficient b may be greater than 0 and less than 1. The third coefficient c may be less than 0. The luminance compensation coefficient d may be greater than 0.
Fig. 2 shows gray scale-luminance curves of the red LED, the green LED, and the blue LED obtained by fitting, respectively, in one embodiment, where the abscissa is gray scale, the ordinate is luminance, and the unit of luminance is nit (nit). The red LED is R-LED, the green LED is G-LED, and the blue LED is B-LED. The gray scale-brightness data adopted in fig. 2 are brightness values corresponding to the R, G, B three-color LEDs at gray scales of 0-255 under the specification of gamma2.2, maximum gray scale of 255, and maximum brightness of 1000nit for a standard white frame. For example, when the white frame has a 150 gray scale, the luminance values of the G-LED, the R-LED and the B-LED at the 150 gray scale can be determined by the curves (1), (2) and (3) in FIG. 2, respectively.
In addition, under the condition that gamma2.2 and the maximum gray scale is 255, the brightness required to be presented by each of the red LED, the green LED, and the blue LED for presenting the specific color picture can be obtained according to the gray scale values of each of the red LED, the green LED, and the blue LED according to the curves (1), (2), and (3) in fig. 2. For example, when the gray scales of the G-LED, the R-LED and the B-LED are 200, 150 and 120, respectively, the brightness value of the G-LED at the gray scale of 200, the brightness value of the R-LED at the gray scale of 150 and the brightness value of the B-LED at the gray scale of 120 can be obtained according to FIG. 2.
In FIG. 2, the goodness of fit R of each curve 2 The values are all above 0.9. R is 2 Refers to goodness of fit, is the calculation of the accuracy of the degree of fit of the regression curve to the observed value, R 2 The maximum value is 1, and the closer to 1, the better the regression curve fits to the observed value.
For example, a data fitting may be performed on the gray scale-luminance data of the light emitting element of a specific color by using a cubic polynomial function to obtain a gray scale-luminance relation of the light emitting element of a specific color.
In the obtained gray scale-brightness relation of the red LED, a =6 × 10 -6 B =0.008, c = -0.1121, d = -1.0176, and thus, in fig. 2, the gray scale-luminance relationship of the red LED is:
Y R ＝(6*10 -6 )*X R 3 +0.008*X R 2 -0.1121*X R +1.0176。
curve (2) in fig. 2 is plotted according to the gray scale-luminance relationship of the red LED.
In the obtained gray scale-luminance relationship of the green LED, a =3 × 10 -6 ，b＝0.0034, c = -0.0475, d = -0.4312, and therefore, in fig. 2, the gray scale-luminance relationship of the green LED is:
Y G ＝(3*10 -6 )*X G 3 +0.0034*X G 2 -0.0475*X G +0.4312。
curve (1) in fig. 2 is plotted according to the gray scale-luminance relationship of the green LED.
In the obtained gray scale-luminance relation of the blue LED, a =2 × 10 -6 B =0.0022, c = -0.0304, d = -0.276, and thus, in fig. 2, the gray scale-luminance relationship of the blue LED is:
Y B ＝(2*10 -6 )*X B 3 +0.0022*X B 2 -0.0304*X B +0.276。
curve (3) in fig. 2 is plotted according to the gray scale-luminance relationship of the blue LED.
It should be noted that in other embodiments, other types of functions may be used to fit the gray scale-luminance data of the light emitting elements of a particular color, for example, a fourth order polynomial function or exponential function may be used to fit the gray scale-luminance data, so long as the goodness of fit R 2 The value may be 0.9 or more.
In one embodiment, the gray scale-brightness relationship information may include a plurality of gray scale values and brightness values of the light emitting elements corresponding to the respective gray scale values.
For example, the gray scale-luminance relationship information may include a gray scale-luminance relationship table. The gray scale-luminance relationship table may have gray scale-luminance data recorded therein, and the gray scale-luminance relationship table may have a plurality of gray scale values and luminance values of the light emitting elements corresponding to the respective gray scale values recorded therein.
For example, determining the luminance value of the color light emitting element corresponding to the gray scale value of each sub-pixel in each pixel point in the image to be displayed according to the preset gray scale-luminance relationship information may include: and determining the brightness value of the color light-emitting element corresponding to the gray scale value of each sub-pixel in each pixel point in the image to be displayed by referring to the gray scale-brightness relation table. Therefore, according to the gray scale value of each sub-pixel in each pixel point in the image to be displayed, the brightness value of the corresponding color light-emitting element can be determined by looking up the gray scale-brightness relation table.
The luminance-voltage data of the light-emitting elements includes luminance values of the light-emitting elements and voltage values corresponding to the luminance values. The luminance-voltage relation of the light-emitting element can be obtained by fitting the luminance-voltage data of the light-emitting element in a fitting manner. Illustratively, the luminance-voltage data of the light emitting element may be fitted using a logarithmic function, and the resultant luminance-voltage relationship of the light emitting element may be expressed as:
z = m × ln (Y) + n, where Y is a luminance value of the specific color light emitting element, Z is a driving voltage required for the specific color light emitting element to emit corresponding luminance, m is a fourth coefficient, and n is a voltage compensation coefficient. In addition, ln is a natural logarithm.
In one embodiment, the preset luminance-voltage relationship information may include a luminance-voltage relationship.
By fitting the luminance-voltage data of the light emitting element, a determined luminance-voltage relational expression of the light emitting element can be obtained, and a fourth coefficient m and a voltage compensation coefficient n in the luminance-voltage relational expression are determined.
Illustratively, the fourth coefficient m may be greater than-1 and less than 0. The voltage compensation factor n may be greater than 1.
For example, the luminance-voltage data of the characteristic color light emitting element may be fitted using a logarithmic function to obtain a luminance-voltage relation of the characteristic color light emitting element.
FIG. 3A shows luminance versus voltage data and a graph of the luminance versus voltage for a red LED in one embodiment, where the abscissa is luminance in nit and the ordinate is voltage in V. Each discrete point is the luminance-voltage data obtained for the actual measurement of the red LED. And fitting the measured brightness-voltage data of the red LED to obtain a brightness-voltage relation of the red LED, wherein m = -0.442 and n = -4.234. Therefore, after fitting the brightness-voltage data of the red LED, the obtained brightness-voltage relation of the red LED is:
Z R ＝-0.442*ln(Y R )+4.234
FIG. 3A shows a curve plotted according to the fitting relation, the goodness of fit R 2 ＝0.9664。
FIG. 3B shows luminance versus voltage data and a graph of green LEDs in one embodiment, where the abscissa is luminance in nit and the ordinate is voltage in V. The luminance-voltage data is data obtained by actually measuring the green LEDs. And fitting the brightness-voltage data of the green LED to obtain a brightness-voltage relation of the green LED, wherein m = -0.172, and n = -5.0285. Therefore, after fitting the brightness-voltage data of the green LED, the obtained brightness-voltage relation of the green LED is:
Z G ＝-0.172*ln(Y G )+5.0285
FIG. 3B shows a curve plotted according to the fitting relation, the goodness of fit R 2 ＝0.9374。
FIG. 3C shows luminance versus voltage data and a graph of the blue LED in one embodiment, where the abscissa is luminance in nit and the ordinate is voltage in V. The luminance-voltage data is data obtained by actually measuring the blue LED. And fitting the brightness-voltage data of the blue LED to obtain a brightness-voltage relation of the blue LED, wherein m = -0.237 and n = -4.7682. Therefore, after fitting the luminance-voltage data of the blue LED, the luminance-voltage relation of the blue LED is obtained as follows:
Z B ＝-0.237*ln(Y B )+4.7682
FIG. 3C shows a curve plotted according to the fitting relation, the goodness of fit R 2 ＝0.9609。
It should be noted that, in other embodiments, the luminance-voltage data of the light-emitting elements with specific colors can be fitted by using other types of function forms, for example, the luminance-voltage data can be fitted by using other base logarithmic functions or exponential functions, etc., as long as the goodness of fit R 2 The value may be 0.9 or more.
In one embodiment, the luminance-voltage relationship information may include a plurality of luminance values, and driving voltages of the light emitting elements corresponding to the respective luminance values.
Illustratively, the luminance-voltage relationship information includes a luminance-voltage relationship table in which a plurality of luminance values and driving voltages of the light emitting elements corresponding to the respective luminance values are recorded.
For example, determining the driving voltage corresponding to the brightness value of each light emitting element according to the preset brightness-voltage relationship information may include: and determining the driving voltage corresponding to the brightness value of the light-emitting element through the brightness-voltage relation table. Therefore, when the driving voltage is used for driving the light-emitting element to emit light, the brightness of the light generated by the light-emitting element can correspond to the gray-scale value of each pixel point in the image to be displayed.
Fig. 4 is a block diagram of a display control apparatus according to an embodiment of the present disclosure. In one embodiment, the display control apparatus may include a brightness determination module 41 and a voltage determination module 42.
The brightness determining module 41 is configured to determine, according to preset gray scale-brightness relationship information, a brightness value of a light emitting element corresponding to a gray scale value of each sub-pixel in each pixel point in an image to be displayed, where the gray scale-brightness relationship information includes mapping relationship information between a plurality of gray scale values and a plurality of brightness values.
The voltage determining module 42 is configured to determine, according to preset luminance-voltage relationship information, a driving voltage corresponding to a luminance value of each light emitting element, so that the display panel performs display based on the driving voltage of each light emitting element, where the luminance-voltage relationship information includes mapping relationship information between a plurality of luminance values and a plurality of driving voltages.
For example, after obtaining the gray scale-brightness relationship information according to the fitting method, the gray scale-brightness relationship information may be stored in the brightness determination module 41. For example, a gray scale-brightness relation may be stored in the brightness determination module 41. The input of the brightness determination module 41 is a gray scale value, and the output is a brightness value.
The gray scale-brightness relation includes multiplication and addition. The multiplication operation can be realized by adopting a multiplier, and the multiplication operation can comprise two kinds, wherein the first kind isMultiplication by indefinite numbers, e.g. X 3 、X 2 Etc.; the second is a multiplication of a fixed number and a non-fixed number, e.g., c X, c being a fixed number. X is a gray scale value, which is an input value of the brightness determination module 41, and can be 0-255, and the gray scale value can be represented by an 8-bit binary number.
The addition operation may be implemented using an adder.
Illustratively, after the luminance-voltage relationship information is obtained according to the fitting method, the luminance-voltage relationship information may be stored in the voltage determination module 42. For example, the luminance-voltage relationship may be stored in the voltage determination module 42. The voltage determination module 42 has an input of a brightness value and an output of a voltage value.
The luminance-voltage relation consists of multiplication, addition and logarithmic functions, wherein multiplication and addition can be realized by a multiplier and an adder, respectively. The logarithm function is difficult to directly display on hardware, so that the logarithm function can be realized by adopting a lookup table mode, that is, the value of the independent variable in the logarithm function and the logarithm value corresponding to the value of the independent variable are all calculated and stored in a module (such as a ROM) capable of realizing storage, and then the logarithm function is read in the ROM according to the input value of the independent variable.
Fig. 5 is a schematic diagram illustrating a process of determining the LED driving voltage according to an embodiment of the disclosure. As shown in fig. 5, the gray-scale value X of each sub-pixel in each pixel point in the image to be displayed is input into the luminance determining module 41, and the luminance determining module 41 determines the luminance value Y of the corresponding LED according to the preset gray-scale-luminance relationship information, such as the gray-scale-luminance relationship formula of the LED; the luminance value Y is input into the voltage determining module 42, and the voltage determining module 42 determines the driving voltage value Z of the corresponding LED according to the preset luminance-voltage relationship information, such as a luminance-voltage relationship. The display panel drives the corresponding LED to display based on the driving voltage value Z.
Fig. 6A is a schematic diagram of a process for determining a driving voltage of a red LED according to an embodiment of the present disclosure. As shown in FIG. 6A, the gray level X of the red sub-pixel in the image to be displayed R The brightness determining module 41 inputs the brightness determining module 41 according to the preset gray scale-brightness relation information of the R-LED, such as the gray of the R-LEDDetermining the brightness value Y of the corresponding R-LED according to the order-brightness relation R (ii) a Brightness value Y R In the input voltage determining module 42, the voltage determining module 42 determines the driving voltage value Z of the corresponding R-LED according to the preset brightness-voltage relation information of the R-LED, such as the brightness-voltage relation of the R-LED R . The display panel is based on the driving voltage value Z R And driving the corresponding R-LED to display.
Fig. 6B is a schematic diagram of a process of determining the driving voltage of the green LED according to an embodiment of the disclosure. As shown in FIG. 6B, the gray level X of the green sub-pixel in the image to be displayed G In the input brightness determining module 41, the brightness determining module 41 determines the brightness value Y of the corresponding G-LED according to the preset gray scale-brightness relation information of the G-LED, such as the gray scale-brightness relation formula of the G-LED G (ii) a Brightness value Y G In the input voltage determining module 42, the voltage determining module 42 determines the driving voltage value Z of the corresponding G-LED according to the preset brightness-voltage relation information of the G-LED, such as the brightness-voltage relation of the G-LED G . Display panel based on driving voltage value Z G And driving the corresponding G-LED to display.
Fig. 6C is a schematic diagram of a process for determining the driving voltage of the blue LED according to an embodiment of the disclosure. As shown in FIG. 6C, the gray level X of the blue sub-pixel in the image to be displayed B In the input brightness determining module 41, the brightness determining module 41 determines the brightness value Y of the corresponding B-LED according to the preset gray scale-brightness relation information of the B-LED, such as the gray scale-brightness relation formula of the B-LED B (ii) a Brightness value Y B In the input voltage determining module 42, the voltage determining module 42 determines the driving voltage value Z corresponding to the B-LED according to the preset brightness-voltage relation information of the B-LED, such as the brightness-voltage relation of the B-LED B . The display panel is based on the driving voltage value Z B And driving the corresponding B-LED to display.
The embodiment of the present disclosure also provides a display device, which may include the display control apparatus in the embodiment of the present disclosure, and may further include a display panel. Illustratively, the display panel may be an LED display panel. The display panel may also be other types of display panels, such as an Organic Light Emitting Diode (OLED) display panel, a quantum dot-organic light emitting diode (QLED) display panel, and the like.
The display device may be: any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like.
According to the display device disclosed by the embodiment of the disclosure, after the light-emitting element is replaced, the brightness-voltage relation information is determined by performing data fitting on the brightness-voltage data obtained through testing and is updated to the voltage determination module, so that the display effect of the display device can meet the visual perception of human eyes, complicated Gamma debugging is not needed, the workload is reduced, and the product development speed is increased.
According to an embodiment of the present disclosure, the present disclosure also provides an electronic device and a readable storage medium.
The electronic device may include: at least one processor; and a memory communicatively coupled to the at least one processor. The memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to execute the display control method in the embodiment of the disclosure.
The readable storage medium may be a non-transitory computer readable storage medium storing computer instructions for causing a computer to execute a display control method in the embodiments of the present disclosure.
Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuitry, field Programmable Gate Arrays (FPGAs), application Specific Integrated Circuits (ASICs), application Specific Standard Products (ASSPs), system on a chip (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs that are executable and/or interpretable on a programmable system including at least one programmable processor, which may be special or general purpose, receiving data and instructions from, and transmitting data and instructions to, a storage system, at least one input device, and at least one output device.
Program code for implementing the methods of the present disclosure may be written in any combination of one or more programming languages. These program codes may be provided to a processor or controller of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the program codes, when executed by the processor or controller, cause the functions/operations specified in the flowchart and/or block diagram to be performed. The program code may execute entirely on the machine, partly on the machine, as a stand-alone software package partly on the machine and partly on a remote machine or entirely on the remote machine or server.
In the context of this disclosure, a machine-readable medium may be a tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. The machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
To provide for interaction with a user, the systems and techniques described here can be implemented on a computer having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and a pointing device (e.g., a mouse or a trackball) by which a user can provide input to the computer. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form, including acoustic, speech, or tactile input.
The systems and techniques described here can be implemented in a computing system that includes a back-end component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such back-end, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), wide Area Networks (WANs), and the Internet.
The computer system may include clients and servers. A client and server are generally remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server may be a cloud server, a server of a distributed system, or a server with a combined blockchain.
It should be understood that various forms of the flows shown above may be used, with steps reordered, added, or deleted. For example, the steps described in the present disclosure may be executed in parallel, sequentially, or in different orders, as long as the desired results of the technical solutions disclosed in the present disclosure can be achieved, and the present disclosure is not limited herein.
The above detailed description should not be construed as limiting the scope of the disclosure. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made in accordance with design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present disclosure should be included in the scope of protection of the present disclosure.
Claims (13)
1. A display control method, comprising:
determining the brightness value of a light-emitting element corresponding to the gray scale value of each sub-pixel in each pixel point in an image to be displayed according to preset gray scale-brightness relation information, wherein the gray scale-brightness relation information comprises mapping relation information of a plurality of gray scale values and a plurality of brightness values;
and determining a driving voltage corresponding to the brightness value of each light-emitting element according to preset brightness-voltage relation information so that a display panel can display the driving voltage based on each light-emitting element, wherein the brightness-voltage relation information comprises mapping relation information of a plurality of brightness values and a plurality of driving voltages.
2. The method of claim 1, wherein the gray scale-luminance relationship information comprises a gray scale-luminance relationship, the gray scale-luminance relationship being:
Y＝a*X 3 +b*X 2 + c × X + d, where X is a gray level value of the light emitting element of the specific color, Y is a luminance value that the light emitting element of the specific color needs to present at the corresponding gray level value, a is a first coefficient, b is a second coefficient, c is a third coefficient, and d is a luminance compensation coefficient.
3. The method according to claim 2, wherein the first coefficient, the second coefficient, the third coefficient, and the luminance compensation coefficient are obtained by performing a cubic polynomial function fitting on gray-scale-luminance data of a light emitting element.
4. The method according to claim 1, wherein the gray scale-brightness relationship information includes a gray scale-brightness relationship table in which a plurality of gray scale values and brightness values of the light emitting elements corresponding to the gray scale values are recorded.
5. The method of claim 1, wherein the luminance-voltage relationship information comprises a luminance-voltage relationship, the luminance-voltage relationship being:
z = m × lnY + n, where Z is a driving voltage, Y is a luminance value, m is a fourth coefficient, and n is a voltage compensation coefficient.
6. The method of claim 5, wherein the fourth coefficient and the voltage compensation coefficient are obtained by fitting a logarithmic function to the luminance-voltage data of the light emitting element.
7. The method of claim 6,
m is greater than-1 and less than 0, and/or n is greater than 1.
8. The method according to claim 5, wherein the luminance-voltage relationship information includes a luminance-voltage relationship table in which a plurality of luminance values and driving voltages of light emitting elements corresponding to the respective luminance values are recorded.
9. The method of claim 1, wherein the light emitting element comprises a light emitting diode.
10. A display control apparatus, characterized by comprising:
the brightness determining module is used for determining the brightness value of the light-emitting element corresponding to the gray scale value of each sub-pixel in each pixel point in the image to be displayed according to preset gray scale-brightness relation information, wherein the gray scale-brightness relation information comprises mapping relation information of a plurality of gray scale values and a plurality of brightness values;
the voltage determining module is configured to determine, according to preset luminance-voltage relationship information, a driving voltage corresponding to a luminance value of each of the light emitting elements, so that a display panel displays the driving voltage based on the driving voltage of each of the light emitting elements, where the luminance-voltage relationship information includes mapping relationship information between a plurality of luminance values and a plurality of driving voltages.
11. A display device comprising the display control apparatus according to claim 10, and further comprising a display panel.
12. An electronic device, comprising:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of any one of claims 1-9.
13. A non-transitory computer readable storage medium having stored thereon computer instructions for causing the computer to perform the method of any one of claims 1-9.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117915510A (en) * | 2024-01-17 | 2024-04-19 | 扬州华彩光电有限公司 | Control system for constant power output of LED lamp |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117915510A (en) * | 2024-01-17 | 2024-04-19 | 扬州华彩光电有限公司 | Control system for constant power output of LED lamp |
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