CN112562604A - Display device and gray scale control method thereof - Google Patents

Display device and gray scale control method thereof Download PDF

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Publication number
CN112562604A
CN112562604A CN202011379696.5A CN202011379696A CN112562604A CN 112562604 A CN112562604 A CN 112562604A CN 202011379696 A CN202011379696 A CN 202011379696A CN 112562604 A CN112562604 A CN 112562604A
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China
Prior art keywords
gray scale
gray
scale data
wavelength
data
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CN202011379696.5A
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Chinese (zh)
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黄北洲
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HKC Co Ltd
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HKC Co Ltd
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Priority to CN202011379696.5A priority Critical patent/CN112562604A/en
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3696—Generation of voltages supplied to electrode drivers
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3685—Details of drivers for data electrodes
    • G09G3/3688—Details of drivers for data electrodes suitable for active matrices only
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0242—Compensation of deficiencies in the appearance of colours

Abstract

The invention relates to a display device which comprises a display part, a driver and a calculator. The driver is connected with the display component, generates each driving signal of each wavelength according to the corrected gray scale data, and drives the gray scale data signal of the display component according to the driving signals. The calculator is connected with the driver, receives the image gray scale data, subtracts the correction value from the gray scale of at least one wavelength in the image gray scale data according to the correction table, generates corrected gray scale data according to the unchanged gray scale of other wavelengths, and transmits the corrected gray scale data to the driver.

Description

Display device and gray scale control method thereof
Technical Field
The present invention relates to a display device and a gray scale control method thereof, and more particularly, to a display device and a gray scale control method thereof, which subtracts a correction value from a gray scale level of at least one wavelength in input image gray scale data according to a correction table, and generates corrected gray scale data and driving signals of the wavelengths thereof according to the subtracted correction value and the unchanged gray scale levels of other wavelengths, so as to drive a gray scale data signal of a display part.
Background
With the increasing development of technology, LCD is not only used as the screen of computer but also widely used in TV screen, projector screen, etc. The liquid crystal display method has many advantages, such as low power consumption and fast response speed, and further, the application field in the future can be expected to be wider.
Currently, the common LCD is active matrix type, which means that each pixel is constructed with a driving circuit element to significantly improve the display characteristics. The active matrix LCD using thin film three-terminal transistors as switching elements is called TFT-type (thin film transistor). And an LCD using TFTs as switching elements is called a TFT liquid crystal display (hereinafter referred to as TFT LCD). To cause the TFTLCD to display a desired image, it is necessary to provide image-forming gray scale data to the LCD and drive the LCD accordingly.
However, since the image gray scale and the obtained light transmittance have slight difference due to color, that is, the correlation between the light transmittance and the applied voltage has color (wavelength) dependency; thus, if no such correction is performed while displaying, the gradation of the color is shifted by a certain color more than when actually half-toning, so that the entire image becomes biased to the color.
Content of application
In view of the above problems in the prior art, an object of the present invention is to provide a display device and a gray scale control method thereof, which are used to solve the problems in the prior art.
In view of the above, the present invention provides a display device including a display unit, a driver, and a calculator. The driver is connected with the display component, generates each driving signal of each wavelength according to the corrected gray scale data, and drives the gray scale data signal of the display component according to the driving signals. The calculator is connected with the driver, receives the image gray scale data, generates correction data of each wavelength according to a correction table, generates corrected gray scale data according to the correction data of each wavelength, and transmits the corrected gray scale data to the driver, wherein the correction data of each wavelength is as follows:
RG1＝G1-R1
RGi＝Gi
wherein RG1Said correction data for at least one wavelength, G1Is the gray level of the at least one wavelength, R1For correction values corresponding to the grey level of said at least one wavelength, RGiFor said correction data of other wavelengths, GiI is an integer greater than 1 for the gray levels of the other wavelengths.
Optionally, the display device may further include an image input terminal, the image input terminal is connected to the calculator, and inputs the image gray-scale data to the calculator.
Alternatively, the calculator may transmit the corrected gray-scale data to the driver according to a timing control signal provided by the timing controller.
Alternatively, the correction table may include several gray scale intervals, and each gray scale interval correspondingly includes the correction value.
Alternatively, the image gray scale data may include a first gray scale level, a second gray scale level, and a third gray scale level.
Based on the above object, the present invention further provides a gray scale control method for a display device, comprising the following steps: inputting image gray scale data to a calculator. And subtracting the correction value from the gray level of at least one wavelength in the image gray-scale data according to the correction table. The gray levels of other wavelengths in the image gray scale data are kept unchanged. Corrected gray-scale data is generated and input to the driver. And generating driving signals of various wavelengths according to the corrected gray scale data, and driving the gray scale data signals of the display component according to the driving signals.
Alternatively, the image gray scale data may be input to the calculator by connecting the calculator to the image input terminal.
Alternatively, the correction table may include several gray scale intervals, and each gray scale interval correspondingly includes the correction value.
Alternatively, the image gray scale data may include a first gray scale level, a second gray scale level, and a third gray scale level.
Based on the above object, the present invention further provides a gray scale control method for a display device, comprising the following steps: inputting image gray scale data to a calculator. And subtracting the correction value from the gray level of at least one wavelength in the image gray-scale data according to the correction table. The gray levels of other wavelengths in the image gray scale data are kept unchanged. The corrected gray scale data is generated and input to the driver according to the timing control signal. And generating driving signals of various wavelengths according to the corrected gray scale data, and driving the gray scale data signals of the display component according to the driving signals.
According to the display device and the gray scale control method thereof, the correction value is subtracted from the gray scale level of at least one wavelength in the input image gray scale data according to the correction table, and the gray scale levels of other wavelengths are not changed, so that the corrected gray scale data and the driving signals of all wavelengths are generated according to the correction value, and the gray scale data signals of the display component are driven, thereby solving the problem that the mutual correlation between the light transmittance and the applied voltage has color (wavelength) dependency.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts:
FIG. 1 is a block diagram of a display device according to the present invention.
FIG. 2 is a flowchart illustrating a gray scale control method of a display device according to an embodiment of the present invention.
FIG. 3 is another flowchart of a gray scale control method of a display device according to an embodiment of the present invention.
FIG. 4 is a flowchart illustrating a gray scale control method of a display device according to another embodiment of the present invention.
FIG. 5 is another flowchart illustrating a gray scale control method of a display device according to another embodiment of the present invention.
FIG. 6 is a flowchart illustrating a gray scale control method of a display device according to another embodiment of the present invention.
FIG. 7 is another flowchart illustrating a gray scale control method of a display device according to another embodiment of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Please refer to fig. 1, which is a block diagram of a display device according to the present invention. As shown, the display device 100 of the present invention includes a display part 110, a driver 120, and a calculator 130.
Among them, the above-mentioned display part may have an optical transmission medium. The driver 120 is connected to the display unit 110, and generates driving signals with different wavelengths according to the corrected gray-scale data, so as to drive the gray-scale data signals of the display unit 110.
The calculator 130 is connected to the driver 120, and receives the image gray-scale data, generates the correction data for each wavelength according to the correction table 140, generates the corrected gray-scale data according to the correction data for each wavelength, and transmits the corrected gray-scale data to the driver, where the correction data for each wavelength is:
RG1＝G1-R1
RGi＝Gi
wherein RG1Said correction data for at least one wavelength, G1Is the gray level of the at least one wavelength, R1For correction values corresponding to the grey level of said at least one wavelength, RGiFor said correction data of other wavelengths, GiI is an integer greater than 1 for the gray levels of the other wavelengths; in other words, the correction value is subtracted from the gray level of at least one wavelength in the image gray-scale data, and the gray levels of other wavelengths are not changed, and then the corrected gray-scale data is generated according to the gray level of the at least one wavelength from which the correction value is subtracted and the gray levels of other wavelengths, and the corrected gray-scale data is transmitted to the driver 120. The image gray-scale data may include a gray-scale level of red R, a gray-scale level of green G, a gray-scale level of blue B, etc., but the image gray-scale data is only an example and is not limited thereto.
For example, the gray level of blue B in the image gray-scale data can be represented by a 64-level gray-scale string. That is, it includes the (B0, B1, B2, B3, B4, B5) character string, and for example, if (B0, B1, B2, B3, B4, B5) ═ 001000, the gradation is "4", and if (B0, B1, B2, B3, B4, B5) ═ 001110, the gradation is "28". Similarly, the gray scale level of red R in the image gray scale data can be represented by the character string of R0 to R5, and the gray scale level of green G can be represented by the character string of G0 to G5.
In the calibration process, the gray scale levels of blue B, red R and green G are provided to the calculator 130, so that the calculator 130 performs subtraction to reduce the gray scale level of at least one color (wavelength) to match the transmittance corresponding to the gray scale level data of each color (wavelength).
Watch 1
Gray scale interval Red R Green G Blue B
0-3 0 0 0
4-10 0 0 -2
11-53 0 0 -4
54-60 0 0 -2
61-63 0 0 0
Please refer to table one, which is the calibration table 140. As shown in the table, the table has correction values for gray scale intervals of each wavelength, wherein a negative number of the correction values represents "minus", and "-2" represents that the gray scale of the color (wavelength) in the gray scale interval should be subtracted by 2, and similarly, if a positive number of the correction values occurs, represents "plus", and if "+ 1" represents that the gray scale of the color (wavelength) in the gray scale interval should be added by 1.
As described above, the gray levels of blue B, red R, and green G are also provided to the correction table 140, and the function of the correction table 140 is to set the actual decrement, and then provide the corresponding decrement to the calculator 130.
Therefore, when the gray scale level of blue is "2", or (B0, B1, B2, B3, B4, B5) ═ 010000, in the correction table 140, the gray scale level 2 belongs to the gray scale level interval of 0 to 3, and the corresponding gray scale correction value of blue B is "0" and is output to the calculator 130 as a decrement. Further, it is understood that the gray level "2" of blue is not required to be corrected, and the gray levels "2" of red R and green G are not required to be corrected and remain unchanged.
On the other hand, when the gray scale level of blue is "20", or (B0, B1, B2, B3, B4, B5) ═ 001010) is inputted, in the correction table 140, the gray scale level 20 belongs to the gray scale level interval of 11 to 53, and the corresponding gray scale correction value of blue B is "-4", that is, minus 4, and is outputted to the calculator 130 as a decrement, so that the gray scale level "20" of blue B is corrected by the calculator 130 to be "16" (20-4 ═ 16), and the gray scale level "20" of red R and green G is maintained without correction.
Furthermore, as shown in fig. 1, the display device of the present invention may further include an image input terminal 150, wherein the image input terminal 150 is connected to the calculator 130 and is used for inputting image gray-scale data to the calculator 130, and the calculator 130 obtains gray-scale levels of at least one wavelength from the image gray-scale data, and decrements the gray-scale levels of the at least one wavelength according to the correction table 140, while the gray-scale levels of other wavelengths remain unchanged.
After the calculator 130 generates the corrected gray scale data according to the corrected gray scale of at least one wavelength and the uncorrected gray scale of other wavelengths, the corrected gray scale data may be transmitted to the driver 120 according to the timing control signal provided by the timing controller 160, so that the driver generates the driving signal of each wavelength according to the corrected gray scale data, and then drives the gray scale data signal of the display part 110 according to the driving signal of each wavelength.
As shown in table 1, the correction table 140 may include several gray scale intervals, such as "0-3", "4-10", "11-53", "54-60", "61-63", etc., where each gray scale interval includes a correction value corresponding to a different wavelength (e.g., red R, green G, blue B, etc.). The negative number of the correction value represents "minus", for example "-2" represents that the gray level of the color (wavelength) in the gray scale interval should be subtracted by 2, and similarly, the positive number of the correction value represents "plus", and for example "+ 1" represents that the gray level of the color (wavelength) in the gray scale interval should be added by 1. The foregoing is illustrative only and is not to be construed as limiting the invention.
Although the concept of the gray scale control method of the display device of the present invention has been described in the process of describing the display device of the present invention, for the sake of clarity, the following flowchart is shown in detail.
Please refer to fig. 2, which is a flowchart illustrating a gray scale control method of a display device according to an embodiment of the present invention. As shown in the figure, the gray scale control method of the display device of the invention comprises the following steps:
in step S21: inputting image gray scale data to a calculator.
In step S22: and subtracting the correction value from the gray level of at least one wavelength in the image gray-scale data according to the correction table.
In step S23: the gray levels of other wavelengths in the image gray scale data are kept unchanged.
In step S24: corrected gray-scale data is generated and input to the driver.
In step S25: and generating driving signals of various wavelengths according to the corrected gray scale data, and driving the gray scale data signals of the display component according to the driving signals.
The image input end is connected with the calculator, so that image gray scale data can be input into the calculator.
In addition, the correction table may include a plurality of gray scale intervals, and each gray scale interval correspondingly includes a correction value. The image gray scale data may include a first gray scale level (e.g., red), a second gray scale level (e.g., green), and a third gray scale level (e.g., blue).
Please refer to fig. 3, which is another flowchart illustrating a gray scale control method of a display device according to an embodiment of the present invention. As shown in the figure, the gray scale control method of the display device of the invention comprises the following steps:
in step S31: inputting image gray scale data to a calculator.
In step S32: and subtracting the correction value from the gray level of at least one wavelength in the image gray-scale data according to the correction table.
In step S33: the gray levels of other wavelengths in the image gray scale data are kept unchanged.
In step S34: the corrected gray scale data is generated and input to the driver according to the timing control signal.
In step S35: and generating driving signals of various wavelengths according to the corrected gray scale data, and driving the gray scale data signals of the display component according to the driving signals.
Referring back to fig. 1, in another embodiment, the display device 100 of the present invention includes a display unit 110, a driver 120 and a calculator 130.
Among them, the above-mentioned display part may have an optical transmission medium. The driver 120 is connected to the display unit 110, and generates driving signals with different wavelengths according to the corrected gray-scale data, so as to drive the gray-scale data signals of the display unit 110.
The calculator 130 is connected to the driver 120, and receives the image gray-scale data, generates the correction data for each wavelength according to the correction table 140, generates the corrected gray-scale data according to the correction data for each wavelength, and transmits the corrected gray-scale data to the driver, where the correction data for each wavelength is:
RG1x＝G1x-R1x
RG1y＝G1y
RGix＝Gix
wherein RG1xSaid correction data for partial gray levels of at least one wavelength, G1xIs a partial gray scale level, R, of the at least one wavelength1xFor correction values of part of the grey scale corresponding to said at least one wavelength, RG1ySaid correction data for other parts of the grey scale of said at least one wavelength, G1yOther part of the grey level, RG, for said at least one wavelengthixSaid correction data for the grey levels of the part of the grey levels of the other wavelengths corresponding to said at least one wavelength, GixI is an integer greater than 1, and is the gray level of the partial gray level of the other wavelength corresponding to the at least one wavelength;
RGiy＝Giy+Riy
wherein RGiySaid correction data for the grey levels of other parts of the grey levels of said other wavelengths corresponding to said at least one wavelength, GiyFor the gray levels of other parts of the gray levels of said other wavelengths corresponding to said at least one wavelength, RiyI is an integer greater than 1 for the correction value of the gray level of the other part of the gray levels corresponding to the at least one wavelength corresponding to the other wavelength. In other words, the correction value is subtracted from the gray level of at least one wavelength in the image gray-scale data, the gray level of other part of at least one wavelength is unchanged, the gray level of the part of the gray level corresponding to the at least one wavelength of other wavelengths is unchanged, but the gray level of the other part of the gray level corresponding to the at least one wavelength of other wavelengths is added with the correction value, and the correction value is corrected according to each wavelengthThe gray scale generates corrected gray scale data and transmits the corrected gray scale data to the driver 120. The image gray-scale data may include a gray-scale level of red R, a gray-scale level of green G, a gray-scale level of blue B, etc., but the image gray-scale data is only an example and is not limited thereto.
Watch two
Gray scale interval Red R Green G Blue B
0-3 0 0 0
4-10 +2 +2 0
11-53 +4 +4 0
54-60 0 0 -2
61-63 0 0 0
Please refer to table two, which is the calibration table 140. As shown in the table, the table has correction values for gray scale intervals of each wavelength, wherein a negative number of the correction values represents "minus", and "-2" represents that the gray scale of the color (wavelength) in the gray scale interval should be subtracted by 2, and similarly, if a positive number of the correction values occurs, represents "plus", and if "+ 1" represents that the gray scale of the color (wavelength) in the gray scale interval should be added by 1.
As described above, the gray levels of blue B, red R, and green G are also provided to the correction table 140, and the function of the correction table 140 is to set the actual addition or subtraction amount, and then provide the corresponding addition or subtraction amount to the calculator 130.
Therefore, when the gray scale level of blue is "4", or (B0, B1, B2, B3, B4, B5) ═ 001000) is inputted, in the correction table 140, the gray scale level "4" belongs to the gray scale level interval of 4 to 10, and the corresponding gray scale correction value of blue B is "0" and outputted to the calculator 130 as decrement. Further, it is understood that the gray level "2" of blue is maintained without correction, and the corresponding gray level "4" of red R and green G is added to the table as "2" when the correction values in the table are both "+ 2", that is, 2 is added, and is output to the calculator 130 as an addition, so that the gray level "4" of red R and green G is corrected to "6" by the calculator 130 (4+2 ═ 6).
On the other hand, when the gray scale level of blue is "20", or (B0, B1, B2, B3, B4, B5) ═ 001010) is inputted, in the correction table 140, the gray scale level 20 belongs to the gray scale level interval of 11 to 53, and the corresponding gray scale correction value of blue B is "-4", that is, minus 4, and is outputted to the calculator 130 as a decrement, so that the gray scale level "20" of blue B is corrected by the calculator 130 to be "16" (20-4 ═ 16), and the gray scale level "20" of red R and green G is maintained without correction.
Furthermore, as shown in fig. 1, the display device of the present invention may further include an image input terminal 150, the image input terminal 150 is connected to the calculator 130 and is used for inputting image gray scale data to the calculator 130, the calculator 130 obtains gray scale levels of at least one wavelength from the image input terminal 150, and then reduces a portion of gray scale levels (e.g. gray scale levels in the gray scale level interval of "54-60" in the second table) of at least one wavelength (e.g. blue B) according to the correction table 140, while other portions of gray scale levels (e.g. gray scale levels in the gray scale level interval of "54-60" in the second table) of at least one wavelength remain unchanged, and other wavelengths (e.g. red R, green G) remain unchanged corresponding to the gray scale levels of the portion of gray scale levels of the at least one wavelength (e.g. gray scale levels in the gray scale level interval of "54-60" in the second table), while the other wavelengths correspond to the gray scale levels of the other portions of gray scale levels of the at least one wavelength " The gray levels in the gray level interval) are then added.
After the calculator 130 generates the corrected gray scale data according to the corrected gray scale of each wavelength, the corrected gray scale data may be transmitted to the driver 120 according to the timing control signal provided by the timing controller 160, so that the driver generates the driving signal of each wavelength according to the corrected gray scale data, and then drives the gray scale data signal of the display unit 110 according to the driving signal of each wavelength. However, the above description is only illustrative, and should not be construed as limiting the present invention.
Although the concept of the gray scale control method of the display device of the present invention has been described in the process of describing the display device of the present invention, for the sake of clarity, the following flowchart is shown in detail.
Please refer to fig. 4, which is a flowchart illustrating a gray scale control method of a display device according to another embodiment of the present invention. As shown in the figure, the gray scale control method of the display device of the invention comprises the following steps:
in step S41: inputting image gray scale data to a calculator.
In step S42: and subtracting the correction value from the part of the gray level of at least one wavelength in the image gray-scale data according to the correction table, and keeping the other part of the gray level of at least one wavelength unchanged.
In step S43: and adding a correction value to the gray levels of other part of gray levels of other wavelengths corresponding to at least one wavelength in the image gray scale data according to the correction table, and keeping the gray levels of the part of gray levels of other wavelengths corresponding to at least one wavelength unchanged.
In step S44: corrected gray-scale data is generated and input to the driver.
In step S45: and generating driving signals of various wavelengths according to the corrected gray scale data, and driving the gray scale data signals of the display component according to the driving signals.
The image input end is connected with the calculator, so that image gray scale data can be input into the calculator.
In addition, the correction table may include a plurality of gray scale intervals, and each gray scale interval correspondingly includes a correction value. The image gray scale data may include a first gray scale level, a second gray scale level and a third gray scale level.
Please refer to fig. 5, which is a flowchart illustrating a gray scale control method of a display device according to another embodiment of the present invention. As shown in the figure, the gray scale control method of the display device of the invention comprises the following steps:
in step S51: inputting image gray scale data to a calculator.
In step S52: and subtracting the correction value from the part of the gray level of at least one wavelength in the image gray-scale data according to the correction table, and keeping the other part of the gray level of at least one wavelength unchanged.
In step S53: and adding a correction value to the gray levels of other part of gray levels of other wavelengths corresponding to at least one wavelength in the image gray scale data according to the correction table, and keeping the gray levels of the part of gray levels of other wavelengths corresponding to at least one wavelength unchanged.
In step S54: the corrected gray scale data is generated and input to the driver according to the timing control signal.
In step S55: and generating driving signals of various wavelengths according to the corrected gray scale data, and driving the gray scale data signals of the display component according to the driving signals.
Referring to fig. 1, in another embodiment, a display device 100 of the present invention includes a display unit 110, a driver 120, and a calculator 130.
Among them, the above-mentioned display part may have an optical transmission medium. The driver 120 is connected to the display unit 110, and generates driving signals with different wavelengths according to the corrected gray-scale data, so as to drive the gray-scale data signals of the display unit 110.
The calculator 130 is connected to the driver 120, and receives the image gray-scale data, generates the correction data for each wavelength according to the correction table 140, generates the corrected gray-scale data according to the correction data for each wavelength, and transmits the corrected gray-scale data to the driver, where the correction data for each wavelength is:
RG1＝G1-R1
wherein RG1Said correction data for at least one wavelength, G1Is the gray level of the at least one wavelength, R1A correction value for the gray level corresponding to the at least one wavelength;
RGi＝Gi+Ri
wherein RGiFor said correction data of other wavelengths, GiIs the gray level of said other wavelength, RiI is an integer greater than 1, which is a correction value corresponding to the gray level of the other wavelength; in other words, the gray scale level of at least one wavelength in the image gray scale data is subtracted by the correction value, and the gray scale levels of other wavelengths are added by the correction value, and then the corrected gray scale data is generated according to the gray scale level corrected by each wavelength, and the corrected gray scale data is transmitted to the driver 120. The image gray-scale data may include a gray-scale level of red R, a gray-scale level of green G, a gray-scale level of blue B, etc., but the image gray-scale data is only an example and is not limited thereto.
Watch III
Gray scale interval Red R Green G Blue B
0-3 0 0 0
4-10 +1 +1 -1
11-53 +2 +2 -2
54-60 +1 +1 -1
61-63 0 0 0
Please refer to table three, which is the calibration table 140. As shown in the table, the table has correction values for gray scale intervals of each wavelength, wherein a negative number of the correction values represents "minus", and "-2" represents that the gray scale of the color (wavelength) in the gray scale interval should be subtracted by 2, and similarly, if a positive number of the correction values occurs, represents "plus", and if "+ 1" represents that the gray scale of the color (wavelength) in the gray scale interval should be added by 1.
As described above, the gray levels of blue B, red R, and green G are also provided to the correction table 140, and the function of the correction table 140 is to set the actual addition or subtraction amount, and then provide the corresponding addition or subtraction amount to the calculator 130.
Therefore, when the gray scale level of blue is "4", or (B0, B1, B2, B3, B4, B5) ═ 001000), in the correction table 140, the gray scale level "4" belongs to the gray scale level interval of 4-10, and the corresponding gray scale correction value of blue B is "-1", i.e., 1 is subtracted, and output to the calculator 130 as a decrement, so that the gray scale level "4" of blue B is corrected by the calculator 130 to be "3" (4-1 ═ 3), and the corresponding gray scale level "4" of red R and green G is both "+ 1", i.e., 1 is added, and output to the calculator 130 as an add, so that the gray scale level "4" of red R and green G is corrected by the calculator 130 to be "5" (4+1 ═ 5).
On the other hand, when the gray scale level of blue is "20", or (B0, B1, B2, B3, B4, B5) ═ 001010) is inputted, in the correction table 140, the gray scale level 20 belongs to the gray scale level interval 11-53, and the corresponding gray scale correction value of blue B is "-2", i.e., minus 2, and is outputted to the calculator 130 as a decrement, so that the gray scale level "20" of blue B is corrected by the calculator 130 to be "18" (20-2 ═ 18), and the corresponding gray scale level "20" of red R and green G is both "+ 2", i.e., plus 2, in the table, and is outputted to the calculator 130 as an increment, so that the gray scale level "20" of red R and green G is corrected by the calculator 130 to be "22" (20+2 ═ 22).
Furthermore, as shown in fig. 1, the display device of the present invention may further include an image input terminal 150, wherein the image input terminal 150 is connected to the calculator 130 and is used for inputting image gray-scale data to the calculator 130, and the calculator 130 obtains gray-scale levels of at least one wavelength from the image gray-scale data, and decrements a portion of gray-scale levels of at least one wavelength (e.g., blue B) according to the correction table 140, while incrementing gray-scale levels of other wavelengths (e.g., red R, green G).
After the calculator 130 generates the corrected gray scale data according to the corrected gray scale of each wavelength, the corrected gray scale data may be transmitted to the driver 120 according to the timing control signal provided by the timing controller 160, so that the driver generates the driving signal of each wavelength according to the corrected gray scale data, and then drives the gray scale data signal of the display unit 110 according to the driving signal of each wavelength. However, the above description is only illustrative, and should not be construed as limiting the present invention.
Although the concept of the gray scale control method of the display device of the present invention has been described in the process of describing the display device of the present invention, for the sake of clarity, the following flowchart is shown in detail.
Please refer to fig. 6, which is a flowchart illustrating a gray scale control method of a display device according to another embodiment of the present invention. As shown in the figure, the gray scale control method of the display device of the invention comprises the following steps:
in step S61: inputting image gray scale data to a calculator.
In step S62: and subtracting the correction value from the gray level of at least one wavelength in the image gray-scale data according to the correction table.
In step S63: and adding correction values to the gray levels of other wavelengths in the image gray-scale data according to the correction table.
In step S64: corrected gray-scale data is generated and input to the driver.
In step S65: and generating driving signals of various wavelengths according to the corrected gray scale data, and driving the gray scale data signals of the display component according to the driving signals.
The image input end is connected with the calculator, so that image gray scale data can be input into the calculator.
In addition, the correction table may include a plurality of gray scale intervals, and each gray scale interval correspondingly includes a correction value. The image gray scale data may include a first gray scale level, a second gray scale level and a third gray scale level.
Please refer to fig. 7, which is a flowchart illustrating a gray scale control method of a display device according to another embodiment of the present invention. As shown in the figure, the gray scale control method of the display device of the invention comprises the following steps:
in step S71: inputting image gray scale data to a calculator.
In step S72: and subtracting the correction value from the gray level of at least one wavelength in the image gray-scale data according to the correction table.
In step S73: and adding correction values to the gray levels of other wavelengths in the image gray-scale data according to the correction table.
In step S74: the corrected gray scale data is generated and input to the driver according to the timing control signal.
In step S75: and generating driving signals of various wavelengths according to the corrected gray scale data, and driving the gray scale data signals of the display component according to the driving signals.
According to the display device and the gray scale control method thereof, the correction value is subtracted from the gray scale level of at least one wavelength in the input image gray scale data according to the correction table, and the gray scale levels of other wavelengths are not changed, so that the corrected gray scale data and the driving signals of all wavelengths are generated according to the correction value, and the gray scale data signals of the display component are driven, thereby solving the problem that the mutual correlation between the light transmittance and the applied voltage has color (wavelength) dependency.
It should be noted that, in the embodiments, the description of each embodiment has respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. A display device, comprising:
a display section;
the driver is connected with the display component, generates each driving signal with each wavelength according to the corrected gray scale data and drives the gray scale data signal of the display component according to the driving signals; and
the calculator is connected with the driver, receives the image gray scale data, generates correction data of each wavelength according to a correction table, generates corrected gray scale data according to the correction data of each wavelength, and transmits the corrected gray scale data to the driver, wherein the correction data of each wavelength is as follows:
RG1＝G1-R1
RGi＝Gi
wherein RG1Said correction data for at least one wavelength, G1Is the gray level of the at least one wavelength, R1For correction values corresponding to the grey level of said at least one wavelength, RGiFor said correction data of other wavelengths, GiI is an integer greater than 1 for the gray levels of the other wavelengths.
2. The display device of claim 1, further comprising an image input connected to the calculator and inputting the image gray scale data to the calculator.
3. The display device of claim 1, wherein the calculator transmits the corrected gray-scale data to the driver according to a timing control signal provided by a timing controller.
4. The display device as claimed in claim 1, wherein the correction table comprises a plurality of gray scale intervals, and each gray scale interval correspondingly comprises the correction value.
5. The display device of claim 1, wherein the image grayscale data includes a first grayscale level, a second grayscale level, and a third grayscale level.
6. A gray scale control method of a display device is characterized by comprising the following steps:
inputting image gray scale data to a calculator;
subtracting a correction value from the gray level of at least one wavelength in the image gray scale data according to a correction table;
keeping the gray levels of other wavelengths in the image gray scale data unchanged;
generating corrected gray scale data and inputting the data to a driver; and
and generating each driving signal with each wavelength according to the corrected gray scale data, and driving a gray scale data signal of the display component according to the driving signals.
7. The method of claim 6, wherein the calculator is connected to the image input terminal to input the image gray scale data to the calculator.
8. The method as claimed in claim 6, wherein said correction table comprises a plurality of gray scale intervals, each of said gray scale intervals correspondingly comprising said correction value.
9. The method of claim 6, wherein the image gray scale data comprises a first gray scale level, a second gray scale level, and a third gray scale level.
10. A gray scale control method of a display device is characterized by comprising the following steps:
inputting image gray scale data to a calculator;
subtracting a correction value from the gray level of at least one wavelength in the image gray scale data according to a correction table;
keeping the gray levels of other wavelengths in the image gray scale data unchanged;
generating corrected gray scale data and inputting the corrected gray scale data to a driver according to a time sequence control signal; and
and generating each driving signal with each wavelength according to the corrected gray scale data, and driving a gray scale data signal of the display component according to the driving signals.
CN202011379696.5A 2020-12-01 2020-12-01 Display device and gray scale control method thereof Pending CN112562604A (en)

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Publication number Priority date Publication date Assignee Title
CN1165971A (en) * 1996-05-22 1997-11-26 国际商业机器公司 Method for driving halftone display for liquid crystal display
JPH09319334A (en) * 1996-05-22 1997-12-12 Internatl Business Mach Corp <Ibm> Intermediate display driving method for liquid crystal display
JP2008026682A (en) * 2006-07-24 2008-02-07 Mitsubishi Electric Corp Color sequential image display method and device
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Application publication date: 20210326