CN116741106A - Method and circuit system for compensating display driving parameter - Google Patents
Method and circuit system for compensating display driving parameter Download PDFInfo
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- CN116741106A CN116741106A CN202210208618.1A CN202210208618A CN116741106A CN 116741106 A CN116741106 A CN 116741106A CN 202210208618 A CN202210208618 A CN 202210208618A CN 116741106 A CN116741106 A CN 116741106A
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- 238000005192 partition Methods 0.000 claims description 5
- 235000019557 luminance Nutrition 0.000 description 19
- 238000012937 correction Methods 0.000 description 7
- 239000004973 liquid crystal related substance Substances 0.000 description 4
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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
- G09G3/3406—Control of illumination source
- G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
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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
- 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
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- Theoretical Computer Science (AREA)
- Liquid Crystal Display Device Control (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention provides a method and a circuit system for compensating driving parameters of a display, wherein the method is implemented in a backlight control circuit of a backlight module of the display and a display driving circuit of a display panel, and a preset compensation parameter table is introduced, wherein compensation parameters of the backlight module and the display panel under different brightness and chromaticity are recorded. In the operation of the backlight module and the display panel, the compensation parameter table is queried according to the voltage and current values input into the display circuit system, so that the compensation parameter can be obtained, the backlight control circuit outputs driving signals to the light emitting diode driving circuits of all the areas according to the compensation parameters of all the areas in the backlight module, and the display driving circuit outputs driving signals to the display elements of all the areas according to the compensation parameters of all the areas of the display panel.
Description
Technical Field
The present invention relates to a driving method for a display, and more particularly, to a method and circuit system for compensating driving parameters of a backlight module and a display panel of a display, which are provided for solving the problem of non-uniformity of brightness or chromaticity of backlight.
Background
The existing backlight module using mini light emitting diodes (mini LEDs) or micro LEDs (micro LEDs) is characterized in that local dimming can be performed by controlling voltage and current according to requirements, wherein the local dimming is controlled on the basis that non-uniform brightness may be generated due to voltage and current level differences of the control circuits of each sub-area, and particularly, the non-uniform brightness may be more obvious under low brightness (brightness).
Due to the characteristics of the light emitting diode, when displaying an image at low brightness, a color shift (color shift) problem of the light emitting diode in the backlight module may occur, and a current possible processing manner is to provide a common reference level signal between a plurality of light emitting diode driving circuits (LED drivers), thereby reducing a brightness non-uniformity phenomenon caused by voltage and current level differences between the sub-region control circuits.
The current correction settings for global dimming backlight uniformity (uniformity) are a set of correction parameter tables at specific backlight settings (typically maximum brightness) and are not corrected for different brightness levels.
In addition, in the prior art, for a global dimming backlight module using a light emitting diode as a backlight source, generally, only a region of a picture is segmented under a specific brightness, and a brightness correction table is established for each segmented region, and when the light emitting diode is driven, the driving voltage and current are adjusted according to the brightness correction table. Aiming at the phenomenon of low-brightness color cast of the light emitting diode in the backlight, the light emitting diode driving circuit controls the pre-charge (precharge) signal of the light emitting diode (such as current is pulled up, display time is shortened, and equivalent brightness is formed) to reduce the color cast problem of the light emitting diode under low brightness.
Disclosure of Invention
The invention provides a method and a circuit system for compensating driving parameters of a display, which aim to solve the problem that the prior art can only compensate by a circuit of a light emitting diode driver (LED driver) in a backlight module to reduce uneven backlight brightness and color cast caused by the difference of control signals (such as current) of all subareas under low brightness, and provide a plurality of groups of brightness and chromaticity compensation parameter tables of all areas on the display of the screen aiming at different brightness ranges so as to compensate the brightness and chromaticity of all areas on the display of the screen, thereby reducing and eliminating the uneven brightness and chromaticity phenomenon of the display.
The proposed circuit system is applied to a display, the display comprises a backlight module and a display panel, wherein the circuit system comprises a backlight control circuit of the backlight module and one or more light emitting diode driving circuits, and each light emitting diode driving circuit is electrically connected with the backlight control circuit and used for controlling the operation of a plurality of light emitting diodes in one area of the backlight module; the circuitry of the display also includes a display drive circuit of the display panel, the display drive circuit being capable of zone controlling display elements of the display panel.
According to an embodiment of a method for compensating driving parameters of a display, the method is performed in circuitry in the display, wherein a compensation parameter table is required to be established first, the method for establishing the compensation parameter table is to divide an image input into the display into a plurality of areas, obtain brightness and chromaticity information of each area, compare a brightness reference value with a chromaticity reference value, calculate brightness compensation parameters and chromaticity compensation parameters of a backlight control circuit and a display driving circuit in each area in the display, and establish the compensation parameter table accordingly.
In the method for compensating the driving parameters of the display, after the display is started, a group of voltage and current values are input into the circuit system of the display, such as a backlight control circuit, and a compensation parameter table is introduced at the moment, wherein the compensation parameters of the display under different brightness are recorded, and then the voltage and current values input into the display are obtained after the brightness is set according to the statistics of the current display picture or the parameters used, so that the compensation parameters for controlling the display are obtained, and the display is driven according to the compensation parameters.
Preferably, the compensation parameter table records brightness compensation parameters of the backlight module of the display under different brightness and chromaticity compensation parameters of the display panel of the display under different brightness. The method is applied to a backlight control circuit of a display, and the backlight control circuit outputs driving signals to a light emitting diode driving circuit of each area in a backlight module according to brightness compensation parameters so as to correct the problem of uneven brightness among each area in the backlight module. And, the brightness compensation parameters introduced into the compensation parameter table comprise pulse width modulation working period, voltage or current compensation values of the driving circuit of the light emitting diode of each region.
In the step of obtaining the brightness compensation parameter of the input backlight control circuit according to the compensation parameter table, the compensation parameter history data of the display is also referred to, and the brightness compensation parameter of the input backlight control circuit is dynamically corrected. Further, when the brightness compensation parameter dynamically corrected and input to the backlight control circuit is obtained, the brightness compensation parameter currently operated by the backlight control circuit is considered, and a smoothing process is performed, so that the problem that the backlight module generates flicker when the brightness compensation parameter is switched can be avoided.
Further, the method is applied to a display driving circuit of the display, and the display driving circuit outputs a driving signal to a display element of the display panel according to the chromaticity compensation parameter. The display driving circuit preferably controls the red, green and blue channel values of each pixel of the display panel to correct the problem of uneven brightness and chromaticity among the areas in the display panel.
The brightness and chromaticity information of each region is obtained by recording brightness and chromaticity characteristics between each region in the frame image under a color gamut, a brightness and a brightness curve.
For a further understanding of the nature and the technical aspects of the present invention, reference should be made to the following detailed description of the invention and the accompanying drawings, which are provided for purposes of reference only and are not intended to limit the invention.
Drawings
FIG. 1 is a schematic diagram of circuitry for performing a method of compensating display driving parameters according to an embodiment of the present invention;
FIG. 2 is a flow chart illustrating a method for compensating display driving parameters according to an embodiment of the present invention for creating a compensation parameter table;
FIG. 3 is a flow chart illustrating a method for dynamically correcting compensation parameters in a method for compensating display driving parameters according to an embodiment of the invention;
FIG. 4 is a flow chart of a method for compensating display driving parameters according to an embodiment of the invention; and
FIG. 5 is a flowchart illustrating a method for generating compensation parameters in a method for compensating display driving parameters according to an embodiment of the invention.
Reference numerals illustrate:
100-backlight control circuit 11-power module 13-display system
15-compensation parameter table 101-led drive 102-led drive
Circuit I and circuit II
103-light emitting diode driving 105-light emitting diode 17-display driving circuit
Circuit III
107-display panel 51-luminance grouping curve 52-luminance compensation parameter table
53-chromaticity compensation parameter tables S201-S209-set up compensation S301-S309-dynamic correction
Flow of flow compensation parameters of parameter table
S401-S417-Compensation displays S501-S507-Compensation is generated
Flow of flow parameters for driver driven parameters
Detailed Description
The following embodiments of the present invention are described in terms of specific examples, and those skilled in the art will recognize the advantages and effects of the present invention based on the disclosure herein. The invention is capable of other and different embodiments and its several details are capable of modification and variation in various respects, all without departing from the spirit of the present invention. The drawings of the present invention are merely schematic illustrations, and are not intended to be drawn to actual dimensions. The following embodiments will further illustrate the related art content of the present invention in detail, but the disclosure is not intended to limit the scope of the present invention.
It will be understood that, although the terms "first," "second," "third," etc. may be used herein to describe various elements or signals, these elements or signals should not be limited by these terms. These terms are used primarily to distinguish one element from another element or signal from another signal. In addition, the term "or" as used herein shall include any one or combination of more of the associated listed items as the case may be.
The invention provides a method and a circuit system for compensating driving parameters of a display, wherein the method is implemented in the circuit system of the display of an electronic device, and the circuit system mainly comprises a backlight module, a backlight control circuit, a display panel and a display driving circuit in the display. The backlight control circuit is used for driving a light source in a backlight module, and the backlight module adopts a mini light emitting diode (mini LED) or a micro light emitting diode (micro LED) as the light source, and the display panel is a liquid-crystal display (LCD). The proposed method and circuit system for compensating display driving parameters are applicable to backlight modules with Local Dimming (Global Dimming) function, and also applicable to Global Dimming (Global Dimming) backlight modules using light emitting diodes as backlight sources, one of the purposes is to provide a solution for compensating display driving parameters for the problem of non-uniformity of backlight brightness or chromaticity, and further, taking a backlight module with Local Dimming function as an example, the proposed scheme for compensating driving parameters can reduce the problem of non-uniformity and color cast of backlight brightness between different partitions under low brightness.
The problem that the backlight module has uneven brightness and/or chromaticity among areas under low brightness is mainly caused by different driving parameters such as voltage and current output by the light emitting diode driving circuits in different areas, so that the compensation mode is to design a plurality of groups of brightness compensation parameter tables and chromaticity compensation parameter tables aiming at different brightness ranges, and respectively provide a backlight control circuit and a display driving circuit so that the backlight module and the display panel can be driven in a partitioning manner according to the brightness information of a display, the brightness and chromaticity difference among the areas can be reduced, and the aim of uniform overall brightness and/or chromaticity of a picture is further achieved.
Fig. 1 is a schematic diagram of a circuit system for performing a method for compensating driving parameters of a display according to an embodiment of the present invention, wherein the circuit system is shown to operate the method for compensating driving parameters of the display, and the circuit system mainly includes a backlight control circuit 100 disposed in the display, and at least one light emitting diode driving circuit (101, 102, 103) in the backlight module for driving the light emitting diode 105 in a partition manner, and each light emitting diode driving circuit (101, 102, 103) is shown to be electrically connected to the backlight control circuit 100; the circuit system further includes a display driving circuit 17, the display driving circuit 17 is electrically connected to the display panel 107, and the display panel 107 is, for example, a liquid crystal display panel (LCD panel), and the display driving circuit 17 controls display elements in the display panel, such as liquid crystal, according to the driving signals, so as to control red, green and blue channel values of each pixel.
According to an embodiment, the backlight module includes a plurality of leds 105 arranged in an array, and the leds 105 are driven in a partitioned manner according to the local dimming requirement, and a plurality of led driving circuits are shown in the drawing, which are respectively denoted as a first led driving circuit 101, a second led driving circuit 102 and a third led driving circuit 103. The LED driving circuits control the operation of the LEDs in each region through electric signals such as voltage, current and the like so as to emit specific brightness and color temperature. The first led driving circuit 101, the second led driving circuit 102 and the third led driving circuit 103 are controlled by a backlight control circuit 100, and the backlight control circuit 100 controls the first led driving circuit to operate in a global dimming or local dimming mode according to the display requirement of the display system 13, and includes supplying power to the leds 105 through the led driving circuits (101, 102, 103) by the power supply module 11.
According to the embodiment of the method for compensating the driving parameters of the display, a memory is provided in the applied circuitry, in this embodiment, the compensation parameter table 15 is used for storing compensation parameters previously established according to the measured luminance and chromaticity information, and the compensation parameter table 15 records the luminance compensation parameters of the backlight module of the display at different luminances and the chromaticity compensation parameters of the display panel 107 of the display at different luminances. For example, the brightness compensation parameter may be a pulse width modulation duty (PWM duty), a voltage or a current compensation value of the led driving circuit in each region of the backlight module; the display driving circuit 17 can output driving signals to the display elements of the display panel 107 according to the chromaticity compensation parameters, so as to perform brightness and chromaticity compensation of each area on the display, reduce brightness and chromaticity differences between pixels, and reduce and eliminate brightness and chromaticity non-uniformity.
When the display is started, the voltage and current values are input into the backlight control circuit of the display, and the input values can be factory values, initial values set by a user or voltage and current values determined by a local dimming technology or a global dimming technology, so that the backlight control circuit operates according to the input voltage and current values. Thus, when the display has uneven brightness among multiple regions due to low brightness value, i.e. the input voltage and current value cause difference of brightness and chromaticity of each region, a pre-established compensation parameter table is introduced.
The circuit system provided by the invention comprises a backlight control circuit 100 and a display driving circuit 17, and the circuit system executes a method for compensating driving parameters of a display according to the conditions, namely, a compensation parameter table 15 is introduced from a memory of the circuit system, wherein compensation parameters of a backlight module and a display panel under different brightness and chromaticity are recorded, the circuit system queries the compensation parameter table 15 according to the voltage and current values of the backlight control module of the display which are currently or initially set so as to obtain brightness and chromaticity compensation parameters corresponding to the voltage and current values, and new compensation voltage and current values which are subjected to the backlight control circuit 100 and the compensation parameters provided for the display driving circuit 17 can be obtained according to the compensation parameters. Then, the backlight control module 100 outputs driving signals to the led driving circuits (101, 102, 103) according to the brightness compensation parameters of each region in the backlight module, and meanwhile, the display driving circuit 17 introduces the chromaticity compensation parameters in the compensation parameter table, and accordingly outputs driving signals to the display elements of the display panel 107, and controls the display parameters thereof, such as red, green and blue channel values of each pixel, so as to correct the problem of uneven brightness and chromaticity between each region in the display panel 107, and the display driving circuit 17 outputs driving signals to the display elements of the display panel 107 according to the chromaticity compensation parameters.
The method of creating the compensation parameter table in advance according to the display characteristics can refer to the flowchart of the embodiment shown in fig. 2, where the compensation parameter table mainly records the brightness compensation parameters of the backlight module under various brightness information and the chromaticity compensation parameters of the display panel under various brightness information.
In the process, a frame of image received by the display is obtained (step S201), then the image is divided into a plurality of sub-areas according to the design of the multi-area leds differentiated in the local dimming backlight module (step S203), and luminance and chromaticity information of each area is obtained (step S205), wherein the obtained luminance and chromaticity information of each area can be the luminance and chromaticity characteristics between each area on a display screen of the display under a color gamut, a luminance and a luminance curve. At this time, the brightness and/or chromaticity information can be compared with a brightness reference value and/or a chromaticity reference value set according to the requirements of the display, and the compensation parameters of the brightness and chromaticity of each region are determined (step S207), and a compensation parameter table is established (step S209), wherein the brightness compensation parameters of the backlight module of the display under different brightness and the chromaticity compensation parameters of the display panel of the display under different brightness are recorded and can be stored in a memory of the circuit system.
It is mentioned that the brightness information of each area in the display described in the compensation parameter table can be represented by a brightness grouping curve, wherein the brightness grouping curve describes the compensation parameters corresponding to different brightness ranges, so that the circuit system refers to the brightness grouping curve to determine the compensation parameters of the backlight control circuit and the display driving circuit in the display for brightness and chromaticity according to the currently measured brightness information.
Taking the local dimming backlight module as an example, the local dimming backlight module is used for measuring the brightness and the chromaticity in the different brightness ranges, and the purpose is to record the brightness and the chromaticity characteristics of each section of the screen by utilizing the memory of the circuit system under the specific color gamut, the specific brightness curve and the specific brightness, wherein the brightness and the chromaticity characteristics of each section are used for calculating the compensation value of each section of the picture, and each section establishes the respective compensation parameter and records the compensation parameter in the compensation parameter table.
Further, the compensation parameter table may be used to search the compensation parameter table according to brightness information of each region in the display to obtain brightness compensation parameters of the input backlight control circuit, or to obtain chromaticity compensation parameters of the input display driving circuit, wherein the compensation parameters of the input backlight control circuit and/or the display driving circuit can be dynamically corrected by referring to the characteristics of the display panel and the interaction relationship between the partitions when calculating the dynamic compensation parameters and also referring to the compensation parameter history data of the display, and the flowchart of the related embodiment is shown in fig. 3 and is applied to a display device.
When the display device is started (step S301), the backlight control circuit and the display driving circuit respectively introduce the compensation parameters related to the luminance and the chrominance in the compensation parameter table (step S303), and can obtain the voltage and the current values required by the backlight control circuit and the display driving circuit of each area according to the current display picture or the user setting (step S305). Then, the compensation parameter table can be queried according to the voltage and current values of each region to obtain the compensation voltage and current values required by the backlight control circuit and the display driving circuit, thereby obtaining the compensation value required by the display circuit (step S307). The reference method of the compensation parameter is to search the compensation parameter table according to the current voltage and current values inputted to the backlight control circuit to obtain a new set of compensated voltage and current values and a set of compensation parameters of the display driving circuit.
The brightness information of the backlight module queries a brightness compensation parameter table to obtain compensation parameters for adjusting the LED driving circuits of all the subareas, namely, outputting voltage and current to the LED driving circuits of all the subareas; on the other hand, the method also comprises the step of inquiring the chromaticity compensation parameter table to obtain compensation parameters for adjusting each display element in the display panel, wherein the embodiment is to control red, green and blue channel values of each pixel in the display panel. Then, the process of dynamically correcting the compensation parameters of the circuit system is entered (step S309), and new compensation parameters are calculated by referring to the display characteristics, the interaction influence relationship of each region and the compensation parameter history data in the process of dynamically correcting the compensation parameters.
However, when the compensation parameters of the input backlight control circuit and the display driving circuit are dynamically corrected to perform dynamic compensation, the backlight module or the display panel will generate a flicker problem when the compensation parameters are switched, so, according to the method embodiment of compensating the display driving parameters, the compensation parameters of the current backlight control circuit (or the display driving circuit) are considered, and a smoothing process (smoothing) is performed to avoid the flicker problem, and the flowchart of the embodiment is shown in fig. 4.
The display device is started (step S401), the voltage and current values required by the backlight of each area are obtained according to the current picture or the user setting (step S403), the compensation parameters are obtained by referring to the compensation parameter table (step S405), or the dynamic correction compensation parameters can be executed in consideration of the current situation (step S407), the parameter history data is referred to (step S410), and the smoothing process is executed when the new and old compensation parameters are switched (step S409). Taking a backlight module as an example, wherein the compensation parameters applicable to each sub-region are selected according to the real-time operation of the backlight variation, the compensation parameters are smoothed by referring to the new compensation parameters and the currently used compensation parameters, and the processed values are applied to brightness or chromaticity adjustment, so as to solve the problem that the backlight control circuit causes the backlight module to flicker when switching the compensation parameters. Then, new compensation parameters can be dynamically calculated by referring to the characteristics of the backlight module and the display panel, the interaction relation between pixels in each region of the display and the historical data of the compensation parameters, and can be respectively input into the backlight control circuit and the display driving circuit (step S411), the local backlight brightness is set according to the brightness compensation parameters (step S413), the local display chromaticity of the display panel is set according to the chromaticity compensation parameters (step S415), and then the circuit system updates the picture (step S417).
FIG. 5 is a flowchart illustrating a method for generating compensation parameters in a method for compensating display driving parameters according to an embodiment of the invention.
In the process of compensating the display driving parameters, each frame of image is obtained (step S501), and the luminance information of the multi-region led and the chromaticity information of the display panel are obtained according to each frame of image or the user setting (step S503), and then a compensation parameter table is introduced, wherein, according to the embodiment, the luminance grouping curve 51, the luminance compensation parameter table 52 and the chromaticity compensation parameter table 53 can be considered to obtain the compensation parameters for providing the backlight control circuit and the display driving circuit (step S505). According to an embodiment, the flow of performing dynamic compensation shown in fig. 3 may also be considered, and the smoothing process adopted when switching different compensation parameters is described in fig. 4, the compensation parameters are input to the backlight control circuit and the display driving circuit (step S507), and according to the brightness compensation parameters of each region in the backlight module, the voltage or current compensation value of the light emitting diode driving circuit of each region is driven, so that the backlight control circuit outputs a driving signal to the light emitting diode driving circuit of each region, and the brightness of each region is finely tuned to be consistent; further, the operation of the display elements in each region can be driven according to the chromaticity compensation parameters in each region of the display panel to obtain the chromaticity correction parameters of each sub-region. Therefore, the brightness value among the areas of the local dimming backlight module is adjusted and controlled to correct the brightness non-uniformity among the areas of the screen under the low brightness, and the red, green and blue channel values of the pixels in the display panel are adjusted and controlled to correct the brightness and chromaticity non-uniformity among the areas of the screen under the low brightness.
It is noted that the operation of switching different compensation parameters by looking up the table may be one-time switching or multi-time stepwise switching, and because the established chromaticity compensation parameter table 53 may have limited compensation parameters recorded by comparing with the brightness information, more accurate compensation parameters may be obtained by interpolation after corresponding groups of compensation parameters under various brightness information are recorded therein.
For example, according to the determined compensation parameter, the electrical parameter sent by the backlight control circuit to the driving circuit of each area of light emitting diode, such as a pulse width modulation duty (PWM duty) or a current for driving the light emitting diode to operate, can be adjusted to achieve the purpose of correcting the brightness and the chromaticity non-uniformity among each area of the screen under the low brightness by adjusting the RGB value of each pixel in the corresponding display panel (such as a liquid crystal display panel) of each area of the light emitting diode in the backlight module.
In summary, according to the method and the circuit system for compensating driving parameters of a display described in the above embodiments, the circuit system can provide a plurality of sets of luminance and chrominance compensation parameters for different luminance ranges, wherein a compensation parameter table is introduced, which is a compensation table established by measuring the luminance and chrominance of the backlight module and the display during the factory calibration stage, and is stored in the circuit system of the display for compensating the luminance and chrominance between the backlight module and the sub-region of the display panel during the operation of the display, so as to eliminate the phenomenon of uneven luminance and color cast of the light emitting diode of the local dimming display under low luminance.
The foregoing disclosure is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention, so all technical equivalents which apply to the present description and the accompanying drawings are included in the scope of the present invention.
Claims (10)
1. A method for compensating display driving parameters, implemented in a circuitry of a display, comprising:
starting a display;
inputting a set of voltage and current values to the circuitry after the display is started;
introducing a compensation parameter table, wherein compensation parameters of the display under different brightness are recorded;
inquiring the compensation parameter table according to the group voltage and current values to obtain compensation parameters for controlling the display; and
the circuitry drives the display according to the compensation parameter.
2. The method according to claim 1, wherein the compensation parameter table records brightness compensation parameters of a backlight module of the display at different brightness and chromaticity compensation parameters of a display panel of the display at different brightness.
3. The method of claim 2, wherein the method is applied to a backlight control circuit of the display, and the backlight control circuit outputs driving signals to the led driving circuits of the regions in the backlight module according to the brightness compensation parameters to correct the problem of uneven brightness between the regions in the backlight module.
4. A method of compensating for display drive parameters according to claim 3, wherein the brightness compensation parameters introduced into the compensation parameter table comprise pulse width modulation duty cycle, voltage or current compensation values for driving the individual zone light emitting diode driving circuits.
5. The method of compensating display driving parameters according to claim 4, wherein in the step of deriving the luminance compensation parameters inputted to the backlight control circuit from the compensation parameter table, the luminance compensation parameters inputted to the backlight control circuit are dynamically corrected with reference to the compensation parameter history data of the display.
6. The method of claim 5, wherein when obtaining the brightness compensation parameters dynamically corrected by the backlight control circuit, taking into account the brightness compensation parameters currently running in the backlight control circuit, performing a smoothing process to avoid flickering when the backlight module switches the brightness compensation parameters.
7. The method according to claim 2, wherein the method is applied to a display driving circuit of the display, the display driving circuit outputs driving signals to display elements of the display panel according to the chromaticity compensation parameters, wherein the chromaticity compensation parameters in the compensation parameter table are introduced according to brightness and chromaticity information of each of a plurality of partitions of the display, and the display driving circuit controls red, green and blue channel values of each pixel of the display panel to correct brightness and chromaticity non-uniformity problems between each of the partitions of the display panel.
8. A method of compensating for display drive parameters according to any of claims 2 to 7, wherein the method of establishing the compensation parameter table comprises:
acquiring a frame of image input to the display;
dividing the frame image into a plurality of areas;
obtaining brightness and chromaticity information of each region, namely recording brightness and chromaticity characteristics among the regions in the frame image under a color gamut, a brightness and a brightness curve;
comparing a brightness reference value with a chrominance reference value, and calculating brightness compensation parameters and chrominance compensation parameters of the backlight control circuit and the display driving circuit in each region in the display; and
and establishing the compensation parameter table.
9. The method of claim 8, wherein the compensation parameter table comprises a brightness compensation parameter table and a chrominance compensation parameter table, the backlight module is a local dimming backlight module, wherein brightness information of each region is represented by a brightness grouping curve, and the brightness grouping curve is used for providing the plurality of brightness compensation parameters of the backlight control circuit and providing the plurality of chrominance compensation parameters of the display driving circuit for different brightness ranges.
10. Circuitry for use in a display, comprising:
a backlight control circuit electrically connected with one or more LED driving circuits in a backlight module of the display and used for controlling the operation of a plurality of LEDs in each area of the backlight module;
a display driving circuit connected with a display panel of the display for driving a plurality of display elements in the display panel;
wherein the circuitry performs a method of compensating for display drive parameters, comprising:
inputting a set of voltage and current values to the circuitry after the display is started;
introducing a compensation parameter table, wherein compensation parameters of the display under different brightness are recorded;
inquiring the compensation parameter table according to the group voltage and current values to obtain compensation parameters for controlling the display; and
and driving the display according to the compensation parameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210208618.1A CN116741106A (en) | 2022-03-04 | 2022-03-04 | Method and circuit system for compensating display driving parameter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210208618.1A CN116741106A (en) | 2022-03-04 | 2022-03-04 | Method and circuit system for compensating display driving parameter |
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