CN116092419A - Automatic adjustment method for current gain of LED display driving chip - Google Patents
Automatic adjustment method for current gain of LED display driving chip Download PDFInfo
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- CN116092419A CN116092419A CN202211580029.2A CN202211580029A CN116092419A CN 116092419 A CN116092419 A CN 116092419A CN 202211580029 A CN202211580029 A CN 202211580029A CN 116092419 A CN116092419 A CN 116092419A
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- 238000000926 separation method Methods 0.000 claims abstract description 10
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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
- G09G3/22—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 using controlled light sources
- G09G3/30—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 using controlled light sources using electroluminescent panels
- G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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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
- G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Led Devices (AREA)
Abstract
The invention discloses an automatic current gain adjusting method for an LED display driving chip, and belongs to the field of LED display. Setting N-gear current gain adjustment, wherein N is any positive integer; setting an integer n, wherein the value range is [0, N-1]]The method comprises the steps of carrying out a first treatment on the surface of the Dividing the time of one frame of picture into 2 according to the bit number C of binary gray data C A number of CLK cycles; maximum gray value 2 represented by binary gray data of C bits C 1 is divided into N sections, and the separation values of two adjacent sections are written into a register through an upper computer; according to the interval of the gray value of the binary gray data to be displayed, automatically changing the current gain to the corresponding gear; determining the channel opening cycle number according to the interval of the gray value to be displayed, wherein the channel opening cycle number is the gray value to be displayed multiplied by a coefficient K, and the coefficients corresponding to the N-N th grade are as follows: k=2 n . The invention can improve the refresh rate when displaying the low-gray-scale picture, and improve the display effect of the low-gray-scale picture under the condition that the display brightness is kept unchanged.
Description
Technical Field
The invention relates to the technical field of LED display, in particular to an automatic current gain adjusting method for an LED display driving chip.
Background
The current gain adjusting function is generally supported by the existing LED display driving chip, but as the current-brightness curve of the LED lamp is nonlinear, the brightness values of different gray intervals can be changed in a nonlinear way by simply adjusting the current gain, and the color can be distorted. Therefore, an effective current gain adjustment mode is needed, which can set different current gains for different gray values, so as to ensure that the brightness value variation trend in each gray interval is always, and solve the problem of color distortion.
Disclosure of Invention
The invention aims to provide an automatic adjustment method for current gain of an LED display driving chip, which aims to solve the problems in the background technology.
In order to solve the technical problems, the invention provides an automatic adjustment method for current gain of an LED display driving chip, which comprises the following steps:
step 1, setting N-gear current gain adjustment, wherein N is any positive integer; setting an integer n, wherein the value range of the integer n is [0, N-1];
step 2, dividing the time of a frame of picture into 2 according to the bit number C of the binary gray data C A number of CLK cycles; maximum gray value 2 represented by binary gray data of C bits C 1 is divided into N sections, and the separation values of two adjacent sections are written into a register through an upper computer;
step 3, automatically changing the current gain to the corresponding gear according to the interval of the gray value of the binary gray data to be displayed;
step 4, determining the channel opening cycle number according to the interval where the gray value to be displayed is located, wherein the channel opening cycle number is the gray value to be displayed multiplied by a coefficient K, and the coefficients corresponding to the N-N th grade are as follows: k=2 n 。
In one embodiment, the corresponding current gain for the N-th gear is: 100% current gain x 2 -n The method comprises the following steps: the nth gear corresponds to 100% current gain, the N-1 gear corresponds to 50% current gain, the N-2 gear corresponds to 25% current gain, and so on.
In one embodiment, the minimum gray value of the binary gray data is located in the interval 1, the maximum gray value is located in the interval N, and the gray value gradually increases from the interval 1 to the interval N.
In one embodiment, the separation value of the two adjacent intervals is determined according to the current-brightness characteristic curves of different LED lamps, and the variable interval separation value can enable the chip to support the LED lamps with different current-brightness characteristic curves so as to improve the universality of the algorithm.
In one embodiment, in the step 4, the coefficient corresponding to the data with the gray value in the interval N is k=2 0 =1; the data having a gray value in the interval N-1 corresponds to a coefficient of k=2 1 =2; the data having gray values in interval N-2 corresponds to a coefficient of k=2 2 =2, and so on.
In one embodiment, the product of the coefficient K of the nth gear and the current gain of the nth gear in the step 4 is fixed to 1.
In the method for automatically adjusting the current gain of the LED display driving chip, the driving current gain is automatically adjusted according to the gray value of the input gray data, the channel opening period number is changed, the refresh rate when the low gray picture is displayed is improved by reducing the current gain in the low gray interval and improving the channel opening period number, and the display effect of the low gray picture is improved under the condition that the display brightness is kept unchanged.
Drawings
Fig. 1 is a schematic diagram of a current gain gear and gray value interval provided by the present invention.
Detailed Description
The invention provides an automatic current gain adjusting method for an LED display driving chip, which is further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are in a very simplified form and are all to a non-precise scale, merely for convenience and clarity in aiding in the description of embodiments of the invention.
The invention provides an automatic adjustment method for current gain of an LED display driving chip, which comprises the following steps:
step 1, setting N-gear current gain adjustment, wherein N can be any positive integer theoretically; setting the value range of the integers n and n to be [0, N-1]]The method comprises the steps of carrying out a first treatment on the surface of the The corresponding current gain of the N-N th gear is: 100% current gain x 2 -n The method comprises the following steps: the N-th gear corresponds to 100% current gain, the N-1 th gear corresponds to 50% current gain, the N-2 nd gear corresponds to 25% current gain, and so on;
step 2, dividing the time of a frame of picture into 2 according to the bit number C of the binary gray data C A number of CLK cycles; maximum gray value 2 represented by binary gray data of C bits C 1 is divided into N sections, and the separation values of two adjacent sections are written into a register through an upper computer; the minimum gray value is located in a section 1, the maximum gray value is located in a section N, and the gray value gradually increases from the section 1 to the section N; the separation value of the two adjacent intervals is determined according to the current-brightness characteristic curves of different LED lamps, and the chip can support the LED lamps with different current-brightness characteristic curves by adopting the variable interval separation value, so that the universality of the algorithm is improved;
step 3, automatically changing the current gain to the corresponding gear according to the interval of the gray value to be displayed;
step 4, determining the channel opening cycle number (namely the CLK cycle number) according to the interval x where the gray value to be displayed is located, wherein the channel opening cycle number is the gray value to be displayed multiplied by a coefficient K, and the coefficients corresponding to the N-N th grade are as follows: k=2 n The method comprises the following steps: the data having a gray value in the interval N corresponds to a coefficient of k=2 0 =1; the data having a gray value in the interval N-1 corresponds to a coefficient of k=2 1 =2; the data having gray values in interval N-2 corresponds to a coefficient of k=2 2 And so on, as shown in fig. 1.
And in the step 4, the product of the coefficient K of the N th gear and the current gain of the N th gear is fixed to be 1.
The invention automatically adjusts the driving current gain according to the gray value of the input gray data, changes the channel opening period number, and improves the refresh rate when displaying the low gray picture by reducing the current gain and improving the channel opening period number in the low gray interval, and improves the display effect of the low gray picture under the condition that the display brightness is kept unchanged.
The above description is only illustrative of the preferred embodiments of the present invention and is not intended to limit the scope of the present invention, and any alterations and modifications made by those skilled in the art based on the above disclosure shall fall within the scope of the appended claims.
Claims (6)
1. The automatic current gain adjusting method for the LED display driving chip is characterized by comprising the following steps of:
step 1, setting N-gear current gain adjustment, wherein N is any positive integer; setting an integer n, wherein the value range of the integer n is [0, N-1];
step 2, dividing the time of a frame of picture into 2 according to the bit number C of the binary gray data C A number of CLK cycles; maximum gray value 2 represented by binary gray data of C bits C 1 is divided into N sections, and the separation values of two adjacent sections are written into a register through an upper computer;
step 3, automatically changing the current gain to the corresponding gear according to the interval of the gray value of the binary gray data to be displayed;
step 4, determining the channel opening cycle number according to the interval where the gray value to be displayed is located, wherein the channel opening cycle number is the gray value to be displayed multiplied by a coefficient K, and the coefficients corresponding to the N-N th grade are as follows: k=2 n 。
2. The method for automatically adjusting the current gain of an LED display driver chip according to claim 1, wherein the current gain corresponding to the N-th gear is: 100% current gain x 2 -n The method comprises the following steps: the nth gear corresponds to 100% current gain, the N-1 gear corresponds to 50% current gain, the N-2 gear corresponds to 25% current gain, and so on.
3. The method for automatically adjusting current gain of LED display driving chip according to claim 1, wherein the minimum gray value of the binary gray data is located in a section 1, the maximum gray value is located in a section N, and the gray value increases gradually from the section 1 to the section N.
4. The method for automatically adjusting current gain of LED display driving chip according to claim 1, wherein the separation value of two adjacent intervals is determined according to current-brightness characteristic curves of different LED lamps, and the variable interval separation value is adopted to enable the chip to support the LED lamps with different current-brightness characteristic curves so as to improve the universality of the algorithm.
5. The method for automatically adjusting current gain of LED display driving chip according to claim 1, wherein in step 4, the data having gray level value in interval N corresponds to a coefficient of k=2 0 =1; the data having a gray value in the interval N-1 corresponds to a coefficient of k=2 1 =2; the data having gray values in interval N-2 corresponds to a coefficient of k=2 2 =2, and so on.
6. The method of claim 5, wherein the product of the coefficient K of the nth gear and the current gain of the nth gear in the step 4 is fixed to be 1.
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| CN202211580029.2A CN116092419B (en) | 2022-12-09 | 2022-12-09 | Automatic adjustment method for current gain of LED display driving chip |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116844468A (en) * | 2023-08-30 | 2023-10-03 | 深圳市明微电子股份有限公司 | LED hybrid dimming method, device and computer readable storage medium |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105825489A (en) * | 2016-02-01 | 2016-08-03 | 南京理工大学 | Infrared image enhancement method based on combination of gray translation and linear stretching |
| US20160307490A1 (en) * | 2015-04-15 | 2016-10-20 | Samsung Display Co., Ltd. | Organic light-emitting diode display and method of driving the same |
| US20180145116A1 (en) * | 2016-11-23 | 2018-05-24 | Samsung Electronics Co., Ltd. | Display apparatus and driving method of display panel |
| WO2022021123A1 (en) * | 2020-07-29 | 2022-02-03 | 西安钛铂锶电子科技有限公司 | Display drive circuit and method, led display panel, and display apparatus |
| CN114464124A (en) * | 2020-10-30 | 2022-05-10 | 西安诺瓦星云科技股份有限公司 | Display device, display method thereof, processor and computer storage medium |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160307490A1 (en) * | 2015-04-15 | 2016-10-20 | Samsung Display Co., Ltd. | Organic light-emitting diode display and method of driving the same |
| CN105825489A (en) * | 2016-02-01 | 2016-08-03 | 南京理工大学 | Infrared image enhancement method based on combination of gray translation and linear stretching |
| US20180145116A1 (en) * | 2016-11-23 | 2018-05-24 | Samsung Electronics Co., Ltd. | Display apparatus and driving method of display panel |
| WO2022021123A1 (en) * | 2020-07-29 | 2022-02-03 | 西安钛铂锶电子科技有限公司 | Display drive circuit and method, led display panel, and display apparatus |
| CN114464124A (en) * | 2020-10-30 | 2022-05-10 | 西安诺瓦星云科技股份有限公司 | Display device, display method thereof, processor and computer storage medium |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116844468A (en) * | 2023-08-30 | 2023-10-03 | 深圳市明微电子股份有限公司 | LED hybrid dimming method, device and computer readable storage medium |
| CN116844468B (en) * | 2023-08-30 | 2023-11-03 | 深圳市明微电子股份有限公司 | LED hybrid dimming method, device and computer readable storage medium |
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