CN102184708A - Novel passive matrix driving device for local backlight regulation - Google Patents
Novel passive matrix driving device for local backlight regulation Download PDFInfo
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- CN102184708A CN102184708A CN2011101200317A CN201110120031A CN102184708A CN 102184708 A CN102184708 A CN 102184708A CN 2011101200317 A CN2011101200317 A CN 2011101200317A CN 201110120031 A CN201110120031 A CN 201110120031A CN 102184708 A CN102184708 A CN 102184708A
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Abstract
The invention relates to a novel passive matrix driving device for local backlight regulation, which comprises a driving module and a light-emitting diode (LED) matrix module and is characterized in that LEDs are connected in a matrix mode; and output pins of a matrix are respectively connected with corresponding pins of the driving module (for example, the output pins X1 to X8 correspond to the pins CS1 to CS8 and the output pins Y1 to Y8 correspond to the pins CS9 to CS16) so as to singly control current to regulate LED light. The technical scheme is novel, the implementation method is specific, and the novel passive matrix driving device has high using value in the field of application of LED dimming control.
Description
Technical field
The present invention relates to a kind of new type of passive matrix driving device that is used for local adjusting backlight.
Background technology
At present, among the existing 2D local dimming chip solution, mainly adopt direct drive form, each driving circuit pin can only drive one group of corresponding LED light bar, also will connect the VLED pin simultaneously.Therefore, every n group light bar needs the corresponding driving pin of n+1 group to connect, when the many groups of driving light bar, need many chip, cause production cost too high, for example: having 64 groups of light bar need connect, use the drive unit of original 16 pin, need 4 Chip to realize.
Summary of the invention
In view of this, the purpose of this invention is to provide a kind of new type of passive matrix driving device that is used for local adjusting backlight, the LED lamp is concatenated into the form of matrix, drive unit with a kind of simple possible increases the light bar number that drives, and then the number of saving chip for driving, thereby reach the purpose that reduces cost, the Control current that circuit can be independent simultaneously reaches the purpose of independent light modulation.
The present invention realizes like this, a kind of new type of passive matrix driving device that is used for local adjusting backlight, comprise driver module and LED matrix module, it is characterized in that: LED is connected into the form of matrix, and matrix output pin load module can be regulated the function of LED brightness to realize the zone according to the pin that predetermined set selects extraneous input signal to connect the driver module correspondence respectively.
Optional white LED of LED of the present invention or RGB LED or RGBW LED mix.
Technical solution of the present invention novelty, implementation method are concrete, have good use value in LED brightness adjustment control field.
Description of drawings
Fig. 1 is the circuit theory diagrams of the technology of the present invention.
Scanning driving device figure when Fig. 2 is the dark picture of the present invention.
Scanning driving device figure when Fig. 3 is the bright picture of the present invention.
Fig. 4 is that the present invention adopts direct driving and scanning driving device figure.
Fig. 5 is that the present invention directly drives and scanning driving device LED color saturation figure.
Fig. 6 is the drive unit figure of N frame of the present invention.
Fig. 7 is the drive unit figure of N+1 frame of the present invention.
Fig. 8 is the drive unit figure of a frame of interpolation of the present invention.
Embodiment
As shown in Figure 1, implementation of the present invention is as follows: a kind of new type of passive matrix driving device that is used for local adjusting backlight, the LED lamp is concatenated into the form of matrix, drive unit with a kind of simple possible increases the light bar number that drives, and then the number of saving chip for driving, thereby reach the purpose that reduces cost, the Control current that circuit can be independent simultaneously reaches the purpose of independent light modulation.
1) see also Fig. 1, Fig. 1 is the circuit theory diagrams of a concrete enforcement, and CS1 ~ CS8 connects X1 ~ X8 pin among the figure, and CS9 ~ CS16 meets Y1 ~ Y8, pin, and wherein the plus or minus of LED or LED light bar is connected to X1 ~ X8 extremely individually, and another is connected to Y1 ~ Y8 extremely individually.
2) adopt scanning driving device, when dark picture, it is dark to open Y8X1(earlier), Y8X2(is dark) ... Y7X1(is dark), Y7X2 (bright) ... Y6X2(is bright) ... as Fig. 2; When bright picture, bright all LED close each LED in order, as Fig. 3 earlier.
3). this case provides a kind of drive unit of simple possible, the LED light bar of driving is increased, and under the basis that connects identical light bar number, this drive unit can increase the lightbar number of driving, and then save Chip number, reach the purpose of Cost down.For example: having 64 groups of light bar need connect, and uses the drive unit of original 16 pin, needs 4 Chip to realize, but with the drive unit of this motion 16 pin, only 1 of need can be reached.
4). also Control current that can be independent reaches the purpose of independent light modulation.
5). because Passive matrix scan drives, contrast can for directly drive 1/64. but under dark picture, Power consumption also be 1/64 of direct driving.
6). LED light bar wiring is succinct
The present invention also can adopt direct driving and scanning driving device to use simultaneously, needs to form based on picture, in no Cross talk issue zone, use directly to drive, to increase or to reduce brightness, in Cross talk issue zone, use Scan to drive, to eliminate Cross talk.Need the special algorithm of development to analyze, as Fig. 4, Y1 ~ Y6 scan not wherein, Y7, Y8 is scan.Under dark picture, Power consumption be directly drive 1/64. under bright picture, power consumption increases seldom, the power consumption that on average gets off has improvement.
Other embodiment that can substitute of this motion is described:
1). also can be directly and the Scan drive unit use simultaneously, need to form based on picture, in no Cross talk issue zone, use directly to drive, to increase or minimizing brightness.In Cross talk issue zone, use Scan to drive, to eliminate Cross talk.Need the special algorithm of development to analyze, as Fig. 4, Y1～Y6 scan not wherein, Y7, Y8 is scan.
2) .LED is arranged as R-G-B-W, and for example the panel upper left corner need show redness, thus LED that can bright X1Y8 redness, to increase the color rendering (color saturation) of product. as Fig. 5.
3). dynamic compensation-, dynamically move to the X7X8Y5Y6 of N+1 frame when N frame has a bright spot X1X2Y3Y4, but interpolation one frame does dynamic compensation.As Fig. 6 ~ Fig. 8.
The above only is preferred embodiment of the present invention, and all equalizations of being done according to the present patent application claim change and modify, and all should belong to covering scope of the present invention.
Claims (2)
1. new type of passive matrix driving device that is used for local adjusting backlight, comprise driver module and LED matrix module, it is characterized in that: LED is connected into the form of matrix, and matrix output pin load module can be regulated the function of LED brightness to realize the zone according to the pin that predetermined set selects extraneous input signal to connect the driver module correspondence respectively.
2. a kind of new type of passive matrix driving device that is used for local adjusting backlight according to claim 1 is characterized in that: the LED matrix form is arranged the mode with turntable driving.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101200317A CN102184708A (en) | 2011-05-11 | 2011-05-11 | Novel passive matrix driving device for local backlight regulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101200317A CN102184708A (en) | 2011-05-11 | 2011-05-11 | Novel passive matrix driving device for local backlight regulation |
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| CN102184708A true CN102184708A (en) | 2011-09-14 |
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| CN2011101200317A Pending CN102184708A (en) | 2011-05-11 | 2011-05-11 | Novel passive matrix driving device for local backlight regulation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109686319A (en) * | 2019-01-17 | 2019-04-26 | 四川长虹电器股份有限公司 | The super more backlight subarea drive control circuits of one kind and display device |
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| CN1828708A (en) * | 2005-03-02 | 2006-09-06 | 立锜科技股份有限公司 | Method and circuit for operating passive matrix type organic light-emitting diode display panel |
| KR20070076344A (en) * | 2006-01-18 | 2007-07-24 | 엘지전자 주식회사 | Data driver and method of passive matrix organic light emitting diode for prevent crosstalk |
| CN101088141A (en) * | 2004-08-24 | 2007-12-12 | Otb集团有限公司 | In-line process for making thin film electronic devices |
| CN101556764A (en) * | 2009-05-18 | 2009-10-14 | 友达光电股份有限公司 | Method for driving passive matrix organic light emitting diode display device |
| CN101697273A (en) * | 2009-10-29 | 2010-04-21 | 彩虹集团公司 | LCD luminance uniformity automatic correcting system and method of LED backlight |
| CN101697270A (en) * | 2009-10-29 | 2010-04-21 | 彩虹集团公司 | Structure and method for controlling dynamic backlight of LED liquid crystal display device |
| CN102013206A (en) * | 2010-12-09 | 2011-04-13 | 刘俭良 | LED digital perpetual calendar directly driven by control chip and implementation method thereof |
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2011
- 2011-05-11 CN CN2011101200317A patent/CN102184708A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101088141A (en) * | 2004-08-24 | 2007-12-12 | Otb集团有限公司 | In-line process for making thin film electronic devices |
| CN1588515A (en) * | 2004-09-16 | 2005-03-02 | 徐良衡 | Driving method and circuit of polymer electroluminescent display device |
| CN1828708A (en) * | 2005-03-02 | 2006-09-06 | 立锜科技股份有限公司 | Method and circuit for operating passive matrix type organic light-emitting diode display panel |
| KR20070076344A (en) * | 2006-01-18 | 2007-07-24 | 엘지전자 주식회사 | Data driver and method of passive matrix organic light emitting diode for prevent crosstalk |
| CN101556764A (en) * | 2009-05-18 | 2009-10-14 | 友达光电股份有限公司 | Method for driving passive matrix organic light emitting diode display device |
| CN101697273A (en) * | 2009-10-29 | 2010-04-21 | 彩虹集团公司 | LCD luminance uniformity automatic correcting system and method of LED backlight |
| CN101697270A (en) * | 2009-10-29 | 2010-04-21 | 彩虹集团公司 | Structure and method for controlling dynamic backlight of LED liquid crystal display device |
| CN102013206A (en) * | 2010-12-09 | 2011-04-13 | 刘俭良 | LED digital perpetual calendar directly driven by control chip and implementation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109686319A (en) * | 2019-01-17 | 2019-04-26 | 四川长虹电器股份有限公司 | The super more backlight subarea drive control circuits of one kind and display device |
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Application publication date: 20110914 |