CN101916542A - Image display device of LED panel television - Google Patents
Image display device of LED panel television Download PDFInfo
- Publication number
- CN101916542A CN101916542A CN2010100000465A CN201010000046A CN101916542A CN 101916542 A CN101916542 A CN 101916542A CN 2010100000465 A CN2010100000465 A CN 2010100000465A CN 201010000046 A CN201010000046 A CN 201010000046A CN 101916542 A CN101916542 A CN 101916542A
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- circuit
- luminescence unit
- pixel
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- signal
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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]
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
- G09G2300/0809—Several active elements per pixel in active matrix panels
- G09G2300/0814—Several active elements per pixel in active matrix panels used for selection purposes, e.g. logical AND for partial update
Abstract
The invention discloses an image display device of an LED panel television, which improves the display effect. According to the technical scheme, the image display device of the LED panel television is characterized by consisting of an LED pixel matrix circuit, a scanning circuit line control circuit, a delay circuit and a data control line drive circuit; the anode of each light-emitting unit of the LED pixel matrix circuit is connected with the scanning control line of the scanning circuit line control circuit by an anode active switch; the cathode of each light-emitting unit of the LED pixel matrix circuit is connected with the drive data line of the data control line drive circuit by a cathode active switch; and the delay circuit is connected with the scanning control line control circuit, wherein the scanning circuit line control circuit is used for selecting the light-emitting units in the pixels in a scan period; and the data control line drive circuit is used for providing brightness information driving the light-emitting units.
Description
Technical field
The invention belongs to LED panel television image field of display devices, the especially brightness of pixel luminescence unit by time control, thereby improve the LED panel television image display device of display effect by its electric current
Background technology
Display panel is a vitals of TV, present state-of-the-art television product is the LCD liquid crystal TV set, LED-backlit salable source televisor etc. all belongs to the category of LCD LCD TV on the domestic and international market, and its display screen adopts LED display and LCD display double-decker.
The LCD panel is because the characteristics of its structure, have following deficiency: 1, brightness is not enough, 2, the LCD response time long, 3, the LCD color rendition is not enough, 4, there is the picture conditions of streaking in the LCD panel, and LED (LightEmitting Diode), light emitting diode is called for short LED, be a kind of solid-state semiconductor devices that electric energy can be converted into visible light, it can directly be converted into light to electricity.Can realize high brightness, high-contrast, high reduction degree shows, and eliminates the conditions of streaking of picture.
Still there is not at present LED panel television image display device truly.
Summary of the invention
The brightness that the purpose of this invention is to provide a kind of pixel luminescence unit is by the time control by its electric current, thus the LED panel television image display device of raising display effect.
Technical scheme of the present invention is: LED panel television image display device, it is characterized in that pixel matrix circuit by LED, the sweep circuit line control circuit, delay circuit and Data Control line drive circuit are formed, the anode of described each luminescence unit of LED pixel matrix circuit is connected with the scan control line of sweep circuit line control circuit by the anode active switch, the negative electrode of each luminescence unit of LED pixel matrix circuit is connected with the driving data lines of data system line drive circuit by the negative electrode active switch, described delay circuit is connected with the scan control line control circuit, wherein, the sweep circuit line control circuit is used for the luminescence unit in a scan period selection pixel, the Data Control line drive circuit is used to provide the monochrome information that drives this luminescence unit, the brightness of described luminescence unit is by the current lead-through time decision that loads thereon, under the sweep frequency of setting, the control luminescence unit is from lighting luminance to the required time of extinguishing state, thus the mean flow rate of control luminescence unit.
Described driving data line control circuit is carried out the row order and is driven, go sequential scanning, so that simultaneously electric signal is offered the driving data lines of pixel luminescence unit, the driving data line control circuit is carried out the driving of some sequential in addition, it is by its output signal of control in the driving data line control circuit that described some sequential drives, its output signal is not only relevant with its input signal, simultaneously relevant with the status signal that writes down in its chip, so that carry out a sequence scanning, an electric signal is provided to luminescence unit of selecting the pixel of row in the matrix type luminescence unit.
Described LED picture element matrix be every square metre of density greater than 110,000 etc. the matrix of pixel spacing.
Described sweep circuit line control circuit is selected the scan control line again in definite time period scan period, be brightness value that zero Pixel Information writes this pixel from described driving data lines, to extinguish the luminescence unit of described pixel.
Described anode active switch is the PNP triode, and the anode of pixel luminescence unit is connected with the collector of PNP triode, and the scan control line is connected with the base stage of PNP triode; Described negative electrode active switch is the PNP triode, the negative electrode of pixel luminescence unit is connected with the emitter of PNP triode, driving data lines is connected with the PNP transistor base, also be provided with an electric capacity, the two ends of described electric capacity link to each other with collector with the base stage of described negative electrode PNP triode respectively, are used to control the current value of described luminescence unit.
Described sweep circuit line drive circuit, its received signal, this signal is used for the first synchronous vertical enabling pulse of a vertical clock signal of the described sweep circuit line of continuous selection, described sweep circuit line drive circuit also is used to receive by the cycle that the first vertical enabling pulse is postponed a definite frequency and obtains another and the synchronous enabling pulse of vertical clock pulse signal, by described sweep circuit line drive circuit and this sweep circuit line of the synchronous Continuous Selection of this vertical clock pulse signal, light the luminescence unit of respective pixel, by described circuitry lines driving circuit, the luminescence unit of having lighted was extinguished synchronously with this vertical clock pulse signal in a described cycle length.
Effect of the present invention is: LED panel television image display device, by the LED pixel matrix circuit, the sweep circuit line control circuit, delay circuit and Data Control line drive circuit are formed, the anode of described each luminescence unit of LED pixel matrix circuit is connected with the scan control line of sweep circuit line control circuit by the anode active switch, the negative electrode of each luminescence unit of LED pixel matrix circuit is connected with the driving data lines of data system line drive circuit by the negative electrode active switch, described delay circuit is connected with the scan control line control circuit, wherein, the sweep circuit line control circuit is used for a luminescence unit in the scan period selection pixel, and the Data Control line drive circuit is used to provide the monochrome information that drives this luminescence unit.
This device can pass through to adjust luminescence unit brightness and demonstration time, thereby controls the color balance of whole display panel.
The present invention is described further below in conjunction with drawings and Examples.
Description of drawings
Fig. 1 is a circuit block diagram of the present invention;
Fig. 2 is control timing figure of the present invention;
Fig. 3 is the timing diagram of pixel operation of the present invention;
Fig. 4 is the circuit theory diagrams of pixel luminescence unit of the present invention;
Fig. 5 is a matrix type luminescence unit circuit diagram local circuit schematic diagram.
Embodiment
Fig. 1 is a LED panel television image display device entire circuit block diagram, pixel is with red, green, the integrated form of blue three primary colours exists, sweep circuit line L0, L1....Ln is arranged in rows, driving data lines D0, D1, ... Dn is arranged in row, the luminescence unit of a pixel is positioned at each joining of sweep circuit line L and driving data lines D, sweep circuit line L is connected with the sweep circuit line control circuit, this sweep circuit line control circuit is a fpga chip, it comprises a shift register that does not illustrate, transmit a start dialing signal VSP in the synchronous mode of pulse clock signal VCK, with selection sweep circuit line L0 continuous in a scan period, L1..Ln, driving data lines D is connected with the driving data line control circuit, the driving data line control circuit is a fpga chip, the driving data line control circuit is given driving data lines D with the continuous handle of the capable sequential scan mode that is synchronized with sweep circuit line L corresponding to the electrical signal transfer of monochrome information, in the case, the driving data line control circuit is carried out the row order and is driven, go sequential scanning, so that simultaneously electric signal is offered the driving data lines of pixel luminescence unit, the driving data line control circuit is carried out the driving of some sequential in addition, it is to control its output signal by fpga chip in the driving data line control circuit that described some sequential drives, its output signal is not only relevant with its input signal, simultaneously relevant with the status signal that writes down in its chip, so that carry out a sequence scanning, an electric signal is provided to luminescence unit of selecting the pixel of row in the matrix type luminescence unit, and image display device comprises that driving of row order and some sequential drive.This device can be according to adjusting luminescence unit brightness and demonstration time, thereby control the color balance of whole display panel.
Fig. 2 is the time sequential routine figure of LED panel television image display device, start dialing signal VSP1 is written into sweep circuit line control circuit and delay circuit, after the start dialing signal VSP1 that receives input, the sweep circuit line control circuit is with the mode that is synchronized with pulse clock signal VCK continuous selection sweep circuit line L0, L1...Ln, so that monochrome information is written to the luminescence unit of pixel in the sweep circuit line, each pixel luminescence unit begins to carry out luminous corresponding to the monochrome information that writes wherein.Each bar driving data lines has the electric signal corresponding to 0 brightness in pulse clock signal VCK is the one-period of VCK=1 (noble potential), and electric signal corresponding to original brightness in being the one-period of VCK=0 (electronegative potential), pulse clock signal VCK is arranged, the electric signal of driving data line control circuit controlling and driving data line D.Start dialing signal postpones by delay circuit, pulse signal VSP2 is written into the control chip in the sweep circuit line drive circuit that is not illustrated, after start dialing signal VSP2 is received, this control chip and pulse clock signal VCK synchronous operation, when control chip is output as noble potential accordingly, select a sweep circuit line L, and the VCK=1 of pulse clock signal VCK (noble potential), as mentioned above, because in the one-period within the VCK=1, electric signal corresponding to 0 brightness writes driving data lines, the luminescence unit of pixel that then is connected to selected sweep circuit line is owing to the electric signal corresponding to 0 brightness extinguishes, by the time that writes corresponding to the electric signal of 0 brightness in the controlling and driving data line, determine the brightness value of this pixel luminescence unit.
Fig. 3 is the timing diagram of the pixel operation of LED panel television image display device, with reference to figure 3, this driving data lines in fact can with the sweep circuit line simultaneously be controlled to noble potential, and after writing monochrome information and finishing in the maintained one-period of this noble potential (frame), the luminescence unit of this pixel is still with luminous corresponding to a brightness value that is written to monochrome information wherein, before the monochrome information that is used for next cycle (frame) is written to the luminescence unit of this pixel, when driving data lines is controlled to electronegative potential, this luminescence unit is extinguished.During at moving image of demonstration, before this picture conversion, pixel along the profile of this picture that moves continues to show this moving image, the back reflection effect of human eye in addition, this will cause that the people who observes this image feels to make the image quality decrease that shows moving image as also showing this image in next frame.The present invention removes the back reflection sensation of human eye to introduce the technology of forcing to extinguish the pixel luminescence unit, can improve the display quality of moving image.
Fig. 4 is the equivalent circuit diagram of the luminescence unit of LED panel television image display device, the luminescence unit of each pixel that sweep circuit line L and driving data lines D joining form comprises a LED, PNP1 transistor as first active device, as PNP2 transistor and maintenance capacitor Cs of second active device, the brightness of each luminescence unit LED is determined by being carried on it current time.
Fig. 5 is a LED panel television image display device matrix type luminescence unit circuit part equivalent circuit diagram, comprise a plurality of sweep circuit line L (only illustrating 2 among the figure) in its device, be used for the luminescence unit in a scan period (frame) the selection pixel, and a plurality of driving data lines D (only illustrating 1 among the figure), be used to provide the monochrome information of this driven for emitting lights unit, the extension that this sweep circuit line L and driving data lines D are perpendicular to one another is so that arrange the luminescence unit of pixel on the independent joining of matrix.First active device 1 is by sweep circuit line L
0Control is corresponding to driving data lines D
0Monochrome information write and be included in this luminescence unit D
1Maintenance capacitor C s in, the corresponding monochrome information that writes among this maintenance capacitor C s, 2 controls of this active device are provided the magnitude of current among the luminescence unit LED.Selecting sweep circuit line L
0State in be added to driving data lines D by a electric signal (digital current potential) corresponding brightness information
0, carry out monochrome information to this luminescence unit D
1Write, selecting sweep circuit line L
1State in, mode of the same race will be carried out monochrome information to this luminescence unit D
3As active device 1 gated sweep circuitry lines L
0Do not have when selected, monochrome information still can be kept by Cs, and can make D1 keep original monochrome information, makes its light emission luminance value keep original state.
Claims (6)
1.LED panel television image display device, it is characterized in that pixel matrix circuit by LED, the sweep circuit line control circuit, delay circuit and Data Control line drive circuit are formed, the anode of described each luminescence unit of LED pixel matrix circuit is connected with the scan control line of sweep circuit line control circuit by the anode active switch, the negative electrode of each luminescence unit of LED pixel matrix circuit is connected with the driving data lines of data system line drive circuit by the negative electrode active switch, described delay circuit is connected with the scan control line control circuit, wherein, the sweep circuit line control circuit is used for the luminescence unit in a scan period selection pixel, the Data Control line drive circuit is used to provide the monochrome information that drives this luminescence unit, the brightness of described luminescence unit is by the current lead-through time decision that loads thereon, under the sweep frequency of setting, the control luminescence unit is from lighting luminance to the required time of extinguishing state, thus the mean flow rate of control luminescence unit.
2. LED panel television image display device according to claim 1, it is characterized in that described driving data line control circuit execution row order drives, go sequential scanning, so that simultaneously electric signal is offered the driving data lines of pixel luminescence unit, the driving data line control circuit is carried out the driving of some sequential in addition, it is by its output signal of control in the driving data line control circuit that described some sequential drives, its output signal is not only relevant with its input signal, simultaneously relevant with the status signal that writes down in its chip, so that carry out a sequence scanning, an electric signal is provided to luminescence unit of selecting the pixel of row in the matrix type luminescence unit.
3. LED panel television image display device according to claim 1, it is characterized in that described LED picture element matrix be every square metre of density greater than 110,000 etc. the matrix of pixel spacing.
4. LED panel television image display device according to claim 1, it is characterized in that described sweep circuit line control circuit selects the scan control line again in definite time period scan period, from described driving data lines, be brightness value that zero Pixel Information writes this pixel, to extinguish the luminescence unit of described pixel.
5. LED panel television image display device according to claim 1 is characterized in that described anode active switch is the PNP triode, and the anode of pixel luminescence unit is connected with the collector of PNP triode, and the scan control line is connected with the base stage of PNP triode; Described negative electrode active switch is the PNP triode, the negative electrode of pixel luminescence unit is connected with the emitter of PNP triode, driving data lines is connected with the PNP transistor base, also be provided with an electric capacity, the two ends of described electric capacity link to each other with collector with the base stage of described negative electrode PNP triode respectively, are used to control the current value of described luminescence unit.
6. according to the described LED panel of the arbitrary claim of claim 1 to 5 television image display device, it is characterized in that described sweep circuit line drive circuit, its received signal, this signal is used for the first synchronous vertical enabling pulse of a vertical clock signal of the described sweep circuit line of continuous selection, described sweep circuit line drive circuit also is used to receive by the cycle that the first vertical enabling pulse is postponed a definite frequency and obtains another and the synchronous enabling pulse of vertical clock pulse signal, by described sweep circuit line drive circuit and this sweep circuit line of the synchronous Continuous Selection of this vertical clock pulse signal, light the luminescence unit of respective pixel, by described circuitry lines driving circuit, the luminescence unit of having lighted was extinguished synchronously with this vertical clock pulse signal in a described cycle length.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010000046 CN101916542B (en) | 2010-01-05 | 2010-01-05 | Image display device of LED panel television |
| PCT/CN2010/070631 WO2011082558A1 (en) | 2010-01-05 | 2010-02-11 | Image display device for led panel television |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010000046 CN101916542B (en) | 2010-01-05 | 2010-01-05 | Image display device of LED panel television |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101916542A true CN101916542A (en) | 2010-12-15 |
| CN101916542B CN101916542B (en) | 2013-06-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010000046 Active CN101916542B (en) | 2010-01-05 | 2010-01-05 | Image display device of LED panel television |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101916542B (en) |
| WO (1) | WO2011082558A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107134221A (en) * | 2016-02-26 | 2017-09-05 | Psi株式会社 | Include the display device of microminiature light-emitting diode (LED) module |
| CN112789951A (en) * | 2018-09-28 | 2021-05-11 | 法雷奥照明公司 | Matrix light source for a motor vehicle |
| CN113012650A (en) * | 2021-03-05 | 2021-06-22 | 京东方科技集团股份有限公司 | Backlight driving method and device and display equipment |
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| US20060139256A1 (en) * | 2004-12-28 | 2006-06-29 | Tohoku Pioneer Corporation | Method and apparatus for driving light-emitting display panel |
| JP2006259573A (en) * | 2005-03-18 | 2006-09-28 | Seiko Epson Corp | Organic el device, drive method thereof, and electronic device |
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| CN1163671A (en) * | 1995-05-19 | 1997-10-29 | 菲利浦电子有限公司 | Display device |
| JP4092857B2 (en) * | 1999-06-17 | 2008-05-28 | ソニー株式会社 | Image display device |
| JP3743387B2 (en) * | 2001-05-31 | 2006-02-08 | ソニー株式会社 | Active matrix display device, active matrix organic electroluminescence display device, and driving method thereof |
| GB2388236A (en) * | 2002-05-01 | 2003-11-05 | Cambridge Display Tech Ltd | Display and driver circuits |
| KR100602356B1 (en) * | 2004-09-15 | 2006-07-19 | 삼성에스디아이 주식회사 | Light emitting display and driving method thereof |
| US20060164345A1 (en) * | 2005-01-26 | 2006-07-27 | Honeywell International Inc. | Active matrix organic light emitting diode display |
| JP2007200684A (en) * | 2006-01-26 | 2007-08-09 | Nippon Seiki Co Ltd | Lighting apparatus |
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- 2010-01-05 CN CN 201010000046 patent/CN101916542B/en active Active
- 2010-02-11 WO PCT/CN2010/070631 patent/WO2011082558A1/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20060139256A1 (en) * | 2004-12-28 | 2006-06-29 | Tohoku Pioneer Corporation | Method and apparatus for driving light-emitting display panel |
| JP2006259573A (en) * | 2005-03-18 | 2006-09-28 | Seiko Epson Corp | Organic el device, drive method thereof, and electronic device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107134221A (en) * | 2016-02-26 | 2017-09-05 | Psi株式会社 | Include the display device of microminiature light-emitting diode (LED) module |
| CN107134221B (en) * | 2016-02-26 | 2020-01-21 | 三星显示有限公司 | Display device including subminiature light emitting diode module |
| CN112789951A (en) * | 2018-09-28 | 2021-05-11 | 法雷奥照明公司 | Matrix light source for a motor vehicle |
| US11903111B2 (en) | 2018-09-28 | 2024-02-13 | Valeo Vision | Matrix light source for a motor vehicle |
| CN113012650A (en) * | 2021-03-05 | 2021-06-22 | 京东方科技集团股份有限公司 | Backlight driving method and device and display equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2011082558A1 (en) | 2011-07-14 |
| CN101916542B (en) | 2013-06-12 |
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