CN200953217Y - High brightness and high resolution ratio LED display screen and driving circuit thereof - Google Patents
High brightness and high resolution ratio LED display screen and driving circuit thereof Download PDFInfo
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- CN200953217Y CN200953217Y CNU2006201211320U CN200620121132U CN200953217Y CN 200953217 Y CN200953217 Y CN 200953217Y CN U2006201211320 U CNU2006201211320 U CN U2006201211320U CN 200620121132 U CN200620121132 U CN 200620121132U CN 200953217 Y CN200953217 Y CN 200953217Y
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Abstract
A LED display screen with high luminance and high resolution is provided, which is composed of a plurality of tricolor diode pixel point matrixes, and is characterized in that: the pixel point which is made of tricolor diodes and arranged in matrix owns four LED diodes. The utility model has advantages of that: in the large angle of view, the desirable uniformity of luminosity, the high resolution, the convenience of machining, and the low cost as well as the high reliability, etc.
Description
Technical field
The utility model relates to a kind of light emitting diode (LED) display screen, specifically, the utility model relates to a kind of high brightness, high-resolution LED display and driving circuit thereof.
Background technology
Brightness, gray shade scale and the resolution of colour light-emitting diode (LED) display screen are the principal elements of digital picture quality quality.
For the brightness of light emitting diode (LED) display screen, the brightness requirement difference under the different operating condition is divided into three kinds of open air, indoor and semi-outdoors.
1, the open air requires brightness 6000-7000cd/m in the sun
2
2, indoor 500--800cd/m
2
3, semi-outdoor 3800--4000cd/m
2So-called semi-outdoor is meant not by the sunlight direct irradiation, and the non-the brightest moment at noon.
General used colour light-emitting diode is formed a pixel by the diode of R, G, three kinds of colors of B.For full-color white balance, R30%, G60%, B10%.The brightness that the light emitting diode of red at present (R), green (G), blue (b) three kinds of colors can reach is as follows:
R400-600
G1500
B600，
Can only accomplish 1800cd/m for the highest white brightness that RGB three manages the unit pixel point that constitutes
2Indoor needs are only satisfied in this brightness, can not satisfy semi-outdoor and outdoor needs far away.
About gray shade scale, the gray shade scale of existing colour light-emitting diode (LED) display screen develops into 256 grades of gray scales from 16 grades of original gray scales, has also reserved 1024 grades of gray scale interfaces, on gray shade scale, LED display can satisfy the requirement as digital display terminal.
About resolution, improving aspect the LED lamp density, by increasing the restriction that display effect that pixel (LED lamp) density on the unit area improves LED display is subjected to LED lamp physical size.Circle lamp and its control corresponding electronic component all have the certain physical size, and when density acquired a certain degree, it was impossible to reduce again, and the minimum lamp that can accomplish at present is apart from being 12mm.
Summary of the invention
Fundamental purpose of the present utility model is to provide a kind of brightness to reach high brightness, high-resolution LED display and the driving circuit thereof of half indoor requirement, resolution raising.
The purpose of this utility model is to be achieved in the following manner:
In order to solve the weak point in the above-mentioned background technology, the utility model provides a kind of high brightness, high-resolution LED display,
For achieving the above object, the technical solution adopted in the utility model is:
A kind of high brightness, high-resolution LED display, comprise driving circuit, the pixel that described LED display is made up of the three primary colours diode of a plurality of arranged constitutes, and it is characterized in that: the pixel that the three primary colours diode of described arranged is formed is to be made of four LED diodes.
Except that above-mentioned essential features, in specific implementation process, also can replenish following technology contents:
Described high brightness, high-resolution LED display is characterized in that: four diodes of a pixel of described formation are R1, G, four diodes of B, R2, and described four diodes are positioned at four jiaos of cell matrix that the length of side is a.
Described high brightness, high-resolution LED display is characterized in that: described be positioned at the length of side be a four jiaos of cell matrixs four diodes put in order be two red diode R1, R2 be positioned at cell matrix on the angle point.
Described high brightness, high-resolution LED display is characterized in that: the length of side a of described rectangle is 10～16mm, is preferably 12mm.
The utility model also provides a kind of described scan drive circuit.
A kind of driving circuit that is used for the driving method of described LED display, comprise: microprocessor, horizontal drive circuit, column drive circuit, storer, it is characterized in that: in the column scan driving circuit, be provided with a plurality of gray-scale generators, the input end of described a plurality of gray-scale generators connects the data bus of microprocessor, the output of gray-scale generator connects sealing in of a plurality of series connection and goes out the constant current chip, each constant current chip has a plurality of output terminals, and described output terminal respectively is listed as LED of the same name by the diode connection respectively.
The driving circuit of described LED display is characterized in that: the model of described gray-scale generator is 9705.
The driving circuit of described LED display is characterized in that: seal in and the model that goes out the constant current chip is 5026 or 9729.
The utility model against existing technologies, its advantage is:
1, the utility model is compared with the perforation plug-in type light emitting diode (LED) display screen with dynamic pixel control technology, and it is big to have a visual angle, the luminosity good uniformity, and easy making process, cost is low, the reliability advantages of higher.
2. the utility model is compared with conventional Surface Mount list core top formula light emitting diode (LED) display screen, have under the identical situation of luminotron density, and the resolution height, luminotron density is low under the identical situation of resolution, thus low cost and other advantages.
3, the utility model is compared with the three-in-one top of Surface Mount formula light emitting diode (LED) display screen, has the luminosity good uniformity, the advantage that image resolution ratio is high.
4, the LED display that provides of the utility model, under the constant situation of LED lamp quantity, the vision dot density increases by 4 times, improves the LED display of video image quality.
For feature of the present utility model, effect are had further understanding, enumerate specific embodiment now and be described with reference to the accompanying drawings as follows.
Description of drawings
Fig. 1 is the utility model RGBR display screen LED pipe synoptic diagram of arranging.
Fig. 2 is the utility model 1/8 scanning sequence figure.
Fig. 3 is the driving circuit structure figure of the utility model RGBR.
Fig. 4 is the column drive circuit structural drawing of the utility model sweep circuit.
Embodiment
The utility model shows needs for improving the brightness and the resolution of existing panchromatic LED display to adapt to semi-outdoor, and a kind of high brightness, high-resolution LED display are provided.Described high brightness, high-resolution LED display are identical with existing three-primary color LED display screen, and the pixel of being made up of the three primary colours diode of a plurality of arranged constitutes.The utility model is for improving brightness, and the pixel that the three primary colours diode of described arranged is formed is to be made of four LED diodes, and its structure as shown in Figure 1.Four diodes of a pixel of described formation are R1, G, four diodes of B, R2, and described four diodes are positioned at four jiaos of cell matrix that the length of side is a.Four diodes put in order be two red diode R1, R2 be positioned at cell matrix on the angle point.So arrange, the rectangular pixels point that four LED pipes can being divided are arbitrarily constituted includes, 2R (red), 1G (green), 1B (orchid), and 2R lay respectively at cell matrix on the angle point.In four-picture-element type dynamic pixel display screen, in order to ensure the equal and opposite in direction of each pixel in dynamic pixel, luminotron is for equidistantly arranging.
The length of side a of described cell matrix is 10～16mm, is preferably 12mm.
The utility model constitutes a pixel by four light emitting diodes, each pixel comprises that the light emitting diode of redness, green and blue three kinds of colors forms, wherein red light emitting diodes is two, green LED and blue LED respectively are one, two red light emitting diodes are controlled respectively by two paths of signals, in the light emitting diode of each pixel any one light emitting diode be neighbor in a light emitting diode.
Referring to accompanying drawing 1, wherein, R represents red light emitting diodes, B represents blue LED, and G represents green LED, is a module with RRBG, perhaps be referred to as a pixel, according to the display that module of the present utility model forms, 4 adjacent light emitting diodes are RRBG arbitrarily, therefore, adopt control method described in the utility model, with obtaining higher luminous intensity under the constant power, keeping to reduce use power significantly under the big situation of luminous intensity.In Fig. 1, the pixels 1 that four diodes are formed, when two light emitting diodes that two light emitting diodes in its left side participate in closing on, its dynamic pixel remains RRGB, as can be seen, any four light emitting diodes have all formed described RRGB dynamic pixel from accompanying drawing.
Under the situation of rated power, R is generally 400 milli candle lights (mcd), G is generally 1600 milli candle lights (mcd), and B is generally 800 milli candle lights (mcd), and the ratio between the RGB of formation white light is preferably R30%, G60%, B30%, form such ratio, adopting R is 2 * 400 milli candle lights (mcd), and G is 1600 milli candle lights (mcd), B is 200 milli candle lights (mcd), form 4 light emitting diodes and form a picture element, the final picture element ratio that forms is R30.76%, G61.53%, B7.69%, thus obtain reaching semi-outdoor brightness 3800--4000cd/m
2Requirement.Equidistantly arrange four diodes of RRGB with the minimum LED spacing 12mm that can reach, then four RRGB diode area occupied are 24 * 24=576mm
2, then every square meter has 1.75 * 10
3Individual pixel, the brightness of a picture element of being made up of 4 light emitting diodes are 2 * 400+1600+200=2600 milli candle light (mcd), and the brightness of every square meter can reach 2600 milli candle lights (mcd) * 1.75 * 10
3=4550 candle lights (cd) meet semi-outdoor 3800--4000cd/m
2The high brightness requirement.
For improving resolution, the utility model also provides a kind of scan method of four diode pixel points of RGBR of described arranged: the driving method of described LED display, comprise that line scanning driving and column scan drive, described line scanning driving and column scan drive to be driven by four groups of line scanning drivings with a timing difference and column scan respectively according to the order of the R1, the G that constitute a pixel, B, R2 and scan.It is the cycle of lining by line scan that described four groups of line scanning drivings and column scan drive the time difference of carrying out turntable driving.
Fig. 2 is the utility model 1/8 scanning sequence figure.Consider the brightness requirement of semi-outdoor, the utility model adopts 1/8 scan mode, and promptly in one-period, with the LED pipe conducting in turn of 8 same colors that rank, when the scan period was 1/60 second, the maximum ON time of each diode was 1/8*60 second.And the maximum ON time that drives each diode by column scan is divided into 256 parts, to realize the 256 gray shade scales control of LED pipe.
Fig. 3, Fig. 4 are the driving circuit structure figure of the utility model RGBR and the column drive circuit structural drawing of sweep circuit.
The driving circuit that is used for described LED display provided by the utility model comprises: microprocessor, horizontal drive circuit, column drive circuit, storer etc.In the column scan driving circuit, be provided with a plurality of gray-scale generators, the input end of described a plurality of gray-scale generators connects the data bus of microprocessor, the output of gray-scale generator connects sealing in of a plurality of series connection and goes out the constant current chip, each constant current chip has a plurality of output terminals, and described output terminal respectively is listed as LED of the same name by the diode connection respectively.The model of described gray-scale generator is 9705.The described model that seals in and go out the constant current chip is 5026 or 9729.
As aforementioned, because the utility model is when the luminous intensity of four light emitting diodes of control RRGB, the luminous intensity index of the light emitting diode of available optimum efficiency on the binding isotherm, therefore, the different dynamic pixel that makes up respectively can both obtain best white light effect.
As a kind of selectivity utility model, scheme described in the utility model does not comprise the combination of four light emitting diodes beyond two red light emitting diodes, for example, the combination of two blue LEDs, a red light emitting diodes, a green LED or two green LEDs, a red light emitting diodes, a blue LED.
Claims (7)
1, a kind of high brightness, high-resolution LED display, the pixel of being made up of the three primary colours diode of a plurality of arranged constitutes, and it is characterized in that: the pixel that the three primary colours diode of described arranged is formed is to be made of four LED diodes.
2, high brightness according to claim 1, high-resolution LED display, it is characterized in that: four diodes of a pixel of described formation are R1, G, four diodes of B, R2, and described four diodes are positioned at four jiaos of cell matrix that the length of side is a.
3, high brightness according to claim 2, high-resolution LED display is characterized in that: described be positioned at the length of side be a four jiaos of cell matrixs four diodes put in order be two red diode R1, R2 be positioned at cell matrix on the angle point.
4, high brightness according to claim 2, high-resolution LED display, it is characterized in that: the length of side a of described rectangle is 10～16mm, is preferably 12mm.
5, a kind of driving circuit that is used for the driving method of described LED display, comprise: microprocessor, horizontal drive circuit, column drive circuit, storer, it is characterized in that: in the column scan driving circuit, be provided with a plurality of gray-scale generators, the input end of described a plurality of gray-scale generators connects the data bus of microprocessor, the output of gray-scale generator connects sealing in of a plurality of series connection and goes out the constant current chip, each constant current chip has a plurality of output terminals, and described output terminal respectively is listed as LED of the same name by the diode connection respectively.
6, according to the driving circuit of the described LED display of claim 5, it is characterized in that: the model of described gray-scale generator is 9705 integrated circuit.
7, according to the driving circuit of the described LED display of claim 5, it is characterized in that: seal in and the model that goes out the constant current chip is 5026 or 9729 integrated circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201211320U CN200953217Y (en) | 2006-07-13 | 2006-07-13 | High brightness and high resolution ratio LED display screen and driving circuit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201211320U CN200953217Y (en) | 2006-07-13 | 2006-07-13 | High brightness and high resolution ratio LED display screen and driving circuit thereof |
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| CN200953217Y true CN200953217Y (en) | 2007-09-26 |
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| CNU2006201211320U Expired - Fee Related CN200953217Y (en) | 2006-07-13 | 2006-07-13 | High brightness and high resolution ratio LED display screen and driving circuit thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102062578A (en) * | 2010-12-13 | 2011-05-18 | 西安交通大学 | Handheld optical target for measuring visual coordinate and measuring method thereof |
-
2006
- 2006-07-13 CN CNU2006201211320U patent/CN200953217Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102062578A (en) * | 2010-12-13 | 2011-05-18 | 西安交通大学 | Handheld optical target for measuring visual coordinate and measuring method thereof |
| CN102062578B (en) * | 2010-12-13 | 2012-11-28 | 西安交通大学 | Handheld optical target for measuring visual coordinate and measuring method thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |