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OLED array passive driving circuit

A driving circuit and column driver technology, applied in the field of circuits, can solve the problems of high cost, large power consumption, complex structure of active driving mode, etc., and achieve the effect of low cost and simple circuit structure

Inactive Publication Date: 2018-04-27
重庆秉为科技有限公司
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Problems solved by technology

The structure of the passive method is relatively simple, and the apparent driving current determines the gray scale. It is mainly used in small-sized products, and its resolution and image quality are good. In the prior art, large-sized products have large power consumption and short life. Generally, the active driving method is adopted, because the active current rectification is better than the passive method; but the structure of the active driving method is complicated and the cost is high

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Embodiment 1

[0015] Such as figure 2 As shown, the OLED display is composed of many pixels, and these pixels are arranged in a matrix in rows and columns; when displaying an image, it is scanned by row or by column. This article takes line scanning as an example to illustrate the timing relationship of driving a passive monochrome n-row m-column OLED screen. If the light-emitting element intersecting the x-th row and the y-th column is to emit light (turn on), it is only necessary to close the y-th column select switch of the column driver circuit, output a high level, and make the x-th row output of the row scanning circuit low Level, the light emitting principle of other light-emitting elements on the screen is similar, figure 1 It is a timing diagram of the scanning principle of a monochrome n-row m-column OLED screen. Wherein TFRM is the frame period, TLINE is the line scanning period, after determining the frame frequency fFRM, the time of one frame is determined, TFRM=1 / fFRM; the ...

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Abstract

The invention discloses an OLED array passive driving circuit. The circuit comprises two row drivers, four column drivers and one OLED display. The OLED display comprises 128 COM ports of COM1 to COM64, and COM65 to COM128. The two row drivers are connected in series. One row driver is connected to the COM1 to COM64, and the other row driver is connected to the COM65 to COM128. The OLED display also comprises 256 SG ports of SG1 to SG64, SG65 to SG128, SG1B to SG64B, and SG65B to SG128B. The four column drivers are connected to four groups of SG ports of the SG1 to SG64, SG65 to SG128, SG1B toSG64B, and SG65B to SG128B. In the invention, the OLED array driving circuit is used to realize array driving of a passive OLED so as to realize the array driving of the passive OLED, which is good for realizing a large size of the ILED or a large display screen design; and cost is low and a circuit structure is simple.

Description

technical field [0001] The invention relates to the field of circuits, in particular to an OLED array passive drive circuit. Background technique [0002] At present, in the field of optoelectronic display, CRT has come to an end, and LCD is at the peak of development. Compared with LCD industry with mature technology, complete industrial chain and large scale, OLED is still in the initial stage of development. Its advantages can be seen from the technology In terms of technology and industry, OLED is very thin and light, and the thickness can be thinner than LCD; because it does not need backlight for active light, OLED has a wide viewing angle, which is generally considered to be close to 180 degrees; and has Power saving, low temperature resistance, the performance at low temperature is far better than LCD; fast response, the image refresh rate is almost 100 to 1000 times that of LCD; in addition to the fundamental improvement of image quality, it also has good shock resi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/3216
CPCG09G3/3216
Inventor 周亚贤卢彦伊
Owner 重庆秉为科技有限公司
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