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Column control circuit of organic electroluminous display screen

A display screen and luminescent technology, applied in the direction of electroluminescent light source, electric light source, light source, etc., to achieve the effects of improving transmission utilization, increasing display frame frequency, and reducing brightness loss

Inactive Publication Date: 2008-04-23
SHANGHAI UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0032] Therefore, using figure 1 and figure 2 With the control circuit method shown, the brightness loss exceeds 1 / 4, and the transmission utilization rate is less than 60%

Method used

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  • Column control circuit of organic electroluminous display screen
  • Column control circuit of organic electroluminous display screen
  • Column control circuit of organic electroluminous display screen

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0048] A preferred embodiment of the present invention is described in detail as follows in conjunction with accompanying drawing:

[0049] This embodiment is to figure 1 The lock-in signal latch(25) and zero-clearing signal clrn(26) in the traditional OLED column control circuit shown in the figure are changed to synchronous signals, and the serial clock signal cp(21) is changed to a global clock signal and renamed to clk(41) , add a serial enable signal cdena (42), when the signal is active high, allow the serial lock-in signal cdin (22), add a temporary register (31) and a selector (32), and add a temporary Lock signal latch1 (43), temporary register (31), selector (32) and temporary lock signal latch1 (43) constitute one-level temporary storage structure (33), as image 3 shown.

[0050] exist image 3 Among them, the serializer (11) is a multi-group multi-bit band enable register, and multiple registers share the same clock terminal to access the global clock signal cl...

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Abstract

This invention relates to a line control circuit of an organic EL display screen, which applies a first grade buffer storage structure, that means to increase buffer storages and selectors and uses a synchronous way on the basis of a traditional line data serial transmission circuit on a screen to effectively reduce the loss of brightness in scanning and increase the frame frequency. Under the gray of 256 stage, when the scan circuit applies ''128-1-64-4-16-8-32-2''weight value series, the brightness loss reduces 40% and the transmission rate increases 20%.

Description

technical field [0001] The invention belongs to a display screen system circuit, in particular to a column control circuit of an organic electroluminescent display screen. A synchronous temporary register is added to the column control circuit of the OLED (Organic Electroluminescent Device) display screen to improve the scanning efficiency of the display and reduce the loss of brightness during scanning. Background technique [0002] With the rapid development of VLSI (Large Scale Integrated Circuit) and new display devices, people pay more and more attention to the application of OLED (Organic Electroluminescent Device) in the display field, and corresponding OLED display device driver chips appear accordingly. The requirements for display driver chips with rich functions, superior performance and convenient application are increasingly strong. [0003] The display data of the traditional OLED flat panel display is transmitted from the controller to the display panel by se...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/30G09G3/32G09G3/20H05B33/08H05B33/14G09G3/3275H05B44/00
Inventor 冉峰陈章进卜东生蔡俊姜玉稀郑昌陆
Owner SHANGHAI UNIV
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