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GOA circuit

A circuit and low-voltage technology, applied in the display field, to achieve the effect of solving the Q point potential maintenance and wide pulse GOA signal output

Active Publication Date: 2017-11-24
SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the object of the present invention is to provide a kind of GOA circuit, solves the Q point potential maintenance problem

Method used

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Embodiment Construction

[0040] see figure 1 and figure 2 , this preferred embodiment of the present invention is mainly made of 18 TFTs and a capacitor Cbt, and the connection relationship between the circuits is as follows figure 1 shown. Among them, CLK and CLKB are AC power sources with opposite waveforms, VGH, VGL1 and VGL2 are DC power sources, and STV is a start pulse (start pulse) trigger signal, which is required for starting the first-stage GOA unit. The specific waveform and voltage relationship of each signal in the GOA circuit can be shown in the table below. Nodes N, Q, QB, Cout(n-1), Cout(n), Cout(n+1), G(n), etc. are important nodes in the circuit.

[0041]

[0042] Other parameters of the panel applying this preferred embodiment can be set as follows: for FHD (full high definition) resolution, the number of row scanning lines is 1080, the number of clock signals (CK number) is 2 (CLK and CLKB), and the clock cycle ( CK period) is 336 milliseconds, the duty cycle (Duty cycle) i...

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Abstract

The invention relates to a GOA (Gate Driver on Array) circuit. The GOA circuit includes a plurality of cascaded GOA units, wherein n is set as a natural number, and the nth level of GOA unit in charge of outputting the nth level of horizontal scanning signal includes a pull up unit (10), a pull up control unit (20), a download unit (30), a pull down unit (40), a pull down maintenance unit (50) and a bootstrap capacitor (Cbt); the pull up unit (10) is connected with the nth level of horizontal scanning signal output end (G(n)), the first node (Q), the second node (K) and the first clock signal (CLKB); and the pull up control unit (20) is connected with the first node (Q), the second node (K), the third node (N), and the second clock signal (CLK), the current-level level-transmission signal output end (Cout(n)), and the previous-level level-transmission signal output end (Cout(n-1)) or a start pulse (STV). The GOA circuit can effectively solve the Q point potential maintenance problem, and can realize broad pulse GOA signal output.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a GOA circuit. Background technique [0002] Organic light-emitting diode (OLED) display devices have self-illumination, low driving voltage, high luminous efficiency, short response time, high definition and contrast, nearly 180° viewing angle, and wide operating temperature range, which can realize flexible display and large-area full-color display And many other advantages, it is recognized by the industry as the display device with the most development potential. According to the driving method, OLED display devices can be classified into two categories: passive matrix OLED (Passive Matrix OLED, PMOLED) and active matrix OLED (Active Matrix OLED, AMOLED). Among them, AMOLED has pixels arranged in an array, belongs to the active display type, has high luminous efficiency, and is usually used as a high-definition large-size display device. [0003] At present, the driving of...

Claims

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Application Information

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IPC IPC(8): G09G3/3225
CPCG09G3/3225G09G3/3266G09G3/3674G09G2310/0286G09G2310/08G09G2310/06G09G2320/0204G11C19/184G11C19/28
Inventor 薛炎韩佰祥
Owner SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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