Shift register and drive method thereof

A shift register, low-potential technology, applied in static memory, digital memory information, instruments, etc., can solve the problems that cannot be applied to various driving methods of flat-panel display devices, and that shift registers cannot realize various types and methods of shifting. Bit and other issues, to achieve the effect of low-level trigger type signal shift and overall shift

Active Publication Date: 2016-05-04
WUHAN TIANMA MICRO ELECTRONICS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen from this that the shift register in the prior art cannot realize multiple types and multiple modes of shifting, and thus cannot be applied to various driving modes of flat panel display devices.

Method used

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  • Shift register and drive method thereof
  • Shift register and drive method thereof
  • Shift register and drive method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Embodiment 1 of the present invention provides a shift register, such as image 3 Shown is the specific circuit structure of the shift register.

[0039]In Embodiment 1 of the present invention, the shift register includes: a first module 11, configured to generate a first voltage signal according to a first reference voltage and a second reference voltage in response to an input signal and a first control signal, and the input signal is When the potential is high, the first voltage signal becomes low potential under the trigger of the first control signal. The second module 12 is configured to generate a second voltage signal according to the input signal and the first reference voltage signal in response to the first voltage signal and the second control signal; when the input signal is at a low potential, the The second voltage signal becomes a low potential under the trigger of the second control signal; the third module 13 is configured to generate a third voltage...

Embodiment 2

[0078] Embodiment 2 of the present invention provides a shift register on the basis of Embodiment 1, such as Figure 5 Shown is the specific circuit structure of the shift register.

[0079] The difference from Embodiment 1 is that the first module 21 of the shift register is also used to respond to a third control signal, and when the input signal is at a low potential, the first voltage signal is controlled by the third control signal. When the signal is triggered, it becomes a high potential; the third control signal is a clock signal with the same frequency as the first control signal.

[0080] Specifically, the third control signal is the second clock signal CK.

[0081] Wherein, on the basis of the circuit structure of the first embodiment, the first module 21 further includes a fourth switching transistor T4 coupled between the second switching transistor T2 and the second node N2, and the fourth switching transistor T4 The third control signal CK is input to the gate...

Embodiment 3

[0106] Embodiment 3 of the present invention provides a shift register on the basis of Embodiment 2, such as Figure 8 Shown is the specific circuit structure of the shift register.

[0107] The difference from the second embodiment is that the first control signal of the first module 31 of the shift register is the second clock signal CK, and the fourth control signal of the third module 33 of the shift register is the second clock signal CK, and, in the third module 33, the second electrode of the ninth switching transistor is electrically connected to the second reference voltage VGL.

[0108] Below, according to Figure 9 The sequence diagram in Figure 8 The working process of the shift register shown in different stages is further described.

[0109] specific, Figure 9 The input signal IN in is a high-level trigger type signal, and the shift register implements a 1:1 overlap shift.

[0110] At time T1, the input signal IN is at a low potential, the first switching ...

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PUM

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Abstract

The invention discloses a shift register and a drive method thereof. The potential changes of input signals of the shift register can be controlled by a first control signal and a second control signal respectively, so that high level trigger type signal shift and low level trigger type signal shift can be realized by the shift register. Besides, the first control signal and the second control signal are clock signals with the same frequency, integral shift of the signals on the timing sequence can be realized and overlapping shift of the signals on the timing sequence and at different proportions can be realized by setting the different triggering time of the first control signal and the second control signal, that is shift of different manners is realized, so that the shift register can be suitable for various drive modes of flat panel display devices.

Description

technical field [0001] The present invention relates to the technical field of display devices, and more specifically, to a shift register and a driving method thereof. Background technique [0002] In digital circuits, a shift register (shiftregister) is a flip-flop-based device that operates at several identical time pulses, data is input into the device in parallel or serial, and each time pulse is sequentially Shift one bit left or right, output on output. [0003] Existing flat panel display devices include liquid crystal (LCD) display devices, light emitting diode (LED) display devices and organic light emitting diode (OLED) display devices, etc., all of which need to transmit their driving control signals through shift registers. [0004] However, most of the existing shift registers are aimed at a specific driving mode, and thus can only realize signal shifting of a specific type and a specific mode. Such as figure 1 shown in the shift register, combined with fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/20G11C19/28
CPCG09G3/2077G11C19/28
Inventor 邹文晖钱栋孙伯彰吴桐李玥
Owner WUHAN TIANMA MICRO ELECTRONICS CO LTD
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