GOA Circuit Shared Pull-Down Holding Circuits
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Solution Overview
Problem
The existing GOA circuit design has inefficiencies due to independent pull-down holding circuits in each stage, leading to increased size and power consumption, and lower functional efficiency.
Innovation Solution
The GOA circuit design shares pull-down holding circuits between adjacent stages, utilizing shared control and holding circuits to alternately control voltage levels and reduce TFT count, thereby decreasing design space and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If independent pull-down holding circuits are used in each GOA stage, then each stage can function independently, but the circuit size and power consumption increase
Solution Approach 1:
The patent merges pull-down holding circuits from adjacent GOA stages into a shared resource. Specifically, the pull-down holding circuit of stage N is shared with stage N+1, allowing both stages to utilize the same holding circuitry alternately. This merging approach reduces the total number of pull-down holding circuits from one per stage to one shared circuit for every two stages, directly addressing the contradiction by reducing circuit size while maintaining independent operation capability through alternating activation.
Solution Approach 2:
The patent implements dynamic control of the shared pull-down holding circuit through alternating activation based on stage number and timing. Even-numbered stages activate the shared holding circuit during their operation, while odd-numbered stages activate it during their operation. This dynamic time-multiplexing approach ensures that each stage receives dedicated holding circuit functionality when needed, while the physical circuit exists as a shared resource, resolving the contradiction between independent operation and circuit size reduction.
2Reliability
If independent pull-down holding circuits are used in each GOA stage, then each stage has dedicated functionality, but power consumption increases
Solution Approach 1:
The patent combines multiple pull-down holding circuits into a single shared circuit that serves multiple GOA stages. By merging the holding circuit functionality for stages N and N+1 into one physical circuit, the power consumption associated with maintaining and operating separate holding circuits is reduced. The shared circuit is activated alternately for different stages, ensuring that dedicated functionality is provided when needed while reducing overall power consumption through resource sharing.
Solution Approach 2:
The shared pull-down holding circuit is designed to perform multiple functions by serving different GOA stages at different times. The same physical circuit infrastructure is used to provide pull-down holding functionality for both even and odd numbered stages, making the circuit universal rather than dedicated to a single stage. This multi-functionality approach reduces power consumption by eliminating redundant circuit operations while maintaining the ability to provide dedicated holding functionality to each stage when required.
3Reliability
If more TFT components are used in pull-down holding circuits of each stage, then circuit functionality is complete, but design space increases
Solution Approach 1:
The patent merges the TFT components of pull-down holding circuits from multiple stages into a shared set of components. Instead of having complete pull-down holding circuits with full TFT complements in each stage, the patent creates a shared holding circuit that is activated alternately. This merging reduces the total number of TFT components required in the GOA circuit while maintaining complete functionality during each stage's active period, directly addressing the contradiction between functionality and design space occupation.
Data Source
AI summary
The present invention discloses a GOA circuit, comprising a plurality of GOA units which are cascade coupled, and the Nth stage GOA unit is employed to control charge to the Nth level scan line G(N), and the pull-down holding circuit of the Nth stage GOA unit comprises a Nth control circuit, a Nth holding circuit and a Nth shared circuit; the pull-down holding circuit of the (N+4)th stage GOA unit comprises a (N+4)th control circuit, a (N+4)th holding circuit and a Nth shared circuit; a first control end Q(N) of the Nth control circuit and a second control end receiving the first control signal regulates and controls a voltage level of the output end P(N) thereof; a first control end Q(N+4) of the (N+4)th control circuit and a second control end receiving the low frequency control signal regulates and controls a voltage level of the output end P(N+4) thereof.