Gate Driving Circuit Auxiliary Load Compensation
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Solution Overview
Problem
Display devices with non-uniform load distribution across gate lines experience abnormal driving phenomena and image quality degradation due to load imbalances in gate driving circuits, particularly in heterogeneous display areas with varying pixel connections.
Innovation Solution
A gate driving circuit with auxiliary or dummy loads connected to stages in non-display areas to equalize load distribution, including capacitors and resistors formed from the same material as transistors, and strategically placed to compensate for reduced pixel loads in heterogeneous structures, ensuring uniform output characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display area shape is diversified to implement flexible product design, then adaptability is improved, but load balance deteriorates
Solution Approach 1:
The patent applies local quality by introducing auxiliary loads specifically at stages with reduced pixel connections (heterogeneous areas) rather than uniformly across all stages. This targeted approach compensates for local load imbalances caused by diversified display shapes while maintaining the overall system's adaptability.
Solution Approach 2:
The patent changes the load parameter by adding auxiliary capacitive loads to specific stages. This parameter modification equalizes the total load across all stages despite variations in pixel connections, thereby maintaining load balance while preserving display area shape diversity.
2Stability of the object's composition
If auxiliary loads are added to compensate for load imbalance, then load balance is improved, but device complexity increases
Solution Approach 1:
The patent uses homogeneity by forming auxiliary loads from the same material and using the same manufacturing process as the pixel electrodes. This ensures that the auxiliary loads are chemically and physically homogeneous with existing circuit elements, simplifying fabrication despite the added functional complexity.
Solution Approach 2:
The patent applies universality by using the same electrode material and formation process for both pixel electrodes and auxiliary loads. This multi-functional approach allows a single material system to serve multiple purposes: displaying images and providing load compensation.
3Ease of manufacture
If auxiliary loads are formed from the same material as transistors, then ease of manufacture is improved, but material selection flexibility deteriorates
Solution Approach 1:
The patent merges the formation of auxiliary loads with the existing pixel electrode fabrication process. By combining these two functions into a single manufacturing step using the same material deposition process, the patent achieves ease of manufacture without requiring separate material selection or additional fabrication complexity.
Data Source
AI summary
A display device according to an embodiment of the present disclosure comprises a display panel including a display area having a plurality of pixels connected to a plurality of gate lines, a gate driving circuit in a non-display area adjacent to the display area and including a plurality of stages supplying a gate signal to the plurality of gate lines, and an auxiliary load connected to at least one stage of the plurality of stages in the non-display area in which a number of the plurality of pixels which are connected to at least two gate lines among the plurality of gate lines varies. Therefore, the load applied to the output node of the gate driving circuit is uniformly adjusted so that a screen abnormality of the display device may be suppressed.