Display Substrate Pixel Circuit Integration for Narrower Borders
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing pixel circuits require multiple gate driving units for threshold voltage compensation and signal writing-in, which hinders border reduction.
Innovation Solution
A display substrate design that integrates a plurality of rows of pixel circuits with shared control signal lines, including first and second light emitting control circuits, reset circuits, and energy storage circuits, allowing at least two rows to be driven by a single control signal line, thereby reducing the number of gate driving units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple groups of gate driving units are used to provide various control signals for threshold voltage compensation and signal writing-in, then the compensation effect is improved, but the border width increases
Solution Approach 1:
The patent merges the functions of multiple gate driving units into a single integrated gate driving unit. This unit contains multiple scanning signal generating circuits that can sequentially generate different scanning signals (first scanning signal for threshold voltage compensation, second scanning signal for signal writing-in) and output them to the same control signal line, thereby eliminating the need for multiple separate gate driving units and reducing border width while maintaining compensation effectiveness
Solution Approach 2:
The gate driving unit is designed with multi-functionality, where a single unit performs multiple functions that previously required separate units. The scanning signal generating circuits can switch between different scanning signal modes (compensation mode and writing-in mode) based on control signals, making the gate driving unit universal and capable of handling different operational phases without requiring dedicated hardware for each function
2Ease of operation
If multiple gate driving units are used to provide control signals, then the operational control is improved, but the device complexity increases
Solution Approach 1:
Multiple gate driving units are merged into one integrated unit that contains all necessary scanning signal generating circuits. This reduces device complexity by eliminating redundant components while maintaining the capability to provide all necessary control signals through internal circuit switching
3Manufacturing precision
If multiple gate driving units are used, then the signal writing-in accuracy is improved, but the manufacturing cost increases
Solution Approach 1:
The patent combines multiple gate driving units into a single unit, reducing the total number of components that need to be manufactured and assembled. This simplification lowers manufacturing costs while the internal circuit design maintains signal writing-in accuracy through precise timing control and dedicated scanning signal generating circuits
Data Source
AI summary
A display substrate includes a plurality of rows of pixel circuits; the pixel circuit includes at least one of a first light emitting control circuit, a second light emitting control circuit, and a first reset circuit; the pixel circuit also includes a light emitting element, a driving circuit, a first energy storage circuit, and a second energy storage circuit; the first light emitting control circuit controls the connection between the first node and the fourth node under the control of a first light emitting control signal; the second light emitting control circuit controls the connection the power supply voltage terminal and the first terminal of the driving circuit under the control of a second light emitting control signal; the first reset circuit controls a potential of the third node under the control of a first reset signal.