Array Substrate Discharge Circuit for Data Line Power Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
High power consumption in data drive chips used for large-size high-resolution liquid crystal display products with high refresh frequency, particularly due to the need for a wide range of pixel voltage signals, complicates the fabrication process and increases costs as different charge sharing circuit structures are required for various inversion modes.
Innovation Solution
An array substrate with a control circuit, discharge circuit, control signal terminal, and voltage output circuit is designed, where the discharge circuit connects and disconnects data lines with the voltage output circuit between and during frames, respectively, using a preset voltage signal to neutralize and invert grayscale voltages, reducing power consumption without the need for multiple charge sharing circuit structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple charge sharing circuit structures are designed for different inversion modes, then display quality is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent implements a universal charge sharing circuit that can operate in multiple inversion modes (dot inversion, two-dot-per-row inversion, two-dot-per-column inversion) without requiring separate circuit structures. The single circuit design adapts to different display quality requirements through software control, eliminating the need for multiple specialized circuits while maintaining all inversion mode functionalities
Solution Approach 2:
The patent changes operational parameters (control signals) rather than physical structure to achieve different inversion modes. By adjusting control signal timing and configuration, the same charge sharing circuit can switch between different inversion modes, resolving the contradiction between display quality and circuit complexity
2Reliability
If different charge sharing circuit structures are designed for various inversion modes, then display quality is improved, but manufacturing cost increases
Solution Approach 1:
The patent designs a universal charge sharing circuit that serves multiple inversion modes, allowing manufacturers to produce a single circuit design that works across all display quality requirements. This eliminates the need for complex fabrication processes that would otherwise be needed to create multiple specialized circuit structures
Solution Approach 2:
The patent merges the functionality of multiple separate charge sharing circuits into a single unified circuit structure. This consolidation simplifies the fabrication process by reducing the number of different circuit designs that need to be manufactured, while still providing all the inversion mode capabilities through software control
3Reliability
If a wide range of pixel voltage signals is output, then display quality is improved, but power consumption increases
Solution Approach 1:
The patent applies preliminary action by pre-charging or pre-discharging the charge sharing circuit during the frame period before the actual display refresh. This preparatory action reduces the voltage swing required during the active display period, thereby lowering power consumption while maintaining the ability to output the full range of pixel voltage signals needed for high display quality
Data Source
AI summary
The disclosure discloses an array substrate, a method for controlling the same, a display panel and a display device. The array substrate includes data lines, a control circuit, a discharge circuit, a control signal terminal and a voltage output circuit; the control circuit is configured to control an operation of the discharge circuit; the voltage output circuit is configured to output a preset voltage signal with a voltage value between grayscale voltage with positive and negative polarities required for the array substrate; and the discharge circuit is configured to be controlled by the control circuit, in a period of time between two adjacent frames of images being displayed, to control the data lines to be electrically connected with the voltage output circuit, and in a period of time of any one frame of image being displayed, to control the data lines to be electrically disconnected with the voltage output circuit.