Signal Selection Circuit for OLED Panel Gate Driving
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Solution Overview
Problem
The existing panel gate driving circuits for OLED display devices require a large number of start signals, which complicates the design and increases costs, especially as the size of the display panel increases.
Innovation Solution
A signal selection circuit for a display panel that divides the panel into N regions, using M gate driving circuits with N gate driving sub-circuits each, and a selection sub-circuit to output frame start signals to the appropriate gate driving sub-circuits in a preset sequence, reducing the number of start signals needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If N start signals are provided for N regions in a GOA-driven display panel, then each region can be independently controlled, but the number of start signals increases significantly when N is large, complicating PLG design and COF interface pins
Solution Approach 1:
A single frame start signal line is designed to serve multiple gate driving circuits simultaneously. The frame start signal line provides the same start signal to multiple gate driving circuits, which then distribute it to their respective gate driving sub-circuits. This multi-functional design allows one signal line to control N regions, eliminating the need for N separate start signal lines and reducing interface pin requirements.
Solution Approach 2:
The display panel is divided into N regions, and each region is further divided into M sub-regions, with each sub-region controlled by a separate gate driving circuit. This hierarchical segmentation allows the system to manage large N values by breaking down the control structure into smaller manageable units, where each gate driving circuit handles M regions independently while sharing the frame start signal.
2Ease of manufacture
If a separate gate driving integrated circuit is used, then the gate driving function is provided, but it is not favorable for narrow bezel and low cost
Solution Approach 1:
The gate driving function is merged directly into the display panel structure, eliminating the need for a separate gate driving integrated circuit. The panel gate driving circuit is integrated within the panel itself, using the same pixel electrode structure to provide both display and gate driving functions. This integration reduces overall system complexity, lowers cost, and enables narrow bezel designs.
Solution Approach 2:
The pixel electrode structure in the display panel is designed to serve dual purposes: as the display pixel electrode and as the gate driving electrode. This multi-functional design allows the same physical structure to perform both display and gate driving functions, eliminating the need for separate gate driving circuitry and reducing manufacturing complexity and cost.
Data Source
AI summary
The present disclosure provides a signal selection circuit and a signal selection method of a display panel, and a display device. The display panel has N regions and includes pixel driving circuits and M gate driving circuits for providing M gate driving signals to the pixel driving circuits; each gate driving circuit includes N gate driving sub-circuits, each of which is configured to provide one gate driving signal to the pixel driving circuits in one region; M≥2, N≥2, and M and N are integers; the signal selection circuit includes: M frame start signal lines, each of which is configured to provide a frame start signal for one gate driving circuit; and a selection sub-circuit configured to output frame start signals written by the frame start signal lines to the gate driving sub-circuits corresponding to the regions of the display panel according to a preset sequence.