Display Driving Circuit Zone Update Signal Merging
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Solution Overview
Problem
Existing display driving circuits face challenges in managing multiple zones for local updates, leading to an increase in auxiliary signals and wider screen borders, which affects layout area and power efficiency.
Innovation Solution
A display driving circuit with multiple gate driving circuit groups and scan-control signal generators that dynamically generate zone start/ending signals, allowing for local updates without increasing the screen border size, using selectors, registers, and gates to select between driving and auxiliary signals based on zone scan-control signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple groups of auxiliary start/end-updating signals are added to control multiple zones for local updates, then the ability to perform local updates of display zones is improved, but the number of signal lines increases and the screen border becomes wider
Solution Approach 1:
The patent merges the functions of multiple auxiliary start/end-updating signals into a single shared group of signals. The scan-control signal generator uses this single group to dynamically generate zone-specific start and end updating signals for multiple zones, eliminating the need for separate auxiliary signal groups for each zone while maintaining local update capability across multiple zones.
Solution Approach 2:
The shared auxiliary start/end-updating signals serve multiple functions by being dynamically controlled to generate zone-specific updating signals. The scan-control signal generator makes the single group of auxiliary signals universal by using zone scan-control signals to selectively activate different zones, allowing one group of signals to control multiple zones instead of requiring dedicated signals for each zone.
2Adaptability or versatility
If multiple groups of auxiliary start/end-updating signals are added to control multiple zones, then the local update functionality is improved, but the layout area increases due to more signal lines
Solution Approach 1:
The patent combines multiple auxiliary signal groups into a single shared group that serves all zones. By merging the signal lines and using a scan-control signal generator to dynamically route the shared signals to different zones, the layout area is reduced while maintaining the ability to perform local updates on multiple zones independently.
3Adaptability or versatility
If more auxiliary signals are used to control more zones, then the zone control flexibility is improved, but the signal management complexity increases
Solution Approach 1:
The scan-control signal generator acts as an intermediary between the single group of auxiliary start/end-updating signals and the multiple zones. It receives the shared auxiliary signals along with zone scan-control signals, and dynamically generates the appropriate zone-specific updating signals. This intermediary simplifies signal management by centralizing the control logic in one unit rather than requiring separate signal routing for each zone.
Data Source
AI summary
A display driving circuit is provided. The display driving circuit includes: at least one gate driving circuit, each of the at least one gate driving circuit generating a driving signal so that display pixels update pixel data according to each of the driving signals; and at least two enable-selecting circuits, generating a zone start-updating signal and a zone end-updating signal according to a zone scan-control signal and the driving signals and enabling the at least one gate driving circuit of a first portion according to the zone start-updating signal and the zone end-updating signal. In this way, the at least one gate driving circuit of the first portion generates the driving signals to update part of the display pixels, and that power saving is achieved.