Display Driver Internal Oscillator Sync Signal Power
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Solution Overview
Problem
Display systems consume significant power to control or drive display panels, particularly due to continuous supply of sync inputs for emission control signals, which increases energy consumption.
Innovation Solution
Incorporating internal oscillator circuitry within the display driver to generate an internal oscillation signal, allowing the display driver to generate a resultant sync signal both with and without external sync input, thereby reducing the need for continuous external sync input and minimizing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If external sync input is continuously supplied to control emission scan driver circuitry, then emission control accuracy is improved, but power consumption increases
Solution Approach 1:
The patent applies periodic action by switching between external sync input and internal oscillation signal in different periods. During first period, external sync input is used for accurate emission control. During second period, internal oscillation signal takes over to maintain emission control without continuous external input, thereby reducing power consumption while preserving control accuracy when needed.
Solution Approach 2:
The display driver is enhanced with internal oscillation signal generation capability, allowing it to serve itself during the second period when external sync input is not supplied. The internal oscillator generates the necessary timing signals independently, enabling the system to maintain emission control functionality without continuous external support, thus reducing overall power consumption.
2Use of energy by moving object
If internal oscillator circuitry is added to generate internal oscillation signal, then power consumption is reduced, but device complexity increases
Solution Approach 1:
The patent merges the external sync input function and internal oscillation signal generation within the display driver. The timing controller circuitry is designed to accept both external sync input and internal oscillation signal, and intelligently switch between them based on operational period. This integration allows the system to reduce power consumption by using the internal oscillator during the second period while maintaining the ability to use external sync input during the first period, balancing power savings with functional requirements.
3Use of energy by moving object
If external sync input is used during first period and internal oscillation signal during second period, then power consumption is reduced, but timing synchronization difficulty increases
Solution Approach 1:
The timing controller circuitry employs feedback mechanisms to manage the transition between external sync input and internal oscillation signal. The controller monitors the operational period and automatically switches signal sources accordingly. During the first period, it uses external sync input for precise synchronization. During the second period, it transitions to internal oscillation signal, maintaining timing coherence through controlled switching. This feedback-based management simplifies the timing synchronization challenge despite using dual signal sources.
Data Source
AI summary
A display driver includes internal oscillator circuitry, timing controller circuitry, and panel interface circuitry. The internal oscillator circuitry is disposed internal to the display driver and configured to generate an internal oscillation signal. The timing controller circuitry is configured to generate a resultant sync signal using an external sync input received from an entity external to the display driver during a first period of a frame period. The timing controller circuitry is further configured to generate the resultant sync signal using the internal oscillation signal during a second period of the frame period, the second period following the first period. The panel interface circuitry is configured to generate, based on the resultant sync signal, an emission control signal that controls emission scan driver circuitry configured to drive a plurality of emission scan lines of a display panel.