Cascade Source Drivers for Reducing Standby Power in Display Devices
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Solution Overview
Problem
Conventional LCD panel driving methods result in significant power consumption due to prolonged standby durations of receivers in source drivers, which are activated simultaneously and remain idle until triggered, leading to unnecessary power dissipation.
Innovation Solution
Implementing a method where cascade source drivers are activated one by one at different times, with each driver triggering the next upon completing data reception, and using a modified frame signal with reset indication sections to synchronize and initiate data reception, reducing standby durations and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all source drivers are activated simultaneously, then they can receive data in sequence, but power consumption increases due to prolonged standby durations
Solution Approach 1:
The patent applies dynamics by transitioning from a static activation model (all drivers activated simultaneously and remaining in standby) to a dynamic activation model (drivers activated sequentially as needed). Each source driver is activated only when its corresponding data section is to be received, and deactivated afterward. This dynamic on-demand activation eliminates prolonged standby periods while ensuring data reception reliability is maintained through proper timing control.
2Ease of operation
If source drivers remain in standby state, then they are ready to receive data, but idle power consumption increases
Solution Approach 1:
The patent applies preliminary action by activating each source driver just before its corresponding data section arrives, rather than keeping it continuously ready. The timing controller activates source drivers in advance of their specific data reception moments and deactivates them after completion. This ensures data reception readiness is achieved only when needed, eliminating idle power consumption during non-reception periods while maintaining operational readiness when required.
Data Source
AI summary
A source driving device, capable of reducing stand-by period and saving power consumption, includes a plurality of source drivers connected in series, which include one or more cascade source drivers. The one or more cascade source drivers include one or more first-type cascade source drivers, each of which, at different times to other first-type cascade source drivers, is respectively activated by a pulse signal generated by a previous source driver, and after the activation, is triggered by a frame signal to receive corresponding frame data in the frame signal. Each of the source drivers generates a pulse signal after receiving the corresponding frame data to activate the next source driver.