ESL Pre-charge Control Circuit Reduces Power Waste
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Solution Overview
Problem
The existing electronic shelf label (ESL) systems face inefficiencies in power consumption due to unnecessary pre-charge operations, leading to power wasting, as they lack an intelligent method to determine and control pre-charge requirements on source lines.
Innovation Solution
A method and apparatus that utilize a pre-charge determination circuit to assess the need for pre-charging source lines based on the amount of forthcoming voltage transitions, allowing for individual control of pre-charge operations, thereby reducing unnecessary power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pre-charge operations are performed on all source lines in ESL systems, then display performance is improved, but power consumption increases
Solution Approach 1:
The patent applies local quality by determining pre-charge requirements individually for each source line based on its specific characteristics and the characteristics of adjacent lines. The pre-charge determination circuit evaluates voltage transitions on a per-line basis, applying pre-charge operations only where necessary rather than uniformly across all lines, thus optimizing power consumption while maintaining display performance.
Solution Approach 2:
The patent changes the parameter of pre-charge control from a fixed uniform approach to a dynamic adaptive approach. The pre-charge determination circuit monitors voltage transition characteristics and adjusts pre-charge operations accordingly, changing the control parameters based on actual display content requirements to reduce unnecessary power consumption.
2Stability of the object's composition
If pre-charge operations are performed frequently, then display stability is improved, but power wasting increases
Solution Approach 1:
The patent implements feedback by having the pre-charge determination circuit continuously monitor voltage transition characteristics on source lines and adjust pre-charge operations based on this feedback. The circuit determines whether pre-charge is needed by analyzing actual display content patterns, creating a closed-loop control system that prevents unnecessary pre-charge operations and reduces power wasting while maintaining display stability.
Solution Approach 2:
The patent applies partial action by performing pre-charge operations on only those source lines that require it, rather than applying pre-charge to all lines. The pre-charge determination circuit identifies specific lines needing pre-charge based on voltage transition analysis, applying the pre-charge effect partially where needed and avoiding it elsewhere, thus reducing overall power consumption.
Data Source
AI summary
A method for determining and controlling performance of pre-charge operations of a plurality of source lines in an ESL system includes: obtaining voltage data of a plurality of lines of a frame to be displayed by a display module in the ESL system; determining whether pre-charge of the source lines in a rest period of a first line is required according to an amount of forthcoming voltage transitions to be generated on the source lines and accordingly obtaining a determination result; and controlling performance of pre-charge operations of the source lines in the rest period of the first line according to the determination result. When the amount of forthcoming voltage transitions to be generated on the source lines exceeds a predefined threshold, pre-charge of the source lines in the rest period of the first line is determined as required.