Shared Buffer LCD Source Line Driver Power Reduction
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Solution Overview
Problem
Conventional liquid crystal display (LCD) source line driver circuits consume excessive power as each source line has its own driver circuit, which remains active during operation, leading to inefficiencies in power management.
Innovation Solution
The proposed solution involves a data comparator circuit that compares data for driving one source line with data for driving another source line, allowing for selective disabling of redundant buffer amplifiers and enabling a common source line buffer to drive multiple source lines when data values are the same, thereby reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If each source line has its own driver circuit that remains active during operation, then each source line can be independently driven, but power consumption increases
Solution Approach 1:
The patent merges multiple source line driver circuits into a shared buffer system. When adjacent source lines have identical data values, a single buffer amplifier drives multiple source lines simultaneously through switching circuits, eliminating the need for separate active driver circuits for each line and reducing overall power consumption.
Solution Approach 2:
The patent implements dynamic switching between independent and shared driving modes. Control circuits dynamically determine whether to activate separate buffer amplifiers for each source line or to share a common buffer based on real-time data comparison, allowing the system to adapt its power consumption to the actual display requirements.
2Use of energy by moving object
If a common buffer drives multiple source lines, then power consumption decreases, but data accuracy may be compromised if data values differ
Solution Approach 1:
The patent incorporates feedback mechanisms through data comparison circuits that continuously monitor the data values intended for adjacent source lines. Based on this feedback, the control circuits dynamically switch between shared and independent driving modes, ensuring that data accuracy is maintained when source lines have different values while enabling power savings when values are identical.
Solution Approach 2:
The patent introduces intermediary control circuits and switching elements between the buffer amplifiers and source lines. These intermediaries act as mediators that can either connect multiple source lines to a common buffer when data values match or isolate them when data values differ, thus preserving data accuracy while enabling power-efficient shared driving.
3Use of energy by moving object
If buffer amplifiers are selectively disabled, then power consumption reduces, but circuit complexity increases due to switching and control circuits
Solution Approach 1:
The patent implements multi-functional control circuits that perform both data comparison and switching control functions. These universal control circuits analyze data values and simultaneously generate the appropriate switching signals to enable or disable buffer amplifiers, reducing the need for separate dedicated control circuits and thereby limiting the increase in overall circuit complexity.
Data Source
AI summary
Methods of driving source lines and/or circuits/systems for driving source lines are provided. Source lines of a display device are driven by comparing first data for driving a first buffer associated with a first source line of the display device and second data for driving a second buffer associated with a second source line of the display device and selectively disabling the second buffer and driving the second source line of the display device with the first buffer based on the comparison of the first and second data.