Electro-optical Device Pre-charge Circuit Timing
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Solution Overview
Problem
Existing electro-optical devices face challenges in securing the write time for data signals while supplying pre-charge signals, leading to potential display quality issues and inefficiencies.
Innovation Solution
The electro-optical device employs a data signal circuit and pre-charge circuit configuration that allows for the secure supply of pre-charge signals during the data signal write time, with specific timing and potential control mechanisms to ensure uniformity and reduce potential variations, enabling efficient data signal writing and improved display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a pre-charge signal is supplied to each signal line prior to writing the data signal, then display quality is enhanced, but the write time of the data signal is shortened
Solution Approach 1:
The patent segments the pre-charge signal supply operation by dividing multiple data lines into groups and supplying pre-charge signals to each group sequentially rather than simultaneously. This segmentation allows the pre-charge operation to be distributed over time, reducing the impact on any single data line's write time while still providing pre-charge benefits to all lines.
Solution Approach 2:
The patent implements periodic action by supplying pre-charge signals to different groups of data lines in alternating periods. During one period, pre-charge signals are supplied to odd-numbered data lines while even-numbered lines receive data signals, and in the next period, the roles are reversed. This periodic alternation ensures that each data line receives pre-charge treatment without permanently compromising its write time.
2Manufacturing precision
If a pre-charge signal is supplied to each signal line, then display quality is enhanced, but the complexity of the driving circuit increases
Solution Approach 1:
The patent merges the pre-charge signal supply function with the existing data signal driving circuitry. By using the same signal lines and timing control mechanisms already present in the display driver, the pre-charge function is integrated into the existing architecture rather than requiring completely separate circuitry, thus limiting the increase in overall system complexity.
Solution Approach 2:
The patent makes the data driving circuit multi-functional by enabling it to perform both data signal writing and pre-charge signal supply operations. The same signal lines and control logic are used for both functions, with the circuit automatically switching between pre-charge and data writing modes based on the timing phase, thereby avoiding the need for dedicated pre-charge circuitry.
Data Source
AI summary
An electro-optical device includes a first pixel provided corresponding to intersection of a first data line and a scanning line, a second pixel provided corresponding to intersection of a second data line and the scanning line, a data signal circuit configured to supply a first data signal to the first pixel via the first data line in a first period and supply a second data signal to the second pixel via the second data line in a second period that is started after completion of the first period, and a pre-charge circuit configured to supply a second pre-charge signal to the second data line in the first period after supplying a first pre-charge signal to the second data line in the first period.