Gate Driver Odd-Even Scan Phasing for High Frame Rates
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Solution Overview
Problem
Existing display devices face challenges in providing high frame rates while minimizing power consumption and cost, as high-speed switching devices are power-hungry and expensive.
Innovation Solution
A gate driver and display device design that alternates the output of scan signals to odd and even-numbered gate lines with a 180-degree phase difference, using a timing controller to divide frame data into odd and even line frames and control their display cycles accordingly, allowing for high frame rates with reduced power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high-speed switching devices are used to increase frame rate, then frame rate is improved, but power consumption increases and cost increases
Solution Approach 1:
The patent divides the gate lines into two groups: odd-numbered gate lines and even-numbered gate lines. The frame data is segmented into odd line frame data and even line frame data, which are displayed alternately with a phase difference of 180 degrees. This segmentation allows the system to achieve high frame rates without requiring high-speed switching devices for all lines simultaneously, thereby reducing power consumption and cost.
2Productivity
If high-speed switching devices are used to increase frame rate, then frame rate is improved, but cost increases
Solution Approach 1:
By segmenting the display into odd and even line frames that are displayed alternately, the patent reduces the requirement for high-speed switching devices. This approach allows the use of lower-cost switching devices while still achieving high frame rates, thereby reducing manufacturing cost.
3Productivity
If odd line frame data and even line frame data are displayed with a phase difference of 180 degrees, then frame rate is improved, but device complexity increases
Solution Approach 1:
The patent employs periodic action by alternating the display of odd line frame data and even line frame data with a phase difference of 180 degrees. This periodic switching between two simple states (odd lines or even lines) achieves high frame rates without requiring complex device architecture, as each individual frame can be relatively simple while the alternating pattern creates the high effective refresh rate.
Data Source
AI summary
A gate driver can include a plurality of stages configured to output scan signals. An output of each stage among the plurality of stages is configured to connect to a pair of gate lines that are adjacent to each other, output an odd-numbered scan signal to an odd-numbered line among the pair of gate lines according to a first driving frequency, and output an even-numbered scan signal to an even-numbered line among the pair of gate lines according to the first driving frequency. Also, a phase difference between the odd-numbered scan signal and the even-numbered scan signal is 180 degrees.