Gate Driver Multi-Frequency Region Control
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Solution Overview
Problem
In display devices employing low frequency driving techniques, power consumption is not reduced when still images are displayed in partial regions of the display panel, as the entire panel is driven at normal frequency.
Innovation Solution
A gate driver capable of providing gate signals at different driving frequencies to respective regions of a display panel, comprising multiple stages with control circuits, carry output circuits, enable node controlling circuits, masking circuits, and gate output circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If low frequency driving technique is applied to reduce power consumption, then power consumption is reduced, but power consumption cannot be reduced when still images are displayed in partial regions as the entire panel is driven at normal frequency
Solution Approach 1:
The gate driver is divided into multiple independent stages (first stage, second stage, etc.), each capable of operating at different frequencies. This segmentation allows different regions of the display panel to be driven at different frequencies simultaneously, enabling partial region low-frequency driving for still images while maintaining normal frequency for other regions.
Solution Approach 2:
The gate driver incorporates dynamic frequency selection capability through control circuits that can switch between different driving frequencies based on the display content. The first enable node controlling circuit and second enable node controlling circuit dynamically adjust the operating frequency of each stage according to whether the displayed content is a still image or moving image in each region.
2Reliability
If the entire display panel is driven at normal frequency to ensure image quality, then image quality is maintained, but power consumption cannot be reduced
Solution Approach 1:
Different regions of the display panel are assigned different driving frequencies based on their specific requirements. Regions displaying still images are driven at low frequency to reduce power consumption, while regions displaying moving images or requiring high quality are driven at normal frequency. This local quality differentiation resolves the contradiction between power consumption and image quality.
3Use of energy by moving object
If multi-frequency driving is implemented to allow different regions to operate at different frequencies, then power consumption can be optimized, but device complexity increases
Solution Approach 1:
The gate driver stages are designed with universal functionality, where each stage can operate in multiple frequency modes. The control circuits (first enable node controlling circuit, second enable node controlling circuit, masking circuits) are designed to handle both low-frequency and normal-frequency operations, reducing the need for completely separate circuit paths and thereby limiting the increase in device complexity.
Data Source
AI summary
A gate driver including a plurality of stages. Each of the plurality of stages includes a first masking controlling circuit including a control circuit, a carry output circuit, a first enable node controlling circuit, a first masking circuit, a first gate output circuit, and a second masking controlling circuit including a second enable node controlling circuit, a second masking circuit and a second gate output circuit. The first masking controlling circuit and the second masking controlling circuit shares the control circuit and the carry output circuit.