Scan Control Circuit X-Direction Partitioning for Display Power
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Solution Overview
Problem
Conventional multi-frequency display (MFD) technologies are limited in their ability to partition and control display panels in the x-direction, which restricts their power-saving capabilities, especially in scenarios like landscape mode on mobile devices where different frame rates need to be allocated across areas in both x and y directions.
Innovation Solution
A method and circuitry that enable x-direction partitioning by dividing a line of pixels into groups and using scan control signals and enable signals to determine which groups are refreshed, allowing for flexible frame rate allocation across different areas of the display panel, combining with y-direction partitioning for enhanced power saving.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional MFD operations are used with y-direction partition only, then the display panel can be controlled in the vertical direction, but x-direction partition for different frame rate allocations is not feasible
Solution Approach 1:
The scan control circuit is divided into multiple independent shift circuits, with each shift circuit responsible for generating scan control signals for a specific group of pixels. This segmentation allows the circuit to handle x-direction partitioning by enabling independent control of different pixel groups within the same scan line, thereby achieving flexible frame rate allocation without requiring a completely new control architecture
Solution Approach 2:
The patent extends the conventional y-direction partitioning by introducing x-direction partitioning capability. By dividing pixels into multiple groups along the x-direction and assigning different frame rates to different groups, the system achieves two-dimensional frame rate allocation, significantly improving adaptability for various display scenarios such as landscape mode and foldable devices
2Use of energy by stationary object
If the refresh rate is reduced in LFR areas to save power, then power consumption is reduced, but the image quality may deteriorate if the refresh rate is too low
Solution Approach 1:
The patent applies different frame rates to different spatial regions of the display panel based on content requirements. Video areas are allocated high frame rates to maintain image quality and motion smoothness, while text areas are allocated low frame rates to reduce power consumption. This local quality differentiation ensures that each region receives the appropriate refresh rate for its specific display needs, optimizing both power efficiency and image quality
Solution Approach 2:
The system dynamically adjusts frame rate allocation based on real-time content analysis. The scan control circuit can adaptively switch between different frame rate configurations for different pixel groups, allowing the display to respond to changing content requirements. This dynamic adjustment ensures that power consumption is optimized without compromising image quality when high refresh rates are needed
3Adaptability or versatility
If x-direction partition is implemented by dividing pixels into groups, then flexible frame rate allocation is achieved, but the scan control circuit complexity increases
Solution Approach 1:
The scan control circuit is segmented into multiple shift circuits, with each shift circuit handling a specific group of pixels. This modular segmentation allows the circuit to support x-direction partitioning while maintaining a relatively simple overall structure. Each shift circuit can independently generate scan control signals for its assigned pixel group, enabling flexible frame rate allocation without requiring complex centralized control logic
Solution Approach 2:
The shift circuits are designed to be multi-functional, capable of operating in different modes to support both conventional y-direction partitioning and the new x-direction partitioning. This universality allows the same basic circuit structure to handle multiple frame rate allocation scenarios, reducing the need for additional specialized circuitry and thereby limiting the increase in overall circuit complexity
Data Source
AI summary
A method of controlling a display panel, wherein the display panel has a plurality of pixels among which a line of pixels are divided into a plurality of groups of pixels, includes steps of: generating a scan control signal for the line of pixels when scanning the line of pixels; outputting a plurality of enable signals, each for controlling one of the plurality of groups of pixels; and determining whether to output a scan signal to each of the plurality of groups of pixels according to the scan control signal and each of the plurality of enable signals when scanning the line of pixels.