Display Control Device Eliminates Frame Memory to Reduce Power
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing control device for reducing flickering in display apparatuses requires a memory for converting frame rate to subframe rate, leading to increased power consumption.
Innovation Solution
A control device that changes the total number of subframe periods to reconfigure the frame period with n subframe periods, where n is an integer of two or more, regardless of the frame period input, and includes a signal processor that outputs an output video signal on a subframe-period-by-subframe-period basis, and a controller that supplies the output video signal and control signals to the display panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a memory is added to convert frame rate to subframe rate in the panel timing controller, then flickering is reduced, but power consumption increases
Solution Approach 1:
The patent extracts the frame memory function from the panel timing controller and relocates it to the graphics processing unit. This separation allows the timing controller to operate without the power-consuming memory component while still achieving flicker reduction through coordinated control with the GPU.
Solution Approach 2:
The patent makes the graphics processing unit perform multiple functions: not only video signal generation but also frame memory operations and timing control. By utilizing the GPU's existing high-performance memory and processing capabilities for these additional functions, the system avoids adding dedicated components that would increase power consumption.
2Productivity
If the frame period is varied to match GPU processing speed, then display performance is improved, but flickering control becomes difficult
Solution Approach 1:
The patent implements dynamic adaptation by allowing the system to adjust the number of subframes based on the actual frame period variations from the GPU. This dynamic reconfiguration enables the display to maintain proper timing and reduce flicker while accommodating variable frame rates from the graphics processing unit.
Solution Approach 2:
The patent establishes a feedback mechanism where the panel timing controller monitors the actual frame period and adjusts subframe timing accordingly. This closed-loop control ensures that flicker is minimized while maintaining compatibility with variable GPU output speeds.
Data Source
AI summary
A control device is for use in a case where frame periods, each being a period in which one image continues to be displayed, vary in length within a given range or temporarily become stable in length on a frame-by-frame basis, and accurate lengths of the frame periods are not known beforehand. The control device changes a total number of subframe periods to reconfigure the frame period with n subframe periods, where n is an integer of two or more, regardless of the frame period input, and causes the display of the image. The control device includes a signal processor that outputs an output video signal according to a first input video signal on a subframe-period-by-subframe-period basis; and a controller that supplies the output video signal output from the signal processor and a control signal for controlling an operation of the display panel to the display panel.