Display Control Device for Flicker Suppression in Variable Frame Periods
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display technologies face challenges in suppressing flicker and delay when image frames vary in length, as previous techniques fail to maintain consistent frame periods and light emission duty cycles, leading to visible flicker and delayed image switching.
Innovation Solution
A control device and method that adjust the display panel's frame period by adding individual light emission and extinction periods corresponding to a predetermined number of lines, ensuring consistent light emission duty and minimizing delays during image switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the number of subframes constituting one frame period is changed in accordance with the duty cycle to adjust luminance, then flicker can be suppressed, but image switching delay occurs when frame periods vary
Solution Approach 1:
The frame period is segmented into multiple subframes, and the number of subframes is dynamically adjusted based on the duty cycle. This allows luminance control while maintaining consistent light emission patterns across varying frame periods, thereby suppressing flicker without causing image switching delay
Solution Approach 2:
The control device dynamically adjusts the number of subframes in real-time based on the actual frame period and duty cycle requirements. This dynamic adaptation ensures that the display maintains consistent luminance characteristics even when frame periods vary, preventing both flicker and timing delays
2Adaptability or versatility
If the frame period is extended to accommodate variable frame lengths, then image content can be fully displayed, but flicker increases due to inconsistent light emission patterns
Solution Approach 1:
The control device changes the parameter of subframe count based on the duty cycle and frame period variations. By adjusting this parameter, the system accommodates variable frame lengths while maintaining consistent light emission duty cycles, thereby preventing flicker
Solution Approach 2:
The display uses periodic light emission and extinction within each subframe, with the number of periods adjusted according to the duty cycle. This periodic structure ensures that even when frame lengths vary, the light emission pattern remains consistent and flicker-free
Data Source
AI summary
A control device for a display panel for applications where a frame period in which a same image continues to be displayed varies from frame to frame within a certain range or the frame period is temporarily stable across frames and where a precise frame period is undetermined beforehand. The control device controls the display panel such that, when a frame having a length exceeding a preset number of lines is input, the display panel displays an image over a frame period corresponding to the preset number of lines and an added period added after the frame period. The added period includes one or more individual added periods each including a light emission period and a light extinction period, and the one or more individual added periods are each a period corresponding a predetermined number of lines.