Display Control Device Frame Rate Transition Luminance Flicker
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Solution Overview
Problem
Active matrix display apparatuses using organic EL elements experience luminance flicker and display quality degradation when the frame rate is changed, leading to increased power consumption.
Innovation Solution
A display control device with a host control unit and display control unit that sets a transition interval between different frame rates and adjusts luminance by changing the duty cycle and gamma value to reduce luminance differences during frame rate changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the frame rate is changed to reduce power consumption, then power consumption is reduced, but luminance flicker occurs and display quality degrades
Solution Approach 1:
The patent applies preliminary action by setting a transition interval before actually changing the frame rate. During this transition interval, the luminance is gradually adjusted to match the new frame rate conditions. This preparatory luminance adjustment prevents sudden luminance changes that would cause flicker, thereby maintaining display quality while enabling frame rate changes for power consumption reduction.
Solution Approach 2:
The patent utilizes parameter changes by dynamically adjusting the luminance parameter during the transition interval when frame rate changes occur. By modifying the luminance parameter in conjunction with frame rate changes, the system maintains consistent perceived brightness and prevents flicker, allowing frame rate reduction for lower power consumption without compromising display quality.
2Use of energy by moving object
If the frame rate is reduced for low power consumption operation, then power consumption is reduced, but luminance flicker occurs
Solution Approach 1:
The transition interval serves as a preliminary action period where luminance is pre-adjusted before the frame rate reduction takes full effect. This gradual luminance adjustment prevents sudden changes in illumination intensity that would manifest as flicker, enabling smooth transition to lower power consumption states while maintaining luminance stability.
Solution Approach 2:
The patent implements periodic action through the transition interval mechanism, which creates a controlled periodic adjustment of luminance parameters during frame rate changes. This periodic adjustment synchronizes with the frame rate transition, ensuring that luminance changes occur in a controlled manner that prevents flicker while enabling power consumption reduction.
Data Source
AI summary
A host control unit is configured to set a transition interval between a first period for which an image is displayed at a first frame rate and a second period for which the image is displayed at a second frame rate different from the first frame rate, the transition interval being a period in which a frame rate is changed between the first frame rate and the second frame rate, and cause a display control unit to reduce a luminance difference of the image data in the transition interval, the luminance difference being caused when the frame rate is changed between the first frame rate and the second frame rate.