Dual Microcomputer Display Control for Flicker Reduction
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Solution Overview
Problem
Conventional display control apparatuses that use a single microcomputer to control both luminance and contrast often result in screen flicker due to the difficulty in synchronizing the switching of these parameters.
Innovation Solution
A display control apparatus employing two separate microcomputers, one for controlling luminance and the other for contrast, where the switching of one microcomputer is delayed to synchronize with the other, ensuring that both parameters are adjusted at substantially the same timing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single microcomputer controls both luminance and contrast switching, then the switching can be synchronized, but the system complexity increases and reliability decreases
Solution Approach 1:
The control system is segmented into two independent microcomputers: a first microcomputer dedicated to luminance control and a second microcomputer dedicated to contrast control. This segmentation distributes the control functions, reducing the complexity of each individual controller while maintaining overall system reliability through specialized dedicated control for each parameter.
2Device complexity
If separate microcomputers control luminance and contrast, then the device complexity is reduced, but screen flicker occurs due to unsynchronized switching
Solution Approach 1:
A communication mechanism acts as an intermediary between the two microcomputers. When the second microcomputer (contrast control) determines to switch contrast, it notifies the first microcomputer (luminance control) of the switching timing. This intermediary communication ensures synchronized switching of both parameters, eliminating screen flicker while maintaining the benefits of separate control systems.
3Adaptability or versatility
If luminance and contrast are switched independently without coordination, then the control flexibility increases, but display quality deteriorates due to flicker
Solution Approach 1:
The system implements feedback control where the second microcomputer monitors the contrast switching timing and communicates this information to the first microcomputer. The first microcomputer then adjusts its luminance switching timing based on this feedback, ensuring that both parameters switch in coordination. This feedback mechanism maintains display quality while preserving the flexibility of separate control systems.
Data Source
AI summary
A display control apparatus according to an embodiment includes a first microcomputer and a second microcomputer. The first microcomputer switches display luminance of a display. The second microcomputer switches contrast of the display. One of the first and second microcomputers delays switching according to switching of the other of the first and second microcomputers.