Display Device Control Signal Mechanism for Power Reduction
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Solution Overview
Problem
Current display devices face challenges in reducing power consumption and cost while preventing component deterioration, particularly due to the need for frame memories and complex timing configurations in display control systems.
Innovation Solution
A display device configuration that includes a control signal mechanism allowing the image signal supplying means to directly receive and supply image signals to the displaying means, eliminating the need for frame memories and enabling adaptive pausing periods based on display characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If communication between display control device and display module is temporarily suspended to reduce power consumption, then power consumption is reduced, but frame memory is required which increases cost
Solution Approach 1:
The invention extracts the image signal storage function from the display module's frame memory and relocates it to the display control device's frame memory. This allows the display module to be suspended from receiving image signals during pausing periods without requiring its own frame memory, thereby reducing power consumption while avoiding the cost increase associated with adding frame memory to the display module.
Solution Approach 2:
The display control device acts as an intermediary that holds the image signal in its frame memory and supplies it to the display module when needed. This mediator approach enables temporary suspension of communication during pausing periods while ensuring the display module can reconstruct the image using the stored signal, eliminating the need for frame memory in the display module itself.
2Productivity
If pausing periods are set by display control device according to each type of display module, then scanning can be optimized, but circuit configuration becomes large-scale and complex increasing cost
Solution Approach 1:
The invention implements a universal pausing period setting mechanism in the display control device that can accommodate different types of display modules without requiring complex individual configurations. The control device provides multi-functional timing control that adapts to various display module types while maintaining a relatively simple circuit configuration, thereby achieving scan process optimization without proportionally increasing complexity and cost.
3Use of energy by moving object
If pausing period is extended to reduce power consumption, then power consumption is reduced, but display components may deteriorate
Solution Approach 1:
The invention implements periodic refreshing of the image signal during pausing periods, where the display module periodically reconstructs the image from the stored signal in the frame memory. This periodic action maintains display component characteristics by preventing excessive pausing while still achieving power consumption reduction through controlled non-scanning periods, balancing energy savings with component reliability.
Data Source
AI summary
A display device (1) in accordance with an embodiment of the present invention includes: an LCD driving section (20) and an LCD controller (30) for causing an image based on an image signal to be displayed on an LCD (10); and a CPU (40) for supplying an image signal to the LCD controller (30), the LCD controller (30) being configured to supply, to the CPU (40), a control signal that instructs the CPU (40) to supply an image signal, and the CPU (40) being configured to supply an image signal in a case where the CPU (40) receives a control signal.