Display Control Unit for Parallel State Transitions in Imaging Apparatus
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Solution Overview
Problem
Conventional video display systems require lengthy switching times between display devices, such as electronic view finders (EVFs) and LCD panels, due to the need to stop and start power and video signals sequentially, leading to increased power consumption and delayed imaging opportunities.
Innovation Solution
An information processing apparatus with a display control unit that transitions the first display unit from an active to a standby or stopped state and the second display unit from standby or stopped to active state in parallel, allowing continuous video signal supply and reducing switching time by controlling the states of both units independently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the LCD panel is closed and power is cut off to stop display, then power consumption is reduced, but the switching time to resume display increases
Solution Approach 1:
The video signal is supplied to both the EVF and LCD panel in advance before switching is needed. The LCD panel receives and buffers the video signal while in the off state, so that when power is restored after closing, the display can resume immediately without waiting for signal generation, thereby reducing switching time while maintaining power savings
2Use of energy by moving object
If the video signal supply is stopped to one display device and started to the other sequentially, then power consumption is controlled, but the switching time becomes long
Solution Approach 1:
The video signal supply is made continuous to both display devices simultaneously. The LCD panel continues to receive the video signal even when powered off, maintaining signal readiness. This eliminates the sequential stop-start process, enabling instant switching between devices while controlling power consumption by only activating the light-emitting components when needed
3Use of energy by moving object
If power is cut off to the LCD panel to save energy, then power consumption decreases, but imaging opportunities are delayed
Solution Approach 1:
The system performs preliminary action by continuously supplying the video signal to the LCD panel's input buffer even when the panel is powered off. This pre-loading of video data ensures that when the LCD panel is quickly powered on for an imaging opportunity, the display is ready immediately without delay, thus preventing loss of imaging opportunities while still allowing power savings during normal operation
Data Source
AI summary
An information processing apparatus, a display control method, and an imaging apparatus for shortening a switching time of a display device that displays a video. The information processing apparatus includes a display control unit that, in a case where display of a video is switched from a first display unit to which a first video signal is input via a first bus to a second display unit to which a second video signal is input via a second bus, causes the first display unit to transition from an activated state in which operation is performed in a light-emitting state to a standby state in which operation is performed in a non-light-emitting state or a stopped state in which operation is stopped in the non-light-emitting state, and causes the second display unit to transition from the standby state or the stopped state to the activated state.