Smart TV Screen Saver for Afterimage Prevention
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Solution Overview
Problem
Smart TVs connected to settop boxes experience afterimage issues due to lack of key timeout function and screen saver operation, leading to screen degradation and inconvenience for users.
Innovation Solution
A display device and control method that switches the screen from a settop box menu to a live screen or adjusts brightness automatically when a specific signal is received from a remote controller or transmitted to the settop box, preventing afterimage generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the settop box menu screen is displayed continuously without timeout or screen saver, then the user can maintain access to menu functions, but screen degradation and afterimage occur in fixed regions
Solution Approach 1:
The patent implements periodic switching between menu screen and live screen at predetermined intervals. The controller alternates the display between these two states, ensuring that no single region remains static for extended periods, thereby preventing afterimage while maintaining periodic user access to menu functions.
Solution Approach 2:
The patent introduces dynamic switching capability that changes the display state based on user interaction. When the remote controller is activated, the system switches from automatic periodic switching to signal-responsive switching, making the menu accessible on demand while preventing degradation during inactivity.
2Object-affected harmful factors
If the screen switches automatically to prevent afterimage, then screen degradation is reduced, but user control over menu access may be compromised
Solution Approach 1:
The patent incorporates feedback mechanisms through the remote controller detection system. The controller monitors remote controller signals and adjusts the screen switching behavior accordingly - maintaining automatic switching for afterimage prevention while allowing user-initiated signals to override and provide on-demand menu access, thus balancing protection with control.
3Object-affected harmful factors
If brightness is adjusted automatically to prevent afterimage, then screen degradation is reduced, but energy consumption increases
Solution Approach 1:
The patent changes the display parameter (brightness) periodically or in response to remote controller signals. By adjusting brightness levels dynamically rather than maintaining constant high brightness, the system prevents afterimage formation while reducing overall energy consumption compared to continuous maximum brightness operation.
Data Source
AI summary
The present invention relates to a display device and a control method therefor, and involves the concept of controlling a display to reduce luminance from a default luminance to a first luminance for a first reduction time when brightness of a fixed area is maintained for a first predetermined time or more, and controlling the display to increase the luminance from the first luminance to the default luminance, when a set-top box receives, from an external device within a second predetermined time, a first signal for changing a screen from a first screen to a second screen.