Display Brightness Restoration in Information Processing Apparatus
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Solution Overview
Problem
Existing information processing apparatuses struggle to properly control the brightness of a display unit at boot-up, often resulting in a reduced brightness setting being retained even after the system has been powered down and restarted.
Innovation Solution
The information processing apparatus includes a processor that performs specific processing stages to control the display unit's brightness. This includes first processing for controlling display on and off, second processing for adjusting the brightness setting based on system programs, and third processing for restoring the original brightness setting when transitioning from the display-on to display-off state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If the brightness setting value is changed to reduce the brightness of the display unit using person detection processing, then power consumption is reduced, but when the system is booted again, the brightness cannot be restored immediately due to OS restrictions
Solution Approach 1:
The patent applies preliminary action by storing the brightness setting value before it is changed to a reduced value. This stored value is then restored after system boot-up, ensuring that the brightness is properly restored even though the OS cannot immediately restore it after booting. The preliminary storage of the original brightness value enables subsequent restoration without delay.
2Adaptability or versatility
If the brightness setting value is changed based on a program running on the system, then the brightness can be dynamically adjusted, but the original brightness setting is lost when transitioning from display-on to display-off state
Solution Approach 1:
The patent applies discarding and recovering by temporarily discarding the original brightness setting value when it is changed to a reduced value for power saving. However, the original value is not truly lost but is recovered by storing it in advance and restoring it after system boot-up or when transitioning from display-off to display-on state.
Solution Approach 2:
The patent applies copying by creating a copy of the brightness setting value before it is changed. This copied value is stored in storage and later used to restore the brightness setting, ensuring that the original value is preserved and can be recovered when needed.
3Use of energy by stationary object
If the system transitions to standby state with reduced brightness, then power consumption is reduced, but the reduced brightness setting is retained after boot-up instead of being restored
Solution Approach 1:
The patent applies preliminary action by storing the brightness setting value before the system transitions to standby state with reduced brightness. After boot-up from standby, this stored value is restored, ensuring that the display brightness is properly restored even though the system was in standby with reduced brightness for power saving.
Data Source
AI summary
An information processing apparatus includes a memory which temporarily stores a program of a system and programs running on the system; and a processor which executes processing based on the programs stored in the memory. The processor performs first processing to perform control between display on and display off of a display unit based on the program of the system and control the brightness of the display unit in the display-on state based on a brightness setting value, second processing to change the brightness setting value based on a program running on the system in the display-on state, and third processing in which, when performing control from the display-on state to the display off by the first processing, the brightness setting value changed by the second processing based on the program running on the system is restored to the brightness setting value before change.