Luminance Control with Power Feedback for LCD Readability
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Solution Overview
Problem
Users of liquid crystal display devices face difficulties in adjusting luminance and estimating power consumption due to the non-linear relationship between perceived brightness and power consumption, leading to inefficient battery use and suboptimal display readability.
Innovation Solution
An information processing apparatus that includes an illuminance detection unit to measure brightness, a luminance control unit to derive and adjust the luminance set value based on detected brightness, and a display control unit to provide users with power consumption information, allowing for informed luminance adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual luminance adjustment is provided, then ease of operation is improved, but the user cannot accurately estimate power consumption leading to battery drain or excessively low luminance
Solution Approach 1:
The patent implements a feedback mechanism by displaying power consumption information on the display screen itself. The display control unit shows power consumption data in a dedicated region, allowing users to see the actual power consumption corresponding to different luminance levels. This closed-loop feedback enables users to make informed decisions when adjusting luminance, preventing both battery drain and excessively low luminance settings.
2Ease of operation
If automatic luminance adjustment based on photosensor is implemented, then ease of operation is improved, but power consumption of light source is not controlled leading to battery exhaustion
Solution Approach 1:
The system provides visual feedback by displaying power consumption information on the display screen. This allows users to understand the relationship between luminance settings and power consumption, enabling them to adjust luminance levels that balance readability with power conservation, preventing battery exhaustion.
Solution Approach 2:
The display device serves itself by using its own display screen to show power consumption information. This self-service approach eliminates the need for separate indicators or external devices, allowing the system to provide its own operational status information efficiently.
3Use of energy by moving object
If luminance is reduced to save power, then power consumption is reduced, but display readability deteriorates
Solution Approach 1:
By displaying real-time power consumption information, the system enables users to understand the power cost of different luminance levels. Users can then select the lowest luminance setting that still maintains acceptable readability, achieving an optimal balance between power savings and display quality.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables users to adjust luminance effectively while being aware of power consumption, preventing battery drain and ensuring readable display screens by providing real-time power usage feedback.
Implementation Method 1
a technique of adjusting the luminous intensity of a light source of a liquid crystal display based on a detection result of a photosensor
Data Source
AI summary
An information processing apparatus is provided that detects brightness and outputs an illuminance value corresponding to the detected brightness, derives a luminance set value for controlling a light emission signal regulating luminance of a light source based on the illuminance value, and displays derived power consumption information related to power consumption of the light source based on the luminance set value.