Video Display Picture Quality Correction via Illuminance Sensing
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Solution Overview
Problem
Conventional video display apparatuses are not suitable for detailed picture quality correction due to variations in environmental conditions such as weather, which are influenced by location and time, making it difficult to accurately determine the audio-visual environment and adjust picture quality accordingly.
Innovation Solution
A video display apparatus equipped with sensors to measure external environment conditions, a storing unit for correction values, and an adjusting unit that allows users to modify these values, enabling the processor to optimize picture quality based on measured and stored data, including backlight brightness and LCD panel settings for gamma correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If time information and environment specifying information are used for picture quality correction, then picture quality can be adjusted according to audio-visual environment, but the correction is not detailed enough due to variations in weather and location
Solution Approach 1:
The patent changes the measurement parameter from general environment specifying information (weather, time) to specific illuminance values measured by a light receiving element. This allows precise quantification of external light conditions, enabling detailed picture quality correction based on actual lighting levels rather than broad environmental categories.
Solution Approach 2:
The patent replaces the mechanical/time-based method of determining environment (using clocks and weather data) with an optical measurement system (light receiving element) that directly measures the physical condition affecting display. This substitution provides more accurate and immediate environmental assessment.
2Device complexity
If conventional time-based environment determination is used, then simple picture quality adjustment can be implemented, but it cannot uniquely determine audio-visual environment due to seasonal and latitude variations in sunset times
Solution Approach 1:
The light receiving element automatically measures the external illuminance level without requiring user input or complex time/location calculations. The system self-determines the environmental condition by directly sensing the light, eliminating the need for manual environment specification or complex algorithms based on time and geography.
Solution Approach 2:
The patent replaces the time-based mechanical system (clocks, calendars, geographic calculations) with an optical sensing system that directly measures the relevant physical parameter (illuminance). This provides accurate environment determination independent of time, date, or location calculations.
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 independent and optimal picture quality adjustments tailored to the installing environment and user's audio-visual experience, unaffected by seasonal or geographical changes, ensuring consistent and improved display quality across different lighting conditions.
Implementation Method 1
a sensor that measures an external environment to output a measured value corresponding to the external environment... the sensor measures an illuminance as the measured value
Data Source
AI summary
According to an aspect of the invention, a video display apparatus includes: a sensor that measures an external environment to output the external environment; a storing unit that stores a correction value associated with the measured value; a adjusting unit that changes the correction value based on a given operation by a user; and a processor that adjusts a picture quality of a picture to be displayed on a display based on the measured value and the correction value.