Electronic Device Image Gradation Adjustment via Illuminance Sensor

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Solution Overview

Problem

Existing electronic devices fail to effectively adjust the color temperature of images displayed on their screens in response to changing surrounding illuminance, often relying on expensive color sensors and not adequately considering user visual sensitivity characteristics.

Innovation Solution

An electronic device equipped with an illuminance sensor and a processor that adjusts the gradation values of images based on measured surrounding illuminance and user visual sensitivity characteristics, specifically altering the red (R) and blue (B) gain values to maintain a consistent color sense across varying brightness levels.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If a color sensor is used to control color temperature based on surrounding color temperature, then color temperature control accuracy is improved, but device cost increases

Engineering Contradiction:

Improvecolor temperature measurement accuracyVSAvoiddevice cost

Core Design Contradiction:

Measurement precisionVSEase of manufacture

Solution Approach 1:

The patent replaces the expensive color sensor with a cheap illuminance sensor that measures only brightness. The system uses pre-stored visual sensitivity characteristic data (which acts as a disposable lookup table) to determine color temperature compensation values, eliminating the need for costly hardware while maintaining measurement functionality through software-based color space transformation.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The patent substitutes the mechanical/optical color sensing system with an electronic/software-based system. Instead of using a physical color sensor to directly measure color temperature, the system uses an illuminance sensor to measure brightness and then calculates color temperature compensation through software algorithms that reference pre-stored visual sensitivity characteristics, effectively replacing hardware measurement with computational processing.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Stability of the object's composition

If color temperature is controlled to be constant regardless of surrounding brightness, then display stability is improved, but visual comfort deteriorates

Engineering Contradiction:

Improvecolor temperature stabilityVSAvoidvisual discomfort

Core Design Contradiction:

Stability of the object's compositionVSObject-affected harmful factors

Solution Approach 1:

The patent transitions from a static color temperature control system to a dynamic one. Instead of maintaining constant color temperature, the system continuously adjusts color temperature based on real-time illuminance measurements and user-specific visual sensitivity characteristics. The color temperature compensation values are dynamically calculated and applied to match the user's visual adaptation to surrounding lighting conditions.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the color temperature parameter dynamically based on surrounding illuminance and user visual sensitivity. The system calculates compensation values by comparing current illuminance conditions with stored reference data for different visual sensitivity types (e.g., rod-cone balance points), and adjusts color temperature parameters accordingly to maintain optimal visual comfort for each user type under varying lighting conditions.

Inventive Principle:

Principle #35Parameter changes

3Object-affected harmful factors

If brightness is adjusted based on surrounding illuminance, then visual comfort is improved, but color temperature consistency deteriorates

Engineering Contradiction:

Improvevisual comfortVSAvoidcolor temperature consistency

Core Design Contradiction:

Object-affected harmful factorsVSStability of the object's composition

Solution Approach 1:

The patent applies different processing to different color channels (R, G, B) based on their individual visual sensitivity characteristics. Instead of uniformly adjusting all colors, the system calculates separate compensation values for each channel based on their specific sensitivity to surrounding illuminance changes, allowing precise control of color temperature while maintaining overall brightness adaptation for visual comfort.

Inventive Principle:

Principle #3Local 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

The device ensures a consistent color sense for the user by dynamically adjusting the image gradation values in response to changing illuminance, reducing the need for expensive color sensors and improving visual comfort across different lighting conditions.

Implementation Method 1

acquire a surrounding illuminance of the electronic device through the sensor

Methodology Applied

Scientific EffectIlluminance sensing:

Data Source

PatentUS11238773B2Electronic device, method for controlling electronic device, and computer readable medium

Publication Date: 2022.02.01 SAMSUNG ELECTRONICS CO LTD

AI summary

An electronic device is disclosed. The electronic device comprises a sensor, and a processor for acquiring the surrounding illuminance of the electronic device through the sensor, confirming a gain value for adjusting the gradation value of an image on the basis of the surrounding illuminance of the electronic device, and adjusting the gradation value of the image on the basis of the gain value, wherein the gain value is a value determined on the basis of visual sensitivity characteristics of a user.