Terminal Light Sensor Temperature Calibration for Screen Brightness

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Solution Overview

Problem

Terminal devices with light sensors face inaccuracies in light intensity detection due to environmental temperature variations, affecting screen brightness adjustments and user experience.

Innovation Solution

A method and apparatus that determine a screen light intensity value by obtaining a light intensity detection value and current environment temperature, using a light intensity calibration coefficient based on a corresponding relationship between temperature and light intensity, to calibrate and eliminate temperature-induced errors, thereby providing an accurate light intensity value for optimal screen brightness adaptation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If light sensor is used to detect screen light intensity, then screen brightness can be adjusted automatically, but detection accuracy deteriorates due to environmental temperature variations

Engineering Contradiction:
Improveautomatic screen brightness adjustmentVSAvoidlight intensity detection accuracy
Core Design Contradiction:
Adaptability or versatilityVSMeasurement precision

Solution Approach 1:

The patent applies parameter changes by introducing temperature as a correction parameter. The system detects both light intensity and temperature, then uses temperature compensation coefficients to adjust the light intensity detection values. This resolves the contradiction by changing the detection parameters to account for environmental temperature variations, thereby maintaining measurement precision while preserving automatic brightness adjustment capability.

Inventive Principle:
Principle #35Parameter changes

Solution Approach 2:

The patent implements feedback by using the detected temperature to dynamically correct the light intensity detection values. The system continuously monitors temperature and applies real-time compensation based on the temperature difference from a reference value. This feedback mechanism ensures accurate light intensity detection across varying environmental conditions while maintaining automatic screen brightness adaptation.

Inventive Principle:
Principle #23Feedback

2Measurement precision

If temperature compensation is implemented, then light intensity detection accuracy is improved, but device complexity increases

Engineering Contradiction:
Improvelight intensity detection accuracyVSAvoiddetection system complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The patent applies universality by making the temperature sensor serve dual purposes: monitoring environmental temperature for user comfort and providing compensation data for light intensity detection accuracy. This multi-functionality approach improves measurement precision without significantly increasing device complexity, as the same temperature sensor is utilized for both purposes.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The system applies self-service by using its own temperature sensor to provide the compensation data needed for accurate light intensity detection. Rather than requiring external calibration equipment or additional specialized sensors, the device uses its existing temperature sensing capability to correct its own detection errors, thereby improving precision without proportionally increasing complexity.

Inventive Principle:
Principle #25Self-service

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

This approach ensures accurate light intensity detection and optimal screen brightness adjustments, enhancing user experience by adapting to environmental conditions and eliminating temperature-related inaccuracies.

Implementation Method 1

a light sensor... detecting a screen light intensity value

Methodology Applied
Scientific EffectPhotoelectric Effect: Photoelectric Effect

Data Source

PatentUS11881135B2Method and apparatus for determining screen light intensity value, and storage medium
Publication Date: 2024.01.23 BEIJING XIAOMI MOBILE SOFTWARE CO LTD
  • US11881135B2 patent drawing
  • US11881135B2 patent drawing
  • US11881135B2 patent drawing

AI summary

A method can be applied to a terminal provided with a light sensor to determine a screen light intensity value. The method can include: obtaining a screen light intensity detection value detected by the light sensor, and obtaining a current environment temperature when the light sensor detects the screen light intensity detection value; determining a light intensity calibration coefficient corresponding to a value of the current environment temperature based on a corresponding relationship between a temperature and the light intensity calibration coefficient; and determining the screen light intensity value of the terminal based on the determined light intensity calibration coefficient and the screen light intensity detection value.