Display Brightness Limiting for Dark-Environment Activation

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Solution Overview

Problem

Sudden illumination of display devices in dark environments causes temporary vision impairment due to pupil adjustment, which can be hazardous, especially for drivers.

Innovation Solution

Implement a luminescence shock avoidance algorithm that adjusts display brightness levels based on ambient light conditions to prevent sudden brightness changes, using ambient light sensors and user settings to gradually increase brightness after initial dimming.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If the display device is illuminated at full brightness when activated from standby mode, then the display provides sufficient visibility and information, but it causes temporary vision impairment due to sudden brightness change in dark environments

Engineering Contradiction:

Improvedisplay brightnessVSAvoidtemporary vision impairment

Core Design Contradiction:

Illumination intensityVSObject-affected harmful factors

Solution Approach 1:

The system performs preliminary detection of ambient light conditions before activating the display. When darkness is detected, the display brightness is pre-adjusted to a lower level before full activation, preventing sudden brightness changes that cause vision impairment while maintaining sufficient visibility

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The display brightness is made dynamic and adjustable based on ambient light conditions. The system continuously monitors ambient light levels and automatically adjusts display brightness accordingly, transitioning from static full brightness to adaptive dynamic brightness control

Inventive Principle:

Principle #15Dynamics

2Use of energy by moving object

If the display device uses sleep mode to save battery power, then energy consumption is reduced, but sudden illumination upon activation causes luminescence shock

Engineering Contradiction:

Improvebattery power consumptionVSAvoidluminescence shock

Core Design Contradiction:

Use of energy by moving objectVSObject-affected harmful factors

Solution Approach 1:

Before activating the display from sleep mode, the system preliminarily detects ambient light conditions and prepares the display brightness setting accordingly. This preliminary action ensures that when the display activates, it does so at an appropriate brightness level that avoids luminescence shock while maintaining power savings

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system uses feedback from ambient light sensors to automatically adjust display brightness settings. The sensor continuously monitors ambient light levels and feeds this information back to the display control system, which adjusts brightness in real-time to prevent luminescence shock upon activation from sleep mode

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS12405689B2Luminescence shock avoidance in display devices

Publication Date: 2025.09.02 APPLE INC

AI summary

A luminescence shock avoidance algorithm selectively limits the brightness level of a display device when the display device is activated in a dark environment to prevent the temporary vision impairment that can occur when a display device is activated in a dark environment. The algorithm receives the state of the display (e.g. on or in standby mode), and can optionally receive an ambient lighting value from an ambient light sensor and a user-selectable manual brightness adjustment setting to determine whether luminescence shock avoidance should even be triggered, and if it is triggered, how much should the brightness level of the display be limited.