Display Backlight Shadow Adaptation to Environmental Light
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Solution Overview
Problem
Display devices struggle to adaptively change background images based on changes in the surrounding environment, particularly in response to varying lighting conditions, which affects the visual effect of appearing as a transparent window.
Innovation Solution
A display device equipped with a sensor system to detect external lighting conditions, a processor to determine lighting direction and adjust backlight brightness, and a method to calculate dimming values for light sources based on illumination and color temperature, allowing the display to dynamically adjust its background image to match the surrounding environment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display device uses a single uniform backlight brightness, then the device structure is simple and energy consumption is low, but the transparent effect cannot adapt to changing environmental lighting conditions
Solution Approach 1:
The backlight is divided into multiple independently controllable light sources arranged in a matrix, allowing different regions to have different brightness levels. This segmentation enables the display to create shadow effects and adapt to various lighting directions while maintaining manageable control through regional grouping.
Solution Approach 2:
The backlight brightness is dynamically adjusted based on sensed environmental lighting conditions. The processor continuously monitors lighting direction and intensity through sensors, then real-time modifies the brightness of individual light sources to maintain the transparent effect as environmental conditions change.
2Adaptability or versatility
If the display device adjusts brightness of each light source individually, then the transparent effect is enhanced, but energy consumption increases
Solution Approach 1:
Instead of uniformly adjusting all light sources, only specific regions are brightened or dimmed based on the direction and intensity of environmental light. This local quality adjustment maintains the transparent effect where needed while leaving other regions at lower brightness, thereby reducing overall energy consumption.
Solution Approach 2:
The display device uses its own sensors to automatically detect environmental lighting conditions and self-adjust the backlight configuration without user intervention. This self-service mechanism optimizes the transparent effect while minimizing energy consumption by only activating necessary light sources.
3Measurement precision
If the display device uses multiple sensors to detect lighting direction, then the accuracy of shadow positioning is improved, but device complexity increases
Solution Approach 1:
Multiple sensors are strategically positioned at different locations around the display to detect lighting conditions from various angles. This segmentation of sensing functions across multiple points enables accurate determination of light direction and intensity without requiring a single complex sensor system.
Solution Approach 2:
The processor acts as an intermediary that receives data from multiple sensors, processes the information to determine lighting direction, and translates it into appropriate backlight adjustments. This intermediary processing simplifies the overall system by coordinating multiple sensors through a centralized control logic.
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 display device effectively enhances the transparent effect by adaptively changing the background image brightness and shadow size in response to environmental lighting, improving the visual integration with the real background while reducing resource consumption.
Implementation Method 1
a sensor disposed at an outer part of the display and configured to sense an external lighting environment
Implementation Method 2
a backlight comprising a plurality of light sources
Data Source
AI summary
A display device is disclosed. The display device includes a display including a backlight comprising a plurality of light sources and a display panel and configured to display a background image including a preset object, a sensor disposed at an outer part of the display and configured to sense an external lighting environment and a processor configured to determine a direction of a lighting based on the sensed lighting environment, to display a shadow object for the preset object at a position corresponding to the determined lighting direction, and to adjust a brightness of a light source corresponding to a position of the shadow object from among the plurality of light sources based on the sensed lighting environment.