Ambient Light Sensor and Backlight for Display Comfort
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Solution Overview
Problem
The psychovisual experience of watching electronic displays is affected by ambient light levels, with low levels causing eye strain and high levels leading to color dissonance with surroundings, as existing technologies fail to effectively adjust display parameters and illumination to match ambient light conditions.
Innovation Solution
A method involving a light-source element that measures ambient light characteristics and adjusts its output using a light-source adjustment model, and a method for adjusting electronic display parameters based on ambient light, ensuring the illumination and display settings match the ambient conditions to enhance viewer comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the display is viewed in low ambient light conditions, then power consumption is reduced, but eye strain increases and viewing comfort deteriorates
Solution Approach 1:
A light source element is introduced as an intermediary between the display and the viewer. This light source illuminates the surroundings behind the display to create a balanced viewing environment, reducing eye strain without requiring increased display brightness that would consume more power
Solution Approach 2:
The illumination is applied locally to specific regions behind the display rather than uniformly across the entire viewing environment. The light source selectively illuminates areas that contribute to viewing comfort while minimizing overall energy consumption
2Object-affected harmful factors
If the display brightness is increased to compensate for low ambient light, then viewing comfort improves, but power consumption increases
Solution Approach 1:
Instead of increasing display brightness directly, a separate light source element is introduced to illuminate the surroundings. This intermediary approach improves viewing comfort by balancing the ambient light levels without requiring the display to consume more power
Solution Approach 2:
The lighting function is separated from the display function. The display maintains its original brightness settings while a dedicated light source element handles the ambient illumination, allowing independent optimization of both functions for energy efficiency
3Object-affected harmful factors
If the display is viewed in high ambient light conditions, then viewing comfort is maintained, but color accuracy deteriorates due to dissonance with surroundings
Solution Approach 1:
The light source element dynamically adjusts its output parameters (intensity and color temperature) based on ambient light conditions. By matching the color temperature of the ambient light, the system maintains color accuracy while preserving viewing comfort across different lighting environments
Solution Approach 2:
A sensor element detects ambient light characteristics and provides feedback to a control unit, which adjusts the light source output accordingly. This closed-loop control ensures that the illumination adapts to match ambient conditions, maintaining color accuracy without compromising viewing comfort
4Adaptability or versatility
If ambient light sensing and adjustment systems are added to the display, then adaptability to different lighting conditions improves, but device complexity increases
Solution Approach 1:
The light source element serves multiple functions: it illuminates the surroundings for viewing comfort, and its output is adjusted based on ambient light sensing for color accuracy. This multi-functional approach achieves adaptability without proportionally increasing system complexity
Solution Approach 2:
The sensing, control, and illumination functions are integrated into a unified system. The sensor element, control unit, and light source work together as a coordinated assembly, reducing the complexity that would arise from separate independent systems
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
Improves the psychovisual experience by optimizing illumination and display settings to match ambient light, reducing eye strain and color dissonance, and providing a more comfortable viewing experience across varying light levels.
Implementation Method 1
performing a measurement on the ambient light with a sensor element, deriving light characteristics of the ambient light from the measurement
Data Source
AI summary
A method and a system for improving the psychovisual experience of watching a display are presented. Measurements on the ambient light are performed by a sensor element, from which characteristics of the ambient light are derived. These are subsequently applied in a light-source adjustment model to determine the output of the light-source element. Moreover, a method and a system for adjusting the output of a light-source element by a feed-back loop involving the output from the light-source element and the input to a sensor element are revealed. In addition, the sensor element is also employed for adjusting the output of an electronic display by applying the results of the measurements to a preference model.