Display Brightness Control via Dual-Sensor Light Source Positioning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional display apparatuses fail to accurately measure ambient brightness due to light loss from optical sensors, which are affected by direct and reflected light sources, and do not account for nuances in different light sources and environments, leading to inconsistent user perceptions of brightness.
Innovation Solution
A display apparatus equipped with a first sensor to detect light from the front and a second sensor to detect light of different wavelength bands from a different direction, along with a processor that determines the light source's position and type, corrects the light amount based on these factors, and adjusts the display's operation to ensure accurate brightness measurement and control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If an optical sensor is disposed on a lower end of the display apparatus, then the design aesthetics are improved, but the sensor is easily affected by light directly illuminated by external light sources and light reflected from the bottom surface, leading to inaccurate brightness measurement
Solution Approach 1:
The patent divides the optical sensing function into two separate sensors: a first optical sensor for detecting reflected light from the bottom surface and a second optical sensor for detecting direct light from external sources. This segmentation allows each sensor to be optimized for its specific detection task, with the second sensor positioned to avoid bottom surface reflection while the first sensor specifically measures reflected light components, thereby improving overall measurement accuracy despite the aesthetic constraint of bottom-mounted sensors.
Solution Approach 2:
The patent introduces a reflection component as an intermediary element between the bottom surface and the first optical sensor. This reflection component selectively reflects specific wavelengths of light from the bottom surface toward the first sensor while allowing other wavelengths to pass through or be blocked. This intermediary mechanism enables the sensor to detect reflected light information without being overwhelmed by direct illumination from external sources, resolving the measurement accuracy problem.
2Device complexity
If conventional brightness control is performed without considering light source types and disposition forms, then the device complexity is reduced, but the user perceives brightness differently under various lighting conditions
Solution Approach 1:
The patent implements dynamic brightness control by continuously monitoring the types and positions of light sources using the dual optical sensor system. The processor dynamically adjusts display brightness and color temperature based on real-time detection results, transitioning from static to dynamic adaptation. This allows the display to automatically optimize its output under varying lighting conditions (ceiling lights, front lights, fluorescent lights, etc.) without requiring manual user input, thereby improving adaptability while maintaining reasonable system complexity through automated processing.
Solution Approach 2:
The patent changes multiple display parameters simultaneously based on light source detection: brightness level, color temperature, and contrast ratio are all adjusted according to the detected light source type and position. By coordinating changes in these multiple parameters rather than adjusting brightness in isolation, the system achieves better adaptation to different lighting environments while managing complexity through integrated parameter control based on sensor feedback.
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 solution enables precise measurement and adjustment of brightness, accounting for light source position, type, and reflection ratios, resulting in improved display performance and user experience by accurately adapting to various ambient lighting conditions.
Implementation Method 1
a first sensor configured to detect a first light amount of first light which is incident in a first direction from a front side of the display apparatus
Implementation Method 2
a second sensor configured to detect a plurality of second light amounts of different wavelength bands of second light which is incident in a second direction different from the first direction
Data Source
AI summary
There is provided a display apparatus, which includes a display configured to display an image; a first sensor configured to detect a first light amount of first light which is incident in a first direction from a front side of the display apparatus; a second sensor configured to detect a plurality of second light amounts of different wavelength bands of second light which is incident in a second direction different from the first direction; and a processor configured to determine a position of a light source using any one of the plurality of second light amounts and the first light amount, correct the first light amount based on the position of the light source, and control an operation of the display apparatus based on the corrected first light amount.