Display Brightness Adaptation via Illuminance Stability Classification
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing image display apparatuses struggle to adjust image quality settings in response to ambient brightness changes without causing viewer discomfort, particularly in large-sized displays where frequent adjustments lead to flicker and unnatural image perception.
Innovation Solution
An image display apparatus that includes an illuminance detector, an analyzer, and a setting selector, which detects ambient illuminance values, analyzes image settings over time, and applies a setting only when a predetermined threshold is met or a specific time has passed, ensuring smooth transitions and minimizing discomfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If brightness adjustment is performed frequently in response to ambient brightness changes, then the display adapts to the environment quickly, but the viewer experiences discomfort and flicker
Solution Approach 1:
The system performs preliminary classification of brightness change frequency into stable and unstable states, and pre-sets different interrupt periods for each state. This allows the system to switch between frequent adjustment (in stable state) and infrequent adjustment (in unstable state) without real-time calculation delays, resolving the contradiction by preparing adjustment strategies in advance based on the detected brightness stability.
Solution Approach 2:
The system dynamically changes the interrupt period for brightness adjustment based on the classified stability state. In stable brightness environments, a longer interrupt period is used to reduce frequent adjustments. In unstable environments, a shorter interrupt period enables quicker adaptation. This dynamic adjustment of the control parameter resolves the contradiction between adaptability and viewer comfort.
2Device complexity
If a single illuminance sensor is used for brightness detection, then the device structure is simple, but the measurement accuracy decreases in environments with rapid brightness changes
Solution Approach 1:
The system performs preliminary classification of the brightness environment into stable and unstable states before determining the adjustment strategy. This pre-classification allows the system to recognize unstable environments and apply appropriate filtering or adjustment strategies, compensating for the limitations of a single sensor without requiring multiple sensors.
Solution Approach 2:
The system changes the control parameter (interrupt period) based on the classified stability state. In unstable brightness environments, the system adjusts the interrupt period to reduce the frequency of brightness adjustments, thereby reducing flicker and improving measurement effectiveness. This parameter change compensates for the reduced measurement precision of a single sensor in dynamic environments.
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 solution allows for image quality adjustments that are natural and comfortable for viewers, reducing the occurrence of flicker and unnatural image perception even in environments with rapid brightness changes, while enabling flexible and timely setting applications.
Implementation Method 1
an illuminance sensor and sets the light-emission brightness and the timing for controlling brightness depending on the frequency of the change of the signal detected by an illuminance sensor
Data Source
AI summary
An image display apparatus is for correcting an input image signal and displaying an image on a display unit based on the corrected image signal, and includes: an illuminance detector for sequentially detecting illuminance values around the apparatus; an illuminance analyzer for sequentially outputting image settings for correction of the image signal depending on the detected illuminance values; a setting selector for outputting an image setting which has been output from the analyzer a number of times greater than a number of times any other image setting has been output, or an image setting determined by the statistic of the image settings output from the analyzer; and a setting application unit for changing the image setting used to correct the image signal to be equal to the image setting output from the selector, when a predetermined change occurs in the input image signal or when a predetermined time has come.