View Angle Switching Brightness Compensation
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Solution Overview
Problem
Display performance is degraded when switching between small and wide view angles due to changes in screen brightness, as the screen brightness increases at the small view angle and decreases at the wide view angle, affecting user experience.
Innovation Solution
A method and apparatus that determine a target grayscale value based on the current view angle and image grayscale, ensuring the screen brightness remains consistent by switching between collimating and diverging backlights, setting the image grayscale to the target value during view angle switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display screen switches between small view angle and wide view angle using collimating and diverging backlights, then the view angle requirement is satisfied, but the screen brightness changes causing display performance degradation
Solution Approach 1:
The patent changes the grayscale parameter of the displayed image to compensate for brightness changes during view angle switching. When switching from small to wide view angle, the grayscale is adjusted to a target value that compensates for the brightness decrease, maintaining consistent perceived brightness across different view angles.
Solution Approach 2:
The patent performs preliminary calculation of the target grayscale value before the actual view angle switching occurs. By pre-computing the required grayscale adjustment based on the relationship between view angle and brightness, the system prepares the compensation parameter in advance to ensure smooth transition without noticeable brightness flicker.
2Illumination intensity
If the screen brightness is increased at small view angle using collimating backlight, then the brightness requirement is met, but the brightness becomes inconsistent when switching to wide view angle
Solution Approach 1:
The patent establishes a feedback mechanism where the system detects the current view angle state and automatically adjusts the grayscale parameter accordingly. The target grayscale value is determined based on feedback from the view angle switching state, creating a closed-loop control system that maintains brightness consistency across different viewing conditions.
3Adaptability or versatility
If the display screen uses different backlights for different view angles, then the viewing requirement is satisfied, but the display performance degrades due to brightness change
Solution Approach 1:
The patent changes the grayscale parameter of the image to compensate for brightness changes during view angle switching. When switching from small to wide view angle, the grayscale is adjusted to a target value that compensates for the brightness decrease, maintaining consistent perceived brightness across different view angles.
Data Source
AI summary
A view angle switching method includes: determining a current view angle of a display screen and acquiring a current image grayscale value of a displayed image when a view angle switching instruction is detected; determining a target grayscale value based on the current view angle of the display screen and the current image grayscale value, where, at the target grayscale value, a screen brightness value at the switched view angle is equal to a brightness value of the screen before switching; and switching the display screen between a small view angle and a wide view angle in response to the view angle switching instruction, and setting the image grayscale of the image as the target grayscale value.