Front Light Brightness Adjustment During Display Updates
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Users experience jarring brightness changes during display updates on electronic devices, particularly in dim lighting conditions, due to rapid changes in reflectivity, which can be disturbing and affect the viewing experience.
Innovation Solution
The electronic device adjusts the brightness of its front light during display updates by reducing it during disruptive updates, such as flashing or color value changes, and then increasing it back to the original level, using ambient light sensors and content analysis to maintain a uniform brightness perception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If display updates are performed with standard brightness levels, then content is displayed clearly and update speed is maintained, but users experience jarring brightness changes that cause disturbance and discomfort
Solution Approach 1:
The system performs preliminary actions by adjusting the front light brightness to a reduced level before the display update occurs. This anticipatory adjustment ensures that when the display updates, the brightness change is minimized because the front light has already been dimmed, preventing the jarring effect while maintaining display clarity
Solution Approach 2:
The front light brightness is made dynamic rather than static. The system continuously monitors display update states and adjusts the front light brightness in real-time, reducing brightness during updates and restoring it when updates are complete. This dynamic adjustment resolves the contradiction by adapting the lighting to the display state
2Object-affected harmful factors
If front light brightness is reduced during display updates, then brightness change disturbance is minimized, but the overall visibility and viewing experience may be degraded
Solution Approach 1:
The front light operates in periodic cycles of normal brightness and reduced brightness synchronized with display update cycles. During non-update periods, the front light maintains normal brightness for optimal visibility. During update periods, it temporarily reduces brightness. This periodic action ensures both visibility and comfort are maintained at different times
Solution Approach 2:
The system restores the front light brightness to normal levels immediately after the display update completes. This preliminary restoration action ensures that the visibility degradation is temporary and brief, maintaining overall viewing experience while eliminating the jarring brightness change during the update
3Stability of the object's composition
If the system monitors and adjusts front light brightness dynamically, then brightness uniformity is maintained during updates, but device complexity and control mechanisms increase
Solution Approach 1:
The system implements a feedback mechanism where the display controller monitors display update states and communicates this information to the front light controller. The front light controller then adjusts brightness based on this feedback. This closed-loop feedback system maintains brightness uniformity while using a relatively simple control architecture
Solution Approach 2:
The display controller serves multiple functions: it controls the display updates and simultaneously monitors the update state to trigger front light adjustments. By making the display controller multi-functional, the system avoids adding a separate dedicated monitoring device, thus reducing overall system complexity while maintaining brightness uniformity
Data Source
AI summary
Techniques are presented for adjusting a brightness of a front light that illuminates a display of an electronic device. Typically, page updates on certain types of displays, such as electronic paper displays, result in a relatively large but rapid change in brightness. Therefore, by adjusting the brightness of the front light during the update (e.g., when some, a majority, or all of the pixels are in the white state) and then adjusting the brightness back to another state upon or near completion of the update, the overall brightness perceived by the user remains more uniform. Increasing the uniformity of this perceived brightness in turn decreases the jarring effect of an update and increases the experience of the user.