Flexible Display Luminance Compensation Using Optical Sensors
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Solution Overview
Problem
Flexible display devices with bent panels experience non-uniform picture quality due to variations in luminance across different regions, caused by the bent angle, leading to inconsistent image recognition characteristics.
Innovation Solution
A flexible display device with optical sensors in each region measures light amounts and adjusts data voltages using a luminance compensation unit, referencing a lookup table to equalize luminance between regions, thereby minimizing luminance differences and ensuring uniform picture quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the flexible display panel is bent to enable flexible display, then flexibility and portability are improved, but luminance uniformity deteriorates due to variations across different regions
Solution Approach 1:
The patent applies local quality by dividing the display panel into multiple regions (first display region and second display regions) and applying different data voltages to each region. The luminance compensation unit adjusts the data voltages specifically for the second display regions based on measured luminance differences, making each region have optimized local properties rather than treating the entire panel uniformly.
Solution Approach 2:
The patent changes the electrical parameter (data voltage) applied to different regions of the display panel to compensate for luminance variations. By adjusting the data voltages for pixels in the second display regions based on measured luminance differences, the system dynamically modifies electrical parameters to achieve uniform luminance output across the bent panel.
2Measurement precision
If optical sensors are added to measure light amounts in each region, then luminance measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent makes the display panel pixels serve multiple functions. The same pixels that display images also function as light sensors by measuring the luminance of adjacent pixels. This multi-functionality eliminates the need for separate dedicated sensor components, reducing device complexity while maintaining measurement capability.
Solution Approach 2:
The display panel performs self-measurement of luminance using its own pixel structure. The pixels in the first display region measure the luminance of pixels in the second display regions, enabling the system to self-diagnose and self-correct luminance uniformity issues without requiring external measurement devices.
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 effectively compensates for luminance variations across bent flexible display panels, ensuring consistent image recognition regardless of the panel's position, thereby eliminating non-uniformity in picture quality characteristics.
Implementation Method 1
an optical sensor disposed in each of the first display region and the second display regions and measuring amounts of light in the first display region and the second display regions
Data Source
AI summary
A flexible display device and a method of compensating for luminance of the flexible display device, the flexible display device including: a flexible display panel including a first display region and second display regions at opposite sides of the first display region and having a shape of a curved surface that is bent from a central axis of the flexible display panel at a angle; optical sensors disposed in each of the first display region and the second display regions and measuring amounts of light in the first display region and the second display regions; and a luminance compensation unit compensating luminance of the first display region and luminance of the second display regions based on the measured amounts of light.