Display Grayscale Compensation for Privacy Viewing Angle Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices emit light not only to the front but also to the sides, allowing unintended viewers to see sensitive information, posing a risk of distraction and accidents, particularly in vehicle applications.
Innovation Solution
A display device with pixels of different viewing angles and a driving method that compensates for grayscale values using a convolution operation and masks to enhance luminance, particularly in areas where sensitive information is displayed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If light is emitted to the side for wide viewing angle, then more users can view the display, but sensitive information becomes visible to unintended viewers
Solution Approach 1:
The display panel is divided into two distinct display areas: a first display area with pixels having a first viewing angle and a second display area with pixels having a second viewing angle. This segmentation allows different portions of the display to serve different viewing angle requirements, enabling wide viewing for general content while maintaining narrow viewing for sensitive information.
Solution Approach 2:
Different pixels are assigned different viewing angle characteristics based on their location and content requirements. The first pixels in the first display area have a first viewing angle suitable for general content, while the second pixels in the second display area have a second viewing angle designed to limit visibility to unintended viewers. This local differentiation of viewing angle quality resolves the contradiction between wide viewing and information security.
2Illumination intensity
If grayscale value is increased to compensate for luminance decrease, then luminance is enhanced, but energy consumption increases
Solution Approach 1:
Grayscale compensation is applied selectively only to pixels in the second display area where luminance decrease occurs, rather than uniformly across the entire display. The driving controller identifies affected pixels and adjusts their grayscale values locally, enhancing luminance where needed while minimizing overall energy consumption.
Solution Approach 2:
The driving controller performs a convolution operation on grayscale values using a mask to predict and compensate for luminance decrease. This feedback mechanism adjusts grayscale values based on predicted luminance changes, ensuring adequate brightness compensation while optimizing energy usage by applying adjustments only where and when necessary.
Data Source
AI summary
A display device is disclosed that includes a display panel including pixels including first pixels having a first viewing angle and disposed in a first pixel row and second pixels having a second viewing angle and disposed in a second pixel row. The display panel includes a first display area where an image is displayed through the first pixels, and a second display area where an image is displayed through the second pixels. A gate driver provides gate voltages to a first gate line connected to the first pixel row and a second gate line connected to the second pixel row. A data driver provides data voltages to the pixels. A driving controller controls the gate driver and the data driver, and compensates for a grayscale value of at least one first pixel among the first pixels of the second display area.