Display Panel Subpixel Layout for Zoned Viewing Angle Switching
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Solution Overview
Problem
Existing display devices face challenges in freely adjusting the viewing angle of specific areas, particularly in controlling the angles for left, right, and up and down directions, and they often consume high power during viewing angle adjustments.
Innovation Solution
A display device with a first viewing angle control circuit connected to first narrow and wide angle control lines, and subpixels capable of emitting light at different angles, allowing simultaneous control of viewing angles and low power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If viewing angle control is implemented in existing display devices, then viewing angle adjustment capability is improved, but power consumption increases
Solution Approach 1:
The display panel is divided into multiple pixel circuits, with each pixel circuit containing multiple light emitting devices that can be independently controlled. This segmentation allows selective activation of specific light emitting devices based on viewing angle requirements, enabling localized viewing angle control without increasing power consumption across the entire display. The patent implements this by dividing each pixel into multiple sub-pixels with different light emitting devices, where each device can be controlled independently through separate control lines.
Solution Approach 2:
The display device dynamically switches between different light emitting devices within pixel circuits based on real-time viewing angle requirements. The control circuits adjust which light emitting devices are activated according to the desired viewing angle (narrow or wide), allowing the system to adapt its configuration dynamically rather than being fixed. This dynamic switching enables viewing angle control while consuming power only when and where needed.
2Adaptability or versatility
If viewing angle control is implemented in existing display devices, then viewing angle adjustment capability is improved, but device complexity increases
Solution Approach 1:
The light emitting devices serve multiple functions: they can operate in narrow viewing angle mode for privacy protection and wide viewing angle mode for shared viewing. The same pixel circuit structure supports both viewing angle configurations, eliminating the need for separate hardware systems for different viewing modes. The control circuits are designed to handle both narrow and wide angle operations through unified control logic, reducing overall system complexity.
Solution Approach 2:
Different regions of the display panel can have different viewing angle characteristics by selectively activating specific light emitting devices in different pixel circuits. The patent implements this by allowing certain pixel circuits to operate in narrow angle mode while others operate in wide angle mode simultaneously, creating localized viewing angle zones without requiring the entire display to be reconfigured. This local quality approach simplifies the control architecture compared to global reconfiguration.
3Object-affected harmful factors
If narrow viewing angle mode is used, then user privacy is improved, but visibility for multiple users deteriorates
Solution Approach 1:
The display device dynamically switches between narrow and wide viewing angle modes based on the viewing needs of users. When privacy is the priority, the system activates narrow angle light emitting devices that restrict viewing to a specific direction. When multiple users need to view the display simultaneously, the system switches to wide angle light emitting devices that expand the viewing cone. This dynamic switching allows the same display to serve different privacy and visibility requirements at different times.
Solution Approach 2:
The display is segmented into multiple pixel circuits with different light emitting devices, allowing simultaneous operation of narrow and wide angle modes in different regions. This segmentation enables the display to provide privacy protection in certain areas while maintaining wide visibility in other areas, resolving the contradiction between privacy and multi-user visibility by spatial segmentation rather than temporal switching.
Data Source
AI summary
A display device may include a first narrow angle control line for being electrically connected to a first viewing angle control circuit, a first wide angle control line for being electrically connected to the first viewing angle control circuit, and a first subpixel for being electrically connected to the first viewing angle control circuit, thereby controlling the viewing angle of a specific area of the display panel.