Display Viewing-Angle Control Using Segmented Light Units
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Solution Overview
Problem
Existing display devices do not effectively limit the viewing angle, which can be a safety concern in applications like vehicle dashboards, where content should not be visible to the driver.
Innovation Solution
A display device comprising a substrate with a light emitting package including first, second, and third light emitting units, where the second light emitting units, equipped with a light control unit such as a louver or lens, are arranged to limit the viewing angle in specific areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display device provides full viewing angle coverage, then all users can see the content, but drivers can also see the content causing safety concerns
Solution Approach 1:
The display device is divided into multiple light emitting units (first, second, and third light emitting units) with different light control characteristics. The second light emitting units are specifically configured with light control units to limit their viewing angles, while other units maintain broader viewing angles. This segmentation allows different portions of the display to serve different viewing requirements simultaneously.
Solution Approach 2:
Different regions of the display device are assigned different light control properties. Specifically, the second light emitting units located in certain areas have restricted viewing angles to prevent driver visibility, while first and third light emitting units in other areas maintain unrestricted viewing angles for passenger visibility. This local differentiation of optical properties resolves the contradiction between universal accessibility and targeted restriction.
2Object-affected harmful factors
If light control units are added to limit viewing angle, then driver visibility is blocked, but device complexity increases
Solution Approach 1:
Light control units are introduced as intermediary components between the light emitting chips and the external environment. These units selectively control the path of light without requiring fundamental changes to the display panel or light source technology. The light control units act as mediators that redirect or block light based on viewing angle, achieving driver visibility control with minimal disruption to the overall device architecture.
Solution Approach 2:
The light control units serve multiple functions: they limit viewing angles for driver safety, maintain display brightness for passengers, and can potentially be controlled dynamically based on detected viewing conditions. By designing these units to perform multiple functions simultaneously, the patent reduces the need for separate specialized components, thereby managing device complexity more effectively.
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 display device effectively limits the viewing angle, ensuring that content is only visible to intended users, such as passengers, while preventing the driver from seeing the content, thus enhancing safety.
Implementation Method 1
a light control unit disposed on the light emitting chip
Implementation Method 2
a light control unit such as a louver or lens
Data Source
AI summary
A display device can include a light emitting package disposed in a first area on a substrate, where the light emitting package includes at least one first light emitting unit and a plurality of second light emitting units. The display device further includes at least one third light emitting unit disposed in a second area being adjacent to the first area, and a display panel disposed on the light emitting package and the at least one third light emitting unit. Each of the plurality of second light emitting units includes a light emitting chip and a light control unit disposed on the light emitting chip. Further, the light control unit is configured to change a path of light emitted from the light emitting chip.