Display Device Polarizer Configuration for Narrow Frame and Clear Imaging
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Solution Overview
Problem
In electronic devices with both a display region and an imaging element on the same surface, there is a challenge in reducing the frame width outside the display region while maintaining space for the imaging element while ensuring clear image capture.
Innovation Solution
The electronic device incorporates a display panel with a liquid crystal layer between substrates, featuring a unique polarizer configuration where the transmission axes of certain polarizers form an angle other than 0° and 90°, allowing for a non-display region to be minimized and improving image quality by preventing light and shade issues from electrode patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the imaging element is installed outside the display region, then the device can capture images, but the frame width outside the display region increases
Solution Approach 1:
The patent merges the imaging element installation area with the display region by allowing the imaging element to be installed within or overlapping the display region, thereby eliminating the need for additional frame space outside the display region
Solution Approach 2:
The patent utilizes the vertical dimension by positioning the imaging element on the rear surface of the display panel, allowing the imaging element to share the same planar footprint as the display region without increasing the frame width
2Length of stationary object
If the non-display region is reduced to minimize frame width, then the frame width decreases, but light and shade artifacts from electrode patterns may appear
Solution Approach 1:
The patent applies different polarizer configurations to different regions: in the region overlapping the imaging element, the transmission axes of the polarizers are set at angles other than 0° or 90° relative to each other, which suppresses the visibility of electrode patterns and prevents light and shade artifacts
Solution Approach 2:
The patent changes the optical parameters by setting the transmission axes of polarizers at specific angles (other than 0° or 90°) in the imaging element region, which modifies the light transmission characteristics to eliminate artifacts while maintaining display performance
3Ease of manufacture
If the transmission axes of polarizers are set at 0° or 90°, then the display performance is optimized, but light and shade artifacts and blurring occur in the captured image
Solution Approach 1:
The patent implements different polarizer configurations for different functional regions: the display region uses conventional polarizer orientations for optimal display performance, while the imaging element region uses non-0°/90° orientations to prevent artifacts and blurring in captured images
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
This configuration enables a reduction in the non-display region frame width, enhancing image quality by suppressing light and shade artifacts and preventing blurring, thus improving the captured image quality.
Implementation Method 1
a liquid crystal layer held between the first substrate and the second substrate
Implementation Method 2
a first polarizer that overlaps the first region and is in contact with the first substrate; a second polarizer that overlaps the first region and is in contact with the second substrate
Data Source
AI summary
According to one embodiment, a display device comprises a liquid crystal layer held between a first substrate and a second substrate, a display region having a first region in which a plurality of pixels are provided, a non-display region provided in an island-like shape in the display region and having a second region, a first polarizer and a second polarizer that overlap the first region, and a third polarizer and a fourth polarizer that overlap the second region, wherein a transmission axis of the fourth polarizer and a transmission axis of the second polarizer form an angle other than 0° and other than 90° with each other.