Display Device Blurring Area Shift for Oblique Viewing Contrast
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Solution Overview
Problem
Existing display devices face challenges in maintaining favorable display quality when viewed from oblique angles due to the positional relationship between the user's viewpoint and the liquid crystal display panel, as simply expanding the light control panel's light transmission area is insufficient to fully enhance image contrast.
Innovation Solution
A display device configuration that includes a first panel with pixels, a second panel with light control pixels, and a light source, where blurring processing is applied to multiple light control pixels to form a blurring area, shifting the center of this area relative to the normal line passing through the pixel controlled to transmit light, thereby improving image contrast and display quality across various viewing positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the area in which the light control panel transmits light is expanded, then the image can be visually recognized with favorable display quality from oblique viewpoints, but the image contrast cannot be fully enhanced depending on the positional relation between user viewpoint and the liquid crystal display panel
Solution Approach 1:
The patent applies different light transmission control strategies to different regions of the light control panel. Specifically, the light control pixels are divided into a first region (closer to the user) and a second region (farther from the user), with different light transmission characteristics applied to each region to optimize both viewing angle adaptability and image contrast for the assumed user viewpoint position.
Solution Approach 2:
The patent performs preliminary determination of the user viewpoint position and pre-calculates the optimal light transmission control for each light control pixel based on this assumed position. This preliminary action allows the display device to optimize image contrast and viewing quality in advance, rather than attempting to accommodate all possible viewing angles equally.
2Manufacturing precision
If blurring processing is applied to multiple light control pixels to form a blurring area, then display quality is improved by aligning with user viewpoint, but the positional precision of light control pixels is reduced
Solution Approach 1:
The patent changes the light transmission parameter of light control pixels dynamically based on their position relative to the determined user viewpoint. Pixels closer to the viewpoint position have higher light transmission, while pixels farther away have lower light transmission, creating a depth-aware blurring effect that improves display quality without completely losing positional information.
Solution Approach 2:
The patent applies blurring processing selectively rather than uniformly across all pixels. The blurring area is determined based on the assumed user viewpoint position, and only specific light control pixels within this area have their light transmission adjusted, rather than applying uniform blurring to the entire panel.
Data Source
AI summary
According to an aspect, a display device includes: a first panel including pixels; a second panel including light control pixels; and a light source. When any of the pixels is controlled to transmit light in accordance with an input image signal, blurring processing is applied, a blurring area is formed, and light from the light source transmits through the blurring area and the pixel controlled to transmit light and is emitted from the first panel. When a straight line connecting a user viewpoint and the pixel controlled to transmit light has an angle relative to a normal to the first panel, a center of the blurring area is at a position shifted to a side opposite to a reference normal side relative to the normal to the first panel passing through a center of the pixel. The reference normal is a normal to the first panel passing through the viewpoint.