Display Device Blurring Processing for Misalignment
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Solution Overview
Problem
Positional misalignment between liquid crystal display panels and dimming panels in display devices leads to uneven light transmission, resulting in brightness issues due to inaccurate control of dimming panels.
Innovation Solution
A display device configuration where a dimming panel with arranged dimming pixels is positioned to face a display panel, applying blurring processing to multiple dimming pixels overlapping a pixel to form a blurring area for balanced light transmission, determined based on the positional misalignment between the display and dimming areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If conventional control is applied to the dimming panel assuming accurate positional alignment, then the control system remains simple, but brightness uniformity deteriorates due to positional misalignment
Solution Approach 1:
The patent applies blurring processing in advance to the image signal before it reaches the dimming panel. This preliminary action creates a blurred version of the original image that compensates for potential positional misalignment, allowing the dimming panel to display uniform brightness even when pixels are not perfectly aligned with dimming pixels.
Solution Approach 2:
The patent changes the spatial frequency parameters of the image signal by applying blurring processing. This transforms high-frequency details into lower-frequency patterns that are more tolerant of positional misalignment, thereby improving brightness uniformity without increasing control system complexity.
2Illumination intensity
If blurring processing is applied to multiple dimming pixels to compensate for positional misalignment, then brightness uniformity improves, but the area requiring light transmission control increases
Solution Approach 1:
The patent applies blurring processing with locally adapted kernels that consider the specific positional misalignment characteristics of different regions. By adjusting the blur radius and pattern locally rather than uniformly across the entire display, the patent achieves brightness uniformity while minimizing the effective blurring area.
3Measurement precision
If precise pixel-to-dimming pixel alignment is required, then brightness control accuracy improves, but manufacturing precision requirements increase
Solution Approach 1:
The patent converts the harmful effect of positional misalignment into a beneficial feature by deliberately applying blurring processing. Instead of trying to eliminate misalignment through high manufacturing precision, the patent embraces it and uses blurring to compensate, thereby reducing manufacturing precision requirements while maintaining brightness control accuracy.
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 ensures consistent brightness across the display by adjusting the blurring area to compensate for positional misalignment, preventing brightness deficiencies and maintaining image quality.
Implementation Method 1
a liquid crystal layer LC1 disposed between the array substrate 30a and the counter substrate 30b
Data Source
AI summary
According to an aspect, a display device includes: a display panel having a display area provided with pixels; a dimming panel disposed so as to face the display panel and having a dimming area provided with dimming pixels; and a light source configured to emit light that travels from the dimming panel toward the display panel. When a pixel among the pixels is controlled to be lit up in white, blurring processing is applied so as to cause more than one of the dimming pixels including a dimming pixel overlapping the pixel to transmit light, and light from the light source is transmitted through the blurring area and the pixel. The blurring area is determined based on a positional misalignment with respect to a predetermined positional relation between the display area and the dimming area.