Head-Up Display Barrier Layout for Brighter Low-Crosstalk 3D
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Solution Overview
Problem
Conventional head-up displays with liquid crystal panels face a decline in light transmittance due to the black matrix around pixels, which limits the ability to project high-quality stereoscopic images with reduced crosstalk and enhanced image quality.
Innovation Solution
A head-up display design that incorporates a barrier with alternating light-transmitting and light-blocking regions, where the barrier pitch is equal to the binocular dot group pitch, allowing for increased subpixel size and improved light transmittance, thereby reducing crosstalk and enhancing image brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a liquid crystal panel with black matrix around pixels is used as a barrier, then stereoscopic vision can be provided, but light transmittance declines
Solution Approach 1:
The invention extracts and removes the black matrix component from the barrier structure. By using a liquid crystal panel without black matrix around pixels, the harmful light-blocking element is eliminated while preserving the stereoscopic vision function through the liquid crystal shutter mechanism alone.
Solution Approach 2:
The invention employs a pixel structure without black matrix material, creating a more open, porous-like structure that allows light to pass through more freely. This removes the light-blocking substance while maintaining the functional structure needed for stereoscopic display.
2Measurement precision
If barrier pitch is reduced to decrease crosstalk, then stereoscopic separation improves, but subpixel size must be reduced lowering light transmittance
Solution Approach 1:
The invention changes the key parameter of barrier pitch to be equal to binocular dot group pitch, rather than using a smaller pitch. This parameter change allows subpixel size to be increased while maintaining stereoscopic separation, thereby improving light transmittance without sacrificing crosstalk reduction.
3Shape
If black matrix is used to define pixel boundaries, then image structure is maintained, but light transmittance and image brightness are reduced
Solution Approach 1:
The invention extracts and removes the black matrix from the pixel structure. Pixel boundaries are maintained through the liquid crystal shutter control and adjacent pixel arrangements rather than physical black matrix barriers, eliminating the light-blocking element while preserving structural definition.
4Reliability
If conventional barrier design is used, then stereoscopic vision is provided, but component costs are increased due to different pixel configurations
Solution Approach 1:
The invention makes the barrier liquid crystal panel use the same pixel configuration and structure as the display device. This universal design allows both components to share the same manufacturing process, reducing component costs while maintaining stereoscopic vision functionality through the barrier's liquid crystal shutter control.
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 solution enhances light transmittance and reduces crosstalk, resulting in improved image quality and brightness for stereoscopic vision, while also allowing for shared pixel configurations between the display device and the barrier, lowering component costs.
Implementation Method 1
The optical system 30 focuses image light corresponding to a parallax image to project the parallax image to user's eyes
Implementation Method 2
the barrier 20 blocks part of image light, so that different images can be projected to left and right eyes 5L and 5R of the user
Implementation Method 3
the first optical members distributing light between a right-eye direction and a left-eye direction
Implementation Method 4
a second optical member configured to reflect or refract the light distributed between the right-eye direction and the left-eye direction by the first optical members
Implementation Method 5
a second optical member configured to reflect or refract the light distributed between the right-eye direction and the left-eye direction by the first optical members
Data Source
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AI summary
A head-up display includes a first panel, a second panel, and an optical system. The first panel includes first subpixels arranged at a first pitch in a parallax direction, in which direction binocular parallax is provided to user's eyes. The second panel includes second subpixels arranged at a second pitch in the parallax direction. The second panel is placed along the first panel. The second panel is configured to produce, based on an image displayed on the first panel, a parallax image for providing binocular parallax to the user's eyes. The optical system enables the parallax image to be provided in enlarged dimension to the user's eyes. The first pitch and the second pitch are equal to each other.