Translucent Display Panel Color Filter Through-Holes
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Solution Overview
Problem
When combining three-dimensional image display devices with semi-transmissive type liquid crystal display devices, color density changes with viewing angle and external light conditions, leading to partial discoloration and color aberrations.
Innovation Solution
A semi-transmissive type liquid crystal display panel with a matrix arrangement of pixels for different viewpoints, an optical member for splitting light, and through-holes at the color filter layer, where the through-holes are wider than the display region and can be positioned differently across pixels to reduce the influence of color aberrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a semi-transmissive type liquid crystal display panel is used for three-dimensional image display, then the display can utilize external light for reflective displaying, but color density changes with viewing angle and external light conditions causing color aberrations
Solution Approach 1:
The color filter layer is divided into multiple regions with different optical characteristics. Specifically, the color filter layer includes a first region with a first color filter and a second region with a second color filter having different optical properties. This segmentation allows different parts of the display to handle light differently, compensating for viewing angle effects and external light condition variations to maintain color uniformity across the reflective display surface.
Solution Approach 2:
Different regions of the color filter layer are assigned different local optical properties to address specific viewing angle issues in different areas. The first color filter and second color filter have different characteristics optimized for their respective regions, allowing each local area to compensate for its specific viewing angle and external light conditions, thereby achieving overall color uniformity across the entire display panel.
2Reliability
If through-holes are formed at the color filter layer to reduce their influence, then color aberrations are suppressed, but the display region area is reduced
Solution Approach 1:
Instead of simply enlarging through-holes in the traditional plane, the invention introduces a dimensional variation by creating through-holes with different sizes, shapes, or positions in different regions of the color filter layer. This dimensional approach allows the through-holes to be optimized for reducing color aberrations while minimizing their impact on the overall display region area, as the through-holes are strategically placed and sized rather than uniformly distributed.
Solution Approach 2:
The through-holes are not uniformly distributed but are strategically placed in specific regions where they are most needed to reduce color aberrations. The color filter layer includes regions with through-holes and regions without through-holes, or with differently sized through-holes, allowing the display region area to be maximized in areas where through-holes are not required for color uniformity correction.
3Reliability
If the width of through-holes is increased to be equal to or greater than the display region width, then the influence of through-holes is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The color filter layer is segmented into multiple regions with different through-hole configurations. Instead of requiring all through-holes to have the same large width, different regions have through-holes with different widths, shapes, or positions. This segmentation reduces the overall manufacturing precision requirement because not all through-holes need to meet the same stringent width specifications, while still achieving color uniformity through the combined effect of multiple regions.
Solution Approach 2:
The invention varies parameters of the through-holes (width, shape, position, depth) across different regions of the color filter layer. By changing these parameters strategically, the design achieves color uniformity without requiring all through-holes to have uniformly large dimensions, thereby reducing the overall manufacturing precision burden while maintaining the effectiveness of through-hole influence reduction.
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 suppresses color aberrations caused by viewing angle and external light conditions, improving displaying quality and uniformity by reducing the impact of through-holes and allowing for bright reflective displaying.
Implementation Method 1
an optical member, for splitting in mutually different directions light emitted from each pixel within the display unit provided along a first direction
Implementation Method 2
color filter layers each provided at at least the display region of each pixel
Implementation Method 3
a through-hole provided at the color filter layer of each pixel of the width of the through-hole in the first direction is the width of the display region or more
Data Source
AI summary
A translucent liquid crystal display panel (2) includes pixel pairs as display units each formed by a left-eye pixel (4L) and a right-eye pixel (4R) and arranged in a matrix shape. A through hole (4Ld) arranged in a color layer (4Lc) of a color filter has a slit shape whose longitudinal direction is identical to the orientation direction of a cylindrical lens (3a) constituting a lenticular lens (3). Similarly, a through hole (4Rd) arranged in a color layer (4Rc) of a color filter has a slit shape whose longitudinal direction is identical to the orientation direction of the cylindrical lens (3a) constituting the lenticular lens (3). This suppresses the phenomenon that a hue is changed by a field-of-view angle and/or an external light condition on the translucent display panel capable of displaying an image directed to a plurality of viewpoints.


