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

VSEngineering 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

Engineering Contradiction:
Improvereflective displaying brightnessVSAvoidcolor uniformity
Core Design Contradiction:
Illumination intensityVSReliability

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.

Inventive Principle:
Principle #1Segmentation

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.

Inventive Principle:
Principle #3Local quality

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

Engineering Contradiction:
Improvecolor uniformityVSAvoiddisplay region area
Core Design Contradiction:
ReliabilityVSArea of stationary object

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.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

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.

Inventive Principle:
Principle #3Local quality

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

Engineering Contradiction:
Improvecolor uniformityVSAvoidthrough-hole width control
Core Design Contradiction:
ReliabilityVSManufacturing precision

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.

Inventive Principle:
Principle #1Segmentation

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.

Inventive Principle:
Principle #35Parameter changes

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

Methodology Applied
Scientific EffectLight splitting: Refraction

Implementation Method 2

color filter layers each provided at at least the display region of each pixel

Methodology Applied
Scientific EffectColor filtering: Filter (optical)

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

Methodology Applied
Scientific EffectLight transmission: Refraction

Data Source

PatentUS10317688B2Display panel
Publication Date: 2019.06.11 TIANMA MICRO ELECTRONICS CO LTD
  • US10317688B2 patent drawing
  • US10317688B2 patent drawing
  • US10317688B2 patent drawing

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.