Display Color Filter Thickness Layout for Uniform Luminance

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Solution Overview

Problem

Existing electronic devices face challenges in achieving uniform luminance and lifespan across areas with and without electronic modules due to differences in transmittance and pixel configurations.

Innovation Solution

The implementation of a display panel with varying color filter layer thicknesses, where the area overlapping electronic modules has a thinner color filter layer than other areas, enhancing light transmittance and ensuring uniform luminance and lifespan.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the color filter layer thickness is uniform across the entire display panel, then the manufacturing process is simple, but the luminance and lifespan are not uniform in areas with and without electronic modules

Engineering Contradiction:

Improveuniform lifespanVSAvoidcolor filter layer structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies local quality by making the color filter layer thickness different in different regions: the first color filter layer in the first area (with electronic module) has a first thickness, while the second color filter layer in the second area (without electronic module) has a second thickness greater than the first thickness. This regional differentiation compensates for the transmittance difference caused by the electronic module, achieving uniform luminance and lifespan across the display panel.

Inventive Principle:

Principle #3Local quality

2Illumination intensity

If the color filter layer is made thinner to improve light transmittance, then the luminance in the electronic module area improves, but the lifespan uniformity across the display panel deteriorates

Engineering Contradiction:

ImproveluminanceVSAvoidlifespan uniformity

Core Design Contradiction:

Illumination intensityVSReliability

Solution Approach 1:

The patent uses local quality to adjust color filter layer thickness according to regional requirements: thinner in the electronic module area to improve transmittance and luminance, thicker in other areas to maintain appropriate lifespan. This regional optimization achieves both improved luminance in the electronic module area and uniform lifespan across the entire display panel.

Inventive Principle:

Principle #3Local quality

3Duration of action of stationary object

If the color filter layer thickness is increased to improve lifespan, then the lifespan in non-electronic module areas improves, but the luminance in electronic module areas deteriorates

Engineering Contradiction:

ImprovelifespanVSAvoidluminance

Core Design Contradiction:

Duration of action of stationary objectVSIllumination intensity

Solution Approach 1:

The patent applies local quality by differentiating color filter layer thickness: the second color filter layer in the second area (without electronic module) has a greater thickness to extend lifespan, while the first color filter layer in the first area (with electronic module) has a smaller thickness to maintain luminance. This regional differentiation simultaneously achieves both goals.

Inventive Principle:

Principle #3Local quality

4Ease of manufacture

If the display panel uses a uniform structure without considering electronic module placement, then the manufacturing process is simple, but the transmittance and performance vary across different areas

Engineering Contradiction:

Improvemanufacturing simplicityVSAvoidtransmittance uniformity

Core Design Contradiction:

Ease of manufactureVSManufacturing precision

Solution Approach 1:

The patent resolves this contradiction by implementing local quality through region-specific color filter layer thickness design. The first area containing the electronic module uses a thinner first color filter layer, while the second area uses a thicker second color filter layer. This approach maintains manufacturing feasibility while achieving transmittance uniformity and consistent performance across different display areas.

Inventive Principle:

Principle #3Local quality

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 design improves light transmittance in areas with electronic modules, leading to a uniform luminous lifespan across the entire display area, reducing the bezel area and enhancing overall display performance.

Implementation Method 1

A thickness of the first color filter layer may be smaller than a thickness of the second color filter layer... the first area having a transmittance higher than a transmittance of the second area

Methodology Applied

Scientific EffectLight transmittance: Refraction

Data Source

PatentUS12532633B2Display device with region-specific color filter thickness for uniform luminance

Publication Date: 2026.01.20 SAMSUNG DISPLAY CO LTD

AI summary

An electronic device includes a display panel including a first area including a light blocking area and a transmission area, a first pixel disposed in the first area, a second area adjacent to the first area, and a second pixel disposed in the second area, an input sensor disposed on the display panel, the input sensor including at least one insulating layer and a conductive layer, a black matrix disposed on the at least one insulating layer, a first color filter layer disposed on the at least one insulating layer, the first color filter overlapping the first pixel in a plan view, and a second color filter layer disposed on the at least one insulating layer, the second color filter overlapping the second pixel in a plan view. A thickness of the first color filter layer is smaller than a thickness of the second color filter layer.