Display Panel Pixel Layout for Under-Display Optics

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing display panels face limitations in achieving a full-screen display design due to the presence of optical elements in notch regions or punch holes, which restrict the image display and require a reduction in pixel density, leading to reduced element lifespan and limited data voltage range.

Innovation Solution

A display panel design with varying pixel densities and luminance gradients, including a first region with high pixel density, a second region with lower pixel density, a boundary region with higher pixel density, and a transition region with gradual luminance changes, allowing for full-screen display by integrating optical elements below the display panel without reducing pixel density.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If optical elements are positioned in notch regions or punch holes, then the optical elements can be integrated into the display device, but the image display is restricted and pixel density must be reduced

Engineering Contradiction:

Improveintegration of optical elementsVSAvoidpixel density

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The patent transitions from planar integration (notch/punch hole) to three-dimensional integration by positioning optical elements below the display panel in a vertical arrangement. This allows the optical elements to be integrated without occupying screen real estate, thereby maintaining full-screen display capability and high pixel density while achieving optical element integration.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Adaptability or versatility

If pixel density is reduced to accommodate optical elements, then optical elements can be integrated, but element lifespan is reduced

Engineering Contradiction:

Improveintegration of optical elementsVSAvoidelement lifespan

Core Design Contradiction:

Adaptability or versatilityVSDuration of action of stationary object

Solution Approach 1:

By moving optical elements to a vertical position below the display panel, the patent eliminates the need to reduce pixel density, thereby preventing the associated reduction in element lifespan while still achieving optical element integration.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The patent divides the display device into distinct functional regions: a display region with high pixel density for image output and a separate optical element region below the panel. This segmentation allows each region to be optimized independently, maintaining high pixel density in the display region while accommodating optical elements in the lower region.

Inventive Principle:

Principle #1Segmentation

3Adaptability or versatility

If pixel density is reduced to accommodate optical elements, then optical elements can be integrated, but the range of available data voltages is limited

Engineering Contradiction:

Improveintegration of optical elementsVSAvoiddata voltage range

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The vertical integration approach eliminates the need to reduce pixel density, thereby preventing the limitation of data voltage range while achieving optical element integration.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

By separating the display function (requiring high pixel density and wide data voltage range) from the optical element function, the patent allows the display region to maintain its full voltage range capability without compromise from optical element integration requirements.

Inventive Principle:

Principle #1Segmentation

4Adaptability or versatility

If notch regions or punch holes are used for optical elements, then optical elements can be integrated, but full-screen display design cannot be achieved

Engineering Contradiction:

Improveintegration of optical elementsVSAvoiddisplay area

Core Design Contradiction:

Adaptability or versatilityVSArea of stationary object

Solution Approach 1:

The patent achieves full-screen display by positioning optical elements in the vertical dimension below the panel rather than removing areas from the horizontal display plane. This allows 100% of the screen area to be used for image display while optical elements are integrated in the space below.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Data Source

PatentUS20250374758A1Display panel and display device including the same

Publication Date: 2025.12.04 LG DISPLAY CO LTD

AI summary

A display panel and a display device including the same are discussed. The display panel in some example includes a first region including a plurality of pixels having a first pixel density, a second region including a plurality of pixels having a second pixel density lower than the first pixel density, a boundary region including a plurality of pixels having a third pixel density higher than the second pixel density and equal to the first pixel density, and including a plurality of unit emission regions in which a maximum value among luminance values of respective pixels gradually changes, and a transition region including a plurality of pixels having a fourth pixel density higher than the second pixel density and lower than the third pixel density. A boundary between the boundary region and the transition region includes an inflection point where a luminance gradient of pixels changes.