Display Panel Anode Structure for Camera Integration

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Solution Overview

Problem

In display panels with integrated camera modules, the reduced pixel density in the camera area leads to higher current density, causing accelerated pixel aging and uneven display, resulting in deteriorated appearance and afterimages.

Innovation Solution

A display panel design with a first display area having a lower pixel density than a second display area, where the first pixel units include a reflective metal layer and a transparent conductive layer stacked on each other, with the reflective metal layer's area being smaller than the transparent conductive layer's, to enhance light transmittance and reduce current density, thereby improving display uniformity and extending the service life of the pixels.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the pixel density is reduced in the camera area to allow camera module integration, then the camera function can be integrated into the display area, but the current density increases causing accelerated pixel aging and uneven display

Engineering Contradiction:

Improvecamera integrationVSAvoidpixel aging

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent applies local quality by differentiating the anode structure between first pixel units (in camera area) and second pixel units (in non-camera area). The first pixel units have a reflective metal layer with smaller area than the transparent conductive layer, while second pixel units have equal area reflective metal layer and transparent conductive layer. This local structural differentiation allows the camera area to have lower current density and reduced pixel aging, while maintaining normal display function in non-camera areas.

Inventive Principle:

Principle #3Local quality

2Adaptability or versatility

If the pixel density is reduced in the camera area to allow camera module integration, then the camera function can be integrated into the display area, but the display uniformity deteriorates due to uneven current distribution

Engineering Contradiction:

Improvecamera integrationVSAvoiddisplay uniformity

Core Design Contradiction:

Adaptability or versatilityVSStability of the object's composition

Solution Approach 1:

The patent implements local quality by creating distinct anode structures for different display regions. First pixel units in the camera area have a reflective metal layer whose area is smaller than the transparent conductive layer, while second pixel units in non-camera areas have equal area reflective metal layer and transparent conductive layer. This localized structural variation compensates for the reduced pixel density in the camera area, ensuring uniform current distribution and consistent display quality across the entire panel.

Inventive Principle:

Principle #3Local quality

3Illumination intensity

If the reflective metal layer area is reduced in first pixel units, then the light transmittance is improved for camera functionality, but the current carrying capacity may be affected

Engineering Contradiction:

Improvelight transmittanceVSAvoidcurrent carrying capacity

Core Design Contradiction:

Illumination intensityVSPower

Solution Approach 1:

The patent applies parameter changes by modifying the area ratio between the reflective metal layer and transparent conductive layer in the anode structure. In first pixel units (camera area), the reflective metal layer area is made smaller than the transparent conductive layer area, increasing light transmittance for camera functionality. In second pixel units (non-camera area), the areas are equal to maintain normal current carrying capacity. This parameter differentiation resolves the contradiction between light transmittance and current carrying capacity in different display regions.

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

The solution improves light transmittance in the camera area, ensures uniform display across the panel, and extends the service life of the pixels by maintaining balanced current density, thus addressing the issues of pixel aging and display uniformity.

Implementation Method 1

the first anode includes a first reflective metal layer and a first transparent conductive layer, and the first reflective metal layer and the first transparent conductive layer are stacked on each other

Methodology Applied

Scientific EffectReflection: Reflection

Implementation Method 2

a first transparent conductive layer, and the first reflective metal layer and the first transparent conductive layer are stacked on each other

Methodology Applied

Scientific EffectTransparency:

Data Source

PatentUS11367851B2Display panel and display device

Publication Date: 2022.06.21 WUHAN TIANMA MICRO ELECTRONICS CO LTD

AI summary

A display panel and a display device including the display panel are provided. The display panel includes first pixel units arranged in a first display area and second pixel units arranged in a second display area, a density of the first pixel units in the first display area is smaller than a density of the second pixel units in the second display area, each of the first pixel units includes a first anode comprising a first reflective metal layer and a first transparent conductive layer, the first reflective metal layer and the first transparent conductive layer are stacked on each other, and an area of the first reflective metal layer is smaller than an area of the first transparent conductive layer.