UV Sensing Transistor Integration in Display Panels

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Solution Overview

Problem

Conventional display panels with ultraviolet light monitoring functions have complex structures, require multiple manufacturing processes, and are not thin enough, while visible light interference prevents accurate ultraviolet sensing.

Innovation Solution

A display panel design that integrates ultraviolet sensing transistors and control transistors on an array substrate, with a color film substrate featuring a light blocking unit that covers the ultraviolet absorbing layer, simplifying the structure and process while preventing visible light interference.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the ultraviolet sensor is provided outside the display panel, then the display panel can detect ultraviolet radiation intensity, but the structure becomes complex and the manufacturing process becomes numerous

Engineering Contradiction:

Improveultraviolet detection capabilityVSAvoidstructure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent integrates the ultraviolet sensor directly into the display panel structure by incorporating an ultraviolet absorbing layer within the existing multi-layer construction. This merging of functions eliminates the need for separate external sensors, thereby reducing structural complexity while maintaining ultraviolet detection capability.

Inventive Principle:

Principle #5Merging (Combining)

2Reliability

If the ultraviolet sensor is provided outside the display panel, then the display panel can detect ultraviolet radiation intensity, but the display panel thickness increases

Engineering Contradiction:

Improveultraviolet detection capabilityVSAvoidpanel thickness

Core Design Contradiction:

ReliabilityVSLength of stationary object

Solution Approach 1:

The ultraviolet absorbing layer is nested within the existing display panel layers, specifically integrated among the substrate, color film substrate, and organic layers. This nesting approach allows the ultraviolet sensing function to be embedded without adding external thickness, maintaining the panel's thin profile.

Inventive Principle:

Principle #7Nested doll (Nesting)

3Reliability

If the ultraviolet sensor is provided outside the display panel, then the display panel can detect ultraviolet radiation intensity, but visible light enters the ultraviolet sensor causing inaccurate monitoring

Engineering Contradiction:

Improveultraviolet detection capabilityVSAvoidultraviolet intensity monitoring accuracy

Core Design Contradiction:

ReliabilityVSMeasurement precision

Solution Approach 1:

The patent applies selective light absorption properties to different layers: the ultraviolet absorbing layer specifically absorbs ultraviolet light while the color film substrate with its color resistances (red, green, blue) selectively blocks visible light wavelengths. This local quality differentiation ensures that only ultraviolet radiation reaches the sensing transistor, eliminating visible light interference and improving measurement precision.

Inventive Principle:

Principle #3Local quality

4Device complexity

If the display panel structure is simplified by integrating components, then manufacturing processes are reduced, but visible light interference with ultraviolet sensing increases

Engineering Contradiction:

Improvestructure simplicityVSAvoidultraviolet sensing accuracy

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

The patent employs composite material structures including the color film substrate composed of multiple color resistance layers (red, green, blue) combined with the ultraviolet absorbing layer. This composite structure provides both structural integration for simplicity and selective optical properties that block visible light while transmitting ultraviolet light, thereby maintaining sensing accuracy despite structural simplification.

Inventive Principle:

Principle #40Composite materials

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 integrated design results in a simpler, lighter, and thinner display panel with improved precision in monitoring ultraviolet light, as visible light is effectively blocked from interfering with the ultraviolet sensing transistor.

Implementation Method 1

the ultraviolet sensing transistor includes an ultraviolet absorbing layer

Methodology Applied

Scientific EffectAbsorption (EM radiation): Absorption (EM radiation)

Implementation Method 2

the color film substrate includes a light blocking unit, wherein an orthographic projection of the light blocking unit on the substrate covers an orthographic projection of the ultraviolet absorbing layer on the substrate

Methodology Applied

Scientific EffectAbsorption (EM radiation): Absorption (EM radiation)

Data Source

PatentUS12276888B2Display panel and display terminal

Publication Date: 2025.04.15 WUHAN CHINA STAR OPTOELECTRONICS TECH CO LTD

AI summary

Embodiments of the present disclosure provide a display panel and a display terminal. The display panel includes at least one ultraviolet sensing transistor and at least one control transistor disposed on a substrate, and a color film substrate including a light blocking unit; wherein the ultraviolet sensing transistor includes an ultraviolet absorbing layer, and an orthographic projection of the light blocking unit on the substrate covers an orthographic projection of the ultraviolet absorbing layer on the substrate. According to the embodiment of the present disclosure, the light blocking unit absorbs or blocks the visible lights to prevent the visible lights from entering into the ultraviolet absorbing layer.