Array Substrate Photosensitive Structure Auto-Brightness Cost Reduction

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Solution Overview

Problem

Conventional display devices require an external photosensitive unit to sense light intensity for auto-brightness adjustment, which increases costs.

Innovation Solution

An array substrate with a photosensitive structure integrated on the base substrate, connected to a thin film transistor and common electrode, allows for internal light intensity sensing, eliminating the need for external units.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If an external photosensitive unit is mounted on the housing to sense light intensity for auto-brightness adjustment, then the display device can achieve auto-brightness adjustment functionality, but the cost increases

Engineering Contradiction:

Improveauto-brightness adjustment functionalityVSAvoidcost

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The patent combines the photosensitive structure with the array substrate, integrating the light sensing function into the display device itself. The photosensitive structure includes a photosensitive layer and electrode arranged on the array substrate, allowing the display device to sense external light intensity and adjust brightness without requiring separate external photosensitive units, thereby reducing cost while maintaining functionality

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The array substrate serves multiple functions: it acts as both the display control substrate and the light sensing component. The photosensitive structure integrated on the array substrate enables the substrate to perform both display signal processing and environmental light detection, eliminating the need for dedicated external sensing components

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 integration reduces costs while maintaining auto-brightness adjustment functionality by using the photosensitive structure to generate photocurrent for controlling display brightness.

Implementation Method 1

a photosensitive structure, which is connected with a drain electrode of the thin film transistor and configured to sense light intensity outside

Methodology Applied

Scientific EffectPhotoelectric Effect: Photoelectric Effect

Data Source

PatentUS10629164B2Array substrate, manufacturing method thereof, control method, control assembly, and display device

Publication Date: 2020.04.21 BOE TECHNOLOGY GROUP CO LTD

AI summary

An array substrate includes a base substrate, a thin film transistor and at least one photosensitive structure formed on the base substrate, the at least one photosensitive structure electrically connected to a drain electrode of the thin film transistor and configured to sense light intensity outside, and a common electrode formed on the base substrate on which the thin film transistor and the at least one photosensitive structure are formed. A method for manufacturing the array substrate, a control assembly and a display device are further disclosed.