Integrating TFT Backlight Drivers on Array Substrates
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Solution Overview
Problem
Current display technologies face high manufacturing costs due to complex circuit structures, particularly in ultra-thin multi-partition displays using mini-LED backlights, where the active matrix driving method requires costly glass substrates and printed circuit boards.
Innovation Solution
Replacing the printed circuit board substrate with a TFT circuit or serial-parallel circuit formed on the outer surfaces of a color filter and transistor substrates, where a light-emitting diode is mounted and forwardly emitted, reflected, and used as a backlight source, simplifying the circuit structure and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a printed circuit board substrate is used in the backlight with active matrix driving method, then the display achieves high brightness and multi-partition capabilities, but the manufacturing cost increases due to complex circuit structure
Solution Approach 1:
The patent merges the backlight driving circuit with the array substrate by forming TFT circuits directly on the array substrate surface. This integration eliminates the need for separate printed circuit board substrates and external driving circuits, thereby simplifying the overall circuit structure while maintaining the backlight's high brightness and multi-partition capabilities through the integrated active matrix driving method
Solution Approach 2:
The array substrate is designed to serve dual functions: as the liquid crystal control substrate and as the backlight driving circuit substrate. By forming TFT circuits on the array substrate, it simultaneously performs liquid crystal switching control and backlight LED driving, reducing the need for separate circuit boards and components, thus lowering manufacturing cost while preserving display performance
2Adaptability or versatility
If a printed circuit board substrate is used in the backlight, then the display achieves multi-partition capabilities, but the manufacturing cost increases
Solution Approach 1:
The patent combines the backlight driving circuit functionality with the array substrate by forming TFT circuits directly on it. This merger eliminates the need for separate printed circuit board substrates and external driving circuits, thereby simplifying the overall circuit structure while maintaining the backlight's high brightness and multi-partition capabilities through the integrated active matrix driving method
Solution Approach 2:
The patent extracts the backlight driving circuit from the traditional separate printed circuit board and relocates it directly onto the array substrate. This extraction and relocation of the driving circuit function to the substrate level eliminates unnecessary intermediate components and assembly steps, reducing manufacturing complexity and cost while preserving multi-partition display capabilities
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 approach reduces manufacturing costs by simplifying the circuit structure and integrating the LED with the panel, while maintaining high brightness and multi-partition capabilities in ultra-thin displays.
Implementation Method 1
a surface of a light emitting diode (LED) is mounted on the color filter (CF) substrate and the transistor (TFT) substrate, wherein the LED is forwardly emitted
Implementation Method 2
reflected by a reflector to passes through the color filter (CF) substrate and the transistor (TFT) substrate
Data Source
AI summary
The present invention provides a display, the display includes: an array substrate; a color filter substrate disposed above the array substrate; a backlight disposed on the color filter substrate; and a reflector disposed on the backlight.