LCD Drive Voltage Generator Integration on PCB
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Solution Overview
Problem
Conventional Liquid Crystal Displays (LCDs) have a complex drive power supply structure due to the need for different voltage levels for various components, complicating manufacturing processes and increasing costs.
Innovation Solution
A liquid crystal display with a drive voltage generator integrated on a source printed circuit board or control printed circuit board that converts external power to generate different voltage levels required for gate and data integrated circuits, the timing controller, and the backlight drive unit, simplifying the internal power supply structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate external power supply units are used for backlight unit and drive circuits, then each component receives required drive powers, but the structure for generating and supplying drive powers becomes complicated
Solution Approach 1:
The patent combines multiple separate power supply units into a single integrated power supply unit that provides all necessary drive powers to the backlight unit, gate drive circuit, and data drive circuit. This merging eliminates the need for separate power supply structures while ensuring reliable power delivery to all components, thus resolving the contradiction between power supply reliability and structural complexity.
Solution Approach 2:
The integrated power supply unit is designed to perform multiple functions by generating different voltage levels (e.g., high voltage for backlight, low voltage for drive circuits) from a single input power source. This multi-functional design allows one power supply unit to replace multiple specialized units, reducing overall system complexity while maintaining the reliability needed for each specific component.
2Adaptability or versatility
If multiple separate power supply units are provided for different voltage levels, then drive powers of different voltage levels are generated, but manufacturing processes and costs increase
Solution Approach 1:
The integrated power supply unit incorporates multiple voltage generation circuits within a single device, enabling it to adapt to different voltage requirements (high voltage for backlight, low voltage for drive circuits) without requiring separate power supply units. This multi-functionality maintains voltage level adaptability while significantly simplifying the manufacturing process and reducing production costs.
Solution Approach 2:
By merging multiple voltage generation functions into a single integrated power supply unit, the patent reduces the number of discrete components that need to be manufactured and assembled. This consolidation streamlines the manufacturing process, reduces assembly steps, and lowers overall production costs while preserving the ability to provide multiple voltage levels.
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 simplification of the drive power supply structure reduces manufacturing complexity and costs by providing all necessary drive voltages internally, enhancing the manufacturing efficiency of LCDs.
Implementation Method 1
a drive voltage generator provided on a system or at least one source printed circuit board on which at least one of the drive unit or the controller is formed, the drive voltage generator converting a voltage level of a drive power received from outside to generate respective drive powers of different voltage levels
Data Source
AI summary
An LCD has a drive power supply structure simplified to simplify manufacturing processes of LCDs and to reduce manufacturing costs thereof. The LCD includes a liquid crystal panel, a drive unit, a controller, a backlight drive unit, and a drive voltage generator. The liquid crystal panel includes image display regions. The drive unit drives gate and data lines in the panel. The controller controls the drive unit using image data and synchronization signals from outside. The drive voltage generator is provided on a system or at least one source printed circuit board on which at least one of the drive unit or the controller is formed and converts a voltage level of a drive power provided from outside to generate drive powers of different voltage levels and provides the drive powers to the drive unit, the controller, and the backlight drive unit.