Backlight PCB Conductive Patterns for LCD Cost Reduction
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Solution Overview
Problem
The manufacturing costs of LCD devices with scanning backlight systems increase due to the complexity of wire connections and the burden of individually driving multiple lamps, which is not efficiently managed by existing technologies.
Innovation Solution
The solution involves forming conductive patterns on balance printed circuit boards (PCBs) to individually drive light sources corresponding to specific areas of the liquid crystal panel, using separate conductive patterns and connectors to distribute driving voltages efficiently, thereby reducing the need for extensive wire connections and inverter coupling processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple lamps are individually driven using wire connections and external inverters, then scanning backlight driving is achieved preventing motion blurring, but manufacturing costs increase due to complex wire connections and inverter coupling processes
Solution Approach 1:
The patent combines the inverter and balance PCB into a single integrated structure. The conductive patterns are directly formed on the balance PCB, eliminating the need for separate wire connections and external inverter coupling processes. This integration maintains the scanning backlight driving capability while significantly simplifying the manufacturing process and reducing costs.
Solution Approach 2:
The balance PCB with conductive patterns serves as an intermediary component that distributes driving voltages to multiple lamps. Instead of using complex wire connections and external inverters, the conductive patterns on the balance PCB act as a mediator to efficiently transmit electrical signals to individual lamps, enabling scanning backlight driving with simplified infrastructure.
2Use of energy by moving object
If the number of lamps is increased to cover larger display areas, then light distribution efficiency is improved, but the complexity of wire connections and individual driving circuits increases
Solution Approach 1:
The patent transitions from one-dimensional wire connections to two-dimensional conductive patterns on the balance PCB. By forming conductive patterns across the surface of the balance PCB, the system can efficiently distribute driving voltages to multiple lamps arranged in arrays, enabling scalable light distribution without proportionally increasing connection complexity.
Solution Approach 2:
The balance PCB with conductive patterns serves multiple functions simultaneously: it provides structural support, distributes driving voltages to multiple lamps, and enables scanning backlight driving. This multi-functional design allows the system to handle increased numbers of lamps without requiring separate dedicated connection systems for each lamp.
Data Source
AI summary
A display device capable of driving a scanning backlight is disclosed. The display device forms a conductive pattern on a balance printed circuit board (PCB) and sequentially controls the on/off time of light sources without assigning driving units to each of the light sources. As such, the display device can drive the scanning backlight and reduce manufacturing costs.