Liquid Crystal Display Control PCB Size Reduction via Component Segmentation
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Solution Overview
Problem
The existing liquid crystal displays face challenges in achieving a thin profile due to the large number of circuit components, such as memory and interface circuits, mounted on the control PCB, which complicates size reduction.
Innovation Solution
The solution involves mounting at least a portion of the DC to DC converter's circuit configurations on the source PCB, reducing the size of the control PCB and allowing for a thinner profile by redistributing the circuitry, while maintaining adequate mounting space for the necessary components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If circuit components are mounted on the control PCB, then the control circuit functionality is achieved, but the control PCB size increases
Solution Approach 1:
The patent divides the control circuit functionality into two separate PCBs: the control PCB and the source PCB. By segmenting the circuit components, the control PCB can be reduced in size while the source PCB accommodates the additional components (DC to DC converter, memory, interface circuits). This segmentation resolves the contradiction by distributing components across multiple boards rather than consolidating them on a single control PCB.
Solution Approach 2:
The patent transitions from a single-plane component arrangement to a multi-dimensional distributed architecture. Circuit components are redistributed across two separate PCBs that connect to the liquid crystal display panel, effectively using the spatial dimension of multiple boards to resolve the area constraint on the control PCB while maintaining all necessary functionality.
2Length of stationary object
If the control PCB size is reduced, then the thin profile is achieved, but the mounting space for circuit components is insufficient
Solution Approach 1:
By segmenting the PCB system into control PCB and source PCB, the patent allows the control PCB to be minimized for thin profile while the source PCB provides additional mounting space for components that require more area, such as the DC to DC converter and memory circuits.
Solution Approach 2:
The solution moves from a two-dimensional area constraint on a single PCB to a three-dimensional multi-PCB architecture, where components are distributed across multiple boards in space, thereby providing sufficient mounting space without increasing the overall display thickness.
3Device complexity
If all circuit components are integrated on one PCB, then the device complexity is reduced, but the PCB area increases
Solution Approach 1:
The patent applies segmentation by dividing the circuit components into two functional groups: control circuit components on the control PCB and power/conversion components on the source PCB. This segmentation maintains relatively simple individual PCB designs while distributing the total component count across two smaller boards rather than one large board.
Data Source
AI summary
A liquid crystal display is disclosed. The liquid crystal display includes a liquid crystal display panel on which a plurality of data lines and a plurality of gate lines are positioned to cross one another and a plurality of liquid crystal cells driven according to a voltage difference between a data voltage and a common voltage are positioned in a matrix format, a side printed circuit board (PCB) connected to the side of the liquid crystal display panel, and a DC to DC converter that is mounted on the side PCB to produce a driving voltage of the liquid crystal display panel.