Tape Package Lead Line Orientation for LCD Light-Blocking Area
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Solution Overview
Problem
In liquid crystal display (LCD) apparatuses, the size of the light-blocking area is increased due to the arrangement of data lines, which affects the display's size and efficiency.
Innovation Solution
A tape package design with a base substrate, integrated circuit (IC) chip, and lead lines, including a main and sub lead line configuration that extends in different directions, reducing the horizontal space required for data lines and improving display quality by allowing vertical data line arrangement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data lines are arranged horizontally to connect with the tape package, then electrical connection is achieved, but the light-blocking area increases
Solution Approach 1:
The patent changes the arrangement dimension of data lines from horizontal to vertical direction. The lead lines are configured to extend primarily in the vertical direction (first direction) rather than horizontally, allowing data lines to be arranged vertically on the light-blocking area. This dimensional change reduces the horizontal footprint while maintaining electrical connection functionality.
Solution Approach 2:
The lead lines are divided into multiple portions (first portion, second portion, third portion) with different orientations. The first portion extends in the first direction, the second portion extends in the second direction crossing the first direction, and the third portion extends in the first direction again. This segmentation allows the lead lines to navigate around the IC chip while minimizing the light-blocking area.
2Reliability
If multiple data lines are dispersed horizontally to connect with the tape package, then electrical connection is achieved, but the display quality deteriorates
Solution Approach 1:
The patent arranges multiple data lines in the vertical direction rather than dispersing them horizontally. This vertical arrangement maintains consistent line lengths and reduces variations in signal transmission, thereby improving display quality while achieving reliable electrical connection for multiple data lines.
3Reliability
If data lines extend horizontally to the tape package, then electrical connection is achieved, but the size of the display apparatus increases
Solution Approach 1:
The patent configures lead lines to extend primarily in the vertical direction (first direction) rather than horizontally, reducing the horizontal footprint of the display apparatus. The lead lines make minimal horizontal excursions only where necessary to connect to the IC chip, thereby minimizing the overall device size while maintaining electrical connection.
Data Source
AI summary
A tape package includes a base substrate including a signal transmitting area and a protruding area protruded from the signal transmitting area, an integrated circuit chip mounted on the base substrate, and a lead line disposed on the base substrate and including a first portion electrically connected with the integrated circuit chip, a second portion electrically connected with the first portion and extending in a first direction, and a third portion electrically connected with the second portion and extending in a second direction crossing the first direction.