Driver-Side Control Wiring to Reduce Display Frame Width
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Solution Overview
Problem
Existing display devices face issues with increased load on control wiring lines and widened frames due to long wiring line lengths, particularly in liquid crystal display devices where input and control signal wiring lines are routed across IC regions or end portions, necessitating additional space and widening the non-display region.
Innovation Solution
The display device incorporates a control wiring line configuration that extends from a control terminal portion to a first end portion along a driver's side portion, with additional terminal portions and signal wiring lines arranged to minimize wiring length and frame width, utilizing a flexible substrate with interconnected terminal and signal connection wiring lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If control wiring lines are routed across the driver or extended to end portions, then connection is achieved, but wiring line length increases and load increases
Solution Approach 1:
The patent transitions from two-dimensional planar routing to three-dimensional vertical routing by utilizing the thickness direction of the substrates. Wiring lines are routed through insulating films and across substrate thickness rather than only across the surface, significantly shortening the effective wiring length while maintaining connection reliability between the liquid crystal panel and driver.
Solution Approach 2:
The patent implements nested routing where control wiring lines are embedded within multiple layers of insulating films and substrate structures. The wiring lines are nested within the driver substrate and liquid crystal panel substrate layers, allowing compact routing through the vertical stack rather than requiring extended lateral paths.
2Reliability
If wiring lines are extended to end portions of the driver, then connection is achieved, but the frame width increases
Solution Approach 1:
The patent utilizes the vertical dimension (thickness direction) to route wiring lines through the driver and liquid crystal panel substrates rather than extending them along the lateral frame edges. This vertical routing approach allows connections to be made without increasing the lateral frame width, as the wiring paths are contained within the substrate thickness rather than extending beyond the display region boundaries.
3Adaptability or versatility
If input signal wiring lines are routed across the IC region, then lead-out electrode terminals can be disposed on both sides, but wiring line length increases and load increases
Solution Approach 1:
The patent routes input signal wiring lines vertically through the insulating films and substrate thickness rather than horizontally across the IC region surface. This vertical routing through the thickness direction allows lead-out electrode terminals to be disposed on both sides of the IC while significantly reducing the wiring line length compared to surface-level routing across the entire IC region.
Data Source
AI summary
A display device includes: a display panel including a display region and a non-display region; a driver; a control terminal portion connected to the driver; a first circuit portion interposed between the display region and the driver; and a control wiring line connected to each of the control terminal portion and the first circuit portion. A side portion closest to the display region of an outer peripheral portion of the driver is taken as a first side portion. The first circuit portion extends from a center side toward an end side in a first direction along the first side portion in the non-display region and includes a first end portion located at the center side in the first direction in the non-display region. The control wiring line is arranged extending from the control terminal portion to the first end portion across the first side portion.