Display Substrate Holes for SMT Mounting and Current Routing
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Solution Overview
Problem
The existing display apparatuses face challenges in minimizing interference between holes used for fixing substrates to SMT devices and electrically conductive lines, which can disrupt the flow of driving current to light sources, affecting the performance and efficiency of local dimming technology.
Innovation Solution
The display apparatus incorporates a substrate design with holes that connect the first and second surfaces, allowing for the placement of electrically conductive lines between dimming blocks without interference, ensuring efficient current supply and signal transmission to light sources arranged in series, thereby enhancing the contrast ratio and overall display performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If holes are formed on the substrate for fixing to SMT device, then the substrate can be securely mounted, but the holes may interfere with forming electrically conductive lines for supplying driving current to light sources
Solution Approach 1:
The patent utilizes the vertical dimension by forming holes that extend from the first surface to the second surface of the substrate. These holes are strategically positioned in regions surrounded by light sources of each dimming block, allowing the substrate to be fixed to the SMT device while maintaining clear paths for electrically conductive lines on the substrate surface without interference between the two functions.
2Adaptability or versatility
If electrically conductive lines are formed to supply driving current to light sources, then local dimming function is enabled, but holes for substrate fixation may disrupt the current flow
Solution Approach 1:
The patent applies local quality by dividing the substrate into multiple dimming blocks, where each dimming block contains at least four light sources arranged in rows and columns. Electrically conductive lines are formed within each dimming block to connect light sources in series, while holes are positioned in regions surrounded by light sources of each respective dimming block. This localized organization ensures that conductive lines for current flow and holes for fixation do not interfere with each other, maintaining both local dimming functionality and current flow reliability.
3Reliability
If holes are used to electrically connect first and second surfaces of substrate, then electrical connectivity is achieved, but the holes may conflict with the placement of conductive lines for light source connections
Solution Approach 1:
The patent segments the substrate into multiple dimming blocks, with each dimming block containing at least four light sources connected in series. Holes are positioned in regions surrounded by light sources of each dimming block, creating distinct zones for electrical connectivity and light source placement. This segmentation allows independent optimization of conductive line layouts within each dimming block without conflicting with hole positions, reducing overall device complexity while maintaining electrical connectivity between surfaces.
Data Source
AI summary
A display apparatus includes: a liquid crystal panel; a plurality of light sources configured to emit light; and a substrate including a plurality of dimming blocks arranged in rows and columns, wherein each of the plurality of dimming blocks includes at least four light sources from among the plurality of light sources, and the least four light sources are connected in series with each other and arranged in rows and columns on a first surface of the substrate, the substrate includes a plurality of holes extending from the first surface of the substrate to a second surface of the substrate, the first surface of the substrate and the second surface of the substrate are electrically connected through the plurality of holes, and each of the plurality of holes is in a region surrounded by the at least four light sources of each respective dimming block of the plurality of dimming blocks.