Offset LED Chip Arrangement for Display Device Contact Reduction
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Solution Overview
Problem
The challenge is to create a cost-effective and efficient component for display devices, such as video walls, that allows for simple manufacturing and reduces the number of LED chips and contacts required to represent a predetermined number of pixels, while maintaining high multiplexing rates and efficient use of LED chips.
Innovation Solution
A surface-mounted device (SMD) on a printed circuit board with LED chips arranged in rows and columns, where one red, one green, and one blue LED chip are alternately arranged per row and column, with rows offset to create a parallelogram shape, allowing for efficient use of LED chips to represent multiple pixels with fewer contacts and larger solder pads, thereby reducing manufacturing costs and increasing stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional LED chip arrangements are used, then each pixel requires multiple LED chips and contacts, but this increases the number of contacts and manufacturing complexity
Solution Approach 1:
Each LED chip is designed to serve multiple pixel positions through offset row arrangements. A single LED chip can represent pixels in its own row as well as pixels in adjacent rows, making the LED chip a multi-functional element that reduces the total number of contacts required
Solution Approach 2:
The patent combines multiple pixel representations into a single LED chip by implementing offset row arrangements where LED chips in one row are positioned to serve both their own row and adjacent rows, merging the function of multiple chips into one
2Manufacturing precision
If more LED chips are used to represent pixels, then pixel representation is more accurate, but this increases manufacturing costs
Solution Approach 1:
LED chips are designed to serve multiple pixel positions simultaneously through offset arrangements, reducing the total number of chips needed while maintaining accurate pixel representation through clever positioning and control
3Productivity
If conventional row arrangements are used, then manufacturing is straightforward, but LED chip utilization efficiency is low
Solution Approach 1:
The patent introduces asymmetric offset arrangements where rows are shifted by different amounts (first offset for odd rows, second offset for even rows), creating a staggered pattern that improves LED chip utilization while maintaining manageable complexity through systematic variation
Solution Approach 2:
The invention adds a dimensional aspect to row arrangements by introducing offset positions in the horizontal direction, transforming conventional single-dimensional row layouts into two-dimensional staggered arrangements that improve chip utilization
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This arrangement enables a more efficient use of LED chips, reduces the number of contacts needed, and allows for simpler and cost-effective printed circuit boards, while maintaining high multiplexing rates and efficient LED chip utilization, especially in display devices with small pixel pitches.
Implementation Method 1
LED chips arranged in rows. The LED chips (LED, 'light-emitting diode') are configured to emit light in the intended operation
Data Source
AI summary
A component for a display device, a display device and a method for operating the display device, a computer program and a storage medium are disclosed. The component comprises LED chips arranged in rows, wherein one red, one green and one blue LED chip are arranged alternately per row in the extension direction of the respective row and per column obliquely to the extension direction, and the rows have an offset from one another in the extension direction.