Transparent Terminal Pad for Display Information Code
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Solution Overview
Problem
The challenge is to easily read an information code on a display device after completion, particularly in a space-saving manner, due to the reduction in the substrate non-overlapping area caused by modified shape and reduced frame size, while avoiding light leakage issues associated with traditional configurations.
Innovation Solution
A display device configuration where the information code is disposed in the substrate non-overlapping area, overlapping with a light-transmitting terminal pad, allowing optical reading from either side, using a transparent substrate that does not require a backlight unit, and utilizing a conductive tape or paste for temporary removal to read the code.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the information code is disposed in the substrate non-overlapping area to save space, then the area utilization is improved, but the code cannot be read easily after device completion due to backlight unit obstruction and light leakage concerns
Solution Approach 1:
The patent utilizes the third dimension (depth/layers) by placing the information code on the array substrate and covering it with a light-transmitting terminal pad. This layered arrangement allows the code to be read optically through the transparent terminal pad from the front surface, bypassing the backlight unit obstruction issue and enabling readability without requiring backlight removal.
Solution Approach 2:
The patent employs optical properties and transparency characteristics of materials. The terminal pad is designed to be light-transmitting (transparent or translucent) to allow optical reading of the information code underneath, while the backlight unit's light can still pass through to illuminate the display. This optical property manipulation enables dual functionality of code readability and display operation.
2Ease of operation
If the terminal pad is made light-transmitting to enable code reading, then the readability is improved, but the electrical conductivity may be compromised
Solution Approach 1:
The terminal pad is constructed as a composite structure combining light-transmitting properties with electrical conductivity. This may involve using transparent conductive materials (such as ITO - indium tin oxide) or a composite of transparent material and conductive elements, allowing the terminal pad to simultaneously transmit light for code readability and conduct electricity for electrical connection functionality.
3Length of moving object
If the frame size is reduced to create special form factor, then the device compactness is improved, but the substrate non-overlapping area decreases making code placement difficult
Solution Approach 1:
The patent merges the function of the terminal pad with the information code carrier. By placing the code on the array substrate within or overlapping the terminal pad area, the code placement utilizes the same space required for electrical connection, effectively combining two functions into one area and eliminating the need for separate code placement space in the non-overlapping area.
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
Enables efficient management of traceability and information storage within the display device by allowing easy optical reading of the information code from both sides without compromising the device's functionality, addressing space constraints and light leakage concerns.
Implementation Method 1
the terminal pad and the information code are disposed in the substrate non-overlapping area on one plate surface of the second substrate, the plate surface facing the first substrate, such that the terminal pad and the information code overlap each other in a plan view and the light-transmitting portion covers an upper surface of the information code
Data Source
AI summary
A display device includes a display section including a first substrate and a second substrate, the display section displaying an image according to an electric signal, a terminal pad electrically connecting a conductor to a signal source or a ground node, and an information code expressing optically-readable information. The second substrate has a substrate overlapping area overlapping the first substrate in a plan view and a substrate non-overlapping area not overlapping the first substrate. At least a part of the terminal pad serves as a light-transmitting portion. The terminal pad and the information code are disposed in the substrate non-overlapping area on one plate surface of the second substrate such that they overlap each other in a plan view, with the light-transmitting portion covering the information code from above.