Display Device Protruding Substrate Pad Unit Positioning
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Solution Overview
Problem
Existing OLED displays face challenges in minimizing overall size due to the separation requirements between the touch sensor pad unit and the polarizing plate, which increases the device's thickness and weight.
Innovation Solution
The design incorporates a second substrate with a protruding portion that covers part of the first substrate, allowing the touch sensor and polarizing plate to be positioned without overlapping the pad unit, thereby reducing the overall size of the display device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the pad unit is separated from the touch sensor to keep the polarizing plate from overlapping the pad unit, then the polarizing plate can be properly positioned, but the overall size of the display device increases
Solution Approach 1:
The second substrate is extended in the second direction (crossing the first direction) to create a protruding portion. This dimensional extension allows the touch sensor and polarizing plate to be positioned on the extended area, eliminating the need for separation in the first direction and thereby reducing the overall device size while maintaining proper component positioning
Solution Approach 2:
The second substrate is divided into a main body portion and a protruding portion. The protruding portion specifically accommodates the touch sensor and polarizing plate, separating these components from the main display area. This segmentation allows optimized positioning without increasing the overall device footprint
2Reliability
If the pad unit is separated from the touch sensor, then the polarizing plate can be positioned without overlapping, but the distance between components increases leading to increased thickness and weight
Solution Approach 1:
By extending the second substrate in the second direction (crossing the first direction), the invention relocates the touch sensor and pad unit to the protruding portion. This spatial reconfiguration in a different dimension allows components to be positioned closer together, reducing the distance between them and thereby decreasing device thickness and weight while preventing overlap
3Reliability
If the pad unit is separated from the touch sensor by a predetermined distance, then the polarizing plate can be properly positioned, but manufacturing efficiency decreases and costs increase
Solution Approach 1:
The protruding portion of the second substrate integrates the touch sensor, pad unit, and polarizing plate into a single extended structure. This merging of components into one integrated unit simplifies the manufacturing process, improves production efficiency, and reduces costs while maintaining proper positioning relationships
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 configuration minimizes the overall size of the display device, enhances manufacturing efficiency, and reduces manufacturing costs while improving the device's strength and reliability by exposing the pad unit and substrate area through an opening, thus preventing breakage from external impacts.
Implementation Method 1
a display unit located at the first substrate for displaying an image
Implementation Method 2
The display unit may include an organic light emitting diode
Data Source
AI summary
A display device includes a first substrate, a display unit located at the first substrate for displaying an image, a first pad unit coupled with the display unit and located at an end side of the first substrate in a first direction, and a second substrate on the first substrate and having an opening exposing the first pad unit, the second substrate including a protruding portion covering a portion of the first substrate and neighboring the opening in a second direction crossing the first direction, wherein the display unit is between the second substrate and the first substrate.