Display Device Peripheral Circuit Stacking for Compact Touch Input
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Solution Overview
Problem
Existing display devices face challenges in achieving a compact design while maintaining high-definition display and efficient touch input functionality, often resulting in incongruities between display resolution and input resolution.
Innovation Solution
The display device incorporates a first substrate unit with a display unit, circuit unit, and drive element, along with a second substrate unit and a display function layer, where the circuit unit is disposed between the drive element and the first substrate, allowing for a compact design. This configuration includes multiple lines, switch elements, pixel electrodes, and a display function layer that performs optical operations based on electrical signals, and a drive element that outputs signals to the circuit unit, enabling both display and touch input operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the circuit unit is disposed between the drive element and the first substrate, then the device achieves a compact design with reduced peripheral region surface area, but the wiring complexity and signal transmission path increase
Solution Approach 1:
The patent applies dimensionality change by stacking the circuit unit between the drive element and the first substrate in the vertical direction (z-axis), rather than arranging components horizontally in the peripheral region. This three-dimensional arrangement reduces the surface area occupied by the peripheral region while maintaining all necessary electrical connections through vertical signal transmission paths.
2Measurement precision
If multiple lines and switch elements are used for touch input sensing, then the touch input resolution improves, but the incongruity between display resolution and input resolution persists
Solution Approach 1:
The patent implements multi-functionality by enabling the display device to operate in multiple modes: display operation mode where pixel electrodes control light transmission, and sense operation mode where the same pixel electrodes function as sensing electrodes for touch input. This allows the device to maintain high display resolution while achieving congruent high input resolution through the unified electrode structure.
3Adaptability or versatility
If the display device supports both high-definition display and efficient touch input, then the functionality improves, but the device size increases
Solution Approach 1:
The patent merges the display and touch sensing functions into a single integrated structure. The pixel electrodes serve dual purposes as both display elements and touch sensing elements, eliminating the need for separate component arrays. The circuit unit is also integrated between the drive element and substrate, combining multiple functional units in a compact arrangement that supports both high-definition display and efficient touch input without increasing overall device size.
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 allows for a compact display device that supports high-definition display and efficient touch input operations, reducing the surface area of the peripheral region and enhancing operational efficiency.
Implementation Method 1
The display function layer performs an optical operation based on an electrical signal applied to the plurality of pixel electrodes
Data Source
AI summary
According to one embodiment, a display device includes first and second substrate units, a display function layer, and a drive element. The first substrate unit includes a first substrate, a display unit, and a circuit unit. The first substrate has a first surface including a display region and a peripheral region. The display unit is provided in the display region, and includes first lines, second lines, switch elements, pixel electrodes, and third lines. The circuit unit is provided in the peripheral region, and is electrically connected to one of the second lines and one of the third lines. The second substrate unit includes a second substrate and fourth lines. The display function layer is provided between the first and second substrate units. The drive element is provided on the peripheral region. At least a portion of the circuit unit is disposed between the drive element and the first substrate.