Display Input Sensor Layout for Pen and Photo Sensor Sensitivity
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Solution Overview
Problem
Existing display devices lack effective input methods for precise touch inputs, particularly for users familiar with writing instruments, and there is a need to improve the sensitivity of photo sensors in electronic devices.
Innovation Solution
A display device with a sensing region comprising a first and second region, featuring a specific arrangement of conductive layers and line components, and a photo sensor below the display device to enhance input sensitivity and support magnetic field-based inputs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a photo sensor is placed below the display device to enable touch input sensing, then touch-based input capability is provided, but the sensitivity of the photo sensor is insufficient for precise input detection
Solution Approach 1:
The patent transitions from a single-layer conductive structure to a multi-layer conductive structure with first and second conductive layers arranged in different dimensions. This dimensional expansion allows the photo sensor to detect inputs more effectively by creating multiple sensing planes that enhance the overall sensitivity and detection capability for precise touch and pen inputs.
Solution Approach 2:
The sensing region is divided into multiple distinct regions (first region, second region, and peripheral region) with different line component configurations. This segmentation allows each region to be optimized for specific input types, with the second region having wider line components for enhanced pen input detection and the first region maintaining standard configurations for general touch sensing.
2Measurement precision
If the line width of conductive components is increased to improve photo sensor sensitivity, then input sensitivity is enhanced, but the manufacturing precision and pattern alignment become more difficult
Solution Approach 1:
The patent applies different line width characteristics to different regions of the conductive layers. The second region contains line components with widths specifically optimized for photo sensor sensitivity, while other regions maintain standard line widths. This local differentiation allows sensitivity enhancement in critical areas without compromising overall manufacturing feasibility or pattern alignment across the entire display.
3Measurement precision
If a multi-layer conductive structure is implemented to enhance sensing capability, then input detection accuracy is improved, but the device complexity increases
Solution Approach 1:
The multi-layer conductive structure serves multiple functions simultaneously: it provides touch sensing capability, pen input detection, and photo sensor sensitivity enhancement. By integrating these functions into a unified structure where the first and second conductive layers work together, the patent avoids the need for separate sensing systems, thereby managing complexity while achieving improved input detection accuracy.
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
The solution enables precise touch inputs using a pen and improves the sensitivity of photo sensors, allowing for intuitive and accurate input methods, including touch and magnetic field-based interactions.
Implementation Method 1
the first electrode is configured to induced a magnetic field in response to a current flowing therethrough
Data Source
AI summary
An electronic device includes a display panel and an input sensor. The input sensor includes a plurality of first line components and a plurality of second line components. The first line components include (1-1)-th line components in a first region of the input sensor and (1-2)-th line components in a second region of the input sensor, and the second line components include (2-1)-th line components in the first region and (2-2)-th line components in the second region. The (2-1)-th line component has a smaller line width than the (2-2)-th line component.