Display Panel Light Conversion for Touch Sensing and Color Purity
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Solution Overview
Problem
Existing display apparatuses face challenges in reducing thickness and weight due to the inclusion of touch panels and fingerprint recognition sensors, which occupy space and require additional wiring and processors, and also suffer from color mixing issues between adjacent subpixels.
Innovation Solution
Incorporating a panel array with a light conversion structure that converts visible light into near-infrared light, using a near-infrared light receiver to detect touches and eliminate the need for touch panels and fingerprint sensors, and employing a light converter to prevent color mixing by absorbing leaked light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate touch panel and fingerprint sensor are disposed on the display apparatus, then touch sensitivity and fingerprint recognition capabilities are achieved, but the thickness and weight of the display apparatus increase
Solution Approach 1:
The patent combines the touch panel, fingerprint sensor, and display panel into a single integrated structure. The touch-sensitive layer is formed directly on the display panel, and the fingerprint sensor is integrated within the same layer structure, eliminating the need for separate components and reducing overall weight.
Solution Approach 2:
The patent creates a multi-functional layer that simultaneously serves as the display panel, touch panel, and fingerprint sensor. This universal layer performs multiple functions: displaying images, detecting touch input, and recognizing fingerprints, thereby eliminating the need for separate dedicated components for each function.
2Adaptability or versatility
If a separate touch panel and fingerprint sensor are disposed on the display apparatus, then touch and fingerprint functions are provided, but additional wiring and processors are required increasing device complexity
Solution Approach 1:
The patent merges the control functions for touch and fingerprint recognition into a single integrated control structure within the display panel. The same layer and control circuitry handle both touch input detection and fingerprint pattern recognition, eliminating the need for separate wiring and processing units for each function.
Solution Approach 2:
The integrated layer serves as a universal interface that handles multiple input methods (touch and fingerprint) through a single control pathway. This multi-functional design allows the system to process both touch gestures and fingerprint data through the same wiring and processor architecture, reducing overall system complexity.
3Illumination intensity
If visible light is emitted by subpixels, then color display is achieved, but color mixing occurs between adjacent subpixels
Solution Approach 1:
The patent employs a light converter that changes the wavelength of light emitted by the subpixels. Instead of using visible light that can leak and cause color mixing, the system converts the light to near-infrared wavelengths, which have different optical properties and do not cause color mixing between adjacent subpixels.
Solution Approach 2:
The patent changes the fundamental parameter of light wavelength from visible range to near-infrared range. This parameter change fundamentally alters the light's interaction with the display medium, preventing color mixing while maintaining the ability to convey touch and fingerprint information through the display panel.
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 allows for a thinner and lighter display apparatus that maintains touch sensitivity and fingerprint recognition capabilities without additional components, reduces manufacturing costs, and prevents color mixing by using near-infrared light that is less scattered and reflected.
Implementation Method 1
a light converter which converts visible light into near-infrared
Implementation Method 2
a near-infrared light receiver which detects reflected light of the near-infrared
Data Source
AI summary
A display apparatus according to an embodiment of the present disclosure includes: a panel which includes a light emitting area and at least one non-light emitting area; a light emitting device which is disposed in the light emitting area and includes a first electrode, a light emitting stack, and a second electrode; a light converter which partitions an opening of the light emitting area and includes a light conversion material; and a capping layer disposed on the second electrode. The light converter includes a light conversion layer and a light amplifier.