Treatment Sensing Device With Dual-Mode Diode Control
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Solution Overview
Problem
Existing integrated devices with light-emitting and photosensitive components face issues of resolution and uniformity due to the arrangement of multiple components, which are affected by spacing and size constraints, leading to inefficiencies in light intensity and sensing capabilities.
Innovation Solution
A treatment sensing device is designed with a substrate and transistors configured to switch between light-emitting and sensing modes, allowing diodes to function as both light-emitting diodes and photodiodes, optimizing spacing and signal-to-noise ratio through transistor control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple components (LED and PD) are arranged in an array, then light-emitting and sensing functions are achieved, but component spacing increases and resolution deteriorates
Solution Approach 1:
The patent applies multi-functionality by enabling the diode to operate in dual modes: light-emitting mode (forward bias) and sensing mode (reverse bias). This eliminates the need for separate LED and PD components, allowing a single component to perform both functions. The diode is controlled by transistors that switch between these modes, achieving versatility without increasing component count or spacing.
2Measurement precision
If photodiode is placed between two light-emitting diodes, then sensing capability is improved, but distance between light-emitting diodes increases and uniformity deteriorates
Solution Approach 1:
The same diode that serves as a light-emitting component can also function as a sensing component when switched to reverse bias mode. This eliminates the need to place additional photodiodes between light-emitting diodes, maintaining uniform spacing and light intensity distribution while preserving sensing capability through the same component.
3Length of stationary object
If small-sized components are selected to reduce spacing, then component spacing is reduced, but component size and process limits are reached
Solution Approach 1:
The patent merges the light-emitting diode and photodiode functions into a single diode component. This consolidation eliminates the need for multiple separate components, allowing standard-sized components to be used without reducing spacing. The merging approach avoids the manufacturing constraints associated with miniaturizing multiple components while achieving the same functional integration.
4Adaptability or versatility
If two different sizes of components are packaged, then light-emitting and sensing functions are achieved, but packaging complexity increases
Solution Approach 1:
By using a single diode component that can operate in both light-emitting and sensing modes, the patent eliminates the need to package two different sized components (LED and PD). The universal diode component has uniform dimensions, simplifying the packaging process and reducing structural complexity while maintaining dual functionality through electrical mode switching.
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 device maintains light intensity and uniformity while enhancing sensing capabilities, enabling flexible applications such as phototherapy and physiological signal measurement without enlarging distances between components.
Implementation Method 1
when the diode is in a light-emitting mode, the second end of the first transistor provides a positive voltage to the diode
Implementation Method 2
when the diode is in a sensing mode, the second end of the second transistor provides a ground voltage or a negative voltage to the diode
Data Source
AI summary
A treatment sensing device includes a substrate, a diode, a first transistor and a second transistor. The diode is disposed on the substrate and includes a first end. The first transistor is disposed on the substrate and includes a first end and a second end, wherein the first end of the first transistor is electrically connected to the first end of the diode. The second transistor is disposed on the substrate and includes a first end and a second end, wherein the first end of the second transistor is electrically connected to the first end of the diode. When the diode is in a light-emitting mode, the second end of the first transistor provides a positive voltage to the diode. When the diode is in the sensing mode, the second end of the second transistor provides a ground voltage or a negative voltage to the diode.