Synchronized Radiation Source Array for Low-Power Object Sensing
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Solution Overview
Problem
Object-sensing display devices typically require higher power consumption due to the continuous operation of radiation sources for object detection, which is both impractical and environmentally undesirable.
Innovation Solution
The method involves synchronizing first and second signals to selectively activate radiation sources in groups, reducing power consumption by only turning on radiation sources near activated scan lines, rather than maintaining all sources continuously active.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If radiation sources are activated continuously for object detection, then object detection accuracy is maintained, but power consumption increases
Solution Approach 1:
The radiation source array is divided into multiple groups that can be activated independently. The controller selectively activates only the group corresponding to the currently active scan line, segmenting the continuous operation into discrete, targeted activations. This maintains detection accuracy for the active region while reducing overall power consumption by leaving other groups inactive.
Solution Approach 2:
The system uses periodic scanning of scan lines through the sensing circuit array.配合 with the grouped radiation source activation, this creates a periodic action pattern where radiation sources are activated in cycles corresponding to the scan line activation sequence. This allows the system to maintain detection capability during active scanning periods while minimizing power consumption during inactive periods.
2Area of stationary object
If all radiation sources are activated simultaneously, then coverage is maximized, but power consumption increases
Solution Approach 1:
The radiation source array is segmented into multiple groups, and the controller activates only the specific group corresponding to the currently scanned scan line. This segmentation allows the system to maintain full detection coverage capability when needed while significantly reducing power consumption by activating only a subset of radiation sources at any given time.
Solution Approach 2:
The system dynamically adjusts which radiation source groups are active based on the current scan line position. As scan lines are activated sequentially through the sensing circuit array, the controller dynamically switches between different radiation source groups, optimizing the balance between detection coverage and power consumption at each moment in time.
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 approach significantly reduces power consumption while maintaining high accuracy in object detection, as radiation sources are only activated when needed, minimizing unnecessary power usage.
Implementation Method 1
a sensing transistor that outputs a detection signal when an object is detected and the scan line is receiving a first signal
Implementation Method 2
a radiation source array that emits radiation to the sensing circuit
Data Source
AI summary
A display device capable of accurately sensing object presence at lower power consumption is presented, as well as a method of driving the display device. The display device includes a sensing circuit that detects the presence of an object by sensing radiation, and a radiation source array that provides radiation to the sensing circuit. First signals are provided to the scan lines of the sensing circuit, sequentially activating the sensors during a frame period. Second signals are provided to a radiation source array to selectively activate different portions of the radiation source array. The first and second signals are synchronized in their timing such that the portion of the radiation source array that supplies radiation to the activated sensors are turned on.