Vehicle Display Proximity Sensor Segmentation
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Solution Overview
Problem
Current display apparatuses for vehicles face challenges in providing efficient 3D interaction and proximity touch recognition, often resulting in reduced user convenience due to limitations in resolution and viewing angles, as well as high power consumption.
Innovation Solution
A display apparatus for vehicles that incorporates optical sensor units and a touch sensor unit, capable of detecting user hand and finger movements by calculating X-axis, Y-axis, and Z-axis information based on light reflection and capacitance changes, allowing for dynamic adjustment of sensor cell sizes to optimize interaction and reduce power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single proximity sensor is used, then the device complexity is reduced, but the measurement precision and coverage area are insufficient
Solution Approach 1:
The patent divides the detection space into multiple zones (first proximity zone, second proximity zone, and contact zone) and uses different sensor types for each zone. The first proximity sensor detects objects in the first proximity zone, while the second proximity sensor detects objects in the second proximity zone, allowing each sensor to be optimized for its specific detection range and purpose.
Solution Approach 2:
The patent transitions from two-dimensional proximity detection to three-dimensional spatial detection by adding a second proximity sensor with a different detection range and positioning it at a different location. This enables detection in multiple spatial dimensions and creates overlapping detection zones for more precise object localization.
2Measurement precision
If multiple sensor types are used, then the measurement precision and detection coverage are improved, but the use of energy increases
Solution Approach 1:
The patent dynamically adjusts the operation of the second proximity sensor based on detection results from the first proximity sensor. When an object is detected in the first proximity zone, the system activates the second proximity sensor to perform additional detection in the second proximity zone. This dynamic activation strategy reduces overall power consumption while maintaining high detection precision when needed.
Solution Approach 2:
The system employs periodic detection cycles where the first proximity sensor continuously monitors for objects, and the second proximity sensor is activated periodically when conditions warrant additional detection. This periodic operation of the second sensor reduces average power consumption while ensuring accurate detection when objects are present.
3Length of stationary object
If the detection distance is increased, then the area of detection is expanded, but the measurement precision is reduced
Solution Approach 1:
The patent segments the detection distance into multiple ranges with different precision requirements. The first proximity sensor handles longer detection distances with moderate precision, while the second proximity sensor handles shorter distances with high precision. This segmentation allows each sensor to operate in its optimal range, maintaining overall system precision across all detection distances.
Solution Approach 2:
Different detection zones are assigned different quality requirements. The first proximity zone requires detection at longer distances with acceptable precision, while the second proximity zone requires detection at shorter distances with high precision. By applying local quality optimization to each zone, the system achieves accurate position detection throughout the entire detection range.
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
Enhances user convenience by enabling accurate 3D interaction and proximity touch recognition without dead zones, while reducing power consumption through adaptive sensor cell sizing and efficient operation of the touch sensor unit.
Implementation Method 1
calculating X-axis, Y-axis, and Z-axis information based on light reflection
Implementation Method 2
calculating X-axis, Y-axis, and Z-axis information based on capacitance changes
Data Source
Figure 1
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Figure 2b
AI summary
A vehicle includes a display apparatus. The display apparatus includes a display unit, an optical sensor unit, a touch sensor unit, and a processor. The processor can determine whether a hand is located within a first distance range away from the display unit and whether the hand is located within a second distance range away from the display unit that is closer to the display unit than the first distance range. The optical sensor unit is configured to recognize the received light based on the hand being located within the first distance range, and the touch sensor unit is configured to recognize the hand based on the hand being located within the second distance range. The processor can cause the touch sensor unit to operate based on a determination that the hand has transitioned from being located within the first distance range to being located within the second distance range.