Optical Sensor Device Oblique Extrusion Mechanism for Slim Frame Measurement
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Solution Overview
Problem
Existing optical sensor devices for liquid crystal monitors face challenges in accurately measuring luminance and chromaticity due to size limitations and susceptibility to external light, especially when the frame is slimmed, and are prone to positional shifts caused by heat generation, leading to inaccurate readings and design constraints.
Innovation Solution
An optical sensor device with a guide member and drive means that extrudes and moves the sensor unit obliquely to approach the display screen for measurement, using a shading member to block external light and accommodate position shifts, allowing for accurate and reproducible measurements while maintaining a slim frame design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the optical sensor device uses a rotation mechanism with followers and drive transmission to move the sensor unit, then the sensor can be positioned for measurement, but the device size increases and design flexibility is limited
Solution Approach 1:
The patent extracts the complex rotation mechanism (followers and drive transmission) from the optical sensor device, replacing it with a simplified linear movement system. The sensor unit moves directly along a guide rail without requiring rotational components, significantly reducing device complexity while maintaining measurement capability.
Solution Approach 2:
Instead of rotating the sensor unit to achieve measurement positioning, the patent inverts the approach by using linear extrusion movement. The sensor unit is pushed out along a guide rail to reach the measurement position, then retracted using elastic restoring force, eliminating the need for complex rotational mechanisms.
2Adaptability or versatility
If the optical sensor device is made compact to fit slim frames, then designability improves, but the sensor unit becomes susceptible to external light interference
Solution Approach 1:
The patent introduces a shading member as an intermediary element between the external environment and the optical sensor. This shading member blocks external light from reaching the sensor, allowing the device to maintain a compact form factor while protecting against light interference. The shading member is positioned to cover the sensor opening when the sensor is in its measurement position.
Solution Approach 2:
The patent uses dynamic positioning of the shading member that moves with the sensor unit. When the sensor is extruded for measurement, the shading member automatically covers the sensor opening to block external light. When the sensor is retracted, the shading member moves with it, maintaining protection throughout the movement cycle.
3Device complexity
If the sensor unit is fixed without movement to downsize the device, then device complexity reduces, but positional shifts due to heat generation cause measurement inaccuracies
Solution Approach 1:
The patent employs dynamic adjustment mechanisms that allow the sensor unit to automatically compensate for thermal expansion and positional shifts. The guide rail system with elastic restoration enables the sensor to maintain proper positioning despite heat-induced dimensional changes in the frame structure.
Solution Approach 2:
The patent incorporates elements that can change their physical parameters in response to temperature variations. The elastic body's restoring force adjusts with temperature changes, and the guide rail positioning allows for thermal expansion compensation, maintaining measurement accuracy across different thermal conditions.
4Measurement precision
If the sensor unit moves obliquely to approach the display screen, then measurement accuracy improves, but the mechanism becomes more complex
Solution Approach 1:
The patent combines the guide rail structure with the drive mechanism into an integrated system. The guide rail not only provides movement guidance but also works with the elastic body to provide restoring force, merging multiple functions into a single structural element and reducing overall complexity.
Solution Approach 2:
The guide rail serves multiple functions: it guides the oblique movement of the sensor unit toward the display screen for accurate measurement positioning, provides structural support, and works with the elastic body to enable automatic retraction. This multi-functionality reduces the need for separate components.
Data Source
Figure 1(a)~2(c)
Figure 3(a)~4
Figure 5~7(c)
AI summary
There is provided an optical sensor device that, even when the frame is slimmed, can cause the sensor unit to leave or enter the frame smoothly, as well as can accommodate position shifts of the image display panel caused by activation and resulting heat generation thereof. An optical sensor device 1 includes a main body frame 2, a sensor unit 3 including an optical sensor 108, guide members 16 configured to guide the sensor unit 3, and drive means configured to move the sensor unit 3 to a measurement position. The sensor unit 3 is provided with, on both sides thereof, slide members 31. The sensor unit 3 moves obliquely forward along slopes 162 formed on front portions of the guide members 16, and a shading member 9 disposed on the sensor unit 3 contacts a display screen 101a of the image display panel. After making a measurement, the sensor unit 3 moves obliquely backward and is stored in the main body frame 2.