Touch Panel Inspection Pseudo Finger Pneumatic Force Control
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Solution Overview
Problem
Existing touch panel inspection devices are inefficient in changing pressing forces and cannot accurately inspect touch panels with light or zero pressing force, limiting their ability to detect defective panels and ensuring product quality.
Innovation Solution
A touch panel inspecting apparatus with a pseudo finger mechanism that includes a holding part, contact position changing part, set pressing force memory, pressing force regulating part, and acquiring part, allowing flexible adjustment of pressing force using compressed gas passages to form a hydrostatic gas bearing, enabling contact with zero or minimal pressing force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If weights are replaced to change pressing force in existing inspection devices, then pressing force can be adjusted, but inspection efficiency is considerably degraded
Solution Approach 1:
The patent uses a pneumatic pressing force regulating mechanism with compressed gas passages to apply controlled pressure to the pseudo finger. This allows pressing force to be adjusted by changing gas pressure rather than physically replacing weights, enabling quick and flexible force adjustment without degrading inspection efficiency
Solution Approach 2:
The patent changes the physical state parameter (gas pressure) to control pressing force. By varying the pressure of compressed gas supplied to the pseudo finger, the system can continuously adjust pressing force from zero to various levels, replacing the discrete weight-based adjustment with continuous parameter control
2Force
If self weights of pen member, weight, and arm member are acted on contact, then pressing force can be applied, but weakening pressing force has a ceiling and cannot inspect touch panel touched with considerably light force such as approximately zero gram
Solution Approach 1:
The patent introduces compressed gas pressure as a counteracting force to offset the self-weight of the pseudo finger and its supporting structure. By adjusting the gas pressure, the system can cancel out the gravitational force and achieve zero or near-zero pressing force, enabling inspection of touch panels with extremely light touch forces
Solution Approach 2:
The system uses pneumatic pressure regulation to control the pressing force of the pseudo finger. Compressed gas passages supply controlled pressure to counterbalance and adjust the effective pressing force, allowing the system to achieve pressing forces from zero gram upward, far below what mechanical weight systems can provide
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 apparatus efficiently inspects touch panels by easily changing pressing forces, improving inspection efficiency and enabling the detection of defective panels under a wide range of conditions, including zero mechanical load, thereby enhancing product quality assurance.
Implementation Method 1
pressing force regulating part and an acquiring part; allowing flexible adjustment of pressing force using compressed gas passages to form a hydrostatic gas bearing
Data Source
AI summary
An inspection apparatus is provided with a holder configured to set an inspection target thereon, the inspection target configured to detect a contact position on the inspection target touched by a human finger; pseudo finger(s) configured to be detected as the human finger upon contact with the inspection target; a positioner configured to move the pseudo finger(s) relative to the inspection target and to change the contact position of the pseudo finger(s) relative to the inspection target; a memory configured to store, respectively, a value of a pressing force in a range of pressing forces said range including a zero pressing force for each of the pseudo finger(s) on the inspection target; a controller configured to regulate the pressing force for pseudo finger(s) of the pseudo finger(s) based on the respective value; and a sensor configured to acquire an electric signal output from the inspection target.