Faceplate bonding process for a visual display unit
US5795430A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 2, 1996 |
| Grant date | Aug 18, 1998 |
| Priority date | — |
| Expiry date | Dec 2, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1744
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method of bonding faceplates (20) to VDU screens is provided in which an adhesive material is dispensed (80) onto a surface of either the faceplate or the VDU (40), the faceplate and the VDU are brought together (90) to force the adhesive material outwards to fill the gap between the surfaces, and the adhesive material layer (41) which is formed is then cured. In a first curing step (100), curing is carried out around the edges of the faceplate to form a seal around the edges. This first step may be carried out in a dedicated positioning tool. A later curing step (120) ensures that all of the adhesive material layer is eventually cured. Positioning (90) in the dedicated tool may use specific reference points on the faceplate and the VDU rather than relying on physical spacers, and may be carried out under servo control of a system for detecting the onset of undesirable gas entrapment conditions within the adhesive layer. The invention is particularly useful for automated or semi-automated bonding of touch-plates to screens to form touch-input displays, with the avoidance of spacers and with the selective, two-stage curing enabling minimising of time in the positioning tool.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.