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Omron delivers reversible light module for clamshell-type phones

Posted: 26 Oct 2004 ?? ?Print Version ?Bookmark and Share

Keywords:omron? light module?

Omron Corp. announced the development of what it claims as the world's first reversible light module for clamshell-type mobile phones.

Until today, Omron explained, two backlight modules and two liquid crystal displays were needed for the Clamshell-type phone display. But with this development both the main and sub-displays can be created with only one liquid crystal display and one reversible light module. According to the company, this will lead to technology improvements in handset design by not only reducing the number of parts needed but also reducing the cost, thickness and weight.

The reversible light module was developed as an application of "ultra-fine replication processing technology," which is one of Omron's core technologies. The main display uses the backlight, and the sub-display uses the front light so that both displays can be realized with one light module.

In order to integrate the backlight and front light functions in the reversible light, two new technologies were developed double prism technology and nano-prism technology.

The double prism technology realizes sheet-less composition of the lighting module by integrating the directivity transform function of external optical sheets unto the light guide itself, which is necessary for improving the brightness of the backlight.

The nano-prism technology improves the light guide's transparency, which is required by the front light technology. When viewing an image on the front light side, Omron said, there was a problem that the image would become whitish due to the reflection of light from the light guide surface.

With these technologies, the diffusion and prism sheets are no longer required for the backlight, and this allows the reduction of the films cost and the manufacturing steps of the display.





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