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Technology Now

Mitsubishi Electric Color TFT-LCD Modules Technologies and Product Trends

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3-3. Outdoor-use Technology: Glass Bonding

Outdoor-use Color TFT-LCD modules generally employ anti-scratch, waterproofed protective glass that is either bonded only to the edges of the display or added on later by the customer. The alteration usually leaves an air space that causes poor visibility due to light reflection and possible contamination by foreign particles.

We've developed a glass-bonded Color TFT-LCD module using resin to seamlessly bond the module with the protective glass (Fig. 7).

Fig. 7 Glass-bonded Color TFT-LCD module.

When an LCD module is fitted with customer-installed protective glass, it typically has an air gap between the protective glass and the LCD module. This causes light to reflect at three interfaces (between the air and front surface of the protective glass, between the back surface of the protective glass and the air, and between the air and front surface of the LCD module) and results in poor visibility, especially in outdoor environments. In a glass-bonded LCD module, the gap between the protective glass and the LCD module is filled with resin so that reflection at interfaces is minimized. The protective glass surface is treated with an AR coating to ensure optimal visibility.

Mitsubishi Electric's glass-bonded LCD modules are produced in-house to ensure superior quality throughout the entire manufacturing process, from design to production. We are a one-stop shop offering a range of services from technical support at the design stage to sales and quality assurance for the whole LCD module package.

3-4. Widescreen and Various Size Formats

We have developed four types of widescreen LCD modules. As shown in Fig. 8, these models are the same height as conventional LCD modules and can be easily replaced with current 4:3 aspect ratio displays. Widescreen LCD modules are suitable for displaying television and other digital content as well as for use with rack-mounted measuring instruments that have height restrictions.

We are also working to develop LCD modules in unique size, such as ultra-widescreen LCD modules (3:16 aspect ratio), to meet customer needs.

Fig. 8 Widescreen LCD modules accommodating 4:3 aspect ratio configurations.

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