Omron Corporation, a global leader in automation, sensing and control, today announced it has developed the world's first double-sided light guide for fold-out dual-screen handsets. The product was presented at FPD International 2004 at the Pacific Fair in Yokohama, Japan, at the end of October, attracting a lot of attention in the industry. In the past, folding dual-screen mobile phones use a set of backlights and LCD panels respectively as one of the core technologies in mobile phones on the main screen and the secondary screen. The double-sided light guide plate newly developed by OMRON enables a double-sided light guide plate And a LCD panel at the same time, respectively, for the main screen and vice screen. Omron released its headlamp technology in October 2003, and now it has successfully added backlighting capabilities. Double-sided light guide plate ultra-fine replication technology to make the use of folding dual-screen mobile phone screen display using the backlight, vice screen is the use of headlamps, only a group of optical components to achieve a dual-screen display. The introduction of the product, not only reduces the number of components required in mobile phones, but also reduces cost, thickness and weight, mobile phone designers have more space to play, so that the flexibility of mobile phone design has been greatly improved. In recent years, the function of the mobile phone has been expanded from the original voice service to the data communication with text and images. The folding mobile phone has become one of the global user's tendencies. More and more sophisticated mobile phone display, the screen is bigger and bigger, higher and higher definition, but also the demand for lightweight mobile phones are also continuing to increase. According to statistics, the demand for folding mobile phones in 2003 accounted for 25% of the global total demand. In Japan, a country with a high utilization rate of data communications, about 70% of mobile phones are folded phones. However, there is still plenty of room for growth in China's mobile phone market. The demand for mobile phone screen displays, data communications and camera functions is rapidly increasing. The demand for folding mobile phones is expected to grow even faster. In the coming years, Omron will further strengthen its market expansion in Asia, especially in China, in order to push its double-sided light guide plate to the global handset market.

About double-sided light guide plate new technology: Indicator parameters compared with the display of other manufacturers shows the thickness of one-half of the sample thickness (depending on the phone will be different): 4 mm down to 2 mm backlight need not be reused Diffuser and prism plate. AR headlamps are no longer needed. One-half of the cost of the display has been specially treated to reduce the reflection of external light.

Technical Features: In order to integrate the performance of the backlight and headlamp into the double-sided light guide plate, Omron uses two technologies, namely, the double prism and Nanoprism technology. Biprism Technology: This technology integrates the direction conversion function of the external film into the light guide plate, which is very important for improving the brightness of the backlight. In the past, backlights used multilayer films to increase the brightness of emitted light. However, although the film improves the brightness of the backlight, it also reduces the quality of the headlamp. Therefore, the requirements of the light guide plate, that is, do not use the film can control the brightness of the backlight. To achieve this goal, OMRON has added a series of secondary prisms to the existing prism devices that concentrate the emitted light without a thin film. This development increased the brightness of the emitted light by 130%. Nano Prism Technology: This technology improves the transparency of the light guide plate, which is required by headlamp technology. When looking at the image displayed by the headlamp, the image turns white due to the reflection of the light on the surface of the light guide plate. In the development of the light technology last year, Omron succeeded in reducing the light reflected by the light guide plate by using 200 nm intervals. The double-sided light guide is the interval is reduced by 50% to 100nm, the reflected light is further reduced. This makes the secondary screen higher contrast, the image clearer (increased by 1.5 times). With these technologies, the diffuser and prism plates are no longer needed for the backlight and the film costs are reduced and the manufacturing steps for the display are simplified. In addition, increased headlamp transparency reduces the ambiguity in the secondary screen image display, replacing it with high contrast.