TrioLCD™: Sunlight Readable LCD Display with Transflective Appearance

A regular transmissive LCD has poor readability in outdoor environments. The common approach solving this problem has been active enhancement, in which many extra CCFL backlight bulbs are added to the LCD module. This approach provides a certain level of sunlight readability with some drawbacks associated, such as extra power consumption, excessive heat generation, and bulky housing. With our extensive knowledge of optical technology, RayShine Photonics Corp. (RSP) devoted its efforts to the development of a compensatory sunlight readable solution that would enhance a LCD's sunlight readability without the negative byproducts. Years of R&D resulted in the convenient, affordable, and efficient solution for outdoor LCD applications - the TrioLCD.

RSP's TrioLCD technology is a patented LCD passive enhancement technology developed based on our expertise in the field of optical science - specifically, our understanding of the optical properties of a transmissive LCD. The characteristics of a TrioLCD are summarized in its name - Transmissive and Reflective Illuminations Optimized LCD, which also implies a passive optimization. The enhancement equips a LCD with ample reflectivity without compromising its original transmissive functions. With the imposed reflective function, the modified LCD can reflect the ambient light passing the LCD cell and use the reflected light beams as its source of illumination. Hence the stronger the ambient light, the greater the reflective luminance of the LCD and the brighter the LCD would appear (Fig. 1). In fact, a TrioLCD is visible under strong ambient light even without its CCFL backlight turned on, as shown in Fig. 2.

Figure 1

Figure 2

Though having "transflective" appearance, a TrioLCD is free of the common shortcomings of a traditional transflective LCD, such as discoloration and low brightness indoors. With the optimized reflective and transmissive illuminations, TrioLCD comes with improved optical characteristics in luminance, contrast ratio, viewing angle, and color saturation (Figs. 3 & 4), and it is suitable for both indoor and outdoor applications.

Figure 3

Figure 4

The superb optical qualities of a TrioLCD in an outdoor environment is achieved with no mechanical alteration, and does not result in extra power consumption or excessive heat generation as active enhancement would produce. Its unique transflectivity under direct sunlight has put it in high demand with many customers, especially those who demand low heat generation and power consumption.

TrioLCD is a truly convenient and affordable solution to the ever-increasing demand for sunlight-readable outdoor applications. Please contact us for further information!