Abstract
A color-separation system that angularly positions color LEDs to produce color separation and a lens array to focus this light onto the pixels is proposed. The LED rays from different incident angles are mapped into corresponding sub-pixel positions to efficiently display color image, which can be used to replace the absorbing color filter in the conventional liquid crystal layer. In this paper, the prototype backlight has been designed, fabricated and characterized. The measurement results of this module showed that a gain factor of transmission efficiency three times more than that of conventional color filters efficiency improvement and a larger color gamut are expected.
Highlights
In recent years, liquid crystal displays (LCDs) have been the most widely used apparatus in various applications as information display devices, such as computer, communication, and consumer electronics due to the thinner size and lighter weight.One problem facing current LCD is its low efficiency
The hybrid refractive-diffractive element [3], the holographic component [4], or the fractional Talbot plane of the grating [5] were designed for the color separation in the LCD projector or the color image detector
In this study, which is an advanced design for previous research [11,12], we propose another novel structure that consists of angularly positioned color LEDs and a lens array to produce color separation
Summary
Liquid crystal displays (LCDs) have been the most widely used apparatus in various applications as information display devices, such as computer, communication, and consumer electronics due to the thinner size and lighter weight. Dammann introduced a sandwich grating structure, which deflects three primaries (RGB colors) into different diffractive orders to spatially separate colors [2] Another well-known color-separation approach is combining a blazed grating with a micro lens array. The grating separates the incident light into angular distribution according to the wavelengths, and each micro lens focus these angular components into positional distribution at the focal plane. Based on this concept, the hybrid refractive-diffractive element [3], the holographic component [4], or the fractional Talbot plane of the grating [5] were designed for the color separation in the LCD projector or the color image detector. In this study, which is an advanced design for previous research [11,12], we propose another novel structure that consists of angularly positioned color LEDs and a lens array to produce color separation
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