19.4: Reflective Backlights for Liquid Crystal Displays

Abstract

A novel reflective backlight based on OLED technology has been developed for use with monochrome transmissive LCDs. The rear metal cathode of the OLED in combination with a polarisation preserving diffuser is used as the reflector for the LCD, thereby avoiding the use of an inefficient transflector. Both green and blue reflective backlights are reported which provide greater luminous efficacies and brighter reflective states than conventional transflective LCDs illuminated with either LED or inorganic electroluminescent backlights.

Emiflective Display with Integration of Reflective Liquid Crystal Display and Organic Light Emitting Diode

“…The combination of an OLED and a R-LCD was first proposed by Lueder in 2000. 2) Afterwards, the hybrid device structures, [3][4][5][6] the pixel and the driving circuit design, 7) and the optical performance 8) were reported.…”

Emi-Flective Display Device with Attribute of High Glare-Free-Ambient-Contrast-Ratio

“…Compared with other reported hybrid devices, [2][3][4][5][6][7][8] the proposed configuration of S2 in this paper combined the merits of OLED and R-LCD more successfully. Through integrating the OLED with R-LCD, the GFA-CR of both OLED and R-LCD modes were significantly enhanced.…”

“…A trans-flective display has been adopted for mobile applications for its merits of power-saving and legibility whether in sunlight ambience or darkness. 1) However, to further reduce the form factor, a structure which replaced the backlight module with an organic light emitting diode (OLED) was proposed [2][3][4][5][6][7] and was called an emi-flective display. 8) A hybrid device integrating OLED and liquid crystal display (LCD) without intermediate glass lid was carried out.…”

Volumetric Scattering Layer for Flexible Transflective Display

“…To realize these requirements, an integrated device which combined an organic light emitting diode (OLED) and a reflective liquid crystal device (RLCD) was proposed. [1][2][3][4][5][6][7][8] The design concept was originated from utilizing RLCDs for preventing OLEDs from the wash-out and further for saving the power by using ambient light as the light source. 9) In this letter, we demonstrate a flexible transflective liquid crystal display (FTF-LCD) which can realize all of the above-mentioned features for mobile display.…”