22.3: High‐Definition Projection Screen: Enhancing Technique of Contrast and Fineness

Abstract

A novel high‐definition rear projection screen (Blue Ocean™ screen, Nitto Jushi Kogyo, Co., Ltd.) has been developed. Uniformity of brightness and color can be achieved with no lens elements by controlling the multiple light scattering. The enhancing technique of contrast and fineness in ambient light has been demonstrated in this paper.

55.1: Invited Paper: A Novel LCD Structure Using Transparent Polymers Free of Birefringence and Scattering Polymers Free of Wavelength Dependency

“…HSOT polymer screens for projection displays have been introduced and commercialized [4]. Though a conventional rear projection screen is composed of a Fresnel lens, a lenticular lens and a diffuser, the HSOT polymer screen is composed of only one HSOT polymer plate.…”

60.3: Spatio-Temporal Edge Enhancement for Reducing Motion Blur

“…DCC [3] is a function of the gray signal of the current frame and that of the previous frame (Eq. 1).…”

“…(1) increasing the physical switching speed with faster liquid crystal (LC) and optimizing the structure of the LC cell and the electrodes, (2) employing compensating driving methods for the dynamic LC capacitance [3,4,5,6], (3) reducing the temporal aperture by either inserting blanks [7,8] or by increasing the frame rate [9], and (4) video image processing [10,11,12].…”

“…In this report, we propose a new image processing algorithm, called DCC-ST, to reduce motion blur. DCC-ST is a variation of DCC (Dynamic Capacitance Compensation) [3]. In DCC, the degree of overdriving [13] only depends on the gray levels of the current and the previous frame.…”

51.1: Overdrive Method for Reducing Response Times of Liquid Crystal Displays

“…One of the simplest modifications is so called "overdrive," where a pixel is biased to a voltage exceeding the target voltage for the first frame and for subsequent frames it is biased to the target voltage. This approach has recently become of importance [3,4,5,6], because it needs no modifications on the device design, and it can be used in combination with other aforementioned approaches, regardless to device modes. Despite its potential promise, there have been no systematic explorations of the overdrive methods and its effect on director switching.…”