We introduce a hybrid backlight module, which consists of a hybrid light guide plate (HLGP) and a brightness enhancement film (BEF). The HLGP comprises functions of a conventional light guide plate, a reflector, and a BEF. The HLGP allows one-dimensional rays to be collimated. We add a BEF above the HLGP, and let the crossed-dimension rays to be collimated. Comparing with the conventional edge-...

The use of holographic structures is promising for the realization of efficient systems in backlight applications for displays. By applying surface relief gratings on top of a side-lit lightguide we realize a backlight that avoids the use of color filters. The grating is used as a light outcoupling and color-separating element. The demands for this grating are stringent and calculations have be...

Ruibo Lu (SID Member) Xiangyi Nie Shin-Tson Wu (SID Fellow) Abstract — The color performance, including color gamut, color shift, and gamma curve, of a multidomain vertical-alignment (MVA) liquid-crystal display (LCD) using an LED backlight are calculated quantitatively. Simulation results indicate that an LED backlight exhibits better angular color uniformity and smaller color shifts than a CC...

In order to reasonably reduce the energy consumption of automotive LCD instrument and improve display quality, a new local dimming algorithm is proposed in this paper. Firstly, gray image input obtained by using maximum principle, then, LED backlight brightness value Otsu method entropy method. The BMA smoothing improved combining bilinear interpolation algorithm, pixel compensation based on lo...

Although commercially response time is still being used, but in the research community it now recognized that the motion blur needs to be estimated in order to give a fair characterization of a display’s motion rendering capabilities. However, the dynamic backlight which has been added to improve contrast and black level of the LCD display could have an influence on the temporal properties of t...

Dynamic Luminance Scaling (DLS) reduces the backlight power consumption of color TFT LCD while maintaining the image brightness or contrast. This paper presents extended DLS (EDLS) as a framework for the backlight power management of the transflective LCD panels. The EDLS framework switches between DLS and Dynamic Contrast Enhancement (DCE) depending on the panel mode, which may be transmissive...

We optimized the emission spectrum of a quantum dot (QD) backlight and achieved ~140% color gamut in CIE 1976 color space. The QD-based LCD not only exhibits a wide color gamut but also improves the optical efficiency. Our systematic photometric analysis provides useful guidelines to further optimize the QD backlight design.

image processing, negatives One source of high quality digital image data is scanned photographic negatives, which can be processed to produce high quality color images. The scanned data must be inverted and processed to adjust for the film and scene characteristics. This report details a proposed approach to processing scanned negatives to produce output color images suitable for viewing on a ...

In this study, a filter-design scheme based on Independent Component Analysis (ICA) is proposed for defect inspection in backlight panels. In a backlight panel image, the gray levels of defects and the background are very similar and result in a low-contrast image which makes the defect detection task difficult. The proposed method is based on an ICA filtering scheme that computes the output re...