scholarly journals Detection and Analysis of LED Display System in Large Stadiums

2018 ◽  
pp. 51-57
Author(s):  
Xiaodong YI ◽  
Min ZHOU
Keyword(s):  
Connected Domain ◽  
Experimental Results ◽  
National Standard ◽  
Flat Panel Display ◽  
Display System ◽  
Flat Panel ◽  
Light Point ◽  
Scanning Line ◽  
Led Display System ◽  
Adjustment Scheme

As the mainstream products of flat panel display, LED screen is becoming more and more popular, which has been widely used in the display system of large gymnasium. The detection of LED display system in large stadium is analyzed. Based on the large LED display in Jingzhou stadium, the qualification of LED display system after installation is tested. A scanning line seed filling algorithm is proposed and used to collect the gray value in the connected domain of the lamp and obtain the average gray value of the light point, so that the LED display system of the large gymnasium is detected. The experimental results show that a reasonable LED display and adjustment scheme can ensure the installation of LED display system in large gymnasium in line with the requirements of the national standard.

Performance of a flat-panel display system for proximal caries detection

2000 ◽  
Vol 16 (2) ◽  
pp. 67-72 ◽  
Author(s):  
Masaaki Hitomi ◽  
Masaomi Takizawa ◽  
Keiichi Uchida ◽  
Katashi Osanai ◽  
Takurou Wada ◽  
...  
Keyword(s):  
Caries Detection ◽  
Flat Panel Display ◽  
Display System ◽  
Flat Panel ◽  
Proximal Caries

71.3: Flat-Panel-Display System Based on Interference Modulation for Both Intensity and Color

2011 ◽  
Vol 42 (1) ◽  
pp. 1049-1051
Author(s):  
Yuye Ling ◽  
Weilu Gao ◽  
Shihong Ouyang ◽  
Guoen Liang ◽  
Yikai Su ◽  
...  
Keyword(s):  
Flat Panel Display ◽  
Display System ◽  
Flat Panel ◽  
Interference Modulation

64.3: Design of Partially Cascaded Clock-Embedded Serial Link Intra-Panel Interface for a Flat Panel Display System

2009 ◽  
Vol 40 (1) ◽  
pp. 967
Author(s):  
Ah-Reum Kim ◽  
Won-Jun Choe ◽  
Sang-Keun Lee ◽  
Nam-Deog Kim ◽  
Sang-Soo Kim
Keyword(s):  
Flat Panel Display ◽  
Display System ◽  
Flat Panel ◽  
Serial Link

Performance of a flat-panel display system convertible between 2D and autostereoscopic 3D modes

2001 ◽  
Author(s):  
David J. Montgomery ◽  
Graham J. Woodgate ◽  
Adrian M. S. Jacobs ◽  
Jonathan Harrold ◽  
David Ezra
Keyword(s):  
Flat Panel Display ◽  
Display System ◽  
Flat Panel

scholarly journals Optimal Color Lighting for Scanning Images of Flat Panel Display using Simplex Search

2018 ◽  
Vol 4 (11) ◽  
pp. 133
Author(s):  
HyungTae Kim ◽  
EungJoo Ha ◽  
KyungChan Jin ◽  
ByungWook Kim
Keyword(s):  
Image Quality ◽  
Light Source ◽  
Light Emitting Diode ◽  
Optical Filters ◽  
Flat Panel Display ◽  
Flat Panel ◽  
Light Emitting ◽  
Simplex Search ◽  
Inspection Systems ◽  
Color Control

A system for inspecting flat panel displays (FPDs) acquires scanning images using multiline charge-coupled device (CCD) cameras and industrial machine vision. Optical filters are currently installed in front of these inspection systems to obtain high-quality images. However, the combination of optical filters required is determined manually and by using empirical methods; this is referred to as passive color control. In this study, active color control is proposed for inspecting FPDs. This inspection scheme requires the scanning of images, which is achieved using a mixed color light source and a mixing algorithm. The light source utilizes high-power light emitting diodes (LEDs) of multiple colors and a communication port to dim their level. Mixed light illuminates an active-matrix organic light-emitting diode (AMOLED) panel after passing through a beam expander and after being shaped into a line beam. The image quality is then evaluated using the Tenenbaum gradient after intensity calibration of the scanning images. The dimming levels are determined using the simplex search method which maximizes the image quality. The color of the light was varied after every scan of an AMOLED panel, and the variation was iterated until the image quality approached a local maximization. The number of scans performed was less than 225, while the number of dimming level combinations was 20484. The proposed method can reduce manual tasks in setting-up inspection machines, and hence is useful for the inspection machines in FPD processes.

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