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http://dx.doi.org/10.7471/ikeee.2020.24.1.25

Image Generator Design for OLED Panel Test  

Yoon, Suk-Moon (Dept. Electronic Engineering, Hanbat National University)
Lee, Seung-Ho (Dept. Electronics&Control Engineering, Hanbat National University)
Publication Information
Journal of IKEEE / v.24, no.1, 2020 , pp. 25-32 More about this Journal
Abstract
In this paper, we propose an image generator for OLED panel test that can compensate for color coordinates and luminance by using panel defect inspection and optical measurement while displaying images on OLED panel. The proposed image generator consists of two processes: the image generation process and the process of compensating color coordinates and luminance using optical measurement. In the image generating process, the panel is set to receive the panel information to drive the panel, and the image is output by adjusting the output setting of the image generator according to the panel information. The output form of the image is configured by digital RGB method. The pattern generation algorithm inside the image generator outputs color and gray image data by transmitting color data to a 24-bit data line based on a synchronization signal according to the resolution of the panel. The process of compensating color coordinates and luminance using optical measurement outputs an image to an OLED panel in an image generator, and compensates for a portion where color coordinates and luminance data measured by an optical module differ from reference data. To evaluate the accuracy of the image generator for the OLED panel test proposed in this paper, Xilinx's Spartan 6 series XC6SLX25-FG484 FPGA was used and the design tool was ISE 14.5. The output of the image generation process was confirmed that the target setting value and the simulation result value for the digital RGB output using the oscilloscope matched. Compensating the color coordinates and luminance using optical measurements showed accuracy within the error rate suggested by the panel manufacturer.
Keywords
OLED Panel Test; Image Generator; RGB; Color Coordinates; Luminance; FPGA;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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