• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2012.10a
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• pp.689-691
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• 2012

In this study, a MDDI protocol packet generation method that is implemented in software is proposed. MDDI protocol is used widely for display device. In this study, MDDI protocol packets are generated by software within micro processor. This method needs minimum hardware configuration. For implementation of this method, we design a hardware platform with a high performance microprocessor and a FPGA. The packets generated by software within microprocessor is converted into LVDS signals, and transmitted by hardware within FPGA.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.17 no.5
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• pp.1089-1094
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• 2013

In this study, we propose how th implement a MDDI(Mobile Display Digital Interface) protocol packet generation method in software. MDDI protocol is widely used in mobile display device. MDDI protocol packets are generated by software within micro processor. This method needs the minimum hardware configuration. In order to implementation of this method, we design a hardware platform with a high performance microprocessor and a FPGA. The packets generated by software within microprocessor are converted into LVDS signals, and transmitted by hardware within FPGA. This study suggests the benefits of the way how software can easily create a variety of packet. But, this proposed method takes more time in packet transmission compared to the traditional method. This weakness remains as a future challenge, which can be soon improved.

• Proceedings of the KIEE Conference
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• 2005.05a
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• pp.212-214
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• 2005

The MDDI(Mobile Digital Display Interface) standard is an optimized high-speed serial interconnection technology developed by Qualcomm and supports the VESA(Video Electronics Standard Association). It increases reliability and reduces power consumption in clamshell phones by decreasing the number of wires to interconnect with the LCD display. In this paper, the MDDI host is designed using VHDL and implemented on FPGA. We demonstrates that the MDDI host is connected with S3CA460 LCD controller is designed by Samsung Electronics Co. and display a steal image to the LCD.

• Journal of IKEEE
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• v.13 no.4
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• pp.50-56
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• 2009

This paper describes the design of image data transmitter for portable media device for Mobile Display Digital Interface standard. The transmitter uses connection lines to 6 to transmit QVGA image data. In this paper, the transmitter is using only 9 packets for image processing and a state-machine based design is adapted for packet processing. The design was verified using FPGA Xilinx virtex4-LX60. Data rate of the transmitter is 363Mbps with six connection lines. The transferring capability is 30 frame of 24bit RGB 500,000 pixel image data per second.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.13 no.7
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• pp.1379-1385
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• 2009

We propose a low-power and high-speed client receiver for a mobile display digital interface (MDDI) newly in this paper. The low-power receiver is designed such that bias currents, sink and source currents, are insensitive to variations of power supply, process, temperature, and common-mode input voltage (VCM) and is able to operate at a rate of 450Mbps or above under the conditions of a power supply range of 3.0 to 3.6Vand a temperature range of -40 to 85$^{\circ}$C. And it is confirmed by a simulation result that the current dissipation is less than 500${\mu}$A. A test chip is manufactured with the Magna chip 0.35${\mu}$m CMOS process. When a test was done, the data receiver and data recovery circuits are functioning normally.

• Journal of Institute of Control, Robotics and Systems
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• v.14 no.6
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• pp.523-529
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• 2008

In this paper, we proposed mobile LCD module test device on embedded based, when operating the existing LCD, divide flicker clearly in full frame, and configuration so as to support between other CPU interface, MDDI, SPI, 24Bit RGB interface, etc. that is based on a high-speed CPU. In addition, when demand to test about each pixel of LCD, it is possible to change IP design of H/W, FPGA, but proposed system is application possible without other design changing. Proposed system is made smaller and equipped with battery, so secure with mobility for effective test the LCD/OLED module and it is able to test the pattern by the client program, for example exiting picture, mpeg, simple pattern test and test per pixel, scale, rotation, Odd/Even pixel per video, etc. From now on, if integrating with independent test system and it is configured that is able to mutual communication and test, it is expected to reduce consumption of human resources and improve productivity for LCD module test.