An 8b Source Driver for 2.0 inch Full-Color Active-Matrix OLEDs Made with LTPS TFTs

Park, Yong-Sung; Kim, Do-Youb; Kim, Keum-Nam; Matsueda, Yojiro; Choi, Jonghyun; Kang, Chul-Kyu; Kim, Hye‐Dong; Chung, Ho Kyoon; Kwon, Oh‐Kyong

doi:10.1109/isscc.2007.373622

Cited by 10 publications

(2 citation statements)

References 3 publications

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“…By utilizing the multiple R-string technique, DAC circuits having the advantages of higher-resolution and smaller area had been proposed. [12][13][14] However, by utilizing the multiple R-string technique, it is very difficult to implement the totally non-linear relationship between each gray level required for gamma-correction compensation. The first Rstring divides the voltage levels non-linearly, while the second R-string divides two adjacent nodes of the first R-string again linearly.…”

Section: Digital-to-analog Convertermentioning

confidence: 99%

Digital‐to‐analog converter with gamma correction on glass substrate for TFT‐panel applications

Wang¹,

Li²,

Ker³

2009

J Soc Info Display

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Abstract— Low‐temperature polysilicon (LTPS) technology has a tendency towards integrating all circuits on glass substrate. However, the poly‐Si TFTs suffered poor uniformity with large variations in the device characteristics due to a narrow laser process window for producing large‐grained poly‐Si TFTs. The device variation is a serious problem for circuit realization on the LCD panel, so how to design reliable on‐panel circuits is a challenge for system‐on‐panel (SOP) applications. In this work, a 6‐bit R‐string digital‐to‐analog converter (DAC) with gamma correction on glass substrate for TFT‐panel applications is proposed. The proposed circuit, which is composed of a folded R‐string circuit, a segmented digital decoder, and reordering of the decoding circuit, has been designed and fabricated in a 3‐μm LTPS technology. The area of the new proposed DAC circuit is effectively reduced to about one‐sixth compared to that of the conventional circuit for the same LTPS process.

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Section: Digital-to-analog Convertermentioning

confidence: 99%

Digital‐to‐analog converter with gamma correction on glass substrate for TFT‐panel applications

Wang¹,

Li²,

Ker³

2009

J Soc Info Display

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“…To gain the advantages of SOP applications, some researchers had reported the integration of all control and driving circuits into the display panel. [4][5][6] An 8-bit CPU containing 13,000 TFTs on glass substrate was reported to demonstrate the feasibility of SOP. 7 In Ref.…”

Section: Introductionmentioning

confidence: 99%

Implementation of delta—sigma analog‐to‐digital converter in LTPS process

2010

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Abstract— An on‐panel delta—sigma analog‐to‐digital converter (ADC) has been implemented and verified for 3‐μm low‐temperature polysilicon (LTPS) technology with two basic blocks: a delta—sigma modulator and a decimation filter. From the experimental results, the digital output from the delta—sigma modulator is correctly matched with the analog input voltage ratio such that the digital output can be converted into 8‐bit digital code successfully under a supply voltage of 10 V from the decimation filter. The implemented on‐panel delta—sigma ADC can be used for the application of temperature‐to‐digital converter on glass substrate.

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