Novel Current Memory Circuit for AMOLED

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• Novel Current Memory Circuit for AMOLED

2
Outline

• Abstract
• Introduction
• Proposed Circuit Description
• Theorem
• Conventional vs. Proposed SI Memory
• Conclusion

3
Abstract

• Reduce the influence of charge-injection without
  using larger storage capacitor
• Realize the significant amount of speed up by
  means of small storage capacitor

4
Introduction

• How to protect the gate voltage ?
• The usage of complementary switch for the partial
  cancellation of charge injection
• The usage of large capacitance for the reduction
  of the voltage offset at critical node

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Proposed Circuit Description

• Analysis
• 0lttltt1Sampling
• T1lttltt2Reproduce

6
Theorem

• VSCANVdd
• The circuit is samples the current signals
• VSCAN0
• The circuit rep-roduces the sample current

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Conventional vs. Proposed SI Memory
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Conclusion

• Charge injection cannot directly affect the gate
  voltage by optimizing the size of TFT
• Improved the response time by reducing the
  storage capacitance