Picture quality improvement and power saving of eco-friendly LCDs by use of adaptive dimming technique

• Project/Area Number: 19760232
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Electron device/Electronic equipment
• Research Institution: The University of Electro-Communications
• Principal Investigator: SHIGA Tomokazu The University of Electro-Communications, 電気通信学部, 准教授 (10313412)
• Project Period (FY): 2007 – 2008
• Project Status: Completed (Fiscal Year 2008)
• Budget Amount: ¥3,540,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥240,000); Fiscal Year 2008: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2007: ¥2,500,000 (Direct Cost: ¥2,500,000)
• Keywords: 表示 / 液晶ディスプレイ / 省エネルギー / 消費電力

Research Abstract

環境に優しいLED バックライトを用いた液晶テレビに対し、画像適応調光方式を適用すべく調光パラメータの最適化を図った。一般的なテレビ映像に対しては、調光段階数を5、領域を16×12 分割、発光分布の広がりを領域分割幅程度とすれば、従来方式の約半分の電力にできる可能性があることがわかった。また提案方式を応用したカラーブレイクアップの低減方法や、低輝度階調特性の向上など高画質化技術を提案し、その効果を確かめた。

Research Products

• [Journal Article] Power savings and enhancement of gray-scale capability of LCD TVs with an adaptive dimming techniques (2007)
  • Author(s): T. Shiga, S. Shimizukawa, S. Mikoshiba
  • Journal Title: J. SID vol 16 Pages: 311-316
  • Peer Reviewed
• [Journal Article] Power savings and enhancement of gray-scale capability of LCD TVs with an adaptive dimming techniques (2007)
  • Author(s): T. Shiga, S. Shimizukawa, S. Mikoshiba
  • Journal Title: Journal of Society for Information Display 16 Pages: 311-316
  • Peer Reviewed
• [Presentation] Adaptive Dimming 方式による液晶テレビの低電力・高画質化 (2009)
  • Author(s): 志賀智一
  • Organizer: 電子情報通信学会2008 年度総合大会
  • Place of Presentation: 愛媛
  • Year and Date: 2009-03-18
• [Presentation] Adaptive Dimming方式による液晶テレビの低電力・高画質化 (2009)
  • Author(s): 志賀智一
  • Organizer: 電子情報通信学会2008年度総合大会
  • Place of Presentation: 高松、日本
  • Year and Date: 2009-03-18
• [Presentation] Power Reduction of LCTVs with an Adaptive Dimming Technique for Standard TV Programs (2008)
  • Author(s): T. Shiga
  • Organizer: 15th International Display Workshops
  • Place of Presentation: Niigata, Japan
  • Year and Date: 2008-12-04
• [Presentation] Power Reduction of LCTVs with an Adaptive Dimming Technique for Standard TV Programs (2008)
  • Author(s): Tomokazu Shiga
  • Organizer: 15^<th> International Display Workshop
  • Place of Presentation: Niigata, Japan
  • Year and Date: 2008-12-04
• [Presentation] アダプティブディミング方式を用いたLCD の階調特性改善 (2008)
  • Author(s): 榊原和真、下田怜、志賀智一
  • Organizer: 電子情報通信学会ディスプレイ研究会
  • Place of Presentation: 東京
  • Year and Date: 2008-10-05
• [Presentation] Overlapped RGB Emissions for Reducing Color Breakup and Motion Blur of Field Sequential Color LCDs (2007)
  • Author(s): S. Shimizukawa, T. Shiga, S. Mikoshiba
  • Organizer: 14th International Display Workshops
  • Place of Presentation: Sapporo, Japan
  • Year and Date: 2007-12-08
• [Patent(Industrial Property Rights)] 画像表示の信号処理方法及び画像表示 (2007)
  • Inventor(s): 志賀、清水川、御子柴
  • Industrial Property Rights Holder: 電気通信大学
  • Industrial Property Number: 2007-311200
  • Filing Date: 2007-11-30
• [Patent(Industrial Property Rights)] 画像表示の信号処理方法及び画像表示装置 (2007)
  • Inventor(s): 志賀, 清水川, 御子柴
  • Industrial Property Rights Holder: 電気通信大学
  • Industrial Property Number: 2007-311200
  • Filing Date: 2007-11-30