JP4706534B2 - 照明装置 - Google Patents
照明装置 Download PDFInfo
- Publication number
- JP4706534B2 JP4706534B2 JP2006089569A JP2006089569A JP4706534B2 JP 4706534 B2 JP4706534 B2 JP 4706534B2 JP 2006089569 A JP2006089569 A JP 2006089569A JP 2006089569 A JP2006089569 A JP 2006089569A JP 4706534 B2 JP4706534 B2 JP 4706534B2
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- filter
- voltage
- crystal filter
- drive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Liquid Crystal (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Description
3 点灯部
4 フィルタ駆動部
22 透明電極
25 ネマチック液晶
52 制御部
La 放電灯
Claims (2)
- 光源を点灯させる点灯手段と、それぞれ扁平な形状であって厚さ方向に互いに重ねられて厚さ方向の一面が光源に向けられる2枚の液晶フィルタと、各液晶フィルタにそれぞれ交流の駆動電圧を供給するフィルタ駆動手段とを備え、
各液晶フィルタは、それぞれ、厚さ方向に対向した透明電極と透明電極間に配置された液晶とを有し、フィルタ駆動手段から入力されて透明電極間に加えられた駆動電圧で液晶が駆動されることにより、入力された駆動電圧に応じて透過する光の色を変化させるものであって、
フィルタ駆動手段は、2枚の液晶フィルタ間で駆動電圧の周波数を互いに一致させるとともに、一方の液晶フィルタに対する駆動電圧の位相を他方の液晶フィルタに対する駆動電圧の位相に対してπずらすものであり、
点灯手段は、交流の調光信号を入力され、調光信号の実効電圧に応じて光源の光出力を制御するものであって、
駆動電圧の周波数と調光信号の周波数とを互いに共通としたことを特徴とする照明装置。 - フィルタ駆動手段は駆動電圧の振幅を液晶フィルタ毎に個別に制御することを特徴とする請求項1記載の照明装置。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006089569A JP4706534B2 (ja) | 2006-03-28 | 2006-03-28 | 照明装置 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006089569A JP4706534B2 (ja) | 2006-03-28 | 2006-03-28 | 照明装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2007265807A JP2007265807A (ja) | 2007-10-11 |
JP4706534B2 true JP4706534B2 (ja) | 2011-06-22 |
Family
ID=38638594
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2006089569A Expired - Fee Related JP4706534B2 (ja) | 2006-03-28 | 2006-03-28 | 照明装置 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP4706534B2 (ja) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002107692A (ja) * | 2000-09-28 | 2002-04-10 | Fujitsu Ltd | 液晶表示装置のバックライト装置 |
JP2002372701A (ja) * | 2001-06-13 | 2002-12-26 | Ricoh Co Ltd | 画像表示装置 |
JP2004061828A (ja) * | 2002-07-29 | 2004-02-26 | Nippon Hoso Kyokai <Nhk> | 照明装置 |
-
2006
- 2006-03-28 JP JP2006089569A patent/JP4706534B2/ja not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002107692A (ja) * | 2000-09-28 | 2002-04-10 | Fujitsu Ltd | 液晶表示装置のバックライト装置 |
JP2002372701A (ja) * | 2001-06-13 | 2002-12-26 | Ricoh Co Ltd | 画像表示装置 |
JP2004061828A (ja) * | 2002-07-29 | 2004-02-26 | Nippon Hoso Kyokai <Nhk> | 照明装置 |
Also Published As
Publication number | Publication date |
---|---|
JP2007265807A (ja) | 2007-10-11 |
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