JP2011003380A5

JP2011003380A5 -

Info

Publication number: JP2011003380A5
Application number: JP2009145048A
Authority: JP
Filing date: 2009-06-18
Publication date: 2012-06-07

Description

上述した課題を解決し、目的を達成するために、本発明は、光を射出する発光部と、発光部の一方側に一体に設けられた第１封止部と、を備える発光管と、発光部の周囲のうちの一部を覆い発光部から射出した光を反射させる副反射面と、第１封止部を覆う延伸部と、を備える副反射鏡と、発光部から射出した光と、副反射鏡で反射した光とを反射させる主反射鏡と、延伸部と第１封止部との間に設けられた絶縁シートと、絶縁シートと延伸部との間に配置された第１電極と、絶縁シートに対して第１電極が配置された側の反対面側に配置された第２電極と、を有し、第１電極は、第２電極よりも発光部側にずらして配置され、第１電極と第２電極との間に電圧を印加することでイオン風を起こし、副反射面と発光部との間の空気を流動可能とする。
In order to solve the above-described problems and achieve the object, the present invention provides an arc tube comprising: a light emitting unit that emits light; and a first sealing unit that is integrally provided on one side of the light emitting unit; A sub-reflecting surface that includes a sub-reflecting surface that covers a part of the periphery of the light-emitting unit and reflects light emitted from the light-emitting unit; and a extending part that covers the first sealing unit; and light emitted from the light-emitting unit. The main reflecting mirror that reflects the light reflected by the sub-reflecting mirror, the insulating sheet provided between the extending portion and the first sealing portion, and the first disposed between the insulating sheet and the extending portion An electrode and a second electrode disposed on the opposite side of the insulating sheet to the side on which the first electrode is disposed, and the first electrode is disposed so as to be shifted to the light emitting unit side with respect to the second electrode. The ion wind is generated by applying a voltage between the first electrode and the second electrode, and the air between the sub-reflection surface and the light emitting part can flow. To.

図５は、本発明の実施例２に係るプロジェクター１の概略構成を示す図である。プロジェクター１は、不図示のスクリーンへ光を投写し、スクリーンで反射する光を観察することで画像を鑑賞するフロント投写型のプロジェクターである。プロジェクター１は、上記実施例１に係る光源装置２０２を有する（図１、図２も参照）。光源装置２０２は、赤色（Ｒ）光、緑色（Ｇ）光、青色（Ｂ）光を含む光を射出する。光源装置２０２には、電圧印加部３０が接続されている。電圧印加部３０は、電源（図示せず）から供給される交流電圧を、第１冷却用電極１８と第２冷却用電極１９との間に印加する。電圧印加部３０は、第１冷却用電極１８と第２冷却用電極１９との間で沿面放電の起こる電圧であって、スパークの起きない電圧を印加する。なお、第１冷却用電極１８は接地されている。 FIG. 5 is a diagram illustrating a schematic configuration of the projector 1 according to the second embodiment of the invention. The projector 1 is a front projection type projector that projects light onto a screen (not shown) and observes an image by observing light reflected on the screen. The projector 1 includes the light source device 202 according to the first embodiment (see also FIGS. 1 and 2). The light source device 202 emits light including red (R) light, green (G) light, and blue (B) light. A voltage application unit 30 is connected to the light source device 202. The voltage application unit 30 applies an AC voltage supplied from a power source (not shown) between the first cooling electrode 18 and the second cooling electrode 19. The voltage application unit 30 applies a voltage that causes creeping discharge between the first cooling electrode 18 and the second cooling electrode 19 and that does not cause a spark. The first cooling electrode 18 is grounded.

Claims

An arc tube comprising: a light emitting unit that emits light; and a first sealing unit that is integrally provided on one side of the light emitting unit;
A sub-reflecting mirror comprising: a sub-reflecting surface that covers a part of the periphery of the light emitting unit and reflects light emitted from the light emitting unit; and an extending unit that covers the first sealing unit;
A main reflecting mirror that reflects the light emitted from the light emitting unit and the light reflected by the sub-reflecting mirror;
An insulating sheet provided between the extending portion and the first sealing portion;
A first electrode disposed between the insulating sheet and the extending portion;
A second electrode disposed on the side opposite to the side on which the first electrode is disposed with respect to the insulating sheet,
The first electrode is arranged so as to be shifted to the light emitting unit side with respect to the second electrode,
A light source device characterized in that an ion wind is generated by applying a voltage between the first electrode and the second electrode, and the air between the sub-reflecting surface and the light emitting unit can flow.

2. The light source device according to claim 1, wherein the first electrode and the second electrode have flat ends at opposite ends.

3. The light source device according to claim 1, wherein the extending portion, the first electrode, and the second electrode are formed in a cylindrical shape that surrounds substantially the entire circumference of the first sealing portion.

A light source device according to any one of claims 1 to 3,
A voltage application unit for applying an alternating voltage between the first electrode and the second electrode;
And a spatial light modulator that modulates light emitted from the light source device in accordance with an image signal.

The projector according to claim 4, wherein the voltage application unit applies a voltage at which creeping discharge occurs between the first electrode and the second electrode.