发明名称 |
Scanning display device and speckle reduction method |
摘要 |
A scanning display device includes: a light source section including at least one light source configured to emitting coherent light; a light scanning section including: a scan mirror configured to reflect the light originated from the light source section and scan over a screen; and a turning section configured to turn the scan mirror; a depolarizer having outgoing polarized light distribution in which a state of polarization of outgoing light consecutively changes within an element plane, wherein: the depolarizer is placed in an optical path along which the light emitted by the light source section reaches the screen; and the state of polarization of the light is changed, thereby scanning the screen with light that has a polarized light distribution, in which the state of polarization consecutively changes, in a beam diameter. |
申请公布号 |
US9244289(B2) |
申请公布日期 |
2016.01.26 |
申请号 |
US201313799469 |
申请日期 |
2013.03.13 |
申请人 |
ASAHI GLASS COMPANY, LIMITED |
发明人 |
Koyanagi Atsushi |
分类号 |
G02B26/08;G02B27/48;G02B26/10;G02B27/28 |
主分类号 |
G02B26/08 |
代理机构 |
Oblon, McClelland, Maier & Neustadt, L.L.P |
代理人 |
Oblon, McClelland, Maier & Neustadt, L.L.P |
主权项 |
1. A scanning display device, comprising:
a light source section including at least one light source configured to emit coherent light; a light scanning section including:
a scan mirror configured to reflect the light originated from the light source section and scan over a screen; anda turning section configured to turn the scan mirror; a depolarizer having outgoing polarized light distribution in which a state of polarization of outgoing light consecutively changes within an element plane, wherein: the depolarizer is placed in an optical path along which the light emitted by the light source section reaches the screen; and the state of polarization of the light is changed, thereby scanning the screen with light that has a polarized light distribution, in which the state of polarization consecutively changes, in a beam diameter. |
地址 |
Chiyoda-ku JP |