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公开(公告)号：US09389430B2
公开(公告)日：2016-07-12
申请号：US14517049
申请日：2014-10-17
Inventor： Kouki Ichihashi , Masahiro Kasano , Yasuhiro Tanaka , Katsuhiko Hayashi
CPC classification number: G02B27/2264 , G02B3/005 , G02B27/0093 , G02B27/2214 , G02B27/26 , G02F1/133526 , G02F1/29 , G02F2001/133565 , G02F2001/291
Abstract: A light deflection element is capable of deflecting incident light so as to follow a position of an observer and suppressing reduction in intensity of light that reaches eyes of the observer regardless of their position. The light deflection element includes: a first optical element configured to deflect incident light; a second optical element configured to change a deflection direction of emitted light by changing a refractive index thereof according to a voltage applied thereto; a third optical element; and a control section configured to control the voltage applied to the second optical element. At least one of interfaces between the first and second optical elements and the second and third optical elements is an aspheric surface. The aspheric surface has an optical power that compensates enlargement of the emitted light which is caused by refractive index distribution caused when a voltage is applied to the second optical element.
Abstract translation: 光偏转元件能够使入射光偏转以跟随观察者的位置，并且抑制到达观察者眼睛的光的强度降低，而不管其位置如何。 光偏转元件包括：第一光学元件，被配置为偏置入射光; 第二光学元件，被配置为通过根据施加到其上的电压改变其折射率来改变发射光的偏转方向; 第三光学元件; 以及控制部，被配置为控制施加到第二光学元件的电压。 第一和第二光学元件与第二和第三光学元件之间的至少一个界面是非球面。 非球面具有光学功率，其补偿当对第二光学元件施加电压时引起的由折射率分布引起的发射光的放大。
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公开(公告)号：US10146052B2
公开(公告)日：2018-12-04
申请号：US15214841
申请日：2016-07-20
Inventor： Masahiro Kasano , Kouki Ichihashi , Yosuke Asai , Katsuhiko Hayashi
Abstract: The present disclosure provides a virtual image display apparatus, head-up display system, and vehicle that distribute a spatially divided parallax image between a left eye and right eye of a user appropriately. The virtual image display apparatus according to the present disclosure includes a display device configured to spatially divide with a first pitch and to output right-eye images and left-eye images, first optical members periodically disposed with a second pitch, distributing light based on the output from the display device between a right-eye direction and a left-eye direction, and a second optical member configured to reflect or refract, by positive power, the light distributed between the right-eye direction and the left-eye direction by the first optical members. The first pitch is narrower than the second pitch.
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公开(公告)号：US10281722B2
公开(公告)日：2019-05-07
申请号：US15728543
申请日：2017-10-10
Inventor： Satoshi Kuzuhara , Masafumi Sueyoshi , Hiroaki Okayama , Katsuhiko Hayashi
Abstract: A head-up display projects an image on a windshield to allow a viewer to visually observe a virtual image. The head-up display includes a display device, a relay optical system, and a projection optical system. The display device displays an image. The relay optical system provides the image displayed by the display device as an intermediate image. The projection optical system reflects the intermediate image provided by the relay optical system to project the intermediate image on the windshield.
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公开(公告)号：US09651792B2
公开(公告)日：2017-05-16
申请号：US14816423
申请日：2015-08-03
Inventor： Katsuhiko Hayashi , Shuji Inoue
IPC: G02F1/1335 , G02B27/22 , G09F9/00 , G02F1/1347
CPC classification number: G02B27/2214 , G02B27/22 , G02F1/1347 , G09F9/00
Abstract: The present disclosure provides an image display apparatus having excellent light converging characteristics. The image display apparatus includes: a liquid crystal prism element including a prism array in which a plurality of prisms are arranged, a liquid crystal layer laminated on the prism array, and electrodes provided at position corresponding to the respective prisms which form the prism array; a control section configured to control a voltage to be applied to each electrode; and a position detection section configured to detect a viewing position of a user. The control section is able to apply the same or different voltages to the respective electrodes provided at the positions corresponding to the respective prisms, on the basis of a result of the detection of the viewing position by the position detection section.
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