DISPLAY DEVICE, DISPLAY SYSTEM, MOBILE OBJECT, DISPLAY-BRIGHTNESS CONTROL METHOD, AND RECORDING MEDIUM STORING PROGRAM CODE

    公开(公告)号:US20190304402A1

    公开(公告)日:2019-10-03

    申请号:US16364561

    申请日:2019-03-26

    IPC分类号: G09G5/10 G02B27/01

    摘要: A display device, a display system, a mobile object, a display-brightness control method, and a recording medium storing program code. The display device and the display-brightness control method include obtaining brightness data indicating brightness in a peripheral area at prescribed time intervals, the peripheral area including at least some of a display area that serves as a background of display data, detecting a change in brightness in the peripheral area based on the brightness data obtained in the obtaining, determining display-brightness data that indicates display brightness when the change in brightness is detected, such that length of delay time before display brightness of the display data is made to correspond to the brightness of the peripheral area is equal to or shorter than a permissible delay time, and displaying the display data using the display-brightness data determined in the determining.

    LIGHT-SOURCE DEVICE AND IMAGE FORMING APPARATUS INCLUDING SAME

    公开(公告)号:US20210136336A1

    公开(公告)日:2021-05-06

    申请号:US17085193

    申请日:2020-10-30

    IPC分类号: H04N9/31 G03B21/20

    摘要: A light-source device includes an excitation light source, an optical member, and a wavelength converter. The excitation light source is configured to emit first color light. The optical member has a reflecting surface configured to reflect the first color light emitted from the excitation light source. The wavelength converter includes a wavelength conversion member on which the first color light reflected by the optical member is incident. The wavelength conversion member is configured to convert at least part of the first color light into second color light having a wavelength different from a wavelength of the first color light and emit the second color light. A center of the first color light on the reflecting surface of the optical member does not intersect with a light flux of the first color light emitted from the wavelength converter.

    ILLUMINATION DEVICE AND IMAGE PROJECTION APPARATUS

    公开(公告)号:US20180024425A1

    公开(公告)日:2018-01-25

    申请号:US15547901

    申请日:2016-02-09

    IPC分类号: G03B21/20 G03B21/16

    摘要: This invention is concerning an illumination device that can obtain illumination light efficiently. An illumination device 1 used in, for example, a projection display apparatus includes a light source and a light tunnel 14. The light tunnel 14 includes a light incident port 15, a light emission port 16, a light guide path 17, a reflection surface 20 surrounding the light guide path 17, a phosphor layer 19 that generates fluorescent light LF having a different wavelength range from that of excitation light LE when being excited by the excitation light LE, a condensing optical system 13 that diverges the excitation light LE in the vicinity of the light incident port 15 and guides the diverged light into the light tunnel 14 to irradiate the phosphor layer 19, and a wavelength selection element that reflects the fluorescent light LF toward the light emission port 16.