US 11,953,781 B2
Display apparatus that time-divisionally illuminates different pixel regions with diffracted color light beams
Yoshiaki Kouyama, Kanagawa (JP)
Assigned to Sony Semiconductor Solutions Corporation, Kanagawa (JP)
Appl. No. 17/420,480
Filed by SONY SEMICONDUCTOR SOLUTIONS CORPORATION, Kanagawa (JP)
PCT Filed Dec. 11, 2019, PCT No. PCT/JP2019/048416
§ 371(c)(1), (2) Date Jul. 2, 2021,
PCT Pub. No. WO2020/153026, PCT Pub. Date Jul. 30, 2020.
Claims priority of application No. 2019-010059 (JP), filed on Jan. 24, 2019.
Prior Publication US 2022/0082887 A1, Mar. 17, 2022
Int. Cl. G02F 1/13357 (2006.01); G02F 1/1335 (2006.01); G09G 3/02 (2006.01); G09G 3/34 (2006.01); G09G 3/36 (2006.01)
CPC G02F 1/133606 (2013.01) [G02F 1/133622 (2021.01); G09G 3/02 (2013.01); G09G 3/3413 (2013.01); G09G 3/36 (2013.01); G09G 2320/0242 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A display apparatus, comprising:
a light source unit that emits a plurality of color light beams having wavelengths different from one another;
a light intensity modulation element including a plurality of pixels, and subjecting the plurality of color light beams to intensity modulation to generate an image;
a diffraction element configured to simultaneously illuminate at least two pixel regions at pixel positions different from each other, with color light beams different from each other, by diffracting respective color light beams from the light source unit toward a plurality of pixel regions at pixel positions different from one another on the light intensity modulation element; and
a control unit that changes diffraction angles of the respective color light beams in the diffraction element within a predetermined period, and sequentially switches illumination regions for the plurality of pixel regions by the respective color light beams, to allow all of the plurality of color light beams to time-divisionally illuminate any pixel region of the plurality of pixel regions within the predetermined period,
wherein the diffraction element comprises a diffraction optical element including a plurality of diffraction regions of the diffraction angles which are different, for each of the plurality of color light beams and
wherein the plurality of diffraction regions are arranged in a rectangular configuration with two rows of the plurality of diffraction regions in series with each other and the diffraction element has a configuration in which a rectangular operation enables sequentially switching among the plurality of diffraction regions according to a rectangular operation direction.