US 11,871,159 B2
Display unit for reducing degradation of optical components
Kazumasa Kaneda, Tokyo (JP)
Assigned to SONY CORPORATION, Tokyo (JP)
Appl. No. 17/287,647
Filed by SONY CORPORATION, Tokyo (JP)
PCT Filed Oct. 17, 2019, PCT No. PCT/JP2019/040883
§ 371(c)(1), (2) Date Apr. 22, 2021,
PCT Pub. No. WO2020/090498, PCT Pub. Date May 7, 2020.
Claims priority of application No. 2018-207748 (JP), filed on Nov. 2, 2018.
Prior Publication US 2021/0360210 A1, Nov. 18, 2021
Int. Cl. H04N 9/31 (2006.01); G02B 27/09 (2006.01); G02F 1/1335 (2006.01)
CPC H04N 9/3152 (2013.01) [G02B 27/0961 (2013.01); G02F 1/133526 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A display unit, comprising:
a light source section configured to output light;
a light uniformization section including at least one uniformization optical member, wherein the light uniformization section has a light entrance surface through which the light outputted from the light source section enters and a light output surface through which light is outputted;
a condenser lens for the light outputted from the light uniformization section to enter; and
a reflective light valve to be illuminated by light outputted from the condenser lens, wherein
one of an optical axis of the condenser lens or an inclination angle of the reflective light valve is set such that a light condensing position on a light output surface side of the light uniformization section for return light is different from a light condensing position on the light output surface side of the light uniformization section for the light outputted from the light source section, and
the return light is the light that is reflected by the reflective light valve and returns to the light output surface of the light uniformization section via the condenser lens.