Invention Grant
- Patent Title: Sound collection device
-
Application No.: US17160849Application Date: 2021-01-28
-
Publication No.: US11713874B2Publication Date: 2023-08-01
- Inventor: Hitoshi Nakatsukasa
- Applicant: YAMAHA CORPORATION
- Applicant Address: JP Hamamatsu
- Assignee: YAMAHA CORPORATION
- Current Assignee: YAMAHA CORPORATION
- Current Assignee Address: JP Hamamatsu
- Agency: Rossi, Kimms & McDowell LLP
- Priority: JP 18055557 2018.03.23
- The original application number of the division: US16358893 2019.03.20
- Main IPC: G08B5/00
- IPC: G08B5/00 ; F21V33/00 ; G10L25/51 ; H04R1/02 ; F21V8/00

Abstract:
A light emission display device according to an aspect of the present invention includes: a light guide member that converts rays of incident light from a back face thereof to produce diffused light and emits the diffused light from the front face; a plurality of point light sources that are arranged at intervals on a side of the back face of the light guide member, in which the light guide member includes a light shield structure that partitions the front face into a plurality of light emission regions each corresponding to at least one point light source of the plurality of point light sources immediately below the front face, such that transmission of the rays of light to an adjacent light emission region is reduced.
Public/Granted literature
- US20210148561A1 LIGHT EMISSION DISPLAY DEVICE, LIGHT EMISSION DISPLAY SWITCH, AND SOUND COLLECTION DEVICE Public/Granted day:2021-05-20
Information query