Invention Grant
- Patent Title: Electronic color-chart device
- Patent Title (中): 电子彩图设备
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Application No.: US14428133Application Date: 2013-09-10
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Publication No.: US09368692B2Publication Date: 2016-06-14
- Inventor: Kazunari Tomizawa , Yoshifumi Shimodaira
- Applicant: Sharp Kabushiki Kaisha
- Applicant Address: JP Osaka JP Shizuoka
- Assignee: SHARP KABUSHIKI KAISHA,NATIONAL UNIVERSITY CORPORATION SHIZUOKA UNIVERSITY
- Current Assignee: SHARP KABUSHIKI KAISHA,NATIONAL UNIVERSITY CORPORATION SHIZUOKA UNIVERSITY
- Current Assignee Address: JP Osaka JP Shizuoka
- Agency: Harness, Dickey & Pierce, P.L.C.
- Priority: JP2012-202912 20120914
- International Application: PCT/JP2013/074341 WO 20130910
- International Announcement: WO2014/042140 WO 20140320
- Main IPC: F21V9/00
- IPC: F21V9/00 ; H01L33/50 ; G01J3/52 ; G01J3/02 ; G01J3/10 ; F21K99/00 ; H05B33/08 ; F21Y101/02

Abstract:
An electronic color-chart device includes plural LEDs with different peak wavelengths and displays images to serve as color references as color charts by making the plural LEDs emit light. In a case where a light emission intensity distribution of each of the plural LEDs is normalized with a maximum intensity being a value of 1, the plural LEDs include plural first LEDs of which at least one is an LED whose full wavelength width at half maximum intensity is 40 nm or narrower and between which a peak interval is 50 nm or narrower and a second LED whose light emission intensity at a wavelength of 555 nm is 0.4 or higher, and whose full wavelength width at half maximum intensity is wider than 40 nm.
Public/Granted literature
- US20150263240A1 ELECTRONIC COLOR-CHART DEVICE Public/Granted day:2015-09-17
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