Title:
BACKLIGHT DEVICE AND DISPLAY DEVICE USING SAME
Document Type and Number:
WIPO Patent Application WO/2017/199642
Kind Code:
A1
Abstract:
The objective of the invention is to suppress the occurrence of color irregularities and collapsing of white balance when using a backlight device having a configuration in which blue LEDs and a wavelength conversion sheet are combined.
In this direct-lit type backlight device (600) having a configuration in which the blue LEDs (63) and the phosphor sheet (65) are combined in order to obtain a white light, a convex lens (67) that serves as a condenser lens is provided above each of the blue LEDs (63) mounted on an LED substrate (62). Each convex lens (67) receives light emitted from the respective blue LED (63) and delivers the light on the phosphor sheet (65) side in such a manner that the exit angle is smaller than the entry angle.
Inventors:
NAKATANI AYA
AJICHI YUHSAKU
TOMIYOSHI AKIRA
AJICHI YUHSAKU
TOMIYOSHI AKIRA
Application Number:
PCT/JP2017/014765
Publication Date:
November 23, 2017
Filing Date:
April 11, 2017
Export Citation:
Assignee:
SHARP KK (JP)
International Classes:
F21S2/00; F21V5/00; F21V5/04; F21V9/08; F21V9/16; G02F1/13357; F21Y105/16; F21Y115/10
Foreign References:
| JP2010262770A | 2010-11-18 | |||
| JP2012503273A | 2012-02-02 |
Attorney, Agent or Firm:
SHIMADA, Akihiro et al. (JP)
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