Title:
ILLUMINATION DEVICE, DISPLAY DEVICE, AND TV RECEIVER
Document Type and Number:
WIPO Patent Application WO/2014/196234
Kind Code:
A1
Abstract:
A backlight device (24) comprises: a light guide plate (20), the long-side end surfaces of which are light incidence surfaces (20a); and a plurality of LEDs (28) disposed in rows along the light incidence surfaces (20a) with the emission surfaces of the LEDs being oriented toward the light incidence surfaces (20a). The amount of light emitted by the LEDs (28) of a central LED group (28C) which is disposed at the center of a row of the plurality of LEDs (28) is less than the amount of light emitted by the LEDs (28) of end-side LED groups (28E) disposed at the relative ends of that row. Since there is an increased amount of light at the ends of the light incidence surfaces (20a) relative to the center of the light incidence surfaces (20a), inhomogeneity in brightness between the center and the ends of a light emission surface (20b) can be prevented or minimized even if, for example, the gaps between adjoining LEDs (28) have been made narrower and result in a greater overlapping of light at the center of the light incidence surfaces (20a) in comparison to the ends thereof.
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Inventors:
SHIMIZU TAKAHARU
Application Number:
PCT/JP2014/055018
Publication Date:
December 11, 2014
Filing Date:
February 28, 2014
Export Citation:
Assignee:
SHARP KK (JP)
International Classes:
F21S2/00; F21Y101/02
Domestic Patent References:
| WO2011104972A1 | 2011-09-01 |
Foreign References:
| JP2005026077A | 2005-01-27 | |||
| JP2009099446A | 2009-05-07 | |||
| JP2011103236A | 2011-05-26 |
Attorney, Agent or Firm:
AKATSUKI UNION PATENT FIRM (JP)
Patent business corporation dawn joint patent firm (JP)
Patent business corporation dawn joint patent firm (JP)
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