IP Library › Granted Patent US 9,207,390
Granted Patent B2
US 9,207,390 · App. 13/817,775 · Granted Dec 8, 2015

Light guide structures and display devices

Inventor: Kenichi Hashizume (Gunma, JP)
Assignee: EMPIRE TECHNOLOGY DEVELOPMENT LLC
G02B6/0075G02B6/0003G02B6/0078G02B6/0055
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Quick Facts
Patent No.
US 9,207,390
App. No.
13/817,775
Filed
Feb 19, 2013
Granted
Dec 8, 2015
Kind
B2
Art Unit
2875
USPC
362/235
Abstract

Light guide structures that include a transparent plate having a first end and a second end; and a plurality of transparent light guide members, each transparent light guide member extending from the first end to the second end along one surface of the transparent plate and being configured to emit white light in response to light applied thereto are described.

Claims (13)

1. A light guide structure, comprising:

a transparent plate having a first end and a second end;

a plurality of transparent light guide members, wherein each transparent light guide comprises a combination of a red fluorescent substance, a green fluorescent substance and a blue fluorescent substance, each transparent light guide member extending from the first end to the second end along one surface of the transparent plate and being configured to emit white light in response to light applied thereto; and

a plurality of reflection members, each reflection member being arranged between the one surface of the transparent plate and one of the plurality of transparent light guide members and being configured to reflect the applied light so as to direct the applied light to propagate within one of the plurality of transparent light guide members along the one surface of the transparent plate.

2. The light guide structure of claim 1 , wherein each reflection member has a thickness of less than about 1 micrometer.

3. A display device, comprising:

a display panel;

a light source configured to emit light;

a transparent plate having a first end and a second end wherein one surface of the transparent plate faces the display panel; and

a plurality of transparent light guide members, wherein each transparent light guide comprises a combination of a red fluorescent substance, a green fluorescent substance and a blue fluorescent substance, each transparent light guide member extending from the first end to the second end along the one surface of the transparent plate and being configured to emit white light in response to the light applied thereto.

4. The display device of claim 3 , wherein the display panel is a reflective display panel.

5. The display device of claim 3 , further comprising a plurality of reflection members, each reflection member being arranged between the one surface of the transparent plate and one of the plurality of transparent light guide members and being configured to reflect the applied light so as to direct the applied light to propagate within one of the plurality of transparent light guide members along the one surface of the transparent plate.

6. The display device of claim 5 , wherein each reflection member has a thickness of less than about 1 micrometer.

Assignments (3)
RELEASE OF SECURITY INTEREST IN PATENTS, RECORDED ON JANUARY 29, 2019, AT REEL/FRAME 048373/0217 Recorded Jun 22, 2026
From: CRESTLINE DIRECT FINANCE, L.P., AS COLLATERAL AGENT
To: EMPIRE TECHNOLOGY DEVELOPMENT LLC
Reel/Frame 075799/0053 →
RELEASE OF SECURITY INTEREST IN PATENTS, RECORDED ON JANUARY 29, 2019 AT REEL 048373 FRAME 0217 Recorded Sep 22, 2025
From: CRESTLINE DIRECT FINANCE, L.P., AS COLLATERAL AGENT
To: EMPIRE TECHNOLOGY DEVELOPMENT LLC
Reel/Frame 072936/0464 →
SECURITY INTEREST Recorded Jan 29, 2019
From: EMPIRE TECHNOLOGY DEVELOPMENT LLC
To: CRESTLINE DIRECT FINANCE, L.P.
Reel/Frame 048373/0217 →
Continuity (1)
Related Publication 20140192559A1 · Jul 10, 2014