Light emitting element display device with light therapy device and method for driving the same

Patent metadata

Field	Value
Publication number	US-2016016003-A1
Application number	US-201514748553-A
Country	US
Kind code	A1
Filing date	Jun 24, 2015
Priority date	Jul 17, 2014
Publication date	Jan 21, 2016
Grant date	—

Abstract

A light emitting element display device can be used for light therapy. The device includes: a display panel including a plurality of light emitting elements; a retarder plate configured to convert light emitted from the plurality of light emitting elements into circularly polarized light; and a selective polarizer configured to selectively convert light supplied from the retarder plate into linearly polarized light or allow penetration of the light.

First claim

What is claimed is:

1 . A light emitting element display device having a light therapy function comprising:
a display panel comprising a plurality of light emitting elements; a retarder plate configured to convert light emitted from the plurality of light emitting elements into circularly polarized light; and a selective polarizer configured to selectively convert light supplied from the retarder plate into linearly polarized light or allow penetration of the light.

2 . The light emitting element display device of claim 1 , further comprising:
a polarization controller configured to control the selective polarizer based on selection of a display mode or a therapy mode.

3 . The light emitting element display device of claim 1 , further comprising:
a counter configured to count time from the time when the selective polarizer starts light penetration; and a polarization controller configured to compare the counted time supplied from the counter with a predetermined reference value and to control an operation of the selective polarizer based on a result of the comparison.

4 . The light emitting element display device of claim 3 , wherein the selective polarizer stops the light penetration by control of the polarization controller, when the counted time is the same as or larger than the predetermined reference value.

5 . The light emitting element display device of claim 4 , wherein the selective polarizer further carries out a polarization process by control of the polarization controller, when the light penetration is stopped.

6 . The light emitting element display device of claim 4 , wherein the polarization controller generates an alert, when the light penetration is stopped.

7 . The light emitting element display device of claim 1 , wherein the selective polarizer comprises:
a lower substrate; an upper substrate disposed to face the lower substrate; a guest-host layer disposed between the lower substrate and the upper substrate; a lower electrode and an upper electrode respectively formed on facing surfaces of the lower substrate and the upper substrate; a lower alignment layer disposed on the lower electrode; and an upper alignment layer disposed on the upper electrode.

8 . The light emitting element display device of claim 7 , wherein the guest-host layer comprises liquid crystal molecules and dichroic dyes

9 . The light emitting element display device of claim 8 , wherein an initial alignment direction of the liquid crystal molecules and the dichroic dyes is one of a vertical direction and a horizontal direction.

10 . The light emitting element display device of claim 9 , wherein a major axis of the liquid crystal molecules aligned in the horizontal direction and an optical axis of the retarder plate form an angle of about 45 degrees.

11 . The light emitting element display device of claim 1 ,
wherein the display panel comprises a substrate, and a driving circuit disposed on the substrate and configured to drive the plurality of light emitting elements; and wherein the plurality of light emitting elements is disposed on the driving circuit.

12 . A method of driving the light emitting element display device having a light therapy function comprising:
arranging a display panel comprising a plurality of light emitting elements, a retarder plate configured to convert light emitted from the plurality of light emitting elements into circularly polarized light, and a selective polarizer configured to selectively convert light supplied from the retarder plate into linearly polarized light or to allow penetration of the light; and controlling the selective polarizer based on selection of a display mode or a light therapy mode.

13 . The method of claim 12 , further comprising:
counting time from the time when the selective polarizer starts a light penetration process; and comparing the counted time with a predetermined reference value and controlling an operation of the selective polarizer based on a result of the comparison.

14 . The method of claim 13 , the method further comprising controlling the selective polarizer to stop the light penetration, when the counted time is the same as or larger than the predetermined reference value.

15 . The method of claim 14 , the method further comprising controlling the selective polarizer to further carry out a polarization process, when the light penetration is stopped.

16 . The method of claim 14 , the method further comprising generating an alert when the light penetration is stopped.

Assignees

• Samsung Display Co Ltd

Inventors

• Jo Min Gyeong
• Baek Jong In
• Won Byeong Hee
• Park Won Sang

Classifications

• G02F1/133528

  Polarisers · CPC title

• A61N2005/0653

  Organic light emitting diodes · CPC title

• G02F1/13725

  based on guest-host interaction (G02F1/13762, G02F1/13737, take precedence) · CPC title

• G02F2001/133541

  Physics · mapped topic

• G02F1/1313

  specially adapted for a particular application · CPC title