Light route control member

Patent metadata

Field	Value
Publication number	US-2022291564-A1
Application number	US-202017754139-A
Country	US
Kind code	A1
Filing date	Sep 11, 2020
Priority date	Sep 24, 2019
Publication date	Sep 15, 2022
Grant date	—

Abstract

A light path control member according to an embodiment comprises: a first substrate; a first electrode disposed on the first substrate; a second substrate disposed on the first substrate; a second electrode disposed below the second substrate; a light conversion unit disposed between the first electrode and the second electrode; and a power supply unit connected to the first electrode and the second electrode, wherein the light conversion unit includes a partition wall part and a receiving part that are alternately arranged, the receiving part has a light transmittance that changes in response to the application of a voltage, the receiving part includes a dispersion liquid and a plurality of light absorbing particles dispersed in the dispersion liquid, the height of the receiving part is 15 μm to 25 μm, the width of the receiving part is 1.5 μm to 2.5 μm, and the power supply unit includes a power connection part connecting an external power source and the light conversion unit, and a power switch part for turning on/off the transmission of the voltage.

First claim

1 . A light route control member comprising:
a first substrate; a first electrode disposed on an upper surface of the first substrate; a second substrate disposed on the first substrate; a second electrode disposed on a lower surface of the second substrate; a light conversion unit disposed between the first electrode and the second electrode; and a power supply unit connected to the first electrode and the second electrode, wherein the light conversion unit includes a partition wall unit and a receiving unit that are alternately disposed, wherein a light transmittance of the receiving unit is changed according to the application of the voltage, wherein the receiving unit includes a dispersion and a plurality of light absorbing particles dispersed in the dispersion, wherein a height of the receiving unit is 15 μm to 25 μm, wherein a width of the receiving unit is 1.5 μm to 2.5 μm, wherein a width of the partition wall unit is 4.5 μm to 7.5 μm, wherein the power supply unit includes a power connection unit for connecting an external power source and a light conversion unit; and a power switch unit configured to turn on-off the voltage transfer.

2 . The light route control member of claim 1 , wherein a ratio of the height to the width of the receiving portion (height/width) is 10 or less.

3 . The light route control member of claim 1 , wherein a driving voltage of the power connection unit is 5V or less.

4 . A light route control member comprising:
a first substrate; a first electrode disposed on an upper surface of the first substrate; a second substrate disposed on the first substrate; a second electrode disposed on a lower surface of the second substrate; a third substrate disposed between the first substrate and the second substrate; a third electrode disposed on a lower surface of the third substrate; a fourth electrode disposed on a upper surface of the third substrate; a first light conversion unit disposed between the first electrode and the third electrode; a second light conversion unit disposed between the second electrode and the fourth electrode; a power supply unit connected to the first electrode, the second electrode, the third electrode and the fourth electrode, wherein the first light conversion unit includes a first partition wall unit and a first receiving unit that are alternately disposed, wherein the second light conversion unit includes a second partition wall unit and a second receiving unit that are alternately disposed, wherein a light transmittance of the first and second receiving units is changed according to the application of the voltage, wherein the first and second receiving units include a dispersion and a plurality of light absorbing particles dispersed in the dispersion, wherein a height of the first and second receiving units is 15 μm to 25 μm, wherein a width of the first and second receiving units is 1.5 μm to 2.5 μm, wherein the power supply unit includes a power connection unit for connecting an external power source and a light conversion unit; and a power switch unit configured to turn on-off the voltage transfer.

5 . The light route control member of claim 4 , wherein the first light conversion unit and the second light conversion unit are driven separately from each other.

6 . The light route control member of claim 4 , wherein a thickness of the first light conversion unit is different from a thickness of the second light conversion unit.

7 . The light route control member of claim 4 , wherein the first receiving unit and the second receiving unit extend in the same direction.

8 . The light route control member of claim 4 , wherein the first receiving unit and the second receiving unit extend in the different direction.

9 . The light route control member of claim 4 , wherein the first electrode is connected to a 1-1 wiring electrode,
wherein the third electrode is connected to a 1-2 wiring electrodes, wherein the second electrode is connected to a 2-1 wiring electrode, wherein the fourth electrode is connected to a 2-2 wiring electrode; wherein the 1-1 wiring electrode, the 1-2 wiring electrode, the 2-1 wiring electrode, and the 2-2 wiring electrode are connected in parallel.

10 . A display device comprising;
a display panel; and a light route control member of claim 1 disposed on or under the display panel, wherein the display panel includes a liquid crystal display panel or an organic light emitting display panel.

11 . The light route control member of claim 4 ,
wherein a height of the first and second receiving units is 15 μm to 25 μm, wherein a width of the first and second receiving units is 1.5 μm to 2.5 μm, wherein a width of the partition wall unit is 4.5 μm to 7.5 μm.

12 . The light route control member of claim 4 , wherein a ratio of the height to the width of the receiving portion (height/width) is 10 or less.

13 . The light route control member of claim 4 , wherein the power supply unit includes a power connection unit for connecting an external power source and a light conversion unit; and a power switch unit configured to turn on-off the voltage transfer.

14 . The light route control member of claim 9 , wherein the 1-1 wiring electrode and the 1-2 wiring electrode are insulated through a first insulating layer between the 1-1 wiring electrode and the 1-2 wiring electrode;
Wherein the 2-1 wiring electrode and the 2-2 wiring electrode are insulated through a second insulating layer between the 2-1 wiring electrode and the 2-2 wiring electrode.

15 . The light route control member of claim 4 , wherein the first receiving unit and the second receiving unit are disposed overlapping each other.

16 . The light route control member of claim 15 , wherein the first receiving unit and the second receiving unit include an overlapping area and a non-overlapping area,
wherein a width of the overlapping area is greater than a width of the non-overlapping area.

17 . The light route control member of claim 16 , wherein the width of the non-overlapping area is 10% or less of the entire area.

18 . The light route control member of claim 4 , wherein the first light conversion unit and the second light conversion unit are driven simultaneously.

19 . The light route control member of claim 4 , wherein a thickness of the first light conversion unit is smaller than a thickness of the second light conversion unit.

20 . The light route control member of claim 4 , wherein a driving voltage of the power connection part is 5V or less.

Assignees

• Lg Innotek Co Ltd

Inventors

• Han Young Ju
• Lee In Hae
• Kim Byung Sook

Classifications

• G02F1/1681

  having two or more microcells partitioned by walls, e.g. of microcup type · CPC title

• G02F1/167 Primary

  by electrophoresis · CPC title

• G02F1/1323 Primary

  Arrangements for providing a switchable viewing angle · CPC title

• G02F1/1675

  Constructional details · CPC title

• G02B5/30

  Polarising elements (light-modulating devices with active elements G02F1/00) · CPC title