Polarizer and fabrication method thereof, display panel, and display device

• US 10,295,715 B2
• Filed: 02/02/2016
• Issued: 05/21/2019
• Est. Priority Date: 02/13/2015
• Status: Active Grant

• Current Assignee: Shanghai Tianma Micro-Electronics Company Limited (Tianma Microelectronics Company Limited), Tianma Microelectronics Company Limited
• Original Assignee: Shanghai Tianma Micro-Electronics Company Limited (Tianma Microelectronics Company Limited), Tianma Microelectronics Company Limited
• Inventors: Huang, Zhongshou, Zhang, Long, Cao, Zhaokeng
• Primary Examiner(s): Allen, Stephone B
• Assistant Examiner(s): Booher, Adam W
• Application Number:
  US15/013,860
• Publication Number:
  US 20160238766A1
• Time in Patent Office: 1,204 Days
• CPC Class Codes: G02B 5/201 in the form of arrays
• CPC Class Codes: G02B 5/305 including organic materials, e.g. polymeric layers
• CPC Class Codes: G02B 5/3058 comprising electrically conductive elements, e.g. wire grids, conductive particles
• CPC Class Codes: G02F 1/133528 Polarisers
• CPC Class Codes: G02F 1/133538 with spatial distribution of the polarisation direction

Abstract

A polarizer and fabrication method thereof, a display panel and a display device are provided. The polarizer includes an organic film capable of being aligned during a polarization treatment. The organic film includes at least one first region having a first polarization axis and at least one second region having a second polarization axis. A direction of the first polarization axis is different from a direction of the second polarization axis.

Claims

1. A display panel, comprising:

a first substrate, wherein the first substrate is a color film substrate including a color film, a first organic layer, and a first alignment layer sequentially disposed on an inner surface of the first substrate; and

a second substrate arranged opposite to the first substrate, wherein the second substrate is an array substrate including a gate layer, a semiconductor layer, a second organic layer, and a second alignment layer sequentially disposed on an inner surface of the second substrate, the inner surface of the second substrate facing the inner surface of the first substrate;

wherein the first organic layer is an overcoat layer made of resin, and the second organic layer is a planarization layer made of resin,

a polarizing-material is doped into the first organic layer and the second organic layer, and the polarizing-material includes a dichroic dye having an optical alignment capability, and

the dichroic dye includes one or more of a compound having a chemical structural formula (2) and a compound having a chemical structural formula (3),

2. A display device including a display panel according to claim 1.

3. The display panel according to claim 1, wherein:

the dichroic dye contains an azo group or a trans-stilbene group.

4. The display panel according to claim 3, wherein:

the dichroic dye includes one or more of azo dye, anthraquinone dye, biphenyl dye, tri-phenyl methane dye and derivative, single or multi-methane dye, polycyclic dye and trans-stilbene dye.

5. The display panel according to claim 4, wherein:

the dichroic dye incorporates electron donor groups or electron acceptor groups at molecular terminals.

6. The display panel according to claim 1, further including:

a base-material doped into the first organic layer and the second organic layer, wherein the base-material has the optical alignment capability.

7. The display panel according to claim 6, wherein:

the base-material is polyimide having cyclobutane groups, poly-cinnamoyl derivatives or azo-type optical alignment material.

8. The display panel according to claim 1, wherein:

the color film and the first organic layer are disposed on the inner surface of the first substrate, and

the gate layer, the semiconductor layer, and the second organic layer are disposed on the inner surface of the second substrate.

9. The display panel according to claim 1, wherein:

the first organic layer and the second organic layer which are doped with the polarizing-material include at least one first region having a first polarization axis and at least one second region having a second polarization axis, and

a direction of the first polarization axis is configured to be different from a direction of the second polarization axis, such that a wide viewing angle is achieved in the display panel.

10. The display panel according to claim 9, wherein:

the first organic layer and the second organic layer which are doped with the polarizing-material further include at least one third region having a third polarization axis and at least one fourth region having a fourth polarization axis,

wherein a direction of the third polarization axis is different from the direction of the first polarization axis and the direction of the second polarization axis, and

a direction of the fourth polarization axis is different from the direction of the first polarization axis and the direction of the second polarization axis.

11. A fabrication method for a polarizer in a display panel comprising a first substrate, wherein the first substrate is a color film substrate including a color film, a first organic layer, and a first alignment layer sequentially disposed on an inner surface of the first substrate;

and a second substrate arranged opposite to the first substrate, wherein the second substrate is an array substrate including a gate layer, a semiconductor layer, a second organic layer, and a second alignment layer sequentially disposed on an inner surface of the second substrate, the inner surface of the second substrate facing the inner surface of the first substrate;

wherein the first organic layer is an overcoat layer made of resin, and the second organic layer is a planarization layer made of resin, wherein the fabrication method for the polarizer comprises;

providing a substrate;

forming a polarizing material layer by coating a based-material doped with a polarizing-material or a based-material precursor doped with a polarizing-material on the substrate, wherein the polarizing material layer includes at least one first region and at least one second region, and the polarizing-material is aligned to have a polarizing capability when irradiated by light or electromagnetic waves;

providing a first photomask transparent to the at least one first region;

irradiating light or electromagnetic waves having a first polarization direction on the at least one first region, wherein the irradiated at least one first region has a first polarization axis;

rotating the substrate in horizontal direction, such that an angle between the first polarization direction of the light or the electromagnetic waves and a plane of the polarizing material layer is changed;

providing a second photomask transparent to the at least one second region; and

irradiating the light or the electromagnetic waves having the first polarization direction on the at least one second region, wherein the irradiated at least one second region has a second polarization axis, and a direction of the first polarization axis is different from a direction of the second polarization axis,

wherein the polarizing material layer is the first organic layer and the second organic layer, such that the polarizer is fabricated on the first substrate and the second substrate, and a wide viewing angle is achieved in the display panel comprising the polarizer,

the polarizing-material includes a dichroic dye having an optical alignment capability, and

the dichroic dye includes one or more of a compound having a chemical structural formula (2) and a compound having a chemical structural formula (3),

12. The fabrication method according to claim 11, further including:

pre-baking the polarizing material layer;

irradiating the light or the electromagnetic waves transmitted through the photomask on the polarizing material layer; and

post-baking the polarizing material layer.

13. The fabrication method according to claim 12, wherein:

the light or the electromagnetic waves has an energy of approximately 300 mj-1000 mj.

14. The fabrication method according to claim 12, wherein:

the pre-baking has a temperature of approximately 90°

C.-130°

C. and a time period of approximately 60 s-120 s.

15. The fabrication method according to claim 12, wherein:

the post-baking has a temperature of approximately 210°

C.-230°

C. and a time period of approximately 20 mins-50 mins.

16. A fabrication method for a polarizer in a display panel comprising a first substrate, wherein the first substrate is a color film substrate including a color film, a first organic layer, and a first alignment layer sequentially disposed on an inner surface of the first substrate;

and a second substrate arranged opposite to the first substrate, wherein the second substrate is an array substrate including a gate layer, a semiconductor layer, a second organic layer, and a second alignment layer sequentially disposed on an inner surface of the second substrate, the inner surface of the second substrate facing the inner surface of the first substrate;

wherein the first organic layer is an overcoat layer made of resin, and the second organic layer is a planarization layer made of resin, wherein the fabrication method for the polarizer comprises;

providing a substrate;

forming a polarizing material layer by coating a based-material doped with a polarizing-material or a based-material precursor doped with a polarizing-material on the substrate, wherein the polarizing material layer includes at least one first region and at least one second region, and the polarizing-material is aligned to have a polarizing capability when irradiated by light or electromagnetic waves;

providing a first photomask transparent to the at least one first region;

irradiating light or electromagnetic waves having a first polarization direction on the at least one first region, wherein the irradiated at least one first region has a first polarization axis;

providing a second photomask transparent to the at least one second region; and

irradiating light or electromagnetic waves having a second polarization direction on the at least one second region, wherein the irradiated at least one second region has a second polarization axis, and a direction of the first polarization axis is different from a direction of the second polarization axis,

wherein the polarizing material layer is the first organic layer and the second organic layer, such that the polarizer is fabricated on the first substrate and the second substrate, and a wide viewing angle is achieved in the display panel comprising the polarizer,

the polarizing-material includes a dichroic dye having an optical alignment capability, and

the dichroic dye includes one or more of a compound having a chemical structural formula (2) and a compound having a chemical structural formula (3),

17. The fabrication method according to claim 16, further including:

providing a metal grating converting unpolarized light or unpolarized electromagnetic waves incident on the metal grating to polarized light or polarized electromagnetic waves, such that the light or the electromagnetic waves transmitted through the metal grating have the first direction; and

rotating the metal grating by a certain angle after irradiating the light or the electromagnetic waves having the first polarization direction on the at least one first region, such that the light or the electromagnetic waves transmitted through the metal grating has the second polarization direction.

18. The fabrication method according to claim 17, wherein:

the metal grating has a comparable or an identical dimension as the at least one first region or the at least one second region.

19. A fabrication method for a polarizer in a display panel comprising a first substrate, wherein the first substrate is a color film substrate including a color film, a first organic layer, and a first alignment layer sequentially disposed on an inner surface of the first substrate;

and a second substrate arranged opposite to the first substrate, wherein the second substrate is an array substrate including a gate layer, a semiconductor layer, a second organic layer, and a second alignment layer sequentially disposed on an inner surface of the second substrate, the inner surface of the second substrate facing the inner surface of the first substrate;

wherein the first organic layer is an overcoat layer made of resin, and the second organic layer is a planarization layer made of resin, wherein the fabrication method for the polarizer comprises;

providing a substrate;

forming a polarizing material layer by coating a based-material doped with a polarizing-material or a based-material precursor doped with a polarizing-material on the substrate, wherein the polarizing material layer includes at least one first region and at least one second region, and the polarizing-material is aligned to have a polarizing capability when irradiated by light or electromagnetic waves;

providing a photomask having at least one third-region corresponding to the at least one first region and at least one fourth-region corresponding to the at least one second region; and

irradiating light or electromagnetic waves transmitted through the photomask on the at least one first region and the at least one second region,

wherein the photomask converts unpolarized light or unpolarized electromagnetic waves incident on the photomask to polarized light or polarized electromagnetic waves, and the light or the electromagnetic waves transmitted through the at least one third-region and the at least one fourth-region have different polarization directions,

wherein the irradiated at least one first region has a first polarization axis, the irradiated at least one second region has a second polarization axis, and a direction of the first polarization axis is different from a direction of the second polarization axis,

wherein the polarizing material layer is the first organic layer and the second organic layer, such that the polarizer is fabricated on the first substrate and the second substrate, and a wide viewing angle is achieved in the display panel comprising the polarizer, and

wherein the polarizing-material includes a dichroic dye having an optical alignment capability, and the dichroic dye includes one or more of a compound having a chemical structural formula (2) and a compound having a chemical structural formula (3),