Coatable grey polarizer

1. A linear polarizer, comprising:

a blue dichroic dye compound, having its maximum visible light absorption in a wavelength range 600 nm-700 nm and a maximum dichroic ratio Kd≤12 in an entire visible wavelength range; and

a red dichroic dye compound, having its maximum visible light absorption in a wavelength range 430 nm-520 nm and a maximum dichroic ratio Kd≤16 in the entire visible wavelength range;

wherein the linear polarizer has a dichroic ratio Kd≥18 at 550 nm, and a thickness of the linear polarizer is less than or equal to 2 micrometers.

2. The linear polarizer of claim 1 , further comprising:

a violet dichroic dye compound, having its maximum visible light absorption in a wavelength range 500 nm-620 nm and a maximum dichroic ratio Kd≤16 in the entire visible wavelength range.

3. The linear polarizer of claim 1 , further comprising:

a yellow dichroic dye compound, having its maximum visible light absorption in wavelengths≤550 nm and a maximum dichroic ratio Kd≤17 in the entire visible wavelength range.

4. The polarizer of claim 1 , wherein the blue dichroic dye compound has a structure B:

wherein:

X is a SO 3 H (sulfonic) group or a salt thereof, and 1≤m≤4;

Z is a Cl (chloro) group, and 0≤p≤2; and

m+p≤4.

5. The polarizer of claim 1 , wherein the red dichroic dye compound has a structure R:

or a trans-isomer of structure R, wherein, X is a SO 3 H (sulfonic) group or a salt thereof.

6. The polarizer of claim 2 , wherein the violet dichroic dye compound has a structure Vc:

wherein:

X is a SO 3 H (sulfonic) group or a salt thereof, and 1≤m≤4;

Y is a S(═O) 2 (sulfone) group, and 0≤n≤2;

Z is a OH (hydroxy) group, and 0≤p≤4;

R is an O (oxo) group, and 0≤q≤4; and

m+p+q≤6.

7. The polarizer of claim 2 , wherein the violet dichroic dye compound has a structure Va:

or a cis-isomer of Structure Va, wherein:

X is a SO 3 H (sulfonic) group or a salt thereof, and 1≤m≤4;

Y is a S(═O) 2 (sulfone) group, and 0≤n≤2;

Z is a OH (hydroxy) group, and 0≤p≤4;

R is an O (oxo) group, and 0≤q≤4; and

m+p+q≤6.

8. The polarizer of claim 3 , wherein a yellow dichroic dye compound has a structure Y:

wherein:

X is a SO 3 H (sulfonic) group or a salt thereof, and 1≤m≤4;

Z is a Cl (chloro) group, and 0≤p≤2; and

m+p≤6.

9. A linear polarizer film, comprising:

a substrate;

a linear polarizer according to claim 1 overlying the substrate.

10. The linear polarizer film of claim 9 , wherein the substrate is selected from the group consisting of: glass, TAC, PET, PC, COP, OCA film, and anti-reflection film.

11. A pair of eyeglasses comprising a lens, said lens comprising the linear polarizer film of claim 9 .

12. A circular polarizer, comprising:

a retarder, configured as an achromatic quarter-wave plate; and

a linear polarizer according to claim 1 overlying the retarder such that the retarder and a first major surface of the linear polarizer are facing toward each other.

13. The circular polarizer of claim 12 , additionally comprising an anti-reflection coating or anti-reflection film overlying the linear polarizer such that light initially passing through the anti-reflection coating or anti-reflection film then passes through the linear polarizer before reaching the retarder.

14. An OLED display, comprising:

an OLED display panel;

a circular polarizer according to claim 12 overlying the OLED display panel.

15. A light emissive display module, comprising:

a circuit substrate;

an array of light emissive elements overlying the circuit substrate; and

a circular polarizer according to claim 12 overlying the array of light emissive elements.

16. The light emissive display module of claim 15 , wherein the circuit substrate is a CMOS circuit substrate, comprising CMOS transistors electrically connected to the light emissive elements.

17. The light emissive display module of claim 15 , wherein the circuit substrate is selected from the group consisting of, silicon and polyimide.

18. The light emissive display module of claim 15 , wherein the light emissive elements are solid state light source elements.

19. The light emissive display module of claim 18 , wherein the solid-state light source elements are light-emitting diodes (LEDs).

20. The light emissive display module of claim 18 , wherein the light emissive elements are mini-LED or micro-LED elements.