Polarizer, a display panel having the same and a method of manufacturing the same

• US 9,494,721 B2
• Filed: 12/17/2013
• Issued: 11/15/2016
• Est. Priority Date: 06/26/2013
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Nam, Jung-Gun, An, Moon-Jung, Lee, Dae-Young, Jang, Dae-Hwan, Jo, Gug-Rae, Takakuwa, Atsushi
• Primary Examiner(s): Kim, Richard
• Application Number:
  US14/108,853
• Publication Number:
  US 20150002791A1
• Time in Patent Office: 1,064 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: G02B 5/3058 comprising electrically conductive elements, e.g. wire grids, conductive particles
• CPC Class Codes: G02F 1/133548 Wire-grid polarisers

Abstract

A polarizer includes a base substrate and a dielectric stacked layer. The dielectric stacked layer in includes a first dielectric layer and second dielectric layer. The first dielectric layer has a high refractive index and a second dielectric layer has a low refractive index. A wire grid pattern is disposed on the dielectric stacked layer. The wire grid pattern has a line width, a separation distance and a pitch. The pitch is a sum of the line width and the separation distance. Adjacent grids of the wire grid pattern are spaced apart by the separation distance.

Claims

1. A polarizer, comprising:

a base substrate;

a wire grid pattern disposed on the base substrate and having a line width, a separation distance and a pitch, wherein the pitch is a sum of the line width and the separation distance, and adjacent grids of the wire grid pattern are spaced apart by the separation distance, wherein the wire grid pattern comprises a first layer and a second layer; and

a passivation layer disposed on the wire grid pattern,

wherein the wire grid pattern comprises a first dielectric stacked layer pattern disposed between the base substrate and the first layer, and wherein the wire grid pattern comprises a second dielectric stacked layer pattern disposed between the second layer and the passivation layer.

2. The polarizer of claim 1, wherein the first dielectric stacked layer pattern comprises titanium dioxide (TiO2), and

the second dielectric stacked layer pattern comprises silicon dioxide (SiO2).

3. The polarizer of claim 1, wherein the wire grid pattern comprises a first layer comprising aluminum (Al), gold (Au), silver (Ag), copper (Cu), chrome (Cr), steel (Fe), or nickel (Ni), and a second layer comprising molybdenum (Mo), or titanium (Ti).

4. A polarizer, comprising:

a base substrate;

a wire grid pattern disposed on the base substrate and having a line width, a separation distance and a pitch, wherein the pitch is a sum of the line width and the separation distance, and adjacent grids of the wire grid pattern are spaced apart by the separation distance; and

a passivation layer disposed on the wire grid pattern,

wherein the wire grid pattern comprises a first layer and a second layer, and a first dielectric stacked layer pattern disposed between the first layer and the base substrate, and wherein the first dielectric stacked layer pattern comprises a first dielectric layer having a high refractive index and a second dielectric layer having a low refractive index, and

wherein the wire grid pattern comprises a second dielectric stacked layer pattern disposed between the second layer and the passivation layer, and wherein the second dielectric stacked layer pattern comprises a third dielectric layer having a high refractive index and a fourth dielectric layer having a low refractive index.

5. The polarizer of claim 4, wherein the first layer of the wire grid pattern is thicker than the second layer of the wire grid pattern.

6. A display panel, comprising:

a first substrate comprising;

a first base substrate;

a first wire grid pattern disposed on the first base substrate; and

a first passivation layer disposed on the first wire grid pattern,

wherein the first wire grid pattern comprises a first layer and a second layer, and a first dielectric stacked layer pattern disposed between the first layer of the first wire grid pattern and the first base substrate, and wherein the first dielectric stacked layer pattern comprises a first dielectric layer having a high refractive index and a second dielectric layer having a low refractive index, and

wherein the first wire grid pattern comprises a second dielectric stacked layer pattern disposed between the second layer of the first wire grid pattern and the first passivation layer, and wherein the second dielectric stacked layer pattern comprises a third dielectric layer having a high refractive index and a fourth dielectric layer having a low refractive index;

a second substrate facing the first substrate and comprising;

a second base substrate;

a dielectric stacked layer disposed on the second base substrate, wherein the dielectric stacked layer comprises a fifth dielectric layer having a high refractive index and a sixth dielectric layer having a low refractive index; and

a second wire grid pattern disposed on the dielectric stacked layer; and

a liquid crystal layer disposed between the first substrate and the second substrate.

7. The display panel of claim 6, further comprising a second passivation layer disposed on the second wire grid pattern,

wherein the second wire grid pattern of the second substrate comprises:

a first layer; and

a third dielectric stacked layer pattern disposed between the first layer and the second passivation layer, the third dielectric stacked layer comprising a seventh dielectric layer having a high refractive index and an eighth dielectric layer having a low refractive index.

8. The display panel of claim 7, wherein the first layer of the first wire grid pattern of the first substrate comprises aluminum (Al), gold (Au), silver (Ag), copper (Cu), chrome (Cr), steel (Fe), or nickel (Ni),

and the second layer of the first wire grid pattern of the first substrate comprises molybdenum (Mo), or titanium (Ti),

the first layer of the second wire grid pattern of the second substrate comprises aluminum (Al), gold (Au), silver (Ag), copper (Cu), chrome (Cr), steel (Fe), or nickel (Ni), and

the second wire grid pattern further comprises a second layer comprising molybdenum (Mo), or titanium (Ti).

9. The display panel of claim 6, wherein the second substrate further comprises a black matrix disposed on the second wire grid pattern, the black matrix formed in a peripheral area adjacent to a display area configured to display an image.

10. The display panel of claim 6, wherein the first wire grid pattern of the first substrate comprises a pattern having a boundary shape, the boundary shape being substantially the same as a shape of the black matrix in the peripheral area.

11. A display panel, comprising:

a first substrate comprising;

a first base substrate;

a first wire grid pattern disposed on the first base substrate and having a first line width, a first separation distance and a first pitch, wherein the first pitch is a sum of the first line width and the first separation distance, and adjacent grids of the first wire grid pattern are spaced apart by the first separation distance; and

a first passivation layer disposed on the first wire grid pattern,

wherein the first wire grid pattern of the first substrate comprises;

a first layer comprising metal;

a first dielectric stacked layer pattern disposed between the first layer and the base substrate, the first dielectric stacked layer pattern comprising a first dielectric layer having a high refractive index and a second dielectric layer having a low refractive index; and

a second dielectric stacked layer pattern disposed between the first layer and the first passivation layer, the second dielectric stacked layer pattern comprising a third dielectric layer having a high refractive index and a fourth dielectric layer having a low refractive index;

a second substrate facing the first substrate and comprising;

a second base substrate;

a dielectric stacked layer disposed on the second base substrate, wherein the dielectric stacked layer comprises a fifth dielectric layer having a high refractive index and a sixth dielectric layer having a low refractive index; and

a second wire grid pattern disposed on the dielectric stacked layer and having a second line width, a second separation distance and a second pitch, wherein the second pitch is a sum of the second line width and the second separation distance, and adjacent grids of the second wire grid pattern are spaced apart by the second separation distance; and

a liquid crystal layer disposed between the first substrate and the second substrate.

12. The display panel of claim 11, wherein the first layer of the first wire grid pattern of the first substrate comprises aluminum (Al), gold (Au), silver (Ag), copper (Cu), chrome (Cr), steel (Fe), or nickel (Ni),

the first wire grid pattern further comprises a second layer comprising molybdenum (Mo), or titanium (Ti),

a first layer of the second wire grid pattern of the second substrate comprises aluminum (Al), gold (Au), silver (Ag), copper (Cu), chrome (Cr), steel (Fe), or nickel (Ni), and

the second wire grid pattern further comprises a second layer comprising molybdenum (Mo), or titanium (Ti).

13. The display panel of claim 11, wherein the first substrate further comprises a black matrix disposed on the second wire grid pattern, the black matrix formed in a peripheral area adjacent to a display area configured to display an image.

14. The display panel of claim 11, wherein the first wire grid pattern of the first substrate comprises a pattern having a boundary shape, the boundary shape being substantially the same as a shape of the black matrix in the peripheral area.

15. The polarizer of claim 12, wherein the first layer of the first wire grid pattern of the first substrate is thicker than the second layer of the first wire grid pattern of the first substrate.