Display device with light-shielding substrate and method for fabricating the same

• US 20040217681A1
• Filed: 04/30/2004
• Published: 11/04/2004
• Est. Priority Date: 05/02/2003
• Status: Abandoned Application

• Current Assignee: Samsung Mobile Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Mobile Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Park, Jin-Woo, Kim, Byung-Hee
• Application Number:
  US10/835,565
• Publication Number:
  US 20040217681A1
• Time in Patent Office: Days
• US Class Current: 313/110
• CPC Class Codes: H10K 50/80 Constructional details
• CPC Class Codes: H10K 50/841 Self-supporting sealing arrangements
• CPC Class Codes: H10K 50/856 comprising reflective means
• CPC Class Codes: H10K 50/865 comprising light absorbing layers, e.g. light-blocking layers
• CPC Class Codes: H10K 59/871 Self-supporting sealing arrangements
• CPC Class Codes: H10K 59/878 comprising reflective means
• CPC Class Codes: H10K 59/8792 comprising light absorbing layers, e.g. black layers

Abstract

A flat panel display device and process incorporating a light-shield formed on either on a substrate or an encapsulation substrate, blocking ambient external light so that contrast and efficiency are improved, may be constructed with a substrate, a display device formed on the substrate, and an encapsulation substrate that encapsulates the display device. At least one of the substrate and the encapsulation substrate have protrusions for emitting a light emitted from the display device, with each of the protrusions including an aperture on its top surface, and a light-shield. The light-shield includes a light-reflecting layer selectively formed on a side wall of each of the protrusions reflecting internally generated light, and a light-shielding layer formed on the light-reflecting layer to block external light.

Claims

1. A substrate for a flat panel display device, comprising:

a plurality of protrusions each including an aperture; and

a shielding film blocking incident light, the shielding film being formed on a surface of the substrate including the protrusions, except for the apertures.

2. The substrate according to claim 1, comprising a light-reflecting film formed under the light-shielding film.

3. The substrate according to claim 1, wherein a slanted angle between an inner side of each of the protrusions and the surface of the substrate ranges from 45°

to 90°

.

4. The substrate according to claim 1, wherein the light-shielding film is comprised of an organic black layer, an inorganic black layer, a carbon black layer, or a concentration gradient film having a concentration gradient of metal and transparent materials, absorbing the incident light.

5. The substrate according to claim 1, wherein the light-shielding film is comprised of a laminated layer structure of a metal film having a high reflectivity and an inorganic film, eliminating the incident light by interference.

6. The substrate according to claim 1, with the substrate comprising a glass or a plastic substrate.

7. The substrate according to claim 1, the substrate is a substrate, on which a display device is formed, or an encapsulation substrate.

8. A substrate for a flat panel display device, comprising:

a plurality of protrusions each including an aperture;

a light-reflecting film formed on a surface of the substrate including the protrusions, but not on the apertures; and

a light-absorbing film formed on the light-reflecting film.

9. A substrate for a flat panel display device, comprising:

a plurality of light-emitting elements formed integrally with the substrate each, of the light-emitting elements including an aperture; and

a light-shield formed on surfaces of the light-emitting elements, but not on the apertures.

10. The substrate according to claim 9, wherein the substrate is one of a substrate, on which a display device is formed, or an encapsulation substrate, the substrate being comprised of a glass or a plastic substrate.

11. The substrate according to claim 9, wherein the light-emitting elements each comprises:

a protrusion having the aperture on a distal surface, a slanted angle between an inner side of each of the protrusions and an surface of the substrate ranging from 45°

to 90°

; and

the light-shield is selectively formed on side walls of the protrusions except for the apertures.

12. The substrate according to claim 9, wherein the light-shield comprises:

a light-reflecting layer formed on side walls of the protrusions reflecting internally generated light; and

a light-absorbing layer formed on the light-reflecting layer absorbing external light so that the substrate is shielded from the external light.

13. The substrate according to claim 12, wherein the light-reflecting layer is comprised of a metal film having a high reflectivity, and the light-absorbing layer is comprised of an organic black layer, an inorganic black layer, a carbon black layer, or a concentration gradient layer of metal and inorganic materials.

14. The substrate according to claim 9, wherein the light-shielding means comprising:

a light-reflecting layer formed on side walls of the protrusions for reflecting an internal light; and

a light-interfering layer formed on the light-reflecting layer shielding the substrate from external light by eliminating the external light by an interference.

15. The substrate according to claim 14, wherein the light-reflecting layer is comprised of a thicker metal film having a high reflectivity, and the light-interfering layer is comprised of a thinner metal film having a high reflectivity and an inorganic film.

16. A flat panel display device, comprising:

a substrate;

a display device formed on the substrate; and

an encapsulation substrate for encapsulating the display device,

at least one of the substrate and the encapsulation substrate comprising a plurality of discrete protrusions emitting light generated internally with the display device, each of the protrusions including an aperture on a top surface; and

a light-shield selectively formed only on side walls of the protrusions.

17. The flat panel display device according to claim 16, wherein the substrate or encapsulation substrate is a glass or a plastic substrate.

18. The flat panel display device according to claim 16, wherein the light-shield comprises:

a light-reflecting layer formed on a side wall of each of the protrusions, the light-reflecting layer is comprised of a metal film having a high reflectivity; and

a light-shielding layer formed on the light-reflecting layer, wherein the light-shielding layer comprised of an organic black layer, an inorganic black layer, a carbon black layer, or a concentration gradient layer of metal and inorganic materials to shield by absorbing the external light, or is comprised of a thin metal and inorganic films to shield the external light by eliminating it using an interference of the external light.

19. The flat panel display device according to claim 16, wherein the protrusions are formed integrally with the substrate, and

a slanted angle between an inner side of each of the protrusions and the surface of the substrate ranges from 45°

to 90°

.

20. A flat panel display device, comprising:

a substrate;

a display device formed on the substrate;

an encapsulation substrate encapsulating the display device; and

a light-shielding film attached on at least one of the substrate and the encapsulation substrate,

comprising a plurality of discrete protrusions emitting a light emitted from the display device, each of the protrusions including an aperture on a top surface, and a light-shielding means selectively formed only on side walls of the protrusions.

21. The flat panel display device according to claim 20, wherein the light-shielding film comprises:

a light-reflecting layer selectively formed only on side walls of the protrusions, the light-reflecting layer is comprised of a metal film having a high reflectivity; and

a light-shielding layer formed on the light-reflecting layer, the light-shielding layer comprised of an organic black layer, an inorganic black layer, a carbon black layer, or a concentration gradient layer of a metal and inorganic materials to shield the external light by absorbing it, or is comprised of a thin metal and inorganic films for shielding the device from the external light by interference of the external light.

22. The flat display device according to claim 20, wherein the protrusions are formed integrally with the film, and

a slanted angle between an inner side of each of the protrusions and the film ranges from 45°

to 90°

.