Display device and method of manufacturing transparent substrate for display device

• US 8,395,305 B2
• Filed: 03/24/2009
• Issued: 03/12/2013
• Est. Priority Date: 02/26/2003
• Status: Expired due to Fees

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Fujimoto, Akira, Asakawa, Koji
• Primary Examiner(s): Guharay, Karabi
• Assistant Examiner(s): Snyder, Zachary J
• Application Number:
  US12/410,298
• Publication Number:
  US 20090179543A1
• Time in Patent Office: 1,449 Days
• Field of Search: 313498-512, 313/110
• US Class Current: 313/110
• CPC Class Codes: G02F 1/133502 Antiglare, refractive index matching layers
• CPC Class Codes: G02F 1/133512 Light shielding layers, e.g. black matrix G02F1/136209 takes precedence
• CPC Class Codes: G02F 1/133562 on the viewer side
• CPC Class Codes: G02F 1/133565 inside the LC elements, i.e. between the cell substrates
• CPC Class Codes: H01J 11/10 AC-PDPs with at least one main electrode being out of contact with the plasma
• CPC Class Codes: H01J 9/205 Applying optical coatings or shielding coatings to the vessel of flat panel displays, e.g. applying filter layers, electromagnetic interference shielding layers, anti-reflection coatings or anti-glare coatings
• CPC Class Codes: H10K 50/80 Constructional details
• CPC Class Codes: H10K 50/85 Arrangements for extracting light from the devices

Abstract

A display device comprises a substrate and a laminate structure formed on the substrate and comprising a plurality of layers including a display region. The laminate structure has a recessed/projected portions at least one of an outermost surface of display side and an interface between the layers. The projected portions of the recessed/projected portions have a mean circle-equivalent diameter ranging from 50 nm to 250 nm with the standard deviation of circle-equivalent diameter of the projected portions being within the range of 10 to 50% of the mean circle-equivalent diameter, and a mean height ranging from 100 nm to 500 nm with the standard deviation of height being within the range of 10 to 50% of the mean height. The projected portions have a circularity coefficient ranging from 0.6 to 1, and an area ratio ranging from 20 to 75%.

Claims

1. A display device comprising:

a substrate;

a laminate structure formed on the substrate and comprising a plurality of layers including a display region and an outermost layer of the laminate structure, wherein one of the outermost layer of the laminate structure and the substrate constitutes a display side outermost layer; and

recessed/projected portions formed at least one of an outermost surface of the display side outermost layer, a display side surface of the display region, and an interface existing between the display region and the display side outermost layer, projected portions of the recessed/projected portions having a mean circle-equivalent diameter ranging from 50 nm to 250 nm with the standard deviation of circle-equivalent diameter of the projected portions being within the range of 10 to 50% of the mean circle-equivalent diameter, and a mean height ranging from 100 nm to 500 nm with the standard deviation of height being within the range of 10 to 50% of the mean height; and

the projected portions having a circularity coefficient ranging from 0.6 to 1, and an occupation ratio ranging from 20 to 75%, the occupation ratio being a ratio of a total area of projected portions to a total area of the projected portions and flat portions.

2. The display device according to claim 1, wherein the substrate is a transparent substrate and constitutes the display side outermost layer;

the plurality of layers of the laminate structure comprises a pair of electrodes and a luminous layer between the pair of electrodes;

one of the pair of electrodes is formed on the transparent substrate; and

the display device is an organic EL display device.

3. The display device according to claim 1, wherein the substrate is a TFT substrate;

the plurality of layers of the laminate structure comprises a liquid crystal layer and a color filter substrate formed on the liquid crystal layer;

the color filter substrate comprises a transparent substrate having a color filter and a black matrix formed thereon;

the display side outermost layer is located on the color filter substrate; and

the display device is a liquid crystal display device.

4. The display device according to claim 1, wherein the substrate is a transparent supporting substrate;

the laminate structure comprises a pair of electrodes and an electric discharge cell between the pair of electrodes, one of the pair of electrodes is a display side transparent electrode;

the display side outermost layer is located on the display side transparent electrode; and

the display device is a plasma display device.