Display device having an overlapping low reflection conductive line

• US 9,299,726 B2
• Filed: 07/22/2014
• Issued: 03/29/2016
• Est. Priority Date: 11/13/2013
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Kim, Hyungjune, Yoon, YeoGeon
• Primary Examiner(s): Soward, Ida M
• Application Number:
  US14/337,978
• Publication Number:
  US 20150129985A1
• Time in Patent Office: 616 Days
• US Class Current: 1/1
• CPC Class Codes: G02F 1/133502 Antiglare, refractive index matching layers
• CPC Class Codes: G02F 1/136286 Wiring, e.g. gate line, drain line
• CPC Class Codes: G02F 1/13629 Multilayer wirings
• CPC Class Codes: G02F 2201/40 Arrangements for improving the aperture ratio
• CPC Class Codes: H01L 27/124 with a particular composition, shape or layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits wiring structures per se H01L23/52
• CPC Class Codes: H01L 29/78633 with a light shield
• CPC Class Codes: H10K 50/86 Arrangements for improving contrast, e.g. preventing reflection of ambient light
• CPC Class Codes: H10K 59/131 Interconnections, e.g. wiring lines or terminals
• CPC Class Codes: H10K 59/8791 Arrangements for improving contrast, e.g. preventing reflection of ambient light

Abstract

A display apparatus includes a first base substrate that includes an upper surface and a lower surface facing the upper surface and includes a transmission area and a light blocking area, a low reflection conductive line disposed on the lower surface of the first base substrate, in which a portion of the lower reflection conductive line is overlapped with the transmission area to transmit a portion of an incident light, a second base substrate facing the lower surface of the first base substrate, and a pixel disposed between the first and second base substrates, at least a portion of the pixel being overlapped with the transmission area.

Claims

1. A display panel, comprising:

a first substrate comprising an upper surface and a lower surface opposite to the upper surface and further comprising a transmission area and a light blocking area adjacent to the transmission area;

a low reflection conductive line disposed on the lower surface of the first substrate, a portion of the lower reflection conductive line overlapping with the transmission area, the low reflection conductive line configured to transmit a portion of an incident light;

a second substrate facing the lower surface of the first substrate; and

a pixel, at least a portion of the pixel overlapping with the transmission area, the low reflection conductive line comprising;

a metal layer disposed on the lower surface of the first substrate comprising a thickness configured to transmit the portion of the incident light; and

a transparent conductive oxide layer disposed on the metal layer.

2. The display panel of claim 1, wherein the metal layer comprises titanium.

3. The display panel of claim 2, wherein the metal layer comprises thickness in a range of 10 angstroms to 130 angstroms.

4. The display panel of claim 3, further comprising:

an insulating layer disposed on the lower surface of the first substrate, the metal layer, and the transparent conductive oxide layer.

5. The display panel of claim 4, wherein a sidewall of the metal layer is coplanar with a sidewall of the transparent conductive oxide layer.

6. The display panel of claim 4, wherein the low reflection conductive line is configured to receive a direct-current voltage.

7. The display panel of claim 6, wherein the pixel comprises:

a thin film transistor disposed on the lower surface of the first substrate and overlapping with the light blocking area; and

a pixel electrode disposed in the transmission area, overlapping with the low reflection conductive line, and electrically connected to the thin film transistor.

8. The display panel of claim 7, further comprising:

a first signal line disposed on the lower surface of the first substrate, overlapping with the light blocking area, and electrically connected to the thin film transistor; and

a second signal line disposed in the light blocking area, insulated from the first signal line to cross the first signal line, and electrically connected to the thin film transistor, and

wherein the first signal line and the second signal line are insulated by the insulating layer that covers the low reflection conductive line.

9. The display panel of claim 8, wherein the gate line comprises:

a light-transmissive first layer disposed on the lower surface of the first substrate;

a light-transmissive second layer disposed on the first layer; and

a third layer disposed on the second layer and having a conductivity higher than a conductivity of the first layer, and

wherein the first layer of the first signal line and the metal layer of the low reflection conductive line comprise the same material, and

wherein the second layer of the first signal line and the transparent conductive oxide layer of the low reflection conductive line comprise the same material.

10. The display panel of claim 7, further comprising:

a color filter layer disposed between the thin film transistor and the pixel electrode.

11. The display panel of claim 7, further comprising:

a black matrix disposed on the second substrate, the black matrix comprising an opening overlapping the transmission area; and

a common electrode disposed on the black matrix configured to form an electric field with the pixel electrode.

12. The display panel of claim 11, wherein the opening is filled with an organic material comprising a color.