Display apparatus

• US 8,154,199 B2
• Filed: 08/17/2006
• Issued: 04/10/2012
• Est. Priority Date: 02/17/1997
• Status: Expired due to Fees

• Current Assignee: Intellectual Keystone Technology LLC (Samsung Electronics Co. Ltd.)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Ozawa, Tokuroh, Kimura, Mutsumi
• Primary Examiner(s): Williams, Joseph L
• Assistant Examiner(s): LEE, NATHANIEL J.
• Application Number:
  US11/505,459
• Publication Number:
  US 20060273996A1
• Time in Patent Office: 2,063 Days
• Field of Search: 313498-512
• US Class Current: 313/506
• CPC Class Codes: G09G 2300/0408 Integration of the drivers onto the display substrate
• CPC Class Codes: G09G 2300/0417 Special arrangements specific to the use of low carrier mobility technology
• CPC Class Codes: G09G 2300/0426 Layout of electrodes and connections
• CPC Class Codes: G09G 2300/0439 Pixel structures
• CPC Class Codes: G09G 2300/0465 Improved aperture ratio, e.g. by size reduction of the pixel circuit, e.g. for improving the pixel density or the maximum displayable luminance or brightness
• CPC Class Codes: G09G 2300/08 Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
• CPC Class Codes: G09G 2300/0809 Several active elements per pixel in active matrix panels
• CPC Class Codes: G09G 2300/0842 forming a memory circuit, e.g. a dynamic memory with one capacitor
• CPC Class Codes: G09G 2300/0847 being a dynamic memory without any storage capacitor, i.e. with use of parasitic capacitances as storage elements
• CPC Class Codes: G09G 2300/0876 Supplementary capacities in pixels having special driving circuits and electrodes instead of being connected to common electrode or ground; Use of additional capacitively coupled compensation electrodes
• CPC Class Codes: G09G 2310/0254 Control of polarity reversal in general, other than for liquid crystal displays
• CPC Class Codes: G09G 2310/0256 with the purpose of reversing the voltage across a light emitting or modulating element within a pixel
• CPC Class Codes: G09G 2310/0262 The addressing of the pixel, in a display other than an active matrix LCD, involving the control of two or more scan electrodes or two or more data electrodes, e.g. pixel voltage dependent on signals of two data electrodes
• CPC Class Codes: G09G 2310/0283 Arrangement of drivers for different directions of scanning
• CPC Class Codes: G09G 2310/06 Details of flat display driving waveforms
• CPC Class Codes: G09G 2320/043 Preventing or counteracting the effects of ageing
• CPC Class Codes: G09G 2330/021 Power management, e.g. power saving
• CPC Class Codes: G09G 3/006 Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays testing individual LED's G01R31/2635; testing lamps G01R31/44; testing of optical features of LCD displays G02F1/1309
• CPC Class Codes: G09G 3/3233 with pixel circuitry controlling the current through the light-emitting element
• CPC Class Codes: G09G 3/3258 with pixel circuitry controlling the voltage across the light-emitting element
• CPC Class Codes: G09G 3/3266 : Details of drivers for scan electrodes
• CPC Class Codes: H10K 2102/3026 : Top emission
• CPC Class Codes: H10K 50/81 : Anodes
• CPC Class Codes: H10K 50/828 : Transparent cathodes, e.g. comprising thin metal layers
• CPC Class Codes: H10K 50/86 : Arrangements for improving contrast, e.g. preventing reflection of ambient light
• CPC Class Codes: H10K 50/865 : comprising light absorbing layers, e.g. light-blocking layers
• CPC Class Codes: H10K 59/12 : Active-matrix OLED [AMOLED] displays
• CPC Class Codes: H10K 59/1213 : the pixel elements being TFTs
• CPC Class Codes: H10K 59/122 : Pixel-defining structures or layers, e.g. banks
• CPC Class Codes: H10K 59/131 : Interconnections, e.g. wiring lines or terminals
• CPC Class Codes: H10K 59/8051 : Anodes
• CPC Class Codes: H10K 59/80524 : Transparent cathodes, e.g. comprising thin metal layers
• CPC Class Codes: H10K 71/135 : using ink-jet printing

Abstract

An electroluminescent apparatus having a substrate and a transistor formed above the substrate and having a gate electrode and a semiconductor film. The electroluminescent apparatus having a first insulation film including a first contact hole and a junction electrode contacted to the semiconductor film through the first contact hole. The electroluminescent apparatus having a second insulation film formed above the junction electrode and the first insulation film and including a second contact hole and a pixel electrode formed on the second insulation film and contacted to the junction electrode through the second contact hole. The electroluminescent apparatus having an insulating layer formed above the second insulation film, an organic semiconductor film formed at an emitting region above the pixel electrode, and an opposite electrode formed above the organic semiconductor film and insulating layer. The insulating layer surrounding the emitting region and overlapping the second contact hole.

Claims

1. An electroluminescent apparatus comprising:

a pixel comprising;

a transistor having a gate electrode and a semiconductor film;

a first insulation film including a first contact hole, the first insulation film being disposed above the transistor;

a junction electrode connected to the semiconductor film through the first contact hole;

a second insulation film disposed above the junction electrode and the first insulation film and including a second contact hole;

a pixel electrode disposed above the second insulation film and connected to the junction electrode through the second contact hole; and

an organic semiconductor film disposed corresponding to the pixel electrode and not overlapping the first contact hole in a plane view;

an opposite electrode disposed above the organic semiconductor film; and

an insulating layer disposed above the second insulation film, the insulating layer overlapping the second contact hole, and at least a part of the insulating layer being directly above a region where the pixel electrode and the junction electrode overlap.

2. The electroluminescent apparatus according to claim 1, further comprising a power supply line supplying a current to the pixel electrode through the transistor, the power supply line being covered with the second insulation film.

3. The electroluminescent apparatus according to claim 1, further comprising a data line supplying a signal to the transistor, the signal controlling a current flowing through the pixel electrode, the data line being covered with the second insulation film.

4. An electroluminescent apparatus comprising:

a transistor that has a gate electrode and a first semiconductor film;

a first insulating film in which a first contact hole is formed, the first insulating film being disposed over the first semiconductor film;

a junction electrode that is connected to the first semiconductor film through the first contact hole;

a second insulating film in which a second contact hole is formed, the second insulating film being disposed over the junction electrode;

a pixel electrode that is disposed above the second insulating film, the pixel electrode being connected to the junction electrode through the second contact hole;

a second semiconductor film that is formed of an organic material, the second semiconductor film being disposed at a position corresponding to the pixel electrode, the second semiconductor film not overlapping the first contact hole;

an opposite electrode; and

a third insulating film that is disposed between the second insulating film and the opposite electrode,

the second semiconductor film being disposed between the pixel electrode and the opposite electrode, and

the third insulating film overlapping at least a part of the second contact hole and at least a part of the pixel electrode.

5. The electroluminescent apparatus according to claim 4,

the third insulating film overlapping a connection part of the pixel electrode, the connection part being connected to the junction electrode through the second contact hole.

6. The electroluminescent apparatus according to claim 5,

the third insulating film overlapping the gate electrode.

7. The electroluminescent apparatus according to claim 4,

the third insulating film not being formed between the second semiconductor film and the opposite electrode.

8. The electroluminescent apparatus according to claim 4,

the third insulating film not overlapping the second semiconductor film.

9. The electroluminescent apparatus according to claim 4,

the second semiconductor film emitting a light when a current flows through the semiconductor film.