Patent US6424326B2 successfully refreshed from Google Patents.
US6424326B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor display device having a display portion and a sensor portion
Assignee: Semiconductor Energy Laboratory Co Ltd
•
Filing: 2001-01-04
•
Granted: 2002-07-23
•
Expires: 2021-01-04
Abstract
Abstract To provide a semiconductor display device capable of displaying an image having clarity and a desired color, even when the speed of deterioration of an EL layer is influenced by its environment. Display pixels and sensor pixels of an EL display each have and EL element, and the sensor pixels each have a light receiving diode or a sensor TFT. The luminance of the EL elements of each in the display pixels is controlled in accordance with the amount of electric current flowing in each of the light receiving diodes or sensor TFTs.
Inventors
- 👤 Shunpei Yamazaki
- 👤 Jun Koyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:39
CPC Classifications
H; H10; H10D; H10D86/00; H10D86/40; G; G09; G09G; G09G3/00; G09G3/20; G09G3/22; G09G3/30; G09G3/32; G09G3/3208; G09G3/3225; G09G3/3233; G09G3/3258; G09G3/3275; H10D30/00; H10D30/60; H10D30/67; H10D30/6704; H10D30/6713; H10D30/6715; H10D30/6717; H10D86/60; H10K; H10K59/00; H10K59/10; H10K59/12; H10K59/13; G09G2300/00; G09G2300/04; G09G2300/0421; G09G2300/0426; G09G2300/08; G09G2300/0809; G09G2300/0819; G09G2300/0842; G09G2300/0861; G09G2310/00; G09G2310/02; G09G2310/0264; G09G2310/027; G09G2320/00; G09G2320/02; G09G2320/0285; G09G2320/029; G09G2320/04; G09G2320/043; G09G2320/045; G09G2330/00; G09G2330/02; G09G2330/021; G09G2360/00; G09G2360/14; G09G2360/141; G09G2360/142; G09G2360/145; G09G2360/147; G09G2360/148; G09G2360/16; G09G3/2007; G09G3/2018; G09G3/2022; H10D30/6729; H10D30/6737; H10D30/6739; H10F; H10F39/00; H10F39/10; H10F39/12; H10F39/198; H10K2102/00; H10K2102/301; H10K2102/302; H10K2102/3023; H10K2102/3026; H10K50/00; H10K50/80; H10K50/85; H10K50/856; H10K59/122; H10K59/30; H10K59/35; H10K59/80; H10K59/875; H10K59/878
Claims Analysis
Total Claims: 43
Claim 1
Independent Claim
91 words
A semiconductor display device having a display portion and a sensor portion, wherein: said display portion includes a plurality of display pixels; said sensor portion includes at least one sensor pixel; each of said plurality of display pixels and said sensor pixel has a switching TFT, an EL driving TFT and an EL element; said sensor pixel has a light receiving diode; and a luminance of each of the EL elements in said plurality of display pixels is controlled by the amount of a current flowing in said light receiving diode.
Claim 2
Dependent Claim
91 words
A semiconductor display device having a display portion and a sensor portion, wherein: said display portion includes a plurality of display pixels; said sensor portion includes at least one sensor pixel; each of said plurality of display pixels and said sensor pixel has a switching TFT, an EL driving TFT and an EL element; said sensor pixel has a light receiving diode; and a luminance of each of the EL elements in said plurality of display pixels is controlled by the amount of a current flowing in said light receiving diode.
Claim 3
Dependent Claim
20 words
A semiconductor display device according to claim 1 , wherein said EL element emits the color red, green, or blue.
Claim 4
Dependent Claim
40 words
A semiconductor display device according to claim 1 , wherein said EL element comprises an anode, a cathode, and an EL layer sandwiched therebetween, and wherein said EL layer comprises a low molecular organic material or a polymer organic material.
Claim 5
Dependent Claim
25 words
A semiconductor display device according to claim 3 , wherein said low molecular organic material is made of Alq 3 (tris-8-quinolilite-aluminum) or TPD (triphenylamine derivative).
Claim 6
Dependent Claim
25 words
A semiconductor display device according to claim 3 , wherein said polymer organic material is made of PPV (polyphenylene vinylene), PVK (polyvinyl carbazole), or polycarbonate.
Claim 7
Dependent Claim
60 words
A semiconductor display device according to claim 1 , wherein said semiconductor display device is incorporated into an electronic device selected from the group consisting of a video camera, a digital camera, a goggle type display, a car navigation system, an audio reproducing system, a notebook personal computer, a game equipment, a portable information terminal and an image playback device.
Claim 8
Dependent Claim
189 words
A semiconductor display device having a display portion and a sensor portion, wherein: said display portion includes a plurality of display pixels; said sensor portion includes at least one sensor pixel; each of said plurality of display pixels and said sensor pixel has a switching TFT, an EL driving TFT, and an EL element; said sensor pixel has a reset TFT, a buffer TFT, and a light receiving diode; a drive of said EL driving TFT is controlled by said switching TFT; a luminescence of said EL element is controlled by said EL driving TFT; said buffer TFT has a gate electrode, a source region connected to a constant-current power source, and a drain region held at a fixed electric potential; an electric potential of said gate electrode and an electric potential of said drain region become equivalent when said reset TFT is ON; and a luminance of each of the EL elements in said plurality of display pixels is controlled by a change in an electric potential of said gate electrode in response to a current flowing in said light receiving diode when said reset TFT is OFF.
Claim 9
Dependent Claim
189 words
A semiconductor display device having a display portion and a sensor portion, wherein: said display portion includes a plurality of display pixels; said sensor portion includes at least one sensor pixel; each of said plurality of display pixels and said sensor pixel has a switching TFT, an EL driving TFT, and an EL element; said sensor pixel has a reset TFT, a buffer TFT, and a light receiving diode; a drive of said EL driving TFT is controlled by said switching TFT; a luminescence of said EL element is controlled by said EL driving TFT; said buffer TFT has a gate electrode, a source region connected to a constant-current power source, and a drain region held at a fixed electric potential; an electric potential of said gate electrode and an electric potential of said drain region become equivalent when said reset TFT is ON; and a luminance of each of the EL elements in said plurality of display pixels is controlled by a change in an electric potential of said gate electrode in response to a current flowing in said light receiving diode when said reset TFT is OFF.
Claim 10
Dependent Claim
20 words
A semiconductor display device according to claim 7 , wherein said EL element emits the color red, green, or blue.
Claim 11
Dependent Claim
25 words
A semiconductor display device according to claim 7 , wherein said reset TFT is an n-channel TFT and said buffer TFT is a p-channel TFT.
Claim 12
Dependent Claim
25 words
A semiconductor display device according to claim 7 , wherein said reset TFT is a p-channel TFT and said buffer TFT is an n-channel TFT.
Claim 13
Dependent Claim
40 words
A semiconductor display device according to claim 7 , wherein said EL element comprises an anode, a cathode, and an EL layer sandwiched therebetween, and wherein said EL layer comprises a low molecular organic material or a polymer organic material.
Claim 14
Dependent Claim
25 words
A semiconductor display device according to claim 11 , wherein said low molecular organic material is made of Alq 3 (tris-8-quinolilite-aluminum) or TPD (triphenylamine derivative).
Claim 15
Dependent Claim
25 words
A semiconductor display device according to claim 11 , wherein said polymer organic material is made of PPV (polyphenylene vinylene), PVK (polyvinyl carbazole), or polycarbonate.
Claim 16
Dependent Claim
60 words
A semiconductor display device according to claim 7 , wherein said semiconductor display device is incorporated into an electronic device selected from the group consisting of a video camera, a digital camera, a goggle type display, a car navigation system, an audio reproducing system, a notebook personal computer, a game equipment, a portable information terminal and an image playback device.
Claim 17
Dependent Claim
252 words
A semiconductor display device having a display portion, a sensor portion, a source signal line driver circuit, and a gate signal line driver circuit, wherein: said display portion includes a plurality of display pixels; said sensor portion includes at least one sensor pixel; each of said plurality of display pixels and said sensor pixel has a switching TFT, an EL driving TFT, and an EL element; said sensor pixel has a reset TFT, a buffer TFT, and a light receiving diode; a drive of said switching TFT is controlled by a signal that is fed to a gate electrode of said switching TFT from said gate signal line driver circuit; a drive of said EL driving TFT is controlled by a signal that is fed to a gate electrode of said EL driving TFT via said switching TFT from said source signal line driver circuit; a luminescence of said EL element is controlled by said EL driving TFT; said buffer TFT has a gate electrode, a source region connected to a constant-current power source, and a drain region held at a fixed electric potential; an electric potential of said gate electrode and an electric potential of said drain region become equivalent when said reset TFT is ON; and a luminance of each of the EL elements in said plurality of display pixels is controlled by a change in an electric potential of said gate electrode in response to a current flowing in said light receiving diode when said reset TFT is OFF.
Claim 18
Dependent Claim
252 words
A semiconductor display device having a display portion, a sensor portion, a source signal line driver circuit, and a gate signal line driver circuit, wherein: said display portion includes a plurality of display pixels; said sensor portion includes at least one sensor pixel; each of said plurality of display pixels and said sensor pixel has a switching TFT, an EL driving TFT, and an EL element; said sensor pixel has a reset TFT, a buffer TFT, and a light receiving diode; a drive of said switching TFT is controlled by a signal that is fed to a gate electrode of said switching TFT from said gate signal line driver circuit; a drive of said EL driving TFT is controlled by a signal that is fed to a gate electrode of said EL driving TFT via said switching TFT from said source signal line driver circuit; a luminescence of said EL element is controlled by said EL driving TFT; said buffer TFT has a gate electrode, a source region connected to a constant-current power source, and a drain region held at a fixed electric potential; an electric potential of said gate electrode and an electric potential of said drain region become equivalent when said reset TFT is ON; and a luminance of each of the EL elements in said plurality of display pixels is controlled by a change in an electric potential of said gate electrode in response to a current flowing in said light receiving diode when said reset TFT is OFF.
Claim 19
Dependent Claim
20 words
A semiconductor display device according to claim 15 , wherein said EL element emits the color red, green, or blue.
Claim 20
Dependent Claim
25 words
A semiconductor display device according to claim 15 , wherein said reset TFT is an n-channel TFT and said buffer TFT is a p-channel TFT.
Claim 21
Dependent Claim
25 words
A semiconductor display device according to claim 15 , wherein said reset TFT is a p-channel TFT and said buffer TFT is an n-channel TFT.
Claim 22
Dependent Claim
40 words
A semiconductor display device according to claim 15 , wherein said EL element comprises an anode, a cathode, and an EL layer sandwiched therebetween, and wherein said EL layer comprises a low molecular organic material or a polymer organic material.
Claim 23
Dependent Claim
25 words
A semiconductor display device according to claim 19 , wherein said low molecular organic material is made of Alq 3 (tris-8-quinolilite-aluminum) or TPD (triphenylamine derivative).
Claim 24
Dependent Claim
25 words
A semiconductor display device according to claim 19 , wherein said polymer organic material is made of PPV (polyphenylene vinylene), PVK (polyvinyl carbazole), or polycarbonate.
Claim 25
Dependent Claim
60 words
A semiconductor display device according to claim 15 , wherein said semiconductor display device is incorporated into an electronic device selected from the group consisting of a video camera, a digital camera, a goggle type display, a car navigation system, an audio reproducing system, a notebook personal computer, a game equipment, a portable information terminal and an image playback device.
Claim 26
Dependent Claim
196 words
A semiconductor display device having a display portion and a sensor portion, wherein: said display portion includes a plurality of display pixels; said sensor portion includes at least one sensor pixel; each of said plurality of display pixels and sensor pixel has a switching TFT, an EL driving TFT, and an EL element; said sensor pixel has a reset TFT, a buffer TFT, and a sensor TFT; a drive of said EL driving TFT is controlled by said switching TFT; a luminescence of said EL element is controlled by said EL driving TFT; said sensor TFT is constantly OFF; said buffer TFT has a gate electrode, a source region that is connected to a constant-current source, and a drain region that is held at a fixed electric potential; an electric potential of said gate electrode and an electric potential of said drain region become equivalent when said reset TFT is ON; and a luminance of each of the EL elements in said plurality of display pixels is controlled by a change in an electric potential of said gate electrode in response to an off current flowing in said sensor TFT when said reset TFT is OFF.
Claim 27
Dependent Claim
196 words
A semiconductor display device having a display portion and a sensor portion, wherein: said display portion includes a plurality of display pixels; said sensor portion includes at least one sensor pixel; each of said plurality of display pixels and sensor pixel has a switching TFT, an EL driving TFT, and an EL element; said sensor pixel has a reset TFT, a buffer TFT, and a sensor TFT; a drive of said EL driving TFT is controlled by said switching TFT; a luminescence of said EL element is controlled by said EL driving TFT; said sensor TFT is constantly OFF; said buffer TFT has a gate electrode, a source region that is connected to a constant-current source, and a drain region that is held at a fixed electric potential; an electric potential of said gate electrode and an electric potential of said drain region become equivalent when said reset TFT is ON; and a luminance of each of the EL elements in said plurality of display pixels is controlled by a change in an electric potential of said gate electrode in response to an off current flowing in said sensor TFT when said reset TFT is OFF.
Claim 28
Dependent Claim
20 words
A semiconductor display device according to claim 23 , wherein said EL element emits the color red, green, or blue.
Claim 29
Dependent Claim
32 words
A semiconductor display device according to claim 23 , wherein said reset TFT is an n-channel TFT, said buffer TFT is a p-channel TFT, and said sensor TFT is a p-channel TFT.
Claim 30
Dependent Claim
32 words
A semiconductor display device according to claim 23 , wherein said reset TFT is a p-channel TFT, said buffer TFT is an n-channel TFT, and said sensor TFT is an n-channel TFT.
Claim 31
Dependent Claim
40 words
A semiconductor display device according to claim 23 , wherein said EL element comprises an anode, a cathode, and an EL layer sandwiched therebetween, and wherein said EL layer comprises a low molecular organic material or a polymer organic material.
Claim 32
Dependent Claim
25 words
A semiconductor display device according to claim 27 , wherein said low molecular organic material is made of Alq 3 (tris-8-quinolilite-aluminum) or TPD (triphenylamine derivative).
Claim 33
Dependent Claim
25 words
A semiconductor display device according to claim 27 , wherein said polymer organic material is made of PPV (polyphenylene vinylene), PVK (polyvinyl carbazole), or polycarbonate.
Claim 34
Dependent Claim
60 words
A semiconductor display device according to claim 23 , wherein said semiconductor display device is incorporated into an electronic device selected from the group consisting of a video camera, a digital camera, a goggle type display, a car navigation system, an audio reproducing system, a notebook personal computer, a game equipment, a portable information terminal and an image playback device.
Claim 35
Dependent Claim
258 words
A semiconductor display device having a display portion, a sensor portion, a source signal line driver circuit, and a gate signal line driver circuit, wherein: said display portion includes a plurality of display pixels; said sensor portion includes at least one sensor pixel; each of said plurality of display pixels and said sensor pixel has a switching TFT, an EL driving TFT, and an EL element; said sensor pixel has a reset TFT, a buffer TFT, and a sensor TFT; said switching TFT is driven by a signal that is fed to a gate electrode of said switching TFT from said gate signal line driver circuit; a drive of said EL driving TFT is controlled by a signal that is fed to a gate electrode of said EL driving TFT via said switching TFT from said source signal line driver circuit; a luminescence of said EL element is controlled by said EL driving TFT; said sensor TFT is constantly OFF; said buffer TFT has a gate electrode, a source region that is connected to a constant-current power source, and a drain region that is held at a fixed electric potential; an electric potential of said gate electrode and an electric potential of said drain region become equivalent when said reset TFT is ON; and a luminance of each of the EL elements in said plurality of display pixels is controlled by a change in an electric potential of said gate electrode in response to an off current flowing in said sensor TFT when said reset TFT is OFF.
Claim 36
Dependent Claim
258 words
A semiconductor display device having a display portion, a sensor portion, a source signal line driver circuit, and a gate signal line driver circuit, wherein: said display portion includes a plurality of display pixels; said sensor portion includes at least one sensor pixel; each of said plurality of display pixels and said sensor pixel has a switching TFT, an EL driving TFT, and an EL element; said sensor pixel has a reset TFT, a buffer TFT, and a sensor TFT; said switching TFT is driven by a signal that is fed to a gate electrode of said switching TFT from said gate signal line driver circuit; a drive of said EL driving TFT is controlled by a signal that is fed to a gate electrode of said EL driving TFT via said switching TFT from said source signal line driver circuit; a luminescence of said EL element is controlled by said EL driving TFT; said sensor TFT is constantly OFF; said buffer TFT has a gate electrode, a source region that is connected to a constant-current power source, and a drain region that is held at a fixed electric potential; an electric potential of said gate electrode and an electric potential of said drain region become equivalent when said reset TFT is ON; and a luminance of each of the EL elements in said plurality of display pixels is controlled by a change in an electric potential of said gate electrode in response to an off current flowing in said sensor TFT when said reset TFT is OFF.
Claim 37
Dependent Claim
20 words
A semiconductor display device according to claim 31 , wherein said EL element emits the color red, green, or blue.
Claim 38
Dependent Claim
32 words
A semiconductor display device according to claim 31 , wherein said reset TFT is an n-channel TFT, said buffer TFT is a p-channel TFT, and said sensor TFT is a p-channel TFT.
Claim 39
Dependent Claim
32 words
A semiconductor display device according to claim 31 , wherein said reset TFT is a p-channel TFT, said buffer TFT is an n-channel TFT, and said sensor TFT is an n-channel TFT.
Claim 40
Dependent Claim
40 words
A semiconductor display device according to claim 31 , wherein said EL element comprises an anode, a cathode, and an EL layer sandwiched therebetween, and wherein said EL layer comprises a low molecular organic material or a polymer organic material.
Claim 41
Dependent Claim
25 words
A semiconductor display device according to claim 35 , wherein said low molecular organic material is made of Alq 3 (tris-8-quinolilite-aluminum) or TPD (triphenylamine derivative).
Claim 42
Dependent Claim
25 words
A semiconductor display device according to claim 35 , wherein said polymer organic material is made of PPV (polyphenylene vinylene), PVK (polyvinyl carbazole), or polycarbonate.
Claim 43
Dependent Claim
60 words
A semiconductor display device according to claim 31 , wherein said semiconductor display device is incorporated into an electronic device selected from the group consisting of a video camera, a digital camera, a goggle type display, a car navigation system, an audio reproducing system, a notebook personal computer, a game equipment, a portable information terminal and an image playback device.
References Cited (Backward Citations)
WO1990013148A1
Cited
US5247190A
Cited
US5399502A
Cited
JPH1092576A
Cited
US5745085A
Cited
US5886474A
Cited
US6069676A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2005-07-22 | 2006-01-21 | 2006-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-07-22 | 2010-01-21 | 2010-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-07-22 | 2014-01-21 | 2014-07-23 | $7700.00 | Window Closed / Lapsed |