US5296922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Projection television with a wavelength-selection-type rear projection screen
Assignee: Panasonic Holdings Corp
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Filing: 1992-03-17
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Granted: 1994-03-22
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Expires: 2012-03-17
Abstract
Abstract A projection television has a rear projection screen including a Fresnel lens and a lenticular lens, and a smoke sheet. The screen is characterized in that a dye or a pigment is mixed into the lenticular lens sheet or the smoke sheet which thereby has a waveform selection transmittance having the following transmittance values: ≧65% when incident light wavelength is <490 nm. ≦60% when incident light wavelength is 490 nm-660 nm. wherein the transmittance, for incident light wavelength 490 nm-580 nm., is substantially different from the transmittance when the wavelength is 580 nm.-660 nm.
Inventors
- 👤 Katsuaki Mitani
- 👤 Noboru Yasumatsuya
- 👤 Yoshiki Tsujita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:41
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/74; H04N5/7408; G; G03; G03B; G03B21/00; G03B21/54; G03B21/56; G03B21/60; G03B21/62; G03B21/625; H04N9/00; H04N9/12; H04N9/31
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
150 words
A projection television having a rear projection screen including a Fresnel lens sheet and a lenticular lens sheet, wherein a dye or a pigment is mixed into the lenticular lens sheet which thereby has a waveform selection transmittance, wherein the transmittance of the rear projection screen is equal to or more than 65% when the wavelength of the incident light is less than 490 nm, wherein the transmittance of the rear projection screen is equal to or less than 60% when the wavelength of the incident light is within a range from 490 nm to 660 nm, and wherein the transmittance of the rear projection screen corresponding to the incident light, the wavelength of which is within a range from 490 nm to 580 nm, is substantially different from the transmittance corresponding to the incident light, the wavelength of which is within a range from 580 nm to 660 nm.
Claim 2
Dependent Claim
150 words
A projection television having a rear projection screen including a Fresnel lens sheet and a lenticular lens sheet, wherein a dye or a pigment is mixed into the lenticular lens sheet which thereby has a waveform selection transmittance, wherein the transmittance of the rear projection screen is equal to or more than 65% when the wavelength of the incident light is less than 490 nm, wherein the transmittance of the rear projection screen is equal to or less than 60% when the wavelength of the incident light is within a range from 490 nm to 660 nm, and wherein the transmittance of the rear projection screen corresponding to the incident light, the wavelength of which is within a range from 490 nm to 580 nm, is substantially different from the transmittance corresponding to the incident light, the wavelength of which is within a range from 580 nm to 660 nm.
Claim 3
Dependent Claim
149 words
A projection television having a rear projection screen including a Fresnel lens sheet and a lenticular lens sheet, wherein a dye or a pigment is mixed into the lenticular lens sheet which thereby has a waveform selection transmittance, wherein the transmittance of the rear projection screen is equal to or more than 65% when the wavelength of the incident light is less than 490 nm, wherein the transmittance of the rear projection screen is equal to or less than 60% when the wavelength of the incident light is within a range from 490 nm to 660 nm, and wherein the transmittance of the rear projection screen corresponding to the incident light, the wavelength of which is within a range from 490 nm to 580 nm, is larger than the transmittance corresponding to the incident light, the wavelength of which is within a range from 580 nm to 660 nm.
Claim 4
Dependent Claim
149 words
A projection television having a rear projection screen including a Fresnel lens sheet and a lenticular lens sheet, wherein a dye or a pigment is mixed into the lenticular lens sheet which thereby has a waveform selection transmittance, wherein the transmittance of the rear projection screen is equal to or more than 65% when the wavelength of the incident light is less than 490 nm, wherein the transmittance of the rear projection screen is equal to or less than 60% when the wavelength of the incident light is within a range from 490 nm to 660 nm, and wherein the transmittance of the rear projection screen corresponding to the incident light, the wavelength of which is within a range from 490 nm to 580 nm, is larger than the transmittance corresponding to the incident light, the wavelength of which is within a range from 580 nm to 660 nm.
Claim 5
Dependent Claim
149 words
A projection television having a rear projection screen including a Fresnel lens sheet and a lenticular lens sheet, wherein a dye or a pigment is mixed into the lenticular lens sheet which thereby has a waveform selection transmittance, wherein the transmittance of the rear projection screen is equal to or more than 65% when the wavelength of the incident light is less than 490 nm, wherein the transmittance of the rear projection screen is equal to or less than 60% when the wavelength of the incident light is within a range from 490 nm to 660 nm, and wherein the transmittance of the rear projection screen corresponding to the incident light, the wavelength of which is within a range from 490 nm to 580 nm, is smaller than the transmittance corresponding to the incident light, the wavelength of which is within a range from 580 nm to 660 nm.
Claim 6
Dependent Claim
149 words
A projection television having a rear projection screen including a Fresnel lens sheet and a lenticular lens sheet, wherein a dye or a pigment is mixed into the lenticular lens sheet which thereby has a waveform selection transmittance, wherein the transmittance of the rear projection screen is equal to or more than 65% when the wavelength of the incident light is less than 490 nm, wherein the transmittance of the rear projection screen is equal to or less than 60% when the wavelength of the incident light is within a range from 490 nm to 660 nm, and wherein the transmittance of the rear projection screen corresponding to the incident light, the wavelength of which is within a range from 490 nm to 580 nm, is smaller than the transmittance corresponding to the incident light, the wavelength of which is within a range from 580 nm to 660 nm.
Claim 7
Dependent Claim
151 words
A projection television having a rear projection screen including a Fresnel lens sheet, a lenticular lens sheet and a smoke sheet, wherein a dye or a pigment is mixed into the smoke sheet which thereby has a waveform selection transmittance, wherein the transmittance of the rear projection screen is equal to or more than 65% when the wavelength of the incident light is less than 490 nm, wherein the transmittance of the rear projection screen is equal to or less than 60% when the wavelength of the incident light is within a range from 490 nm to 660 nm, and wherein the transmittance of the rear projection screen corresponding to the incident light, the wavelength of which is within a range from 490 nm to 580 nm, is smaller than the transmittance corresponding to the incident light, the wavelength of which is within a range from 580 nm to 660 nm.
Claim 8
Dependent Claim
151 words
A projection television having a rear projection screen including a Fresnel lens sheet, a lenticular lens sheet and a smoke sheet, wherein a dye or a pigment is mixed into the smoke sheet which thereby has a waveform selection transmittance, wherein the transmittance of the rear projection screen is equal to or more than 65% when the wavelength of the incident light is less than 490 nm, wherein the transmittance of the rear projection screen is equal to or less than 60% when the wavelength of the incident light is within a range from 490 nm to 660 nm, and wherein the transmittance of the rear projection screen corresponding to the incident light, the wavelength of which is within a range from 490 nm to 580 nm, is smaller than the transmittance corresponding to the incident light, the wavelength of which is within a range from 580 nm to 660 nm.
Claim 9
Dependent Claim
151 words
A projection television having a rear projection screen including a Fresnel lens sheet, a lenticular lens sheet and a smoke sheet, wherein a dye or a pigment is mixed into the smoke sheet which thereby has a waveform selection transmittance, wherein the transmittance of the rear projection screen is equal to or more than 65% when the wavelength of the incident light is less than 490 nm, wherein the transmittance of the rear projection screen is equal to or less than 60% when the wavelength of the incident light is within a range from 490 nm to 660 nm, and wherein the transmittance of the rear projection screen corresponding to the incident light, the wavelength of which is within a range from 490 nm to 580 nm, is larger than the transmittance corresponding to the incident light, the wavelength of which is within a range from 580 nm to 660 nm.
Claim 10
Dependent Claim
151 words
A projection television having a rear projection screen including a Fresnel lens sheet, a lenticular lens sheet and a smoke sheet, wherein a dye or a pigment is mixed into the smoke sheet which thereby has a waveform selection transmittance, wherein the transmittance of the rear projection screen is equal to or more than 65% when the wavelength of the incident light is less than 490 nm, wherein the transmittance of the rear projection screen is equal to or less than 60% when the wavelength of the incident light is within a range from 490 nm to 660 nm, and wherein the transmittance of the rear projection screen corresponding to the incident light, the wavelength of which is within a range from 490 nm to 580 nm, is larger than the transmittance corresponding to the incident light, the wavelength of which is within a range from 580 nm to 660 nm.
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