GB1253325A - Image display device - Google Patents
Image display deviceInfo
- Publication number
- GB1253325A GB1253325A GB1191370A GB1191370A GB1253325A GB 1253325 A GB1253325 A GB 1253325A GB 1191370 A GB1191370 A GB 1191370A GB 1191370 A GB1191370 A GB 1191370A GB 1253325 A GB1253325 A GB 1253325A
- Authority
- GB
- United Kingdom
- Prior art keywords
- conductor
- photo
- sensitive layer
- layer
- semi
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/135—Liquid crystal cells structurally associated with a photoconducting or a ferro-electric layer, the properties of which can be optically or electrically varied
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
Abstract
1,253,325. Modulating light. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. 12 March, 1970 [15 March, 1969], No. 11913/70. Heading H4F. [Also in Division H1] In an image intensifier of the type comprising a photo-conductive layer and an electric field sensitive layer sandwiched between electrodes connected to a source of potential difference so that an image incident on the photoconductor sets up a charge pattern and thereby causes the field sensitive layer to locally modulate a projection light beam incident thereon, it is sometimes possible for the projection beam to reach the photoconductor and so reduce the contrast of the intensified image. This may be prevented by disposing a layer of semi-conductor material between the photo-conductor and field sensitive layer, such material having a direct band gap less than that of the photo-conductor, by an amount preferably not more than 0À2 eV so that it strongly absorbs radiaton corresponding to the direct band transition of the photo-conductor. Thus if the photo-conductor is copper activated CdSe (1À8 eV gap) the semi-conductor may be CdTe, GeS or Sb 2 Se 3 (1À5, 1À7 and 1À4 eV respectively) vapour deposited at room temperature to provide a fine crystalline layer with a resistivity at least equal to the dark resistivity of the photo-conductor, i.e. 10<SP>-7</SP> ohm cm. in this case. A mixture of 3 parts Sb 2 Se 3 to one of GeS is preferred. In a Schlieren optical system, Figs. 1 and 2 (not shown), the field sensitive layer (14) is deformable, e.g. of polymerized silicone oil. In Fig. 3 (not shown) the sensitive layer (36) is a nematic liquid crystal which varies in transmissivity or reflectivity according to the local electric field. A Schlieren system may again be used employing the reflectivity variation, or the variably transmitted projection beam may de reflected from a mosaic of cracked aluminium foil (35) between the liquid crystal and semi-conductor (34) layers to give direct reproduction on a screen.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL6904046A NL6904046A (en) | 1969-03-15 | 1969-03-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1253325A true GB1253325A (en) | 1971-11-10 |
Family
ID=19806427
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1191370A Expired GB1253325A (en) | 1969-03-15 | 1970-03-12 | Image display device |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE747378A (en) |
| CH (1) | CH504822A (en) |
| FR (1) | FR2037204B1 (en) |
| GB (1) | GB1253325A (en) |
| NL (1) | NL6904046A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0022564A1 (en) * | 1979-07-11 | 1981-01-21 | Fuji Photo Film Co., Ltd. | Method of and apparatus for obtaining a radiation image by use of a stimulable phosphor |
| US5260796A (en) * | 1988-05-10 | 1993-11-09 | Victor Company Of Japan, Ltd. | Apparatus detecting distribution of surface potential on a medium holding charge latent image |
| US5268763A (en) * | 1988-05-10 | 1993-12-07 | Victor Company Of Japan, Ltd. | Apparatus for recording a charge latent image on a medium and for producing color signals from the charge latent image |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1144417B (en) * | 1957-08-29 | 1963-02-28 | Zeiss Ikon Ag | Image amplifiers as well as possible uses of the same |
-
1969
- 1969-03-15 NL NL6904046A patent/NL6904046A/xx unknown
-
1970
- 1970-03-12 CH CH369970A patent/CH504822A/en not_active IP Right Cessation
- 1970-03-12 GB GB1191370A patent/GB1253325A/en not_active Expired
- 1970-03-12 FR FR7008885A patent/FR2037204B1/fr not_active Expired
- 1970-03-13 BE BE747378D patent/BE747378A/en unknown
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0022564A1 (en) * | 1979-07-11 | 1981-01-21 | Fuji Photo Film Co., Ltd. | Method of and apparatus for obtaining a radiation image by use of a stimulable phosphor |
| US5260796A (en) * | 1988-05-10 | 1993-11-09 | Victor Company Of Japan, Ltd. | Apparatus detecting distribution of surface potential on a medium holding charge latent image |
| US5268763A (en) * | 1988-05-10 | 1993-12-07 | Victor Company Of Japan, Ltd. | Apparatus for recording a charge latent image on a medium and for producing color signals from the charge latent image |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2037204A1 (en) | 1970-12-31 |
| DE2011575A1 (en) | 1970-10-01 |
| DE2011575B2 (en) | 1975-10-23 |
| NL6904046A (en) | 1970-09-17 |
| CH504822A (en) | 1971-03-15 |
| FR2037204B1 (en) | 1975-07-04 |
| BE747378A (en) | 1970-09-14 |
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