EP0375165A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Spatial light modulating element and neural network circuit
Assignee: Panasonic Holdings Corp
•
Filing: 1989-11-23
•
Granted: —
•
Expires: 2009-11-23
Abstract
Abstract A spatial light modulating element and a neural network circuit are disclosed. The element is used in pattern recognition and has an arrangement in which a photoconductive layer (103) held between conductive electrodes (101, 102) is connected in series to a liquid crystal cell (109) including a liquid crystal layer held between two opposite electrodes. Setting the rate between the area of the photoconductive layer and the area of at least one of the opposite electrodes between the liquid crystal layer is disposed, provides a highly efficient reflective and transmissive spatial light modulating element of a simple structure. Both reflective and transmissive spatial light modulating elements are applied to a neurocomputer or the like.
Inventors
- 👤 Koji Akiyama
- 👤 Hiroshi Tsutsu
- 👤 Tetsu Ogawa
- 👤 Hiroshi Tsutsui
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 12:50
CPC Classifications
G; G06; G06N; G06N3/00; G06N3/02; G06N3/06; G06N3/067; G06N3/0675; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/135; G02F1/1354; G02F1/1357
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
71 words
A spatial light modulating element, comprising: a liquid crystal cell including a liquid crystal layer held between two opposite conductive electrodes having different areas; and a photoconductive layer held between conductive electrodes and connected in series to said liquid crystal cell; and wherein the area of said photoconductive layer is less them 50% of the area of smaller one of the conductive electrodes between which the liquid crystal layer is hell.
Claim 2
Dependent Claim
71 words
A spatial light modulating element, comprising: a liquid crystal cell including a liquid crystal layer held between two opposite conductive electrodes having different areas; and a photoconductive layer held between conductive electrodes and connected in series to said liquid crystal cell; and wherein the area of said photoconductive layer is less them 50% of the area of smaller one of the conductive electrodes between which the liquid crystal layer is hell.
Claim 3
Dependent Claim
20 words
A spatial light modulating element as recited in claim 1, wherein said photoconductive layer comprises a plurality of photoconductive layers.
Claim 4
Dependent Claim
21 words
A spatial light modulating element as recited in claim 2, wherein the plurality of photoconductive layers are made of different materials.
Claim 5
Dependent Claim
18 words
A spatial light modulating element as recited in claim 1, wherein said photoconductive layer includes a depletion layer.
Claim 6
Dependent Claim
21 words
A spatial light modulating element as recited in claim 1, wherein the liquid crystal layer is made of ferrodielectric liquid crystal.
Claim 7
Dependent Claim
89 words
A neural network circuit, comprising: a light emitting element; and a plurality of spatial light modulating elements which are arrayed in parallel, and each of which includes, a liquid crystal cell with a liquid crystal layer held between two opposite conductive electrodes of different areas and a photoconductive layer held between conductive electrodes and connected inseries to said liquid crystal cell, the area of the photoconductive layer being less than 50% of the area of smaller one of the conductive electrodes between which the liquid crystal layer is held.
Claim 8
Dependent Claim
89 words
A neural network circuit, comprising: a light emitting element; and a plurality of spatial light modulating elements which are arrayed in parallel, and each of which includes, a liquid crystal cell with a liquid crystal layer held between two opposite conductive electrodes of different areas and a photoconductive layer held between conductive electrodes and connected inseries to said liquid crystal cell, the area of the photoconductive layer being less than 50% of the area of smaller one of the conductive electrodes between which the liquid crystal layer is held.
Claim 9
Dependent Claim
24 words
A neural network circuit as recited in claim 6, wherein the photoconductive layers of the spatial light modulating elements are made of different materials.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.