EP0199526A2 — Method and system for data display and input via …

Claim 1

Independent Claim 82 words

Image handling apparatus comprising: a laser beam generator for generating a laser beam; a thermally writable liquid crystal plate; a laser beam scanning device interposed in the path of the laser beam for scanning the laser beam across said liquid crystal plate; a projection screen; a light source for projecting an image written in said liquid crystal plate onto said projection screen; and a transparent data input tablet overlying said projection screen for electrically sensing a desired point on said projection screen.

Claim 2

Dependent Claim 82 words

Image handling apparatus comprising: a laser beam generator for generating a laser beam; a thermally writable liquid crystal plate; a laser beam scanning device interposed in the path of the laser beam for scanning the laser beam across said liquid crystal plate; a projection screen; a light source for projecting an image written in said liquid crystal plate onto said projection screen; and a transparent data input tablet overlying said projection screen for electrically sensing a desired point on said projection screen.

Claim 3

Dependent Claim 33 words

Image handling apparatus as cited in claim 1, wherein said laser beam generator includes a laser beam modulator for modulating said laser beam in accordance with image data stored in an image memory.

Claim 4

Dependent Claim 30 words

Image handling apparatus as cited in claim 1, further comprising a laser detector which receives said laser beam passing through said liquid crystal plate on which said image is written.

Claim 5

Dependent Claim 36 words

Image handling apparatus as cited in claim 1, wherein said transparent data input tablet includes tablet pen which picks up scanning pulses applied to transparent electrodes of a tablet plate of the transparent data input tablet.

Claim 6

Independent Claim 115 words

A system for displaying images comprising: a screen on which said images are to be displayed; first means, including a transparent plate overlaying said screen, for accepting manual input of position data through said transparent plate and generating image signals, said transparent plate having a plurality of -addresses arranged in a. predetermined arrangement; an image-forming device having a plurality of pixels arranged in correspondance to said predetermined arrangement of said addresses of said transparent plate: second means for generating a scanning beam to scan said image-forming device according to the input data for forming images corresponding to said input data; and third means for projecting said images formed on said image-forming device on said screen.

Claim 7

Independent Claim 115 words

A system for displaying images comprising: a screen on which said images are to be displayed; first means, including a transparent plate overlaying said screen, for accepting manual input of position data through said transparent plate and generating image signals, said transparent plate having a plurality of -addresses arranged in a. predetermined arrangement; an image-forming device having a plurality of pixels arranged in correspondance to said predetermined arrangement of said addresses of said transparent plate: second means for generating a scanning beam to scan said image-forming device according to the input data for forming images corresponding to said input data; and third means for projecting said images formed on said image-forming device on said screen.

Claim 8

Dependent Claim 37 words

A system as set forth in claim 5, wherein said input signal produced by said first means is in the form of an address signal designating a specific pixel corresponding to the address of said transparent plate.

Claim 9

Dependent Claim 53 words

A system as set forth in claim 6, wherein said transparent plate comprises a touch tablet. associated with a tablet pen serving as manual input means, and said address signal produced by said first means is representative of the address of a point on said touch tablet plate touched by said tablet pen.

Claim 10

Dependent Claim 41 words

A system as set forth in claim 5, wherein said second means comprises a laser beam generator and scanning means for scanning a laser beam generated by said laser beam generator and serving as said scanning beam across said image-forming device.

Claim 11

Dependent Claim 18 words

A system as set forth in claim 5, wherein said image-forming device comprises a thermally writable liquid crystal.

Claim 12

Dependent Claim 33 words

1 0. A system as set forth in claim 5, which further comprises fourth means for erasing the image formed on said image-forming device and thereby erasing the image projected on said screen.

Claim 13

Dependent Claim 63 words

A system as set forth in claim 10, wherein said fourth means is selectively operable in a first erasure mode for fully erasing the entire image on said image-forming device and a second erasure mode for erasing a part of the image formed on said image-forming device, in said second erasure mode, the part of said image to be erased being manually designated.

Claim 14

Dependent Claim 51 words

A system as.set forth in claim 11, wherein said transparent plate comprises a touch tablet associated with a tablet pen serving as manual input means, and said address signal produced by said first means is representative of the address of the point on said tablet plate touched by said tablet pen.

Claim 15

Dependent Claim 43 words

A system as set forth in claim 12, wherein said fourth means includes an erasure voltage generator for generating an erasure voltage variable between a given higher voltage in said first erasure mode and a given lower voltage in said second erasure mode.

Claim 16

Dependent Claim 66 words

A system as set forth in claim 13, wherein said first given voltage is sufficiently high to erase the entire image on said image-forming device, and said second given voltage is low enough not to erase the image alone, but said second given voltage being sufficiently high to erase points or areas of said image on said input image-forming device in cooperation with said scanning beam.

Claim 17

Dependent Claim 24 words

1 5. A system as set forth in claim 5, which further comprises fifth means for receiving said image data for storing said data.

Claim 18

Dependent Claim 30 words

A system as set forth in claim 15, wherein said fifth means is associated with said second means for receiving said scanning beam for reading out said image data therefrom.

Claim 19

Dependent Claim 31 words

1 7. A system as set forth in claim 16, wherein said fifth means further includes a synchronizing signal generator for storing said image data in conjunction with said synchronizing signal.

Claim 20

Independent Claim 121 words

A method for displaying a graphic image on a display screen, comprising the steps of: accepting manual input of said graphic data and converting input data into image component, each being representative of the address of an input image - component; providing a thermally writable device including a plurality of pixels, each corresponding to one of a plurality of addresses on said display screen: generating a laser beam and scanning said thermally writable device on the basis of said input data component indicative data for forming an image corresponding to the input data on said thermally writable device; and projecting said image formed on said thermally writable device on said screen for forming an image substantially corresponding to said input data.

Claim 21

Independent Claim 121 words

A method for displaying a graphic image on a display screen, comprising the steps of: accepting manual input of said graphic data and converting input data into image component, each being representative of the address of an input image - component; providing a thermally writable device including a plurality of pixels, each corresponding to one of a plurality of addresses on said display screen: generating a laser beam and scanning said thermally writable device on the basis of said input data component indicative data for forming an image corresponding to the input data on said thermally writable device; and projecting said image formed on said thermally writable device on said screen for forming an image substantially corresponding to said input data.

Claim 22

Dependent Claim 27 words

A method as set forth in claim 18, which further comprises a step of providing a touch tablet overlying said display screen for accepting image input therethrough.

Claim 23

Dependent Claim 23 words

A method as set forth in claim 19, wherein image input through said touch tablet is performed by means of a tablet pen.

Claim 24

Dependent Claim 18 words

A method as set forth in claim 18, wherein said thermally writable device comprises a liquid crystal cell.

Claim 25

Dependent Claim 29 words

A method as set forth in claim 18, which further comprises a step of erasing the image formed on said thermally writable device by applying a given erasure voltage.

Claim 26

Dependent Claim 40 words

A method as set forth in claim 22, wherein said step of erasing said image on said thermally writable device is performed in a first mode for fully erasing the image and a second mode for partially erasing the image.

Claim 27

Dependent Claim 22 words

A method as set forth in claim 18, which further comprises a step of reading said input image indicative data for storage.

Claim 28

Dependent Claim 40 words

A method as set forth in claim 24, wherein said step of reading and storing said input image indicative data includes generation of a synchronizing signal and mixing said input image indicative data with said synchronizing signal for storage together.

Method and system for data display and input via display screen

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