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Light pen to use with a transparent electro-luminiscent display

IP.com Disclosure Number: IPCOM000016405D
Original Publication Date: 2002-Nov-30
Included in the Prior Art Database: 2003-Jun-21
Document File: 3 page(s) / 128K

Publishing Venue

IBM

Abstract

The present system relates to a new computer interface to use in combination with a physical document. The computer interface comprises a transparent electro-luminiscent display and a a light pen. The electro-luminiscent display illuminates or highlights over the physical document, a plurality of preselected printed items (e.g., words, pictures, logos). When the user chooses with the light pen, an highlighted item on the physical document, a specific action (e.g., selections of menu items, phone calls, hyperlink activation) associated with this chosen item is triggered on a computer system. The system is based on the observation that, for selecting one among a plurality of graphic items (e.g., words, icons, marks, menu entries, buttons) printed or engraved on a page of a physical document that are illuminated by light spots emitted by a transparent light emitting foil, it is not necessary to detect the coordinates of a point selected by the user in the vicinity of the corresponding light spot to determine what item is selected by the user. The present system uses a transparent light-emitting display (opto foil) for sequentially and cyclically illuminating the positions of preselected items and uses a light sensing device to choose an item among the sequentially and cyclically illuminated items and to detect the instant at which light is detected on the position of said chosen item. The system operates as follows :

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Light pen to use with a transparent electro-luminiscent display

The present system relates to a new computer interface to use in combination with a physical document. The computer interface comprises a transparent electro-luminiscent display and a a light pen. The electro-luminiscent display illuminates or highlights over the physical document, a plurality of preselected printed items (e.g., words, pictures, logos). When the user chooses with the light pen, an highlighted item on the physical document, a specific action (e.g., selections of menu items, phone calls, hyperlink activation) associated with this chosen item is triggered on a computer system.

The system is based on the observation that, for selecting one among a plurality of graphic items (e.g., words, icons, marks, menu entries, buttons) printed or engraved on a page of a physical document that are illuminated by light spots emitted by a transparent light emitting foil, it is not necessary to detect the coordinates of a point selected by the user in the vicinity of the corresponding light spot to determine what item is selected by the user.

The present system uses a transparent light-emitting display (opto foil) for sequentially and cyclically illuminating the positions of preselected items and uses a light sensing device to choose an item among the sequentially and cyclically illuminated items and to detect the instant at which light is detected on the position of said chosen item.

The system operates as follows :

An electro-luminiscent display (opto foil) is placed aligned over a page of a

physical document.

A plurality of preselected items are cyclically and sequentially illuminated by

the electro-luminiscent display during short intervals of time under control of

X and Y coordinates driving circuits. The coordinates (i.e., X, Y coordinates)

of illuminated items on the page are recorded in a table.

The user identifies a desired item among the plurality of items illuminated by

the transparent electro-luminiscent display.

The user chooses with a light pen the desired illuminated item. The light pen detects light pulses and determines precisely the time when these light pulses occurs

Among all illuminated items, the system identifies the item that has been

illuminated at the time when the light pulses have been detected by the

light pen. This item is therefore the one that has been chosen by the user.

Once the chosen item has been identified, the associated action is

retrieved from the table and is triggered by the computer system.

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Web servers

INTERNET NETW ORK

U ser w orkstation

Fig 3: Item s are selected by pointing w ith a light pen over

lig h t s p o ts illu m in a te d b y th e E L d is p la y

Physical docum ent Transparent

E lectro-lum iniscent

d is p la y

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