Vector display apparatus

• US 4,955,063 A
• Filed: 03/30/1989
• Issued: 09/04/1990
• Est. Priority Date: 04/14/1987
• Status: Expired due to Fees

• Current Assignee: Nippon Sheet Glass Company Limited
• Original Assignee: Nippon Sheet Glass Company Limited
• Inventors: Pierce, Gerald A.
• Primary Examiner(s): Boudreau, Leo H.
• Application Number:
  US07/332,420
• Time in Patent Office: 523 Days
• Field of Search: 382/14, 382/18, 382/32, 382/25, 382/65, 382/42, 382/51, 340/705, 340/715, 340/753, 340/754
• US Class Current: 382/168
• CPC Class Codes: G06V 10/507 Summing image-intensity values; Histogram projection analysis

Abstract

A vector display apparatus includes a display panel as a display screen for a vector subjected to discrimination. The display panel comprises display elements arranged in a matrix form. The display elements at positions corresponding to an input vector signal are selectively turned on to display an optical pattern corresponding to magnitudes of the vector components without displaying numerical values.

Claims

1. A vector display apparatus for displaying vectors as an optical pattern used in an image recognition system, each of said vectors having components which represent an intensity distribution of the projection obtained by projecting an image to be recognized onto an imaginary axis, said apparatus comprising:

a two-dimensional display panel including light-emitting elements arranged in a matrix form;

driving means for driving said light-emitting elements to turn on ones of said light-emitting elements located at positions corresponding to the magnitudes of the components of each of said vectors with an area assigned to the vector in said display panel.

2. An apparatus according to claim 1, wherein each of said light-emitting elements has a spot form.

3. An apparatus according to claim 1, wherein each of said light-emitting elements has a line form.

4. An apparatus according to claim 1, wherein each of said light-emitting elements comprises a light-emitting diode.

5. A vector display apparatus for displaying vectors as an optical pattern used in an image recognition system, each of said vectors having components which represent an intensity distribution of a projection obtained by projecting an image to be recognized onto an imaginary axis, said apparatus comprising:

a two-dimensional display panel wherein column electrodes and row electrodes are formed in a matrix form and light-emitting elements are arranged at intersections of said column electrodes and row electrodes;

a synchronizing signal separator which extracts a horizontal synchronizing signal and a vertical synchronizing signal from an input vector signal representing the vectors;

a column counter which receives said input vector signal and said horizontal synchronizing signal and supplied said input vector signal sequentially to said column electrodes until being reset by said horizontal synchronizing signal; and

a row counter which receives said horizontal synchronizing signal and said vertical synchronizing signal and selects said row electrodes sequentially in synchronization with said horizontal synchronizing signal until being reset by said vertical synchronizing signal; and

wherein

ones of said light-emitting elements at intersections of said column electrodes to which said input vector signal is supplied by said column counter and said row electrodes which are selected by said row counter are turned on.

6. An apparatus according to claim 5, wherein only said light-emitting elements located in correspondence of peaks of the intensities of the components are turned on in spot.

7. An apparatus according to claim 5, wherein all said light-emitting elements up to a peak of the intensity of each component are turned on in line.