Device for inputting characters by handwriting

• US 5,864,636 A
• Filed: 12/27/1995
• Issued: 01/26/1999
• Est. Priority Date: 12/27/1994
• Status: Expired due to Term

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Chisaka, Masanobu
• Primary Examiner(s): CHANG, JON CARLTON
• Application Number:
  US08/579,155
• Time in Patent Office: 1,126 Days
• Field of Search: 382/189, 382/187, 382/188, 382/185, 382/201, 382/309, 382/310, 382/311, 382/315, 382/199, 382/123, 345/179, 345/162
• US Class Current: 382/189
• CPC Class Codes: G06F 3/04883 for inputting data by handwriting, e.g. gesture or text
• CPC Class Codes: G06V 30/347 Sampling; Contour coding; Stroke extraction

Abstract

A character input frame is displayed in a popping-up manner and erased automatically in a position in which an operator desires to effect a handwriting input. A character input frame information generating section generates character input frame information based on coordinate input position information from a coordinate input section, and stores the information in a first storage section. A character recognizing section recognizes a character extracted by a character extracting section, and stores character code data of the result of recognition into a second storage section. A display control section displays in a popping-up manner the character input frame from an initial input position on a display panel based on the character input frame information from the first storage section. The character input frame information generating section erases storage contents of the first storage section based on recognition completion information from the character recognizing section. The character input frame is automatically erased when the character recognition is completed. During operation, the character input frame is composed of a mere frame where its cells are internally transparent, so that a printing type is not hidden behind the frame.

Claims

1. A device for inputting characters by handwriting in which trace coordinate data of a character is extracted by a character extracting section from trace coordinate data from an input section laminated on a display panel, the extracted character being recognized by a character recognizing section to thereby display on the display panel a trace of a handwriting input based on the trace coordinate data and the recognized character by a display control section, comprising:

a character input frame information generating section which generates character input frame information for displaying a character input frame representing a handwriting input area in accordance with an initial input position on the display panel where the trace of the handwriting has been inputted and stores the information into a first storage section,

the display control section displaying on the display panel the trace of the handwriting input and the recognized character as well as the character input frame with the initial input position displayed within the character input frame on the display panel used as a reference position based on the character input frame information stored in said first storage section.

3. The device for inputting characters by handwriting as claimed in claim 1, wherein the character input frame information generated by said character input frame information generating section comprises a character input frame display position that is the initial input position on the display panel, a number of cells constituting the character input frame and dimensions of the cells,

said display control section displaying on the display panel the character input frame comprising a series of cells continued in a direction based on the character input frame information with a cell that has said dimensions and encloses the reference position on the display panel used as a foremost cell.

5. The device for inputting characters by handwriting as claimed in claim 3, wherein said character input frame information generating section comprising cell number calculating means for calculating a distance from the reference position to an end of a display area in said direction on the display panel based on the character input frame display position and calculating the number of cells based on the distance and the dimensions of the cells.

7. The device for inputting characters by handwriting as claimed in claim 1, wherein the character recognizing section transmits recognition completion information representing completion of the character recognition to said character input frame information generating section when character recognition is completed,

said character input frame information generating section erasing storage contents of said first storage section upon receiving the recognition completion information from the character recognizing section and erasing the character input frame displayed on the display panel.

9. The device for inputting characters by handwriting as claimed in claim 1, wherein said character input frame information generating section comprises handwriting input stop time counting means for counting a time elapsed from stoppage of the handwriting input based on the trace coordinate data from the input section,

said character input frame information generating section erasing storage contents of said first storage section when the handwriting input stop time reaches a specified time and erasing the character input frame displayed on the display panel.

11. The device for inputting characters by handwriting as claimed in claim 1, further comprising:

a second storage section which stores character code data of the character recognized by the character recognizing section,

the display control section displaying the trace of the handwriting input based on the trace coordinate data from the input section, displaying the character input frame based on the character input frame information written in said first storage section, and displaying a printing type of the recognized character based on the character code data stored in said second storage section.

13. The device for inputting characters by handwriting as claimed in claim 1, wherein the display control section is constructed so that the character input frame is displayed only by line segments that form a frame of the character input frame based on the character input frame information.

15. The device for inputting characters by handwriting as claimed in claim 1, further comprising:

a handwriting input validity deciding section which sets a valid area for validating the handwriting input around the character input frame based on the character input frame information generated by said character input frame information generating section, decides that the trace coordinate data is valid when a foremost trace coordinate data of a series of trace coordinate data from the input section exists in the character input frame or the valid area, decides that the trace coordinate data is invalid when the foremost trace coordinate data does not exist in the character input frame or the valid area, and transmits valid/invalid information representing a result of the decision to the character extracting section,

the character extracting section extracting only the trace coordinate data of the character constituted by the trace coordinate data that is decided to be valid based on the valid/invalid information from said handwriting input validity deciding section.

17. The device for inputting characters by handwriting as claimed in claim 1, further comprising:

a handwriting input validity deciding section which sets a valid area for validating the handwriting input around the character input frame based on the character input frame information generated by said character input frame information generating section, decides that the trace coordinate data is valid when whole data of a series of trace coordinate data from the input section exists in the character input frame or the valid area, decides that the trace coordinate data is invalid when a portion of the trace coordinate data exists in neither the character input frame nor the valid area, and transmits valid/invalid information representing a result of the decision to the character extracting section,

the character extracting section extracting only the trace coordinate data of the character constituted by the trace coordinate data that is decided to be valid based on the valid/invalid information from said handwriting input validity deciding section.

19. The device for inputting characters by handwriting as claimed in claim 1, further comprising:

a character input frame renewing section which sets an area of the character input frame based on the character input frame information generated by said character input frame information generating section, and upon detecting that the trace coordinate data from the input section jumps from said area to outside of said area, transmits character input frame renewal information for designating renewal of a currently displayed character input frame to said character input frame information generating section,

said character input frame information generating section generating character input frame information based on the trace coordinate data inputted to the outside of said area from the input section and renewing contents of said first storage section upon receiving the character input frame renewal information before it receives recognition completion information from the character recognizing section.

21. The device for inputting characters by handwriting as claimed in claim 1, further comprising:

a character input frame size designating section for designating a size of the character input frame; and

a dimension information storing section for storing therein dimension information of the character input frame corresponding to the size of the character input frame,

said character input frame information generating section reading from said dimension information storing section the dimension information of the character input frame corresponding to the size of the character input frame designated by said character input frame size designating section and writing the dimension information and the character input frame information into said first storage section, the display control section displaying on the display panel the character input frame corresponding in size to the dimension information based on the character input frame information and the dimension information written in said first storage section.

2. A device for inputting characters by handwriting in which trace coordinate data of a character is extracted by a character extracting section from trace coordinate data from an input section laminated on a display panel, a height of a trace of the extracted character being normalized by a trace coordinate data normalizing section to thereby display on the display panel a trace of a handwriting input based on the trace coordinate data and the normalized trace by a display control section, comprising:

a character input frame information generating section which generates character input frame information for displaying a character input frame representing a handwriting input area in accordance with an initial input position on the display panel where the trace of the handwriting has been inputted and stores the information into a first storage section,

the display control section displaying on the display panel the trace of the handwriting input and the normalized trace as well as the character input frame with the initial input position displayed within the character input frame on the display panel used as a reference position based on the character input frame information stored in said first storage section.

4. The device for inputting characters by handwriting as claimed in claim 2, wherein the character input frame information generated by said character input frame information generating section comprises a character input frame display position that is the initial input position on the display panel, a number of cells constituting the character input frame and dimensions of the cells,

the display control section displaying on the display panel the character input frame comprising a series of cells continued in a direction based on the character input frame information with a cell that has said dimensions and encloses the reference position on the display panel used as a foremost cell.

6. The device for inputting characters by handwriting as claimed in claim 4, wherein said character input frame information generating section comprises cell number calculating means for calculating a distance from the reference position to an end of a display area in said direction on the display panel based on the character input frame display position and calculating the number of cells based on the distance and the dimensions of the cells.

8. The device for inputting characters by handwriting as claimed in claim 2, wherein the trace coordinate data normalizing section transmits normalization completion information representing completion of the normalization to said character input frame information generating section when normalization is completed,

said character input frame information generating section erasing storage contents of said first storage section upon receiving the normalization completion information from the trace coordinate data normalizing section and erasing the character input frame displayed on the display panel.

10. The device for inputting characters by handwriting as claimed in claim 2, wherein said character input frame information generating section comprises handwriting input stop time counting means for counting a time elapsed from stoppage of the handwriting input based on the trace coordinate data from the input section,

said character input frame information generating section erasing storage contents of said first storage section when the handwriting input stop time reaches a specified time and erasing the character input frame displayed on the display panel.

12. The device for inputting characters by handwriting as claimed in claim 2, further comprising:

a second storage section which stores trace coordinate data normalized by the trace coordinate data normalizing section,

the display control section displaying the trace of the handwriting input based on the trace coordinate data from the input section, displaying the character input frame based on the character input frame information written in said first storage section, and displaying a normalized trace based on the normalized trace coordinate data stored in said second storage section.

14. The device for inputting characters by handwriting as claimed in claim 2, wherein the display control section is constructed so that the character input frame is displayed only by line segments that form a frame of the character input frame based on the character input frame information.

16. The device for inputting characters by handwriting as claimed in claim 2, further comprising:

a handwriting input validity deciding section which sets a valid area for validating the handwriting input around the character input frame based on the character input frame information generated by said character input frame information generating section, decides that the trace coordinate data is valid when a foremost trace coordinate data of a series of trace coordinate data from the input section exists in the character input frame or the valid area, decides that the trace coordinate data is invalid when the foremost trace coordinate data does not exist in the character input frame or the valid area, and transmits valid/invalid information representing a result of decision to the character extracting section,

the character extracting section extracting only the trace coordinate data of the character constituted by the trace coordinate data that is decided to be valid based on the valid/invalid information from said handwriting input validity deciding section.

18. The device for inputting characters by handwriting as claimed in claim 2, further comprising:

a handwriting input validity deciding section which sets a valid area for validating the handwriting input around the character input frame based on the character input frame information generated by said character input frame information generating section, decides that the trace coordinate data is valid when whole data of a series of trace coordinate data from the input section exists in the character input frame or the valid area, decides that the trace coordinate data is invalid when a portion of the trace coordinate data exists in neither the character input frame nor the valid area, and transmits valid/invalid information representing a result of the decision to the character extracting section,

the character extracting section extracting only the trace coordinate data of the character constituted by the trace coordinate data that is decided to be valid based on the valid/invalid information from said handwriting input validity deciding section.

20. The device for inputting characters by handwriting as claimed in claim 2, further comprising:

a character input frame renewing section which sets an area of the character input frame based on the character input frame information generated by said character input frame information generating section, and upon detecting that the trace coordinate data from the input section jumps from said area to outside of said area, transmits character input frame renewal information for designating renewal of a currently displayed character input frame to said character input frame information generating section,

said character input frame information generating section generating character input frame information based on the trace coordinate data inputted to the outside of said area from the input section and renewing contents of said first storage section upon receiving the character input frame renewal information before it receives normalization completion information from the trace coordinate data normalizing section.

22. The device for inputting characters by handwriting as claimed in claim 2, further comprising:

a character input frame size designating section for designating a size of the character input frame; and

a dimension information storing section for storing therein dimension information of the character input frame corresponding to the size of the character input frame,

said character input frame information generating section reading from said dimension information storing section the dimension information of the character input frame corresponding to the size of the character input frame designated by said character input frame size designating section and writing the dimension information and the character input frame information into said first storage section,

the display control section displaying on the display panel the character input frame corresponding in size to the dimension information based on the character input frame information and the dimension information written in said first storage section.

23. A display apparatus comprising:

a display having a display area for displaying images and an input section on which handwritten characters are input thereon, said input section being on said display area;

generation means for generating character input frame information representing a character input frame in which the handwritten characters are to be input on said display, the character input frame being generated based on trace coordinate data of a handwritten character; and

display control means for controlling said display in accordance with the character input frame information to display the character input frame, the handwritten character being displayed within a first frame of the character input frame.

24. The display apparatus of claim 23, wherein the character input frame information comprises an initial input position of a trace of the handwritten character on said display, a number of frames of the character input frame and dimensions of the frames.

25. The display apparatus of claim 24, wherein said generation means determines a distance from the initial input position of the trace of the handwritten character to an end of said display area and determines the number of frames and the dimensions of the frames based on the determined distance.

26. The display apparatus of claim 23, wherein the character input frame comprises only displayed lines so that images displayed in said display area are not obscured.

27. The display apparatus of claim 23, further comprising validation means for determining that handwritten characters input subsequent display of the character input frame are valid if the trace coordinate data of the handwritten characters are input within a predetermined valid area around a corresponding frame or within the corresponding frame.

28. The display apparatus of claim 23, wherein said generation means sets an area around the character input frame and upon determination that trace coordinate data of a handwritten character input subsequent display of the character input frame jumps from said area to outside of said area, generates new character input frame information representing a new character input frame,

the subsequent handwritten character being displayed within a first frame of the new character input frame.

29. The display apparatus of claim 23, further comprising frame size designating means for designating a size of the frames of the character input frame, said generation means generating the character input frame information in further view of the designated size.

30. The display apparatus of claim 23, further comprising character recognizing means for recognizing the identity of the handwritten character based on the trace coordinate data,

said display control means controlling said display to also display a recognized version of the handwritten character.

31. The display apparatus of claim 23, further comprising trace normalizing means for normalizing a height of the handwritten character based on the trace coordinate data,

said display control means controlling said display to also display the normalized handwritten character.

32. A method of displaying handwritten characters on a display having a display area for displaying images and an input section on which the handwritten characters are input thereon, comprising the steps of:

a) inputting a handwritten character on the input section;

b) generating character input frame information representing a character input frame in which the handwritten characters are to be input on the display, the character input frame information being generated in accordance with trace coordinate data of the handwritten character input in said step a); and

c) displaying the character input frame in accordance with the character input frame information generated in said step b), the handwritten character being displayed within a first frame of the character input frame.