Electronic apparatus and drawing method

1. An electronic apparatus comprising:

a first obtaining module configured to detect a position of a stylus on a writing surface of a sensor;

a second obtaining module configured to obtain writing pressure by the stylus;

a correction module configured to correct the writing pressure obtained by the second obtaining module; and

a drawing processor configured to draw a locus of the obtained position of the stylus on a display screen, the drawing processor having a first mode, wherein the locus has a line width based on the writing pressure corrected by the correction module in the first mode,

wherein the correction module is configured to correct the writing pressure obtained by the second obtaining module, by using a first correction quantity based on a static frictional coefficient between the stylus and the writing surface, at start of writing by the stylus, and to correct the writing pressure obtained by the second obtaining module, by using a second correction quantity based on a dynamic frictional coefficient between the stylus and the writing surface, after the start of writing.

2. The apparatus of claim 1 , further comprising:

a detector configured to detect a frictional coefficient between the writing surface and the stylus, wherein

the correction module is configured to correct the writing pressure, based on the frictional coefficient detected by the detector and the writing pressure.

3. The apparatus of claim 1 , wherein

the drawing module has a second mode, and the drawing module is configured to draw, in the second mode, a first locus which has a line width different from a selected second line width, and to draw a second locus which has the second line width, instead of the first locus, after a predetermined time has passed since the first locus was drawn.

4. A drawing method comprising:

obtaining a position of a stylus on a writing surface of a sensor;

obtaining writing pressure by the stylus;

correcting the obtained writing pressure based on a selected first line width; and

drawing a locus of the obtained position of the stylus on a display screen,

wherein the drawing comprises drawing a locus having a line width which is determined in accordance with the first line width and the writing pressure corrected by the correcting in a first mode, and

the correcting comprises correcting the writing pressure, by using a first correction quantity based on a static frictional coefficient between the stylus and the writing surface, at start of writing by the stylus, and correcting the writing pressure, by using a second correction quantity based on a dynamic frictional coefficient between the stylus and the writing surface, after the start of writing.

5. The method of claim 4 , wherein

the drawing, in a second mode, comprises drawing a first locus which has a line width different from a selected second line width, and drawing a second locus which has the second line width, instead of the first locus, after a predetermined time has passed since the first locus was drawn.

6. A computer-readable, non-transitory storage medium configured to store a computer program which is executable by a computer, the computer program controlling the computer to execute functions of:

obtaining a position of a stylus on a writing surface of a sensor;

obtaining writing pressure generated by the stylus;

correcting the obtained writing pressure; and

drawing a locus of the obtained position of the stylus on a display screen,

wherein the drawing includes drawing a locus having a line width which is determined in accordance with the first line width and the corrected writing pressure in a first mode, and

the correcting comprises correcting the writing pressure, by using a first correction quantity based on a static frictional coefficient between the stylus and the writing surface, at start of writing by the stylus, and correcting the writing pressure, by using a second correction quantity based on a dynamic frictional coefficient between the stylus and the writing surface, after the start of writing.

7. The program of claim 6 , wherein the drawing, in a second mode, comprises drawing a first locus which has a line width different from a selected second line width, and drawing a second locus which has the second line width, instead of the first locus, after a predetermined time has passed since the first locus was drawn.

8. The apparatus of claim 1 , wherein the correction module is configured to correct the writing pressure obtained by the second obtaining module based on a selected first line width.

9. An electronic apparatus comprising:

a first obtaining module configured to detect a position of a stylus on a writing surface of a sensor;

a second obtaining module configured to obtain writing pressure by the stylus;

a correction module configured to correct the writing pressure obtained by the second obtaining module; and

a drawing processor configured to draw a locus of the obtained position of the stylus on a display screen, the drawing processor having a first mode, wherein the locus has a line width based on the writing pressure corrected by the correction module in the first mode,

wherein the correction module is configured to add a third correction quantity to the obtained writing pressure, when a frictional coefficient between the writing surface and the stylus is not changed in accordance with the writing pressure and the obtained writing pressure is greater than or equal to a first reference writing pressure, and

the correction module is configured to add a fourth correction quantity to the obtained writing pressure, when the frictional coefficient between the writing surface and the stylus is changed in accordance with the writing pressure and the obtained writing pressure is less than or equal to a second reference writing pressure.

10. The apparatus of claim 9 , wherein the correction module is configured to correct the writing pressure obtained by the second obtaining module based on a selected first line width.

11. The apparatus of claim 9 , further comprising:

a detector configured to detect a frictional coefficient between the writing surface and the stylus, wherein

the correction module is configured to correct the writing pressure, based on the frictional coefficient detected by the detector and the writing pressure.

12. The apparatus of claim 9 , wherein

the drawing module has a second mode, and the drawing module is configured to draw, in the second mode, a first locus which has a line width different from a selected second line width, and to draw a second locus which has the second line width, instead of the first locus, after a predetermined time has passed since the first locus was drawn.

13. The method of claim 4 , wherein the correcting comprises correcting the writing pressure based on a selected first line width.

14. A drawing method comprising:

obtaining a position of a stylus on a writing surface of a sensor;

obtaining writing pressure by the stylus;

correcting the obtained writing pressure; and

drawing a locus of the obtained position of the stylus on a display screen,

wherein the drawing comprises drawing a locus having a line width which is determined in accordance with the first line width and the writing pressure corrected by the correcting in a first mode, and

the correcting comprises

adding a third correction quantity to the obtained writing pressure, when a frictional coefficient between the writing surface and the stylus is not changed in accordance with the writing pressure and the obtained writing pressure is greater than or equal to a first reference writing pressure, and

adding a fourth correction quantity to the obtained writing pressure, when the frictional coefficient between the writing surface and the stylus is changed in accordance with the writing pressure and the obtained writing pressure is less than or equal to a second reference writing pressure.

15. The method of claim 14 , wherein the correcting comprises correcting the writing pressure based on a selected first line width.

16. The method of claim 14 , further comprising:

the drawing, in a second mode, comprises drawing a first locus which has a line width different from a selected second line width, and drawing a second locus which has the second line width, instead of the first locus, after a predetermined time has passed since the first locus was drawn.

17. The medium of claim 6 , wherein the correcting comprises correcting the writing pressure based on a selected first line width.

18. A computer-readable, non-transitory storage medium configured to store a computer program which is executable by a computer, the computer program controlling the computer to execute functions of:

obtaining a position of a stylus on a writing surface of a sensor;

obtaining writing pressure generated by the stylus;

correcting the obtained writing pressure; and

drawing a locus of the obtained position of the stylus on a display screen,

wherein the drawing includes drawing a locus having a line width which is determined in accordance with the first line width and the corrected writing pressure in a first mode, and

the correcting comprises

adding a third correction quantity to the obtained writing pressure, when a frictional coefficient between the writing surface and the stylus is not changed in accordance with the writing pressure and the obtained writing pressure is greater than or equal to a first reference writing pressure, and

adding a fourth correction quantity to the obtained writing pressure, when the frictional coefficient between the writing surface and the stylus is changed in accordance with the writing pressure and the obtained writing pressure is less than or equal to a second reference writing pressure.

19. The medium of claim 18 , wherein the correcting comprises correcting the writing pressure based on a selected first line width.

20. The medium of claim 18 , further comprising:

the drawing, in a second mode, comprises drawing a first locus which has a line width different from a selected second line width, and drawing a second locus which has the second line width, instead of the first locus, after a predetermined time has passed since the first locus was drawn.