PORTABLE ELECTRONIC DEVICE AND CHARACTER DISPLAY METHOD FOR THE SAME

• US 20080303824A1
• Filed: 05/30/2008
• Published: 12/11/2008
• Est. Priority Date: 05/30/2007
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.), Kyocera Corporation
• Original Assignee: Kyocera Corporation
• Inventors: SUZUKI, Shoji
• Granted Patent: US 8,487,936 B2
• Time in Patent Office: Days
• US Class Current: 345/467
• CPC Class Codes: G06F 40/103 Formatting, i.e. changing of presentation of documents automatic justification G06F40/189; automatic line break hyphenation G06F40/191
• CPC Class Codes: G06T 11/20 Drawing from basic elements, e.g. lines or circles
• CPC Class Codes: G09G 2320/0252 Improving the response speed
• CPC Class Codes: G09G 3/18 using liquid crystals
• CPC Class Codes: G09G 5/343 for systems having a character code-mapped display memory

Abstract

A portable electronic device including a display unit uses a still character font and a scroll character font. The display unit can scroll through one or more images on a screen. The still character font is used for characters on a still screen. The scroll character font is used for characters on a scroll screen, and has the same characters as those of the still character font, the characters of the scroll character font having at least one different visual characteristic when compared to corresponding characters of the still character font.

Claims

1. A portable electronic device comprising a display unit capable of scrolling through images on a screen,

wherein the portable electronic device uses:

a still character font used for at least one character on a still screen; and

at least one scroll character font used for at least one character on a scroll screen, the scroll character font having the same characters as the still character font, wherein the characters of the scroll character font have at least one different visual characteristic when compared to corresponding characters of the still character font.

2. The portable electronic device according to claim 1, further comprising:

an input operation unit configured to direct the scrolling through images on the screen; and

a control unit configured to control the display unit to display a character by using one of the still and scroll character fonts when the display unit displays a screen including the character,

wherein, when the input operation unit does not direct the scrolling through images on the screen, the control unit employs the still character font, and, when the input operation unit directs the scrolling through images on the screen, the control unit employs the scroll character font.

3. The portable electronic device according to claim 2, further comprising a memory storing the still character font and the at least one scroll character font.

4. The portable electronic device according to claim 2, further comprising a memory storing the still character font and the at least one scroll character font for one set of character codes,

wherein the control unit searches the memory for one of the still character font or the scroll character font, which corresponds to the character code of the character, and controls the display unit to perform character drawing by using the font searched for.

5. The portable electronic device according to claim 2, further comprising a memory storing the still character font and a predetermined table,

wherein the scroll character font is generated by processing and altering the still character font on the basis of the predetermined table.

6. The portable electronic device according to claim 1, wherein, when a character of the scroll character font is compared with a corresponding character of the still character font, a color of a first edge of the character of the scroll character font is different than a color of the corresponding character of the still character font, and a color of other parts of the character of the scroll character font are the same as the color of the character of the still character font.

7. The portable electronic device according to claim 6, wherein the color of the first edge of the character of the scroll character font has a color tone deeper than a color tone of the color of the other parts.

8. The portable electronic device according to claim 7, wherein, when the display unit displays the screen including a character, the display unit also displays a predetermined background color as a background for the character, which is to be drawn, and the color of the first edge of the character of the scroll character font is set to have a deeper color tone that is different from a color tone of the predetermined background color and a color tone of the color of the still character font.

9. The portable electronic device according to claim 6, wherein the color of a second edge of the character of scroll character font has a color tone lighter than a color tone of the colors of the other parts.

10. The portable electronic device according to claim 9, wherein, when the display unit displays a screen including a character, the display unit also displays a predetermined background color as a background for the character, which is to be drawn, the color tone of the second edge is set to be darker than a color tone of the predetermined background color and lighter than the color tone of the still character font.

11. The portable electronic device according to claim 6, wherein the first edge is a region having a width of at least one dot at a character edge.

12. The portable electronic device according to claim 6, wherein the first edge comprises a forward edge with respect to a predetermined scroll direction.

13. The portable electronic device according to claim 12,

wherein, when the display unit displays a screen including a character, the display unit also displays a predetermined background color as a background for the character, which is to be drawn,

wherein the color of the forward edge has a color tone deeper than a color tone of a corresponding character of the still character font, and a color of a rearward edge of the character has a color tone lighter than a color tone of the corresponding character of the still character font.

14. The portable electronic device according to claims 1,

wherein, when scrolling in a first scroll direction among a plurality of scroll directions, a first scroll character font among a plurality of different scroll character fonts is used, and, when scrolling in a second scroll direction among the plurality of scroll directions, a second scroll character font among the plurality of different scroll character fonts is used.

15. The portable electronic device according to claim 14,

wherein, when a character of the first scroll character font is compared with a corresponding character of the still character font, a color of at least a forward edge and a rearward edge with respect to the first scroll direction is different, and

wherein, when a character of the second scroll character font is compared with a corresponding character of the still character font, a color of a forward edge and a rearward edge with respect to the second scroll direction is different.

16. The portable electronic device according to claim 15, wherein the color tone of a character of the first scroll character font on the forward edge in the first scroll direction is identical to the color tone of a character of the second scroll character font on the forward edge in the second scroll direction.

17. The portable electronic device according to claim 15, wherein the forward and rearward edges of the characters corresponding to the first and second scroll character fonts are each one dot in width.

18. The portable electronic device according to claim 14, wherein the input operation unit is capable of directing scrolling in up, down, right and left directions on the display unit.

19. The portable electronic device according to claim 18, wherein the portable electronic device uses a different scroll character font corresponding to each scrolling direction.

20. The portable electronic device according to claim 14, wherein, if termination of scrolling is detected, use of the still character font is resumed.

21. A portable electronic device comprising:

a display unit capable of scrolling through images on a screen;

means for displaying a character of a first character font on a still screen on the display unit; and

means for displaying a character of a second character font on a scroll screen on the display unit, the character of the second character font being the same as the character of the first character font, the character of the second character font including at least a portion having a different color tone than a color tone of the character of the first character font.

22. A character display method for a portable electronic device including a display unit that displays images, and a memory, the character display method comprising the steps of:

enabling scrolling of an image displayed on the display unit, the image including a character;

determining whether or not scrolling is being performed;

acquiring character information from the memory on the basis of whether scrolling is being performed; and

using the acquired character information to display, on the display unit, as the character included in the image, a character of a still character font or a scroll character font.