Background technology
Electric ink (E Ink) screen that E Ink company produces is a kind of employing electrophoresis showed (electrophoretic display; EPD) Electronic Paper of technology (electronic paper).Its advantage is that the display effect that is similar to paper can be provided, and is reflective screen but not traditional luminescent screen, has vision protection and is suitable for human long-time advantage of reading.Therefore the electric ink screen becomes the main flow screen of current E-book reader.
Distinguish by speed, the electric ink screen provides two kinds of refresh modes usually:
First kind is that gray scale refreshes (GU) pattern, full frame refreshing once needs 780ms at least (this numerical value is for 6 inches electric ink screens, 5 inches electric ink screens full frame refresh time under the gray scale refresh mode is shorter, 9 inches electric ink screens full frame refresh time under the gray scale refresh mode is longer), 4 grades (rank), 8 grades or 16 grades of gray scales demonstrations can be provided.
Second kind is that black and white refreshes (DU) pattern, full frame refreshing once needs 200ms at least (this numerical value is for 6 inches electric ink screens, 5 inches electric ink screens full frame refresh time under the black and white refresh mode is shorter, 9 inches electric ink screens full frame refresh time under the black and white refresh mode is longer), only provide black-and-white two color to show.
At present when the input of the enterprising style of writing word of electric ink screen, employing be gray scale refresh mode and vector fonts, can obtain gray scale display effect and reverse sawtooth characteristic preferably like this.It is the very strong application of a kind of interactivity that but E-book reader utilizes the electric ink screen to carry out literal input as show media, and existing character input method has the too low shortcoming of refresh rate, gives user's the reaction of direct feel very slow.
Summary of the invention
Technical matters to be solved by this invention provides the method for carrying out the high-speed text input on a kind of electric ink screen.
For solving the problems of the technologies described above, realize on the electric ink screen of the present invention that the method for efficient input is: when the enterprising style of writing word of electric ink screen is imported, adopt black and white refresh mode and raster font.
The present invention had both utilized the fast advantage of black and white refresh mode refresh rate, had utilized raster font good advantage of display effect under preliminary dimension again, carried out the experience that literal is imported thereby improved the user greatly.
Embodiment
The shown font of electronic equipment that comprises the electric ink screen can be divided into two big classes: vector fonts and raster font.
What vector fonts was preserved is the descriptor of the geometric configuration of each character, such as a stroke initial, stop coordinate, radius, radian or the like are played up through a series of mathematical operation according to Output Size during demonstration and are raster bitmap.The advantage of vector fonts can ad infinitum be amplified in theory, and it is slick and sly that the stroke profile still can keep.Vector fonts can use (rank) at different levels gray scale to realize reverse sawtooth (AntiAlias) effect at the edge of font stroke when showing, makes the font that renders smooth mellow and full.
Raster font is that each character is all saved as the raster bitmap that some spots (as 16 * 16 or 24 * 24) is formed, and each point only has black-and-white two color, represents the profile of Chinese character with the black and white of each point.Raster font only is suitable for showing default size, and under this pre-set dimension, owing to carried out special optimization, raster font often can obtain than the better display effect of vector fonts.The disadvantage of raster font is to amplify, in case will find the sawtooth at literal edge after amplifying.
Two kinds in conjunction with the electric ink screen are refreshed mode as can be known: vector fonts is applicable to the gray scale refresh mode, can give full play to the advantage that the gray scale refresh mode can be realized the reverse sawtooth effect, improves user's visual effect.Raster font is applicable to the black and white refresh mode, just can make full use of black and white refresh mode refresh rate faster under fixing display size, improves user experience.
Belong to a kind of application less demanding to display effect, that still refresh rate is had relatively high expectations in the enterprising style of writing word input of electric ink screen.For this reason, when the enterprising style of writing word of electric ink screen is imported, refresh rate need be improved as far as possible, user experience could be improved.The interface of literal input simultaneously is fixed measure normally, uses raster font to meet the demands like this.
Seeing also Fig. 1, realize the method for efficient input on the electric ink screen of the present invention, is when the enterprising style of writing word of electric ink screen is imported, and adopts black and white refresh mode and raster font.So both utilized the fast advantage of black and white refresh mode refresh rate, utilized raster font good advantage of display effect under preliminary dimension again, carried out the experience that literal is imported thereby improved the user greatly.
See also Fig. 2, in a specific embodiment, realize on the electric ink screen of the present invention that the method for efficient input comprises the steps:
At first, utilize on the E-book reader of electric ink screen as show media raster font is installed.
Secondly, when the user used E-book reader to carry out the literal input, the interface of literal input adopted raster font to be shown on E-book reader.
And when explicit user was imported alternate item contents such as (candidate characters) on the electric ink screen, the black and white refresh mode was adopted at the interface of literal input on E-book reader.
Usually the E-book reader interface of carrying out literal input (for example keyboard input) only occupies the part viewing area on the electric ink screen, so refresh mode and display font only are applied to this part viewing area.If the interface of certain literal input (for example handwriting input) is full screen display on the electric ink screen, then refresh mode and display font are applied to full frame.