Method and device for displaying character on touchscreen

• US 9,588,620 B2
• Filed: 07/22/2013
• Issued: 03/07/2017
• Est. Priority Date: 08/30/2012
• Status: Active Grant

• Current Assignee: ZTE Corporation
• Original Assignee: ZTE Corporation
• Inventors: Gao, Minggang, Ni, Qingyu, Wang, Zhuo
• Primary Examiner(s): PATEL, PREMAL R
• Application Number:
  US14/422,337
• Publication Number:
  US 20150193077A1
• Time in Patent Office: 1,324 Days
• US Class Current: 1/1
• CPC Class Codes: G06F 2203/04101 2.5D-digitiser, i.e. digitiser detecting the X/Y position of the input means, finger or stylus, also when it does not touch, but is proximate to the digitiser's interaction surface and also measures the distance of the input means within a short range in the Z direction, possibly with a separate measurement setup
• CPC Class Codes: G06F 2203/04808 Several contacts: gestures triggering a specific function, e.g. scrolling, zooming, right-click, when the user establishes several contacts with the surface simultaneously; e.g. using several fingers or a combination of fingers and pen
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0418 for error correction or compensation, e.g. based on parallax, calibration or alignment
• CPC Class Codes: G06F 3/04812 Interaction techniques based on cursor appearance or behaviour, e.g. being affected by the presence of displayed objects
• CPC Class Codes: G06F 3/0482 Interaction with lists of selectable items, e.g. menus
• CPC Class Codes: G06F 3/04842 Selection of displayed objects or displayed text elements G06F3/0482 takes precedence
• CPC Class Codes: G06F 3/04883 for inputting data by handwriting, e.g. gesture or text
• CPC Class Codes: G06F 3/04886 by partitioning the display area of the touch-screen or the surface of the digitising tablet into independently controllable areas, e.g. virtual keyboards or menus

Abstract

Disclosed are a method and device for displaying a character on a touchscreen. The method comprises: when it is detected that a time period during which the user touches an area, where a character is displayed, on the touchscreen exceeds a preset time threshold, a shaded area formed when the user touches the touchscreen is determined; at least one shaded character in the shaded area is acquired, and independently displayed and enlarged on a preset enlargement area excluding the shaded area on the touchscreen; and the touch of the user on the preset enlargement area is detected, and locating and selecting is performed on the at least one character in the shaded area according to the detected touch.

Claims

1. A method for displaying a character on a touchscreen, comprising:

when it is detected that a time period during which the user touches an area, where at least one character is displayed, on the touchscreen exceeds a preset time threshold, determining a shaded area formed when the user touches the touchscreen;

acquiring at least one shaded character in the shaded area, and independently displaying and enlarging the at least one shaded character on a preset enlargement area excluding the shaded area on the touchscreen; and

detecting a touch of the user on the preset enlargement area, and performing locating and/or selecting on the at least one shaded character in the shaded area according to the detected touch;

wherein detecting the touch of the user on the preset enlargement area, and performing locating and/or selecting on the at least one shaded character in the shaded area according to the detected touch comprises;

when it is detected that the user touches the preset enlargement area, recording a starting position of the preset enlargement area touched by the user and detecting whether the user continuously performs a slide touch on the preset enlargement area;

if no, calculating a corresponding starting position of the shaded area according to the starting position of the preset enlargement area and moving a cursor to a front of a character corresponding to the starting position of the shaded area, wherein the starting position of the shaded area is in the shaded area; and

if yes, recording an ending position of the preset enlargement area touched by the user and calculating corresponding starting position of the shaded area and ending position of the shaded area, which are in the shaded area, according to the starting position of the preset enlargement area and the ending position of the preset enlargement area, and selecting corresponding characters between the starting position of the shaded area and the ending position of the shaded area.

2. The method as claimed in claim 1, wherein when it is detected that the time period during which the user touches an area, where no character is displayed, on the touchscreen exceeds the preset time threshold, or when it is detected that the time period during which the user touches the touchscreen does not exceed the preset time threshold, an operation of the user is not responded.

3. The method as claimed in claim 1, wherein determining the shaded area formed when the user touches the touchscreen comprises:

determining a radius R_r of the shaded area according to formula 1;

R_r=R_t+d_r 

 

formula 1;

where R_t is the maximum radius of an area which is actually touched and pressed by the user and is detected by the touchscreen, and d_r is a preset predicted value; and

determining the shaded area according to the radius R_r.

4. The method as claimed in claim 1, wherein a coordinate system for the whole touchscreen display area is an XOY coordinate system, a coordinate system for the preset enlargement area is an X′

O′

Y′

coordinate system, wherein a coordinate value of O′

point in the XOY coordinate system is (X₀, Y₀);

in the XOY coordinate system, a display area of the whole touchscreen display area is D1 area, the shaded area in the D1 area is D3 area, and a rectangle taking the D3 area as an inscribed circle is D2 area; and

in the X′

O′

Y′

coordinate system, the preset enlargement area is D4 area;

acquiring the at least one shaded character in the shaded area, and independently displaying and enlarging the at least one shaded character on the preset enlargement area excluding the shaded area on the touchscreen specifically comprise;

detecting the D3 area, determining the D2 area according to the D3 area, and acquiring a length a and a width b of the D2 area;

acquiring preset screen extension ratios M and N, where M=a′

/a, N=b′

/b, a′

is a length of the D4 area, and b′

is a width of the D4 area;

determining a transition relation between a point (x, y) in the D2 area in the XOY coordinate system and a point (x′

, y′

) in the D4 area in the X′

O′

Y′

coordinate system according to formula 2 and formula 3;

x′

=(x−

x₀)*M 

 

formula 2;

y′

=(y−

y₀)*N 

 

formula 3;

determining the D4 area according to the transition relation; and

acquiring the at least one shaded character in the shaded area and displaying the at least one shaded character in the D4 area, and setting a font size of the D4 area as T times of an original character size, where T=min (M, N).

5. The method as claimed in claim 4, wherein the coordinate system for the whole touchscreen display area is the XOY coordinate system, and the coordinate system for the preset enlargement area is the X′

O′

Y′

coordinate system, wherein a coordinate value of the O′

point in the XOY coordinate system is (X₀, Y₀);

in the XOY coordinate system, the display area of the whole touchscreen display area is D1 area, the shaded area in the D1 area is D3 area, and a rectangle taking the D3 area as the inscribed circle is D2 area; and

in the X′

O′

Y′

coordinate system, the preset enlargement area is D4 area;

calculating a corresponding starting position of the shaded area in the shaded area according to the starting position of the preset enlargement area and moving the cursor to the front of the character corresponding to the starting position of the shaded area comprises;

acquiring a centre coordinate (x_c′

, y_c′

) of the starting position of the D4 area touched by the user, and calculating an original coordinate (x_c, y_c), which is corresponding to the centre coordinate (x_c′

, y_c′

) and is in the shaded area, according to formula 4 and formula 5;

x_c=x_c′

/M+x₀ 

 

formula 4;

y_c=y_c′

/N+y₀ 

 

formula 5;

setting the cursor between two characters which are closest to the original coordinate (x_c, y_c);

recording the ending position of the preset enlargement area touched by the user and calculating a corresponding starting position of the shaded area and ending position of the shaded area which are in the shaded area according to the starting position of the preset enlargement area and the ending position of the preset enlargement area, and selecting the corresponding characters between the starting position of the shaded area and the ending position of the shaded area comprises;

acquiring a centre coordinate (x_c1′

, y_c1′

) of a starting position of the D4 area touched by the user, and calculating an original coordinate (x_c1, y_c1) corresponding to the centre coordinate (x_c1′

, y_c1′

) in the shaded area according to formula 6 and formula 7;

x_c1=x_c1′

/M+X₀ 

 

formula 6;

y_c1=y_c1′

/N+y₀ 

 

formula 7;

setting a starting cursor between two characters which are closest to the original coordinate (x_c1, y_c1);

after it is detected that the sliding of the user in the D4 area ends, acquiring a centre coordinate (x_c2′

, y_c2′

) of an ending position of the D4 area touched by the user, and calculating an original coordinate (x_c2, y_c2) corresponding to the centre coordinate (x_c2′

, y_c2′

) in the shaded area according to formula 8 and formula 9;

x_c2=x_c2′

/M+X₀ 

 

formula 8;

y_c2=y_c2′

/N+y₀ 

 

formula 9;

setting an ending cursor between two characters which are closest to the original coordinate (x_c2, y_c2); and

selecting characters between the starting cursor and the ending cursor in the XOY coordinate system.

6. A device for displaying a character on a touchscreen, comprising a hardware processor configured to execute program modules stored in a memory, the program modules comprising:

a detection and determination component configured to, when it is detected that a time period during which the user touches an area, where at least one character is displayed, on the touchscreen exceeds a preset time threshold, determine a shaded area formed when the user touches the touchscreen;

a displaying and enlarging component configured to acquire at least one shaded character in the shaded area, and independently display and enlarge the at least one character on a preset enlargement area excluding the shaded area on the touchscreen; and

a character processing component configured to detect a touch of the user on the preset enlargement area, and perform locating and/or selecting on the at least one character in the shaded area according to the detected touch;

wherein the character processing component comprises;

a detection and judgment component configured to, when it is detected that the user touches the preset enlargement area, record a starting position of the preset enlargement area touched by the user and detect whether the user continuously performs a slide touch on the preset enlargement area;

if no, call the character positioning component; and

if yes, call the character selection component;

the character positioning component configured to calculate a corresponding starting position of the shaded area according to the starting position of the preset enlargement area and moving a cursor to a front of a character corresponding to the starting position of the shaded area, wherein the starting position of the shaded area is in the shaded area and the character selection component configured to record an ending position of the preset enlargement area touched by the user and calculate corresponding starting position of the shaded area and ending position of the shaded area which are in the shaded area according to the starting position of the preset enlargement area and the ending position of the preset enlargement area, and select corresponding characters between the starting position of the shaded area and the ending position of the shaded area.

7. The device as claimed in claim 6, wherein the detection and determination component is configured to:

determine a radius R_r of the shaded area according to formula 1;

R_r=R_t+d_r 

 

formula 1;

where R_t is the maximum radius of an area which is actually touched and pressed by the user and is detected by the touchscreen, and d_r is a preset predicted value; and

determine the shaded area according to the radius R_r.

8. The device as claimed in claim 6, wherein a coordinate system for the whole touchscreen display area is an XOY coordinate system, a coordinate system for the preset enlargement area is an X′

O′

Y′

coordinate system, wherein a coordinate value of O′

point in the XOY coordinate system is (X₀, Y₀);

in the XOY coordinate system, a display area of the whole touchscreen display area is D1 area, the shaded area in the D1 area is D3 area, and a rectangle taking the D3 area as the inscribed circle is D2 area; and

in the X′

O′

Y′

coordinate system, the preset enlargement area is D4 area;

the displaying and enlarging component is configured to;

detect the D3 area, determine the D2 area according to the D3 area, and acquire a length a and a width b of the D2 area;

acquire preset screen extension ratios M and N, where M=a′

/a, N=b′

/b, a′

is a length of the D4 area, and b′

is a width of the D4 area;

determine a transition relation between a point (x, y) in the D2 area in the XOY coordinate system and a point (x′

, y′

) in the D4 area in the X′

O′

Y′

coordinate system according to formula 2 and formula 3;

x′

=(x−

x₀)*M 

 

formula 2;

y′

=(y−

y₀)*N 

 

formula 3;

determine the D4 area according to the transition relation; and

acquire the at least one shaded character in the shaded area and displaying the at least one shaded character in the D4 area, and set a font size of the D4 area as T times of an original character size, where T=min (M, N);

the character positioning component is configured to;

acquire a centre coordinate (x_c′

, y_c′

) of the starting position of the D4 area touched by the user, and calculate an original coordinate (x_c, y_c), which is corresponding to the centre coordinate (x_c′

, y_c′

) and is in the shaded area, according to formula 4 and formula 5;

x_c=x_c′

/M+x₀ 

 

formula 4;

y_c=y_c′

/N+y₀ 

 

formula 5;

set the cursor between two characters which are closest to the original coordinate (x_c, y_c); and

the character selection component is configured to;

acquire a centre coordinate (x_c1′

, y_c1′

) of the starting position of the D4 area touched by the user, and calculate an original coordinate (x_c1, y_c1), which is corresponding to the centre coordinate (x_c1′

, y_c1′

) and is in the shaded area, according to formula 6 and formula 7;

x_c1=x_c1′

/M+X₀ 

 

formula 6;

y_c1=y_c1′

/N+y₀ 

 

formula 7;

set a starting cursor between two characters which are closest to the original coordinate (x_c1, y_c1);

after it is detected that the sliding of the user in the D4 area ends, acquire a centre coordinate (x_c2′

, y_c2′

) of an ending position of the D4 area touched by the user, and calculate an original coordinate (x_c2, y_c2) corresponding to the centre coordinate (x_c2′

, y_c2′

) in the shaded area according to formula 8 and formula 9;

x_c2=x_c2′

/M+X₀ 

 

formula 8;

y_c2=y_c2′

/N+y₀ 

 

formula 9;

set an ending cursor between two characters which are closest to the original coordinate (x_c2, y_c2); and

select characters between the starting cursor and the ending cursor in the XOY coordinate system.