CN114816085A - Electronic device with touchpad with variable operating area - Google Patents

Abstract

The invention relates to an electronic device, which comprises a display panel, a base pivoted on the display panel and a touch pad, wherein the touch pad can enter a first mode when a touch pen is judged to be close to or contacted with the touch pad, a touch pen operation area is defined on the touch pad, the length-width ratio of the touch pen operation area is equal to the length-width ratio of the display panel, and in the first mode, the operation of the touch pen in the touch pen operation area generates an instruction or handwriting in a corresponding position of the display panel; the touch pad can also enter a second mode after a trigger event, a writing area is displayed on the display panel under the second mode, and handwriting written on the touch pad by a user is presented in the writing area of the display panel in relative coordinates.

Description

Electronic device with touchpad with variable operating area

technical field

The present invention relates to an electronic device, especially an electronic device with a touch panel.

Background technique

Traditional electronic devices use keyboards or mice as input devices for control commands. With the evolution of technology, touchpads have also joined the ranks of input devices. Almost all notebook computers today are equipped with touchpads. , when the functions provided by the notebook computer become more and more complex, the touchpad in the prior art is no longer sufficient in size or function. The need for further technological upgrades.

SUMMARY OF THE INVENTION

In view of this, the present invention is aimed at improving the electronic device of the prior art, so as to be equipped with a touch panel that is more suitable for practical use.

In order to achieve the above-mentioned purpose of the invention, the technical means adopted in the present invention is to provide an electronic device, which includes:

a display panel;

a base pivotally connected to the display panel;

a touchpad disposed on the base, and the length of the touchpad is greater than half of the length of the display panel;

Wherein, when it is determined that a stylus is approaching or touching the touchpad, the touchpad enters a first mode. In the first mode, a stylus operation area is defined on the touchpad, and the touch The ratio of the length to the width of the pen operation area is equal to the ratio of the length to the width of the display panel, wherein the operation performed by the stylus in the stylus operation area generates commands or handwriting in the corresponding position of the display panel .

Therefore, the present invention provides a larger touch panel so that the user can have more input space, but at the same time, in order to correspond to the proportion of the display panel, the touch panel is defined and displayed in the preset first mode. The touch pen operation area of the same proportion of the panel enables the user to control the relative position on the touch panel corresponding to the display panel more intuitively in the first mode, thereby increasing the convenience of use.

Further, the present invention provides an electronic device comprising:

a display panel;

a base pivotally connected to the display panel;

a touchpad disposed on the base;

The touchpad enters a writing mode after a trigger event. In the writing mode, a writing area is displayed on the display panel. When an object touches the touchpad, the object moves on the touchpad. The track is formed into writing handwriting and displayed in the writing area of the display panel.

Therefore, when the touchpad provided by the present invention enters the writing mode, a writing area corresponding to the size ratio of the touchpad is displayed on the display panel, and the user can use the entire touchpad to write on the touchpad. Writing, in order to be close to the general writing habits and increase the convenience of use.

The present invention is described in detail below with reference to the accompanying drawings and specific embodiments, but is not intended to limit the present invention.

Description of drawings

Fig. 1 is the perspective view of the present invention;

Fig. 2A is the operation schematic diagram of the present invention;

FIG. 2B and FIG. 2C are diagrams of sensing quantities and positions of different objects;

3A and 3B are perspective views of the first mode of operation of the present invention;

4 and 5 are perspective views of the first mode of operation of the present invention;

6 to 7 are perspective views of the second mode of operation of the present invention;

8 to 10 are schematic diagrams of pictures presented by the display panel in the second mode of the present invention;

11 to 16 are perspective views of the second mode of operation of the present invention.

Among them, reference numerals:

10: Display panel

11, 11A, 11B, 11C: Writing area

111, 111A: Lines

111B: Indicator

20: Pedestal

21: Keyboard

30: Trackpad

31: Stylus operation area

31C: Writing operation area

32: Preset Pattern

40: Stylus

50: Fingers

Detailed ways

Below in conjunction with accompanying drawing, structure principle and working principle of the present invention are described in detail:

The technical means adopted by the present invention to achieve the intended purpose of the present invention are further described below in conjunction with the drawings and the embodiments of the present invention, wherein the drawings are simplified for the purpose of illustration only, and describe the relationship between the elements and components of the present invention. to illustrate the structure or method invention of the present invention, therefore, the elements shown in the figures are not presented in the actual number, actual shape, actual size and actual scale, and the size or size ratio has been exaggerated or simplified to provide a better description. , has been selectively designed and configured actual quantity, actual shape or actual size ratio, while the detailed component layout may be more complex.

Please refer to FIG. 1 , the electronic device of the present invention includes a display panel 10 , a base 20 , and a touch panel 30 . The base 20 is pivotally connected to the display panel 10 , the touch panel 30 is disposed on the base 20 , and the touch panel 30 has a plurality of electrode units arranged vertically and horizontally for sensing approaching or touching the touch The signal of the object of the board 30 changes. As shown in FIG. 1 , the length of the display panel 10 is L ₁ and the width is W ₁ , and the length of the touch panel 30 is L ₂ and the width is W ₂ . In one embodiment, the length of the touch panel 30 is L ₁ is greater than half of the length L ₂ of the display panel 10 ; in one embodiment, the length L ₁ of the touch panel 30 is equal to the length L ₂ of the display panel 10 .

When an object approaches or contacts the touchpad 30, the touchpad 30 determines the type of the object through the signal change generated by the electrode unit when the object approaches or contacts. The following are various types of judging objects. method, but not limited thereto.

In one embodiment, the type of the object can be determined by the slope of the sensing amount generated by the object approaching or contacting the touchpad 30 . Referring to FIGS. 2A to 2C , when the first object O ₁ and the second object O ₂ approach or contact the touch pad 30 , the corresponding sensing of the first object O ₁ on the touch pad 30 range, wherein the position with the largest sensing amount C ₁₁ is P ₁₁ , the sensing amount of the position P ₁₂ of the adjacent electrode unit is C ₁₂ , and the sensing range corresponding to the second object O ₂ on the touch panel 30 , where the position with the largest inductive amount C ₂₁ is P ₂₁ , and the inductive amount of the position P ₂₂ of the adjacent electrode unit is C ₂₂ , then the slope of the adjacent inductive position of the first object O ₁ is calculated as M ₁ =ΔC ₁ /ΔP ₁ , the calculated slope of the adjacent sensing position of the second object O ₂ is M ₂ =ΔC ₂ /ΔP ₂ , it can be clearly seen from FIG. 2B and FIG. 2C that M ₁ >M ₂ , that is, the first The change of the slope of the sensing amount of the object O ₁ in the adjacent electrode unit is larger than that of the second object O ₂ . Since the change of the inclination angle of the pen tip of the stylus is often larger than the change of the inclination angle of the fingertip, the larger slope can be determined as For a stylus, the smaller slope can be judged as a finger. In one embodiment, a slope threshold is set. When the slope of the corresponding position of the adjacent position sensing amount is greater than the slope threshold, the object is determined to be a stylus, and the object is determined to be a finger if it is smaller.

In one embodiment, the object type can be determined by the sensing area. When the object approaches or touches the touch panel 30, the fewer adjacent electrode units that sense the capacitance change, the smaller the sensing area; when the more adjacent electrode units that sense the capacitance change, the larger the sensing area big. Since the tip area of the stylus is usually smaller than the area of the fingertip, it can be determined that the stylus with the smaller sensing area is the stylus, and the larger sensing area is the finger. In one embodiment, a sensing area threshold is set, and when the sensing area is smaller than the threshold, the object is determined to be a stylus, and if the sensing area is greater than the threshold, it is determined to be a finger.

In one embodiment, the type of the object can be determined by the degree of difference in the sensing values of the electrode units. When an object approaches or touches the touchpad 30, corresponding to the position of the object, the electrode unit will generate a maximum sensing value and a plurality of surrounding sensing values at its adjacent sensing positions, and calculate the maximum sensing value and the surrounding sensing values. The difference degree of the sensed values, if the difference degree is greater than a preset value, the object is determined to be a stylus, and if it is less than a preset value, the object is determined to be a finger. The degree of difference can be represented by a difference or a ratio. For example, when the difference between the maximum sensing value and the surrounding sensing value is greater than a preset value, the object is determined to be a stylus, and if the difference is smaller than the preset value, it is determined to be a finger; If the ratio of the maximum sensing value to the surrounding sensing value is greater than the preset value, it is determined that the object is a stylus, and if the ratio is smaller than the preset value, it is determined that the object is a finger.

In one embodiment, the object type can be determined by the sum of the sensing values of the electrode units. When an object approaches or touches the touchpad 30, corresponding to the position of the object, the electrode unit will generate a maximum sensing value and a plurality of surrounding sensing values at its adjacent sensing positions, and calculate the maximum sensing value and the surrounding sensing values. The sum of the sensing values, if the sum is greater than a preset value, the object is determined to be a finger, and if it is less than a preset value, the object is determined to be a stylus.

In one embodiment, it can be determined by the signal emitted by the object. For example, an active stylus will transmit signals to the touchpad 30, but fingers will not actively generate signals, so if the touchpad 30 receives a signal from an object, it is determined that the object is a stylus.

Referring to FIG. 3A , when the touchpad 30 determines that the object is a stylus 40 , the touchpad 30 enters a first mode. In the first mode, a touchpad 30 defines a The stylus operating area 31 has a ratio of the length to the width of the stylus operating area 31 equal to the ratio of the length to the width of the display panel 10 . As shown in FIG. 3A , the length of the touch pen operating area 31 is L ₃ , and the width is W ₃ which is the same as that of the touch pad 30 , then L ₁ /W ₁ =L ₃ /W ₃ , the touch pen operating area is The width W ₃ of the touch panel 31 is smaller than or equal to the width W ₂ of the touch panel 30 . At this time, the operations performed by the stylus 40 in the stylus operation area 31 generate instructions or handwriting in the corresponding position of the display panel 10, and the operations performed outside the stylus operation area 31, A specific preset function will be enabled under a specific track, or it can also be ignored or treated as an invalid command. In one embodiment, an operation performed by the stylus 40 outside the stylus operating area 31 , such as double-clicking or moving a preset track (eg, a circular or triangular track), opens a toolbar and a command bar or a specific application.

In one embodiment, the operations performed by the stylus 40 in the stylus operation area 31 correspond to the display panel 10 in absolute coordinates, for example, the stylus 40 clicks or double-clicks the The upper left corner of the stylus operating area 31 corresponds to controlling the computer image displayed on the upper left corner of the display panel 10 ; for another example, as shown in FIG. 3A , the coordinates of the stylus 40 in the stylus operating area 31 is (X ₁₁ , Y ₁₁ ), the coordinates (X ₂₁ , Y ₂₁ ) of the object I ₁ manipulated by the touch pen 40 on the display panel 10 are calculated according to the following formulas corresponding to the touch pen operation area 31 to the absolute coordinates on the display panel 10 .

X ₂₁ =(L ₁ /L ₃ )*X ₁₁ , Y ₂₁ =(W ₁ /W ₃ )*Y ₁₁

In one embodiment, the operations performed by the stylus 40 in the stylus operation area 31 will correspond to the display panel 10 in the form of relative coordinates, for example, the stylus 40 and the stylus If the operation area 31 moves horizontally from left to right, a line corresponding to the moving distance of the stylus 40 will be drawn on the display panel 10, or the corresponding image on the display panel 10 will be dragged corresponding to the moving distance of the stylus 40. The moving distance of the stylus 40; for another example, as shown in FIG. 3B , the stylus 40 moves from the coordinates (X ₁₁ , Y ₁₁ ) to the coordinates (X ₁₂ , Y ₁₂ ) in the stylus operation area 31 , The display panel 10 defines a virtual control frame. The size of the control frame is equal to the size of the stylus operating area 31 or is proportionally scaled. The length of the control frame is L ₁₁ , the width is W ₁₁ , and L ₁₁ / W ₁₁ =L ₃ /W ₃ , the movement of the object I ₁ manipulated by the touch pen 40 on the display panel 10 is calculated according to the following formula from the touch pen operating area 31 to the display panel 10 relative coordinates.

X ₂₁ =(L ₁₁ /L ₃ )*X ₁₁ , Y ₂₁ =(W ₁₁ /W ₃ )*Y ₁₁

X ₂₂ =(L ₁₁ /L ₃ )*X ₁₂ , Y ₂₂ =(W ₁₁ /W ₃ )*Y ₁₂

The position of the touch pen operation area 31 on the touch panel 30 can be defined in different ways. In one embodiment (as shown in FIG. 3 ), no matter where the area initially sensed by the stylus 40 is located on the touchpad 30 , the stylus operating area 31 is pre-defined on the touchpad 30 . the center of the control panel 30 . In one embodiment (as shown in FIG. 4 ), the stylus operating area 31 is defined around the area where the stylus 40 is initially sensed, for example, when the stylus 40 initially touches the touch The position of the board 30 as the center defines the stylus operation area 31 .

Please refer to FIG. 5 , the position of the stylus operating area 31 on the touch panel 30 can be moved to a proper operating position by dragging or other gestures with the finger 50 .

Further, when the user writes on the touch panel 30, he often wishes to correspond to a specific writing area to determine the area on the display panel 10 corresponding to the writing or drawing, and he wishes to fully utilize the touch control. 6, the touchpad 30 enters a second mode after a trigger event. In the second mode, a writing area 11 is displayed on the display panel 10, the The ratio of the length to the width of the writing area 11 is equal to the ratio of the length to the width of the touch panel 30 . As shown in FIG. 6 , the length of the writing area 11 is L ₄ and the width is W ₄ , the length of the touch panel 30 is L ₂ and the width is W ₂ , then L ₄ /W ₄ =L ₂ /W ₂ . Please refer to FIG. 7 , in the second mode, when the object (as shown in the figure, the stylus 40 ) contacts the touchpad 30 and moves thereon, the movement of the stylus 40 will be The handwriting is generated according to the relative coordinates of the trajectory and displayed in the writing area 11 . In one embodiment, after entering the second mode, the first mode will no longer be entered because the stylus is detected.

The trigger event can be in various forms, which are exemplified below but not limited thereto. In one embodiment, the trigger event may be clicking on a physical button, and the physical button may be any button or combination of buttons on the keyboard 21 or a physical button preset on or around the touchpad 30 . In one embodiment, the trigger event may be clicking on a preset position of the touchpad 30 , such as clicking on a corner of the touchpad 30 or other preset positions. In one embodiment, the trigger event may be clicking on a preset pattern 32 on the touchpad 30 . In one embodiment, the trigger event may be to start a specific application.

In a specific application environment, the application will display a preset input box 12 on the display panel 10, and if in the second mode, the preset displayed input box 12 will block the input box 12. The writing area 11 prevents the user from observing the position of the writing area 11 . In view of this, in an embodiment of the present invention, an indicator is displayed on the display panel 10 to indicate the boundary of the writing area 11 , so that the user can confirm whether the position of the writing area 11 overlaps with the input box 12 . Please refer to FIG. 8 , in one embodiment, the indicator marks are a plurality of lines 111 , and the lines 111 can be presented as solid lines or dashed lines and extend outward from at least two sides of the writing area 11 . extends to the periphery of the display panel 10 . Referring to FIG. 9 , in one embodiment, the indicator marks are a plurality of lines 111A, and the lines 111A extend outwards by a predetermined distance from the four sides of the writing area 11A. Referring to FIG. 10 , in one embodiment, the indicator marks are a plurality of indicator symbols 111B, and the indicator symbols 111B mark at least two sides of the writing area 11B or mark the corner endpoints thereof.

In one embodiment, the size of the writing area 11 can be adjusted according to the user's writing requirements. Please refer to FIG. 11 and FIG. 12 , the user can move the two fingers 50 on the touch panel 30 to reduce the distance between the two fingers (zoom-in) or increase the distance between the two fingers (zoom-out). gestures to make the writing area 11 proportionally reduce or enlarge the size displayed on the display panel 10 .

Referring to FIG. 13 , in one embodiment, the touch panel 30 enters the second mode after a trigger event, and in the second mode, the writing operation area corresponding to the display panel 10 is generated The size of 31C will be based on system settings or application settings, and after the writing operation area 31C is generated, the touchpad 30 defines a writing operation area 31C with an aspect ratio corresponding to the writing area 11C. For example, as shown in FIG. 13 , the length of the writing area 11C corresponding to the display panel 10 is L ₅ and the width is W ₅ , and the length of the writing operation area 31C defined by the touch panel 30 is is L ₆ and the width is W ₆ , wherein the ratio of the length to the width of the writing operation area 31C is equal to the ratio of the length to the width of the writing area 11C, so L ₅ /W ₅ =L ₆ /W ₆ . In one embodiment, the width W ₆ of the writing operation area 31C is less than or equal to the width W ₂ of the touch panel 30 , and the length L ₆ of the writing operation area 31C is less than or equal to half of the touch panel 30 . Length L ₂ /2.

Further, the position of the writing operation area 31C defined on the touchpad 30 is determined based on the initial contact position of the user on the touchpad 30 . For example, as shown in FIG. 13 , with the lower left corner of the touchpad 30 as the origin (0,0), the initial contact position of the user on the touchpad 30 is the coordinates (X ₃₁ , Y ₃₁ ), And continuous writing moves to the coordinates (X ₃₂ , Y ₃₂ ), so the corresponding handwriting is displayed on the writing area 11C. The writing operation area 31C takes the X coordinate X ₃₁ of the initial contact position as the writing operation area 31C. The writing operation area 31C is defined by extending a first length N ₁₁ to the left and a second length N ₂₁ to the right, respectively, wherein the sum of the first length N ₁₁ and the second length N ₂₁ is equal to the writing The length L ₆ of the operation area 31C.

In one embodiment, as shown in FIG. 13 , when the X coordinate X ₃₁ of the initial contact position is less than or equal to half the length L ₂ /2 of the touch panel 30 , the first length N ₁₁ is less than the first length N 11 . Two lengths N ₂₁ , and the ratio of the first length N ₁₁ to the second length N ₂₁ may be 1:2 to 1:20. In another embodiment, as shown in FIG. 14 , when the X coordinate X ₃₃ of the initial contact position is greater than half the length L ₂ /2 of the touch panel 30 , the first length N ₁₂ is greater than the second length N 12 The length N ₂₂ , at this time, the ratio of the first length N ₁₂ to the second length N ₂₂ may be 2:1 to 20:1. Further, in one embodiment, as shown in FIG. 14 , when the X coordinate X ₃₃ of the initial contact position is greater than half the length L ₂ /2 of the touch panel 30 , the second length N ₂₂ is directed toward The first length N ₁₂ extends to the left until the sum of the first length N ₁₂ and the second length N ₂₂ is equal to the length L ₆ of the writing operation area 31C. .

In one embodiment, the writing operation area 31C may also be defined by an executed application program or an input method. For example, as shown in Figure 15, when the executed application or input method is written from left to right (for example, when the word file is edited into Chinese horizontal script, English input method, etc.), the coordinates (X ₃₄ , Y ₃₄ ) Move to the coordinates (X ₃₅ , Y ₃₅ ), then when defining the writing operation area 31C, the first length N ₁₃ extending to the left is less than the second length N ₂₃ extending to the right, that is, the writing operation area 31C It is based on the initial contact position (X ₃₄ , Y ₃₄ ) of the object to form most of the rightward extending patterns. For another example, as shown in Figure 16, when the executed application program or input method is written from right to left (for example, when the word file is edited as straight script, Arabic input method, etc.), that is, the coordinates (X ₃₇ , Y ₃₇ ) to the coordinates (X ₃₆ , Y ₃₆ ), then when defining the writing operation area 31C, the first length N ₁₄ extending to the left is greater than the second length N ₂₄ extending to the right, that is, the writing operation The region 31C is mostly left-extended on the basis of the initial contact position (X ₃₇ , Y ₃₇ ) of the object.

To sum up, the present invention provides more different input methods by adding multiple modes to the operation of the touch panel 30, so that the multiple different operation modes can better enable the user to adapt to the diversification of functions of the electronic device. Flexible use of the touch panel 30 as an input device can effectively improve the convenience of use as a whole.

Of course, the present invention can also have other various embodiments, without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and deformations according to the present invention, but these corresponding Changes and deformations should belong to the protection scope of the appended claims of the present invention.

Claims (31)

1. An electronic device, comprising:

a display panel;

a base, which is pivoted with the display panel;

a touch pad arranged on the base, wherein the length of the touch pad is greater than one half of the length of the display panel;

when a touch pen is close to or contacts the touch pad, the touch pad enters a first mode, a touch pen operation area is defined on the touch pad in the first mode, the ratio of the length to the width of the touch pen operation area is equal to the ratio of the length to the width of the display panel, and the operation of the touch pen in the touch pen operation area generates an instruction or handwriting in a corresponding position of the display panel.

2. The electronic device of claim 1, wherein the sensed position of the stylus on the touch pad corresponds to a position of the touch pad, and the corresponding position on the touch pad defines the stylus operation area.

3. The electronic device of claim 1, wherein the initial position of the touch pad is defined at the center of the touch pad, and when a finger touches the touch pad, the position of the touch pad is moved corresponding to the movement trace of the finger on the touch pad.

4. The electronic device according to any one of claims 1 to 3, wherein when an object approaches or touches the touch pad, the touch pad receives a signal from the object, and the object is determined to be the stylus.

5. The electronic device as claimed in claim 1, wherein the touch pad enters a second mode after a triggering event, and in the second mode, a writing area is displayed on the display panel, and when an object contacts the touch pad, a handwriting is formed on a moving track of the object on the touch pad and displayed in the writing area of the display panel.

6. The electronic device of claim 5, wherein in the second mode, an indication mark is displayed on the display panel to indicate the boundary of the writing area.

7. The electronic device as claimed in claim 6, wherein the indicator is a line extending outward from at least two sides of the writing area to the periphery of the display panel or a line extending outward from at least two sides of the writing area for a certain distance.

8. The electronic device of claim 6, wherein the indicator is a symbol indicating at least two sides or corners of the writing area.

9. The electronic device according to any one of claims 5 to 8, wherein the triggering event is a click of a physical button, a click of a predetermined position or a predetermined pattern on the touch pad, and a switching signal is generated.

10. The electronic device according to any one of claims 5 to 8, wherein in the second mode, when two fingers move on the touch pad and the distance between the two fingers decreases, the size of the writing area correspondingly decreases; when two fingers move on the touch pad and the distance between the two fingers is increased, the size of the writing area is correspondingly enlarged.

11. The electronic device according to any one of claims 5 to 8, wherein a ratio of a length to a width of the writing area is equal to a ratio of a length to a width of the touch pad.

12. The electronic device as claimed in any one of claims 5 to 8, wherein a writing area is defined on the touch pad, a ratio of a length to a width of the writing area is equal to a ratio of a length to a width of the writing area, and a moving track of the object in the writing area of the touch pad forms writing traces and is displayed in the writing area of the display panel.

13. The electronic device of claim 12, wherein the writing region is defined by a position on the touch pad corresponding to the object sensed, and a corresponding position on the touch pad.

14. The electronic device of claim 13, wherein the writing region is defined by taking an X-coordinate of an initial contact position as a reference point of the writing region and extending a first length to the left and a second length to the right, respectively.

15. The electronic device of claim 14, wherein the first length is less than the second length when the X-coordinate of the initial contact position is less than or equal to one-half of the length of the touch pad, and the first length is greater than the second length when the X-coordinate of the initial contact position is greater than one-half of the length of the touch pad.

16. The electronic device of claim 14, wherein the second length extends to the right of the touch pad when the X-coordinate of the initial contact position is greater than one-half of the length of the touch pad.

17. The electronic device of claim 14, wherein the first length is less than the second length when the executed application or input method is written from left to right, and the first length is greater than the second length when the executed application or input method is written from right to left.

18. An electronic device, comprising:

a display panel;

a base, which is pivoted with the display panel;

a touch pad disposed on the base;

the touch control panel enters a writing mode after a trigger event, a writing area is displayed on the display panel in the writing mode, and when an object contacts the touch control panel, the moving track of the object on the touch control panel forms writing handwriting and is displayed in the writing area of the display panel.

19. The electronic device of claim 18, wherein the length of the touch pad is greater than one-half of the length of the display panel.

20. The electronic device of claim 18, wherein in the second mode, an indication mark is displayed on the display panel to indicate the boundary of the writing area.

21. The electronic device of claim 20, wherein the indicator is a line extending outward from at least two sides of the writing area to a periphery of the display panel or a line extending outward from at least two sides of the writing area for a certain distance.

22. The electronic device of claim 20, wherein the indicator is a symbol indicating two sides or corners of the writing area.

23. The electronic device of any one of claims 18-22, wherein the triggering event is a physical button click, a predetermined position or a predetermined pattern on the touch pad click, or a specific application program being started to generate a switching signal.

24. The electronic device according to any one of claims 18 to 22, wherein in the second mode, when two fingers move on the touch pad and the distance between the two fingers decreases, the size of the writing area correspondingly decreases; when two fingers move on the touch pad and the distance between the two fingers is increased, the size of the writing area is enlarged.

25. The electronic device according to any one of claims 18 to 22, wherein a ratio of a length to a width of the writing area is equal to a ratio of a length to a width of the touch pad.

26. An electronic device according to any one of claims 18-22, wherein a writing area is defined on the touch pad, a ratio of a length to a width of the writing area is equal to a ratio of a length to a width of the writing area, and a moving track of the object in the writing area of the touch pad forms writing traces and is displayed in the writing area of the display panel.

27. The electronic device of claim 26, wherein the writing region is defined by the position of the object on the touch pad and the position of the object on the touch pad.

28. The electronic device of claim 27, wherein the writing region is defined by taking an X-coordinate of an initial contact position as a reference point of the writing region and extending a first length to the left and a second length to the right, respectively.

29. The electronic device of claim 28, wherein the first length is less than the second length when the X-coordinate of the initial contact position is less than or equal to one-half of the length of the touch pad, and the first length is greater than the second length when the X-coordinate of the initial contact position is greater than one-half of the length of the touch pad.

30. The electronic device of claim 28, wherein the second length extends to the right of the touch pad when the X-coordinate of the initial contact position is greater than one-half of the length of the touch pad.

31. The electronic device of claim 28, wherein the first length is less than the second length when the executed application or input method is left-to-right written, and the first length is greater than the second length when the executed application or input method is right-to-left written.

Images