CN1719397A - Capacitive touchpad with integrated graphics input - Google Patents

Abstract

A capacitive touch pad integrating graphic input function can provide multiple operation modes of keys, graphic input, handwriting input or a mouse and the like, a panel of the touch pad is defined with multiple areas, a plurality of patterns are printed on the areas corresponding to the provided operation modes, and the patterns comprise a mode switch for selecting the operation modes. In the graphical input mode, the plurality of regions includes a graphical input region providing graphical input. In the key mode, the key patterns included in the plurality of patterns simulate a keyboard. In the handwriting input mode, the plurality of regions includes a handwriting recognition region providing handwriting input. Under the mouse mode, the areas comprise a cursor action area and horizontal and vertical scrolling function areas.

Description

Capacitive touchpad with integrated graphics input

technical field

The present invention relates to a capacitive touch panel, in particular to a capacitive touch panel integrating graphic input functions.

Background technique

Touch panels are widely known and widely used in electronic products. The touchpad provides a simple, light and inexpensive pointing device, for example, the touchpad applied in a notebook computer provides the function of a mouse. FIG. 5 provides a schematic diagram of the operation principle of the capacitive touch panel, which includes an insulating plate 48 , a grounding plate 36 , a layer of Y-axis traces 38 , and a layer of X-axis traces 40 , and the latter three are connected to the control circuit 46 . An equivalent capacitance 42 exists between the Y-axis trace 38 and the ground plane 36 , and an equivalent capacitance 44 exists between the X-axis trace 40 and the ground plane 36 . When a finger or a conductor touches the insulating plate 48, the control circuit 46 can judge the touch position of the hand rest or the conductor by the change of capacitance, and further perform appropriate processing. Known touch panels have resistive, electromagnetic There are three types of capacitive and capacitive touch screens. Capacitive touch screens have been used in public telephones or navigation systems with Internet access, but they do not have graphic input and handwriting input functions. Resistive touch screens have been used in applications such as personal digital assistants (PDAs) or electronic dictionaries but cannot be input by lightly touching the user's finger. Current tablet computers (Tablet PC) or electronic school bags, etc., are equipped with touch panels that integrate handwriting recognition and key input functions, but they are resistive or electromagnetic. Resistive touchpads require concentrated pressure points and are prone to wear and tear during operation, while electromagnetic touchpads need to cooperate with a stylus with a battery for input.

In terms of performance and cost, capacitive touch panels clearly surpass resistive and electromagnetic touch panels. The working principle of the capacitive touch panel is to use the moment when the user's finger or conductor touches the touch panel to generate a capacitive effect, so the position of the finger or conductor can be determined by the change of the capacitance value. Therefore, the capacitive touch panel is not Like the electromagnetic touchpad, the stylus that consumes power must be used, and the use of the capacitive touchpad does not require concentrated pressure like the resistive touchpad, so the service life is longer. Furthermore, the composition of the capacitive touch panel is simple, there are few components, and the product yield is high, so that the cost of mass production of the capacitive touch panel is low.

On the other hand, in the current electronic devices, graphic input has become a new trend and the demand is also increasing. A touch panel with integrated graphics input function that is smaller, cheaper and more convenient to use is desired.

Contents of the invention

One of the objectives of the present invention is to provide a capacitive touch panel integrated with graphic input functions.

According to the present invention, a capacitive touch panel integrating graphics input function can provide multiple operation modes such as graphics input, keys, handwriting input or mouse, etc., the panel of the touch panel is defined with a plurality of areas, on which Many patterns are printed corresponding to the provided operation modes, and the plurality of patterns include a mode switching switch for selecting the operation modes. In the graphic input mode, the dedicated area includes a graphic input area for graphic input. In the key mode, the key patterns included in the plurality of patterns simulate a keyboard. In the handwriting input mode, the plurality of areas include a handwriting recognition area for handwriting input. In the mouse mode, the multiple areas include a cursor action area and horizontal and vertical scroll function areas.

Description of drawings

Fig. 1 is the schematic diagram of capacitive touch panel of the present invention;

1A is a schematic diagram of a capacitive touch panel of the present invention in a graphic input mode;

1B is a schematic diagram of the capacitive touch panel of the present invention in the button mode;

Fig. 1C is a schematic diagram of the capacitive touch panel of the present invention in the handwriting input mode;

1D is a schematic diagram of the capacitive touch panel of the present invention in mouse mode;

Fig. 2 is the schematic diagram that the present invention is applied on the mobile phone;

Fig. 3 is a schematic diagram of a capacitive touch panel of the present invention using a backlight;

4 is a schematic diagram of a capacitive touch panel using a front-end light source of the present invention; and

FIG. 5 is a schematic diagram of the operation principle of the capacitive touch panel.

Symbol Description:

10 capacitive touch panel 12 panels

14 mode switching switch pattern 16 virtual button area

18 virtual keypad 20 virtual keypad

22 monitors 24 graphics input area

26 handwriting recognition area 28 cursor action area

30 mobile phone 32 backlight

34 front light source 36 ground plate

38Y axis trace 40X axis trace

42 capacitors 44 capacitors

46 Control circuit 48 Insulation board

Detailed ways

1 is a schematic diagram of an embodiment of the present invention. The touch panel 10 includes a panel 12 for finger or conductor touch input, and a mode switch pattern 14 is on the panel 12 for touching to switch the capacitive touch panel 10. For graphics input, keystrokes, handwriting input or mouse mode, virtual keypads 16, 18 and 20 are defined on the panel 12 respectively, and a display 22 shows the data or current input by the virtual keypads 16, 18 and 20 operating mode.

When the user switches the touchpad 10 to the graphic input mode, the virtual keypad 16 and 20 become a graphic input area 24, which cooperates with the function key patterns of the virtual keypad 18 such as input, cancel, style and storage, as shown in FIG. 1A As shown, graphical input can be provided. The user can draw graphics with fingers or conductors in the graphics input area 24, and the graphics will be directly displayed on the display 22 and can be edited and then sent out.

When the user switches the touch panel 10 to the button mode, the number keys, # keys and * key patterns of the virtual key area 16, and the function key patterns of the virtual key area 18 such as dialing, cancel, and up and down directions , and the function key patterns of the virtual keypad 20 such as recovery, redial, and hold are shown in FIG. 1B , which can be used as a phone keyboard. The user can input the phone number to be dialed, and the input phone number is displayed on the display 22 after being processed by corresponding software or hardware.

When the user switches the touch panel 10 to the handwriting input mode, the virtual keypads 16 and 20 become handwriting recognition areas 26, which cooperate with the functional key patterns of the virtual keypad 18 such as input, cancel, font and word selection, such as As shown in FIG. 1C, a handwriting input operation can be provided. The user can write with fingers or conductors in the handwriting recognition area 26, and after being processed by corresponding software or hardware (such as a handwriting input recognition module), the results of handwriting input, such as traces or characters, symbols, etc., are displayed on the display 22 superior.

The handwriting input mode is significantly different from the graphics input mode. In the handwriting input mode, when the user's input stops for a period of response time, the handwriting input recognition module in the touch panel actively recognizes the user's input, while in the graphic input mode, it relies on The user issues a command to indicate the completion of the graphic input, wherein the reaction time can be adjusted according to the user's needs.

When the user switches the touch panel 10 to the mouse mode, the virtual key area 16 becomes a cursor action area 28, the user can control the action of the cursor in this area, and the virtual key area 18 becomes a vertical scroll function area, And the virtual button area 20 becomes the horizontal scrolling functional area, as shown in Figure 1D, wherein, the vertical and horizontal scrolling functional area provided by the virtual key area 18 and 20 is to emulate the mouse vertically or horizontally scrolling (scroll) window Function, its function is similar to, for example, the vertical and horizontal scroll bars in Microsoft office word processing software.

In addition, a finger identification module can also be added to identify the number of fingers touching the cursor action area 28, and generate different instructions according to the number of fingers, for example, when the finger identification module determines that two fingers touch the panel , simulating the function of clicking the left mouse button, and simulating the function of clicking the right mouse button when the finger recognition module judges that there are three fingers touching the panel.

Fig. 2 is a schematic diagram of the application of the present invention on a mobile phone 30. Because the capacitive touch panel 12 with integrated graphic input function is used, the user can use the mode switching switch to switch various input modes for input. The panel is switched to the handwriting input mode to name and save the file, and the user can still enter the file name in the handwriting input mode to call out the saved file for re-editing and use. In addition to making the thickness of the mobile phone thinner, the input function of the mobile phone is greatly improved. Compared with the button module of the traditional mobile phone, the cost is lower.

3 and 4 are schematic diagrams of the capacitive touch panel 10 of the present invention equipped with a light source, so as to be suitable for occasions with insufficient light. FIG. 3 is a case where the panel 12 applied to a capacitive touch panel is transparent, such as glass material. It uses a backlight 32 to illuminate the panel 12 from behind the panel 12 to display characters or patterns. FIG. 4 uses a front light source 34 to illuminate the panel 12 from the front of the panel 12 to provide characters or patterns on the surface of the illuminated panel.

In general, in the above description and drawings, the characters or patterns of the buttons are on the insulating board 48 of the panel 12 . Of course, other changes or modifications are also possible without departing from the spirit of the present invention.

If the present invention is used on an electronic device with a window operating system, all system operations can be completed without having to configure the two modes of mouse and keyboard at the same time. Advantages of small size and low cost.

The above description of the preferred embodiments of the present invention is for the purpose of clarification, and is not intended to limit the present invention to the disclosed form. It is possible to modify or change based on the above teachings or learning from the embodiments of the present invention. The embodiment is to explain the principle of the present invention and let those skilled in the art use various embodiments to select and describe the practical application of the present invention. The technical idea of the present invention is intended to be determined by the scope of the claims and their equivalents.

Claims (10)

1. the capacitive touch control plate of an integrated picture input function comprises: a panel is provided with finger or conductor and touches and import;

One mode selector switch pattern is graphic input mode or another input pattern for switching this capacitive touch control plate on this panel;

This panel has been defined many zones to should graphic input mode and another input pattern; And

Many patterns are on these many zones, for operating under this graphic input mode and another input pattern.

2. capacitive touch control plate according to claim 1, wherein this another input formula of touching is to be selected from the group that button, handwriting input and mouse are formed.

3. capacitive touch control plate according to claim 1 more comprises a display, for showing by the data of this panel input or present operator scheme.

4. capacitive touch control plate according to claim 1 more comprises a backlight behind this panel, for this panel provides illumination.

5. capacitive touch control plate according to claim 1 more comprises a front end light source in this panel the place ahead, for this panel provides illumination.

6. a mobile phone is characterized in that this mobile phone is provided with a capacitive touch control plate, and this Trackpad comprises:

One panel is provided with finger or conductor and touches and import;

One mode selector switch pattern is graphic input mode or another input pattern for switching the nuclear capacitive touch control plate on this panel;

This panel has been defined many zones to should graphic input mode and another input pattern; And

Many patterns are on these many zones, for operating under this graphic input mode and another input pattern.

7. mobile phone according to claim 6, wherein this another input pattern is to be selected from the group that button, handwriting input and mouse are formed.

8. mobile phone according to claim 6 more comprises a display, for showing by the data of this panel input or present operator scheme.

9. mobile phone according to claim 6 more comprises a backlight behind this panel, for this panel provides illumination.

10. mobile phone according to claim 6 more comprises a front end light source in this panel the place ahead, for this panel provides illumination.

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