JPH0944304A - Touch panel input display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To exclude erroneous input due to the touch of a part of the hand by providing a touch panel in which the density of a spacer in an area with which the hand is to be touched is increased and depression sensitivity is decreased. SOLUTION: The touch panel 1 comprises an upper transparent panel 2 and a lower transparent panel 3, and a gap is held with the spacer 19. A reference voltage 15 is supplied to the touch panel 1 by a switch 14 to detect the position information of the depressed point of the touch panel, and it is read by an A/D converter 16, and converted in to display coordinates by a CPU 17, and displayed on a liquid crystal display 18. The upper transparent panel 2 and the lower transparent panel 3 in the area with which a part of the hand comes in contact when pen input is performed are formed so as to increase the density of the spacer 19 located between them on the touch panel 1 and to prevent them from coming in contact with each other due to pressure generated by touching with a part of the hand.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an input device of a computer or a portable information terminal, and eliminates erroneous input due to touch by a hand when a pen is input on a touch panel.

[0002]

2. Description of the Related Art In recent years, a computer input device which replaces a keyboard and a touch panel input device as an input device of a portable information terminal have attracted attention, and future development is expected.

At present, there are roughly three types of input methods using a pen of a computer or a portable information terminal, that is, a resistance film method, an electrostatic coupling method, and an electromagnetic induction method. Among them, the resistance film method is excellent in power consumption, cost, and finger input.

FIG. 3 shows a conventional touch panel input display device using a resistive film type touch panel. In FIG. 3, a resistance film 4 is uniformly formed on the entire lower surface of the upper transparent panel 2, and a resistance film 5 is uniformly formed on the entire upper surface of the lower transparent panel 3. The upper transparent panel 2 and the lower transparent panel 3 are separated by a spacer 19 with a gap. A display 18 such as a liquid crystal is arranged under the touch panel 1, and the pressing position information obtained on the touch panel 1 is displayed on the display 18 to realize inputting with a sense of writing a character with a pen, The operation of the switch for selecting the area displayed on the display 18 with a finger is realized.

The pressing position detecting operation when the point P is pressed will be described with reference to FIG. The resistive touch panel is
The position is detected twice in the X and Y directions. First, a reference voltage 15 is applied between the extraction electrodes 6 and 7 of the upper transparent panel 2.
SW1, SW2, SW3 of the switch 14 to give
Is connected to the X side. Resistive film 4 is evenly formed on the upper transparent panel 2.
, The voltage E proportional to the position in the X direction is formed.
xp is applied to the point P. The voltage Exp is converted from the lead electrode 8 of the lower transparent panel 3 which is pressed and is in contact with the X-direction position information by the A / D converter 16. Next lower transparent panel 3
SW1, SW2, and SW3 of the switch 14 are connected to the Y side so that the reference voltage 15 is applied between the extraction electrodes 8 and 9. Since the resistance film 5 is uniformly formed on the lower transparent panel 3, the voltage Eyp proportional to the position in the Y direction is applied to the point P. The voltage Eyp is converted into Y-direction position information by the A / D converter 16 from the extraction electrode 6 of the upper transparent panel 2 which is pressed and is in contact. The CPU 17 displays information on the display 18 based on the position information in the XY directions.

In the touch panel input display device configured as described above, the position input with a pen or the like is read as a voltage proportional to the position in the X direction and the Y direction, and the position information is displayed on the display 18 and displayed on the paper. It is possible to display the written character or figure on the display 18 as if writing the character with a pen.

[0007]

However, in the above-mentioned configuration, when the touch panel input display device is wider than the palm of the hand, when the user tries to input on the touch panel with the pen, a part of the hand touches the touch panel and the touch point is touched. Will be erroneously entered as input information.

The present invention has been made in view of the above problems, and when an input is made on a touch panel with a pen, even if a part of a hand touches the touch panel, the touch point is not input as input information. To provide.

[0009]

In order to solve the above-mentioned problems, a touch panel input display device of the present invention includes a touch panel in which the density of spacers in a region touched by a hand is increased and the pressing sensitivity is lowered when inputting with a pen, and a touch panel. A display for displaying the pressed point, a reference power source for applying a voltage to the resistive film of the touch panel to detect the pressed point, a switch for switching the X direction, the Y direction and the detection direction, It has an A / D converter that converts the voltage of the point that is pressed into reading position information, and a CPU that converts the position information of the pressed point into display coordinates on the display and displays the coordinates.

[0010]

With the above structure, since the pressing sensitivity of the area touched by the hand is lowered, the upper transparent panel and the lower transparent panel of the touch panel do not contact with each other when touching with a pen when the hand touches them. Does not detect location information.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A touch panel input display device according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of a touch panel input display device according to an embodiment of the present invention, and FIG. 2 is a schematic sectional view of the touch panel input display device. In FIGS. 1 and 2, reference numeral 1 is a touch panel, which is composed of an upper transparent panel 2 and a lower transparent panel 3, and is separated by a spacer 19 with a gap. A reference voltage 15 is applied to the touch panel 1 by the switch 14 to detect the position information of the pressed point on the touch panel, the A / D converter 16 reads the reference voltage 15, and the CPU 17 is provided to convert and display the display coordinates. A display 18 such as a liquid crystal for displaying is arranged.

The pressing position detecting operation will be described with reference to FIG. The resistance film type touch panel detects the position twice in the X direction and the Y direction. First, SW1, SW2, and SW3 of the switch 14 are connected to the X side so that the reference voltage 15 is applied between the extraction electrodes 6 and 7 of the upper transparent panel 2.
Since the resistive film 4 is uniformly formed on the upper transparent panel 2, the voltage Exp that is proportional to the position in the X direction is applied to the point P.
The voltage Exp is converted from the lead electrode 8 of the lower transparent panel 3 which is pressed and is in contact with the X-direction position information by the A / D converter 16. Next, the extraction electrode 8 of the lower transparent panel 3,
SW of switch 14 so as to apply reference voltage 15 between 9
1, SW2, SW3 are connected to the Y side. Lower transparent panel 3
Since the resistance film 5 is uniformly formed on the point P, a voltage Eyp proportional to the position in the Y direction is applied to the point P. The voltage Eyp is converted into Y-direction position information by the A / D converter 16 from the extraction electrode 6 of the upper transparent panel 2 which is pressed and is in contact. C
The PU 17 displays information on the display 18 based on the position information in the XY directions.

As shown in FIG. 2, the density of spacers 19 between the upper transparent panel 2 and the lower transparent panel 3 of the touch panel 1 is increased and a part of the hand is touched in the area touched by a part of the hand during pen input. The upper transparent panel 2 and the lower transparent panel 3 are prevented from coming into contact with each other with a pressure of a touching level. In FIG. 1, the region where the density of the spacers 19 is increased is the lower half of the touch panel 1, but it may be the lower right quarter of the touch panel 1. That is, only pen input can be performed in the area where the density of the spacers 19 is increased on the touch panel 1, and both pen input and finger input can be performed in the area where the density of the spacers 19 is not increased.

As described above, according to the present embodiment, it is possible to eliminate erroneous input due to touch with the hand during pen input.

[0016]

As described above, according to the present invention, when an input is made on the touch panel with a pen, even if a part of the hand touches the touch panel, the contact point is not erroneously input as input information, and the spacer In areas with low density and high pressure sensitivity,
Both touch switch input with a finger and input with a pen are possible.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a touch panel input display device according to an embodiment of the present invention.

FIG. 2 is a schematic sectional view of FIG.

FIG. 3 is a block diagram of a conventional touch panel input display device.

[Explanation of symbols]

 1 Touch Panel 2 Upper Transparent Panel 3 Lower Transparent Panel 4, 5 Resistive Film 6, 7, 8, 9 Lead-out Electrode 14 Switch 15 Reference Power Supply 16 A / D Converter 17 CPU 18 Display 19 Spacer

Claims (1)

[Claims] 1. A touch panel in which the density of spacers in a region touched by a hand is increased to reduce pressure sensitivity when inputting with a pen,
A display for displaying a touched point on the touch panel, a reference power supply for applying a voltage to a resistive film of the touch panel for detecting the pressed point, a switch for switching between the X direction, the Y direction and the detection direction, An A / D converter that converts the voltage at the pressed point into reading position information;
A touch panel input display device, comprising: a CPU for converting position information of a pressed point into display coordinates of a display and displaying the display coordinates.