Mount structure of touch input device having pressure sensitive sensor

• US 8,698,777 B2
• Filed: 09/22/2010
• Issued: 04/15/2014
• Est. Priority Date: 09/29/2009
• Status: Expired due to Fees

• Current Assignee: Nissha Printing Company Limited
• Original Assignee: Nissha Printing Company Limited
• Inventors: Endo, Yuko, Takai, Yuichiro, Kai, Yoshihiro, Suzuki, Takahiro
• Primary Examiner(s): Rogers, David A
• Application Number:
  US13/498,384
• Publication Number:
  US 20120182249A1
• Time in Patent Office: 1,301 Days
• Field of Search: 345/156, 345/173, 345/174
• US Class Current: 345/174
• CPC Class Codes: G01L 1/205 using distributed sensing elements
• CPC Class Codes: G06F 2203/04105 Pressure sensors for measuring the pressure or force exerted on the touch surface without providing the touch position
• CPC Class Codes: G06F 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• CPC Class Codes: G06F 3/04142 the force sensing means being located peripherally, e.g. disposed at the corners or at the side of a touch sensing plate
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes

Abstract

[Subject] To provide a mount structure of a touch input device having a pressure sensitive sensor in which visibility can be prevented from being lowered even when the pressure sensitive sensor is mounted, water-proofness and dust-proofness are excellent, and a pressure can be easily detected with high measurement accuracy.

[Solution] According to a mount structure of a touch input device which includes a touch input device having at least a touch panel, and a pressure sensitive sensor attached to a lower surface thereof, and a casing dented to allow the device to be externally fitted in, and having a concave part or an opening part for a display device, and a frame-shaped support part to support a back surface peripheral part of the touch input device, in its bottom surface, the pressure sensitive sensor includes a pressure concentration member laminated and arranged in a dot shape so as to support the pressure sensitive ink member on a back surface, and a frame-shaped gasket is attached between the pressure sensitive sensor and the support part of the casing, in which the gasket does not overlap with the pressure concentration member.

Claims

1. A mount structure of a touch input device comprising:

a touch input device having at least a touch panel, and a pressure sensitive sensor bonded to a lower surface of the touch panel; and

a casing dented to have a level difference to allow the touch input device to be externally fitted in, and having a concave part or an opening part for a display device, and a frame-shaped support part to support a back surface peripheral part of the touch input device, in a bottom surface thereof, wherein

the pressure sensitive sensor comprises;

a first substrate;

a second substrate arranged so as to be opposed to the first substrate and bonded to the lower surface of the touch panel;

a pair of frame-shaped electrodes arranged on one or both surfaces of a surface of the first substrate opposed to the second substrate and a surface of the second substrate opposed to the first substrate, along an edge part of the first or second substrate;

a conductive pressure sensitive ink member arranged on the surface of the first substrate opposed to the second substrate or the surface of the second substrate opposed to the first substrate so as to be apart from at least one of the pair of electrodes, and so as to be along the edge part of the first or second substrate, and having electric characteristics to be changed by a pressed force applied;

a gap holding member arranged in a region between the first substrate and the second substrate, to bond the first substrate and the second substrate with its adhesiveness, and hold a gap between the pressure sensitive ink member and at least one of the pair of electrodes; and

a pressure concentration member laminated and arranged in a shape of a dot on a surface opposite to the surface opposed to the second substrate, of the first substrate so as to support the pressure sensitive ink member, wherein

a frame-shaped gasket is attached between the pressure sensitive sensor and the support part of the casing, and the gasket does not overlap with the pressure concentration member.

2. The mount structure of the touch input device having the pressure sensitive sensor, according to claim 1, wherein

the pressure sensitive ink members are arranged in the shape of dots along two longitudinal sides of the first substrate or the second substrate, and correspond one-to-one to the pressure concentration members.

3. The mount structure of the touch input device having the pressure sensitive sensor, according to claim 1, wherein

the pressure sensitive ink members are arranged in a shape of a belt along two longitudinal sides of the first substrate or the second substrate.

4. The mount structure of the touch input device having the pressure sensitive sensor, according to claim 1, wherein

the frame-shaped gasket is provided with a through hole to house the pressure concentration member.

5. The mount structure of the touch input device having the pressure sensitive sensor, according to claim 4, wherein

the through hole of the gasket houses two or more pressure concentration members.

6. The mount structure of the touch input device having the pressure sensitive sensor, according to claim 1, wherein

all of the pressure concentration members are positioned in a frame of the frame-shaped gasket.

7. The mount structure of the touch input device having the pressure sensitive sensor, according to claim 6, wherein

an auxiliary member formed of a same material as that of the frame-shaped gasket is attached between the pressure sensitive sensor and the support part of the casing so as to position the pressure concentration member between the auxiliary member and the frame-shaped gasket.

8. The mount structure of the touch input device having the pressure sensitive sensor, according to claim 1, wherein

each of the first substrate, the second substrate, and the gap holding member is formed into a frame shape.

9. The mount structure of the touch input device having the pressure sensitive sensor, according to claim 1, wherein

each of the first substrate and the second substrate is formed into a flat plate with a transparent material, and a transparent window part is formed in a part except for the pair of electrodes.

10. The mount structure of the touch input device having the pressure sensitive sensor, according to claim 1, wherein

one of the pair of electrodes is arranged on the first substrate,

the other of the pair of electrodes is arranged on the second substrate, and

the pressure sensitive ink member is provided so as to cover a plurality of positions of the one or the other of the pair of electrodes.

11. The mount structure of the touch input device having the pressure sensitive sensor, according to claim 1, wherein

the pair of electrodes is arranged on the first substrate so as to be spaced with each other, and the pressure sensitive ink member is arranged on the second substrate.

12. The mount structure of the touch input device having the pressure sensitive sensor, according to claim 1, wherein

the pair of electrodes are arranged on the second substrate so as to be spaced to each other, and the pressure sensitive ink member is arranged on the first substrate.