CURVED TOUCH PANEL, METHOD FOR FABRICATING THE SAME, AND DISPLAY SYSTEM WITH THE SAME

• US 20130335375A1
• Filed: 04/20/2012
• Published: 12/19/2013
• Est. Priority Date: 05/16/2011
• Status: Abandoned Application

• Current Assignee: Nissha Printing Company Limited
• Original Assignee: Nissha Printing Company Limited
• Inventors: Nishikawa, Kazuhiro, Takahata, Kazuhiko, Nakamura, Kazuto, Tsuchida, Noriaki, Sakashita, Asako, Yotsuya, Kenji, Nagase, Ryohei, Iimuro, Akiyuki, Maruyama, Jun
• Application Number:
  US14/002,576
• Publication Number:
  US 20130335375A1
• Time in Patent Office: Days
• US Class Current: 345/174
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• CPC Class Codes: G06F 3/0448 Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality
• CPC Class Codes: H01H 2219/06 Reflector
• CPC Class Codes: H03K 2017/9602 characterised by the type or shape of the sensing electrodes

Abstract

A method for fabricating a capacitive curved touch panel is provided for solving the problems of the conventional methods, i.e., unsuitableness of the methods for mass production and fabricating large touch panels and touch panels of complicated curved surface shapes. The method includes the steps of (a) preparing a patterned plate 13 by forming an electrode layer having a plurality of electrode regions 15 on a thermoplastic resin plate 11 with an electrically-conductive ink comprised of an electrically-conductive substance and a binder, (b) preparing a soft curved product 21 by heating to soften the patterned plate 13 and shaping the softened patterned plate on a die 22, and (c) cooling or allowing to cool the soft curved product to make the touch panel.

Claims

1-10. -10. (canceled)

11. A method for fabricating a capacitive touch panel having a curved touch surface, comprising the steps of:

(a) preparing a patterned plate by forming an electrode layer having a plurality of electrode regions on a thermoplastic resin plate with an electrically-conductive ink comprised of an electrically-conductive substance and a binder;

(b) heating and softening said patterned plate, and shaping said patterned plate into a soft curved product; and

(c) cooling or allowing to cool said soft curved product to make said touch panel.

12. A method for fabricating a capacitive touch panel according to claim 11, wherein said thermoplastic resin plate is a light-scattering resin plate.

13. A method for fabricating a capacitive touch panel according to claim 11, wherein said electrically-conductive substance in said electrically-conductive ink comprised of said electrically-conductive substance and said binder, is carbon nanotube.

14. A method for fabricating a capacitive touch panel according to claim 11, wherein said electrode layer comprises a first electrode layer and a second electrode layer superposed over said first electrode layer, each of said first electrode layer and second electrode layer has a plurality of electrode regions, and one electrode region contained in said first electrode layer overlaps with at least two electrode regions contained in said second electrode layer.

15. A method for fabricating a capacitive touch panel according to claim 11, wherein said plurality of the electrode regions contained in said electrode layers are formed by dividing an area coated with the electrically-conductive ink, which covers a whole area of the plurality of the electrode regions, by means of photolithography.

16. A display system comprising:

a curved capacitive touch panel having a curved touch surface, said touch panel including a patterned plate formed of a light-scattering thermoplastic resin plate; and

an electrode layer having a plurality of electrode regions on the thermoplastic resin plate electrically separated from each other, said electrode regions being formed of an electrically-conductive ink comprised of an electrically-conductive substance and a binder;

an image memory unit for storing an image data therein;

a computer for transmitting the image data;

an image projection unit for producing a projected image from the image data transmitted by the computer;

a light-path-reflecting mirror for reflecting the projected image projected from the image projection unit; and

a touch panel controller for monitoring a change of a capacitance in the electrode regions, the touch panel controller connecting electrically to the electrode regions of the tough panel,

wherein the touch panel displays the projected image reflected by the light-path-reflecting mirror, and

the touch panel controller transmits a touch signal to the computer when the change of the capacitance is detected, and the computer executes a predetermined processing when the touch signal is received.

17. A display system according to claim 16, further comprising a LAN (local area network) unit connected to a network,

wherein the LAN receives a signal from said network and transmits the signal to said computer such that said computer executes a processing according to the signal.

18. A display system according to claim 16, further comprising a load sensor mounted at a position where the touch panel is attached to said system, and a load sensor controller;

wherein said load sensor is electrically connected to said load sensor controller, said load sensor controller monitors a change in a load sensed by said load sensor, detects the change in the load, and upon detection of the change, transmits a signal of the change in the load to said computer, and said computer receives the signal and executes a predetermined processing.

19. A display system according to claim 16, further comprising an audio amplifier and a speaker utilizing said touch panel as a diaphragm;

wherein a source of vibration for said speaker is mechanically connected to said touch panel and an output from said audio amplifier is input to the source of vibration to produce sound.