Flat panel display device and manufacturing method thereof

• US 20020015129A1
• Filed: 10/17/2001
• Published: 02/07/2002
• Est. Priority Date: 11/19/1997
• Status: Active Grant

• Current Assignee: Japan Display Central Incorporated (Japan Display Incorporated)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Ito, Yoshihiro, Hasegawa, Tatsuya, Ohkubo, Masaichi, Tokunaga, Sanae
• Granted Patent: US 6,545,737 B2
• Time in Patent Office: Days
• US Class Current: 349/149
• CPC Class Codes: G02F 1/13452 Conductors connecting driver circuitry and terminals of panels
• CPC Class Codes: H05K 1/0269 for visual or optical inspection
• CPC Class Codes: H05K 1/117 Pads along the edge of rigid circuit boards, e.g. for pluggable connectors
• CPC Class Codes: H05K 2201/0108 Transparent
• CPC Class Codes: H05K 2201/09663 Divided layout, i.e. conductors divided in two or more parts
• CPC Class Codes: H05K 2201/09781 Dummy conductors, i.e. not used for normal transport of current; Dummy electrodes of components
• CPC Class Codes: H05K 2203/166 Alignment or registration; Control of registration
• CPC Class Codes: H05K 3/323 by applying an anisotropic conductive adhesive layer over an array of pads
• CPC Class Codes: H05K 3/361 Assembling flexible printed circuits with other printed circuits

Abstract

An object of this invention is to provide a manufacturing method of a flat panel display device, in which, to match the position of a lead 30 of a TCP 12 with that of a land 32 of a PCB 14, light is irradiated from a lighting device 22 located substantially just above an axis line of a lead 30 and a shadow is photographed by a camera 20 so as to match the position thereof As a result, this makes it possible to match the positions of the TCP having leads having a fine pitch with those of the lands of the PCB.

Claims

1. A flat panel display device comprising:

a display panel having a plurality of display picture elements;

a first wiring board one end of which is electrically connected to said display panel and provided with a first terminal group at the other end thereof;

a second wiring board for outputting a control signal to said display panel, having a second terminal group corresponding to said first terminal group at a main surface thereof, and said second terminal group being electrically connected to said first terminal group through an anisotropic conductive film,

wherein said second wiring board includes position indicating marks for indicating a disposition position of said anisotropic conductive film.

2. A flat panel display device according to claim 1 wherein said second terminal group and said position indicating mark are produced in the same process.

3. A flat panel display device according to claim 1 wherein a region corresponding to said second terminal group, on a surface corresponding to said main surface of said second wiring board or on an inside layer of said second wiring board contains a thin film portion.

4. A flat panel display device according to claim 3 wherein said thin film portion is electrically independent.

5. A manufacturing method of a flat panel display device having:

a display panel including a plurality of display picture elements;

a flexible electrode substrate having a plurality of leads to be connected electrically to the display panel; and

a wiring board having a plurality of lands corresponding to said leads of said flexible electrode substrates and for supplying a control signal to said display panel, comprising the steps of;

disposing said leads of said flexible electrode substrate on said lands of said wiring board;

irradiating a light of which axis is inclined at an angle smaller than 90°

relative to an axis line of said lead; and

detecting relative positions of said leads and said lands and matching positions thereof.

6. A manufacturing method according to claim 5 wherein said light source is located within a range more than 0°

and less than 90°

, relative to the axis line of the lead of said flexible electrode substrate.

7. A manufacturing method according to claim 5 wherein said light source is located within a range less than 40°

relative to the axis line of the lead of said flexible substrate.

8. A manufacturing method according to claim 5 wherein said flexible substrate has light transmitting characteristic.

9. A flat panel display device comprising;

a display panel,

a flexible substrate having leads and a connecting region at an end of each leads, and connected to said display panel,

a wiring board having lands corresponding to said leads, said lands disposed on a top surface thereof, and

an anisotropic conductive film disposed between said leads and lands so as to electrically connect them;

wherein said lands are longer than the connecting region of the leads.

10. A flat panel display device comprising;

a display panel,

a flexible substrate having leads and a connecting region at an end of each leads, and connected to said display panel,

a wiring board having lands corresponding to said leads, said lands disposed on a top surface thereof, and

an anisotropic conductive film disposed between said leads and lands so as to electrically connect them;

wherein said lands are longer than a width of said anisotropic conductive film.

11. A manufacturing method of a flat panel display device having:

a display panel;

a flexible electrode substrate having a plurality of leads to be electrically connected to the display panel; and

a wiring board having a plurality of lands corresponding to said lead of said flexible substrate and for supplying a control signal to said display panel, comprising the steps of;

disposing said anisotropic conductive film on said wiring board in accordance with position indicating marks provided on said wiring board to indicate a wiring position of said anisotropic conductive film;

disposing said leads of said flexible substrate on said lands of said wiring board;

irradiating a light of which axis is inclined at an angle smaller than 90°

relative to an axis line of said lead;

detecting relative positions of said leads and said lands and matching positions thereof; and

fixing said flexible substrate and said wiring board with said anisotropic conductive film.