Reflective liquid crystal display and connection assembly and method

• US 5,969,783 A
• Filed: 12/11/1998
• Issued: 10/19/1999
• Est. Priority Date: 12/11/1998
• Status: Expired due to Term

• Current Assignee: National Semiconductor Corporation (Texas Instruments, Inc.)
• Original Assignee: National Semiconductor Corporation (Texas Instruments, Inc.)
• Inventors: Mathew, Ranjan J., Takiar, Hem P.
• Primary Examiner(s): Sikes, William L.
• Assistant Examiner(s): CHOWDHURY, TARIFUR RASHID
• Application Number:
  US09/209,868
• Time in Patent Office: 312 Days
• Field of Search: 349/149, 349/150, 349/152, 257/676, 257/693, 257/778
• US Class Current: 349/150
• CPC Class Codes: G02F 1/133308 Support structures for LCD panels, e.g. frames or bezels
• CPC Class Codes: G02F 1/13452 Conductors connecting driver circuitry and terminals of panels
• CPC Class Codes: H01L 2224/05553 being rectangular
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2224/48465 the other connecting portion not on the bonding area being a wedge bond, i.e. ball-to-wedge, regular stitch
• CPC Class Codes: H01L 2224/73265 Layer and wire connectors
• CPC Class Codes: H01L 2224/8592 Applying permanent coating, e.g. protective coating
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/00014 the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
• CPC Class Codes: H05K 1/189 characterised by the use of a flexible or folded printed circuit H05K3/326 takes precedence

Abstract

A connection assembly (40) for operably coupling a plurality of independent imaging devices (41, 41;, 41") to an optical subsystem (42). The connection assembly (40) includes a unitary flex circuit device (43) having an elongated arm portion (45), and a plurality independent finger portions (46, 46'"'"', 46") extending from a distal end of the arm portion (45). Each finger portion (46, 46'"'"', 46") defines a coupling region (47, 47'"'"', 47") adapted to operably couple a respective imaging device (41, 41'"'"', 41") to a respective finger portion (46, 46'"'"', 46") for support thereof. The finger portions (46, 46'"'"', 46") are further adapted to strategically couple each respective imaging device (41, 41'"'"', 41") to the optical subsystem (42) as a unit. The flex circuit device (30) includes a plurality of circuits (65) terminating at respective terminals (40) of a coupling region (47) thereof. The terminals (66) supportively and communicably coupled to the bond pads (67) of the die (58) for support thereof. The coupling region (47) further includes an adhesive mount (76) mounting the flex circuit device (43) to the transparent plate to supportably suspend the display assembly (57) between the die (58) and the transparent plate (61).

Claims

1. A liquid crystal display assembly comprising:

a display device including;

a die having a pixel array and a plurality of bond pads in electrical communication with the pixel array;

a transparent plate;

an adhesive seal adhesively coupling the die to the transparent plate, said adhesive seal, said transparent plate and said die cooperating to define a sealed volume therebetween encompassing the pixel array; and

a liquid crystal material disposed within the sealed volume; and

a flex circuit device having a plurality of circuits terminating at respective terminals of a coupling region thereof, said terminals supportively and communicably coupled to said bond pads of said die for support thereof at one portion, and another portion of said coupling region of said flex circuit device further including an adhesive mount for mounting the circuit device to said transparent plate to supportably suspend said display device between said die and said transparent plate in a manner substantially minimizing the transmission of residual stresses induced by or acting upon said die.

2. The liquid crystal display assembly as defined in claim 1 wherein,

the circuit terminals are coupled to said bond pads at a proximal end of said die, and said adhesive mount suspendably couples said flex circuit device to said transparent plate at an opposite distal end thereof.

3. The liquid crystal display assembly as defined in claim 2 wherein,

said flex circuit device includes a ground circuit electrically coupled to said adhesive mount, and said adhesive mount being adapted to electrically coupling said transparent plate to said ground circuit for grounding thereof.

4. The liquid crystal display assembly as defined in claim 3 wherein,

said proximal end of said die includes a proximal lip portion containing said bond pads and formed to extend beyond a proximal end of said transparent plate, and said distal end of said transparent plate includes a distal ledge portion formed to extend beyond a distal end of said die to engage said adhesive mount.

5. A liquid crystal display assembly comprising:

a display device including;

a die having a pixel array and a plurality of bond pads in electrical communication with the pixel array;

a transparent plate;

an adhesive seal adhesively coupling the die to the transparent plate, said adhesive seal, said transparent plate and said die cooperating to define a sealed volume therebetween encompassing the pixel array; and

a liquid crystal material disposed within the sealed volume; and

a support device having a plurality of circuits terminating at respective terminals of a coupling region thereof, said terminals supportively and communicably coupled to said bond pads of said die for support thereof at one portion, and another portion of said coupling region of said support device further including an adhesive mount for mounting the support device to said transparent plate to supportably suspend said display device between said die and said transparent plate in a manner substantially minimizing the transmission of residual stresses induced by or acting upon said die.

6. The liquid crystal display assembly as defined in claim 5 wherein,

the circuit terminals are coupled to said bond pads at a proximal end of said die, and said adhesive mount suspendably couples said support device to said transparent plate at an opposite distal end thereof.

7. The liquid crystal display assembly as defined in claim 6 wherein,

said support device includes a ground circuit electrically coupled to said adhesive mount, and said adhesive mount being adapted to electrically coupling said transparent plate to said ground circuit for grounding thereof.

8. The liquid crystal display assembly as defined in claim 7 wherein,

said proximal end of said die includes a proximal lip portion containing said bond pads and formed to extend beyond a proximal end of said transparent plate, and said distal end of said transparent plate includes a distal ledge portion formed to extend beyond a distal end of said die to engage said adhesive mount.

9. The liquid crystal display assembly as defined in claim 5 wherein,

said support device includes a flex circuit device.