Flexible liquid crystal display with integrated driver circuit and display electrodes formed on opposite sides of folded substrate

• US 5,436,744 A
• Filed: 09/03/1993
• Issued: 07/25/1995
• Est. Priority Date: 09/03/1993
• Status: Expired due to Term

• Current Assignee: Motorola Mobility LLC (Lenovo Group Ltd.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Swirbel, Thomas J., Arledge, John K.
• Primary Examiner(s): Sikes, William L.
• Assistant Examiner(s): Duong, Tai V.
• Application Number:
  US08/115,625
• Time in Patent Office: 690 Days
• Field of Search: 359/82, 359/87, 359/88, 359/74, 359/83, 359/81, 359/89
• US Class Current: 349/150
• CPC Class Codes: G02F 1/13452 Conductors connecting driver circuitry and terminals of panels

Abstract

A liquid crystal display (LCD) package (10) is made by creating an indium/tin oxide electrode (64) on the surface of a flexible substrate (60). The electrode is connected to conductive vias (68) in the flexible substrate by conductive runners (66) that are also indium/tin oxide with an overlayer of copper. The indium/tin oxide is typically sputtered, and the copper is sputtered or plated on selected portions of the runners. The conductive vias are further connected to a circuitry pattern (62) on an opposite side of the flexible substrate. A display driver (70) is attached to the circuitry pattern to drive the LCD (5). A second substrate (80), also with a film electrode (82) on it, is arranged in mutually opposing planar relationship to the flexible substrate in order to form a liquid crystal display. A liquid crystal material (86) is then filled in the gap between the two substrates creating an LCD module (10). The LCD module can be folded about a portion (72) of the flexible substrate so that the display driver circuit is directly underneath the film electrode. An adhesive bonding agent (77) is used to retain the flexible substrate in the folded position.

Claims

1. A liquid crystal display device, comprising:

a first flexible substrate having first and second opposing sides and conductive vias therethrough;

a film electrode disposed on the first side and connected to the conductive vias by conductive runners;

a circuitry pattern disposed on the second side and connected to the film electrode by the conductive vias;

a second substrate having an electrode disposed thereon, the first and second substrates arranged in a mutually opposing planar relationship for forming a liquid crystal display device;

a liquid crystal material disposed between the first and second substrates;

a display driver attached to the circuitry pattern on the second side of the flexible substrate and

the flexible substrate is folded 180°

so that the display driver is directly below the film electrode.

2. The liquid crystal display device as described in claim 1, further comprising a bonding agent to maintain the flexible substrate in the folded position.

3. A liquid crystal display device, comprising:

a first flexible substrate having first and second opposing sides and conductive vias therethrough;

a film electrode disposed on the first side and connected to the conductive vias by conductive runners;

a circuitry pattern disposed on the second side and connected to the film electrode by the conductive vias;

a second substrate having an electrode disposed thereon, the first and second substrates arranged in a mutually opposing planar relationship for forming a liquid crystal display device;

a liquid crystal material disposed between the first and second substrates;

a display driver attached to the circuitry pattern on the second side of the flexible substrate and

the flexible substrate is folded 90°

.

4. A liquid crystal display device, comprising:

a first flexible polyester substrate having first and second opposing sides and conductive vias therethrough;

an indium-tin oxide electrode disposed on the substrate first side and connected to the conductive vias by conductive runners comprising a layer of copper superimposed upon a layer of indium-tin oxide;

an indium-tin oxide circuitry pattern disposed on the substrate second side and connected to the electrode by the conductive vias;

a second substrate having an indium-tin oxide electrode disposed thereon, the first and second substrates arranged in a mutually opposing planar relationship for forming a liquid crystal display device;

a liquid crystal material disposed between the first and second substrates;

a display driver attached to thee circuitry pattern on the second side of the flexible substrate;

the flexible substrate folded 180°

so that the display driver is directly below the indium-tin oxide electrode; and

a bonding agent to maintain the flexible substrate in the folded position.