Multi-layer liquid crystal panel

• US 4,260,224 A
• Filed: 08/02/1978
• Issued: 04/07/1981
• Est. Priority Date: 08/02/1977
• Status: Expired due to Term

• Current Assignee: Kabushiki Kaisha Suwa Seikosha
• Original Assignee: Kabushiki Kaisha Suwa Seikosha
• Inventors: Takayama, Masaji
• Primary Examiner(s): Bauer, Edward S.
• Application Number:
  US05/930,438
• Time in Patent Office: 979 Days
• Field of Search: 350/335, 350/334, 350/336
• US Class Current: 349/83
• CPC Class Codes: G02F 1/1345 Conductors connecting electrodes to cell terminals
• CPC Class Codes: G02F 1/1347 Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells
• CPC Class Codes: H05K 3/325 by abutting or pinching, i.e. without alloying process; mechanical auxiliary parts therefor adaptations of leads inserted in holes for press-fit connections H05K3/308

Abstract

In a multi-layer liquid crystal display panel the terminals for making connection to the electrodes on the plates of each cell layer are so disposed that the terminals for each cell are out of registry with the terminals for all of the other cells. The terminals are connected to external circuitry by way of conductive elastomer blocks, the compressibility of the blocks being such that substantially identical blocks can be used for making contact with the terminals on all of the plates.

Claims

1. A multi-layer liquid crystal display device comprising at least two liquid crystal display cells having four edges, said cells aligned along a line of sight, each display cell including a pair of opposed transparent glass plates with a liquid crystal material sealed therebetween, one of said plates of each cell having transparent electrode means disposed thereon for forming a common electrode, the other of said plates having a plurality of segmented transparent electrode means disposed thereon for forming at least one complete character when an electric field is selectively applied across said liquid crystal between said segment electrode means and said common electrode means, one of said plates having a terminal region on a single edge in each cell, said terminal region extending beyond the edge of the opposed plate, all of the terminals for connecting the electrodes of each display cell to the electrical circuitry through conducting resilient means being located on said terminal region, said terminal region for each cell extending beyond the corrresponding edges of the remaining cells behind said terminal region.

2. The multi-layer liquid crystal display device of claim 1, wherein the segmented electrode means for forming characters is disposed on the inner surface of the upper plate and the electrode means for forming the common electrode is disposed on the inner surface of the lower plate in each of the cells.

3. The multi-layer liquid crystal display device of claim 2, wherein said plates are rectangular.

4. The multi-layer liquid crystal display device of claim 3, wherein said segmented electrode means is a seven bar array for forming at least one complete alpha-numeric character on each cell.

5. The multi-layer liquid crystal display device of claim 1, further including conductive resilient means for electrically connecting said terminals at the terminal region with external circuitry for selectively applying the electric field to the cell.

6. The multi-layer liquid crystal display device of claim 5 including between two and four layers.

7. The multi-layer liquid crystal display device of claim 9 having two display cells, said terminal region for one display cell being on the opposite side of the display device from the terminal region for the second display cell, and further including conductive resilient means for electrically connecting said withdrawn electrodes at the terminal regions with external circuitry for selectively applying the electric field to the cells.