Computer graphics processing and selective visual display system – Display driving control circuitry – Physically integral with display elements
Reexamination Certificate
1999-08-19
2003-02-25
Saras, Steven (Department: 2675)
Computer graphics processing and selective visual display system
Display driving control circuitry
Physically integral with display elements
C345S103000, C349S150000
Reexamination Certificate
active
06525718
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a liquid crystal display device for use in a display apparatus of an electronic appliance for audi-visual purposes, a display apparatus of an OA (office automation) terminal, an advertisement display, and the like. In particular, the present invention relates to circuit boards (CBs) for supplying signals to a liquid crystal panel.
2. Description of the Related Art
Flexible CBs are used as circuit boards for supplying signals to a liquid crystal (LC) panel of an LC display device. For example, Japanese Laid-open Publication No. 4-115228 and Japanese Publication No. 8-28395 disclose LC display devices incorporating flexible CBs.
Neither of the above-mentioned publications discloses an LC display device in which terminal sections of a data-side glass substrate are provided in a narrow frame-like peripheral region.
SUMMARY OF THE INVENTION
A flexible circuit board according to the present invention includes: an insulative tape having a pair of long sides and a pair of short sides; a driving IC mounted on the insulative tape; an input terminal for receiving data signals and control signals to be sent to the driving IC; a first output terminal for outputting a signal from the driving IC; a second output terminal for outputting at least some of the data signals and control signals; and first and second power signal terminals for supplying a voltage to the driving IC, wherein the input terminal, the first output terminal, and the second output terminal are provided on one of the pair of long sides, the first power signal terminal being provided on one of the pair of short sides, and the second power signal terminal being provided on the other one of the pair of short sides.
In one embodiment of the invention, a notch is provided in the other one of the pair of long sides.
Alternatively, a flexible circuit board according to the present invention includes: an insulative tape having a pair of long sides and a pair of short sides; a driving IC mounted on the insulative tape; an input terminal for receiving a signal used on a data-side flexible circuit board; a first output terminal for outputting a signal from the driving IC; and a second output terminal for outputting the signal used on the data-side flexible circuit board, wherein the first output terminal and the second output terminal are provided on one of the pair of long sides, the input terminal being provided on at least one of the other one of the pair of long sides and inside the insulative tape.
In one embodiment of the invention, the signal used on the data-side flexible circuit board is at least one of a data signal, a control signal, and a power signal.
A liquid crystal display device according to the present invention includes: a scan-side glass substrate; a data-side glass substrate opposing the scan-side glass substrate; liquid crystal interposed between the scan-side glass substrate and the data-side glass substrate; an electrode transition portion provided between the scan-side glass substrate and the data-side glass substrate for transmitting a scanning signal output from the data-side glass substrate to the scan-side glass substrate; and data signal lines, control signal lines, and power signal lines provided on the data-side glass substrate.
Alternatively, a liquid crystal display device according to the present invention includes; a data-side flexible circuit board including: a first insulative tape having a pair of long sides and a pair of short sides; a first driving IC mounted on the first insulative tape; a first input terminal for receiving data signals and control signals to be sent to the first driving IC; a first output terminal for outputting a signal from the first driving IC; a second output terminal for outputting at least some of the data signals and control signals; and first and second power signal terminals for supplying a voltage to the first driving IC, wherein the first input terminal, the first output terminal, and the second output terminal are provided on one of the pair of long sides of the first insulative tape, the first power signal terminal being provided on one of the pair of short sides of the first insulative tape, and the second power signal terminal being provided on the other one of the pair of short sides of the first insulative tape; a scan-side flexible circuit board including: a second insulative tape having a pair of long sides and a pair of short sides; a second driving IC mounted on the second insulative tape; a second input terminal for receiving a signal used on the data-side flexible circuit board; a third output terminal for outputting a signal from the second driving IC; a fourth output terminal for outputting the signal used on the data-side flexible circuit board, wherein the third output terminal and the fourth output terminal are provided on one of the pair of long sides of the second insulative tape, the second input terminal being provided on at least one of the other one of the pair of long sides of the second insulative tape and inside the second insulative tape; a data-side glass substrate coupled to the data-side flexible circuit board and the scan-side flexible circuit board; a scan-side glass substrate opposing the data-side glass substrate; liquid crystal interposed between the scan-side glass substrate and the data-side glass substrate; an electrode transition portion provided between the scan-side glass substrate and the data-side glass substrate for transmitting a scanning signal output from the data-side glass substrate to the scan-side glass substrate; and data signal lines, control signal lines, and power signal lines provided on the data-side glass substrate.
Alternatively, a liquid crystal display device according to the present invention includes; a driving IC; a scan-side glass substrate having a first display driving terminal; a signal-side glass substrate having a second display driving terminal; and an electrode transition portion provided between the scan-side glass substrate and the signal-side glass substrate, wherein the driving IC is coupled to the second display driving terminal of the signal-side glass substrate; and the first display driving terminal of the scan-side glass substrate receives a signal, the signal being supplied to the driving IC via the electrode transition portion and the second display driving terminal.
In one embodiment of the invention, the signal is at least one of a data signal and a control signal.
In another embodiment of the invention, the liquid crystal display device further includes a scan-side printed crystal board for supplying the signal to the first display driving terminal of the scan-side glass substrate.
In still another embodiment of the invention, a seal region is provided in a periphery of the scan-side glass substrate and the signal-side glass substrate, the electrode transition portion being formed in the seal region.
Alternatively, a liquid crystal display device according to the present invention includes: a scan-side glass substrate having a first display driving terminal; a signal-side glass substrate having a second display driving terminal and a line; a first flexible circuit board having a first driving IC; and a second flexible circuit board having a second driving IC, wherein the first flexible circuit board is coupled to the scan-side glass substrate and the second flexible circuit board is coupled to the signal-side glass substrate, the first flexible circuit board being electronically coupled to the second flexible circuit board via an electrode transition portion provided between the scan-side glass substrate and the signal-side glass substrate.
Alternatively, a liquid crystal display device according to the present invention includes; a data-side printed circuit board having a power line; a signal-side glass substrate having a display driving terminal and a line; and a flexible circuit board having a driving IC, an output terminal being formed on one side of the flexible circuit board for outputti
Kawahigashi Yoshitsugu
Maeda Seiji
Murabe Shinji
Murakami Akira
Takahashi Nobuaki
Awad Amr
Edwards & Angell LLP
Neuner George W.
Saras Steven
Sharp Kabushiki Kaisha
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