Color liquid crystal display device

Details Color liquid crystal display device Color liquid crystal display device

1983-05-31

1986-03-25

Curtis, Marshall M.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340784, 3408151, 358 44, G09G 336

Patent

active

045786720

DESCRIPTION:

BRIEF SUMMARY
DESCRIPTION

1. Technical Field
This invention relates to a full-color large-screen display device using liquid crystal, which is suitable as a large television screen or a graphic panel for advertizement.
2. Background Art
No suitable high-resolution full-color large-screen (3 to 20 m.sup.2) display device has been proposed in the art. If it is intended to realize a large screen in full colors with liquid crystal, then the liquid crystal must be driven in a static mode, and several hundreds of thousands of drive elements are required. Even if the elements are provided as integrated circuits, still several tens of thousands of integrated circuits are needed. This is one of the factors which obstructs provision of a large screen.
Another factor is that it is required to connect several hundreds of thousands of conductors to the output terminals of the liquid crystal.


DISCLOSURE OF THE INVENTION

In the invention, for instance the red, green and blue electrodes of a liquid crystal display unit are made different in area from one another, to simplify the control circuit, and a printed circuit board incorporating the control circuit is arranged substantially perpendicular to the display screen, which makes it possible to juxtapose a number of liquid crystal display units thereby to form a large screen.


BRIEF DESCRIPTION OF THE DRAWINGS

The parts (a) and (b) of FIG. 1 are a front view and a sectional side view showing a liquid crystal panel according to one embodiment of this invention.
FIG. 2 is a sectional view of a display module. FIG. 3 is a perspective view showing the entire arrangement of the display module. FIG. 4 is a perspective view showing a method of forming a large screen with a number of display modules. FIG. 5 is a diagram for a description of the electrical connection of the electrodes of the liquid crystal panel. FIG. 6 is a diagram showing an example of the waveform of a voltage applied to an electrode in the liquid crystal panel. The parts (a) and (b) of FIG. 7 are a front view and a plan view of a liquid crystal panel which uses guest-host type liquid crystal cells. FIG. 8 is a sectional view showing the structure of the guest-host type liquid crystal cells.


BEST MODE FOR CARRYING OUT THE INVENTION

A liquid crystal display device according to this invention which is employed as a large screen display device will be described with reference to the accompanying drawings.
The part (a) of FIG. 1 is a front view of a liquid crystal panel 10, and the part (b) of FIG. 1 is a sectional side view of the same. A number of such liquid crystal panels 10 are assembled together to form a large screen display device as described later.
The construction of the liquid crystal panel 10 will be described. A glass substrate (A) 2 having a transparent common electrode 1 on its one surface is confronted with a glass substrate (B) 4 having a number of sets of transparent electrodes 3 (each set having three transparent electrodes 3 different in area (which are arranged horizontally in the case of the part (a) of FIG. 1)) on it one surface in such a manner that the surfaces of electrodes 3 confront the surface of electrode 2. A liquid crystal 6 is sealed in the space defined by the two glass substrates with sealing members 5. Red (R), green (G) and blue (B) color filters 7 correspohding to the electrodes 3 of the glass substrate (B) 4 and a light-shielding mask 8 are formed, for instance, by printing on the surface of the glass substrate (A) 2. Polarizing plates 9 are bonded to the outer surfaces of the glass substrates (A) and (B) 2 and 4 with the polarization axes coinciding with each other, to form the liquid crystal panel 10. Hereinafter, one section comprising three transparent electrodes 3 in a group and the corresponding R, G and B color filters 7 will be referred to as "a picture element", when applicable. That is, a number of picture elements 101 forms the liquid crystal panel 10, and a number of display modules (described later) incorporating the liquid crystal panels 10 form a large screen displa

REFERENCES:
patent: 3982274 (1976-09-01), Chai
patent: 4063231 (1977-12-01), Mayer et al.
patent: 4384279 (1983-05-01), Fujita et al.
patent: 4410887 (1983-10-01), Stolov et al.
patent: 4481530 (1984-11-01), Wagensommer et al.

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