Citizen Watch Company, Ltd.

Citizen Holdings Company, Ltd.

Kiyoshi Kamiya

Fuminori Suzuki

Masaaki Matsunaga

Eiichi Tajima

Isao Ochi

Takashi Ogura

Toshihide Hirohara

Atsushi Shiraishi

Tetsuo Tanaka

The present invention provides a laminated liquid crystal display device having a configuration in which substrates for both panels can be electrically connected easily. The display device, which is implemented by multiple-layered liquid crystal cell panels configured by laminating a liquid crystal cell panel having a rigid panel substrate and a liquid crystal cell panel having a flexible panel substrate, makes use of the flexibility of the flexible panel substrate for making electrical connection between the flexible panel substrate and the rigid panel substrate. A part of the flexible panel substrate is protruded and, on this protrusion, electrode wire lines are provided for making electrical connection between the panel substrates. Bending the flexible panel substrate allows the electrode wire lines, formed on the protrusion, to be brought into contact with the rigid panel substrate.

Multiple-layer liquid crystal display device having a flexible substrate

In displaying a price label, the price can be displayed at low resolution without any problem, but a bar code requires a high resolution display. In view of this, the invention provides an electrode structure for a display apparatus that can suppress increases in cost and power consumption while preventing image quality degradation, even when a low-resolution display area and a high-resolution display area are mixed on the same display. A liquid crystal panelhas a main display sectionand a sub-display section. In the main display section, pixels are arranged in a matrix pattern. In the sub display section, rectangle-shaped pixels are arranged in a single row, and the pixel pitch in the sub display sectionis m/n of that in the main display section(n and m are integers).

Display apparatus

A liquid crystal display device has a liquid crystal layer ( ) sandwiched between an upper substrate ( ) having scanning electrodes ( ) and a lower substrate ( ) having opposite electrodes ( ) and electrode driving ICs ( ), mounted only at a side of the upper substrate ( ), for driving the respective electrodes, in which connecting wirings ( ) for connecting the scanning electrode driving ICs ( ) and the scanning electrodes ( ) are disposed between an image display portion ( ), which is provided on the inner side of a sealing portion ( ) for bonding the substrates ( ) together, and the sealing portion ( ). The connecting wirings ( ) and the scanning electrodes ( ) are electrically connected to each other at connecting regions ( ) provided in the sealing portion ( ), and a shielding ( ) is provided between the image display portion ( ) and the sealing portion ( ).

Liquid crystal display device

An auto-pedestal level clamp circuit, which clamps a pedestal level of a television signal input through a DC blocking capacitor using a pedestal level clamp switch to automatically adjust the pedestal level, includes a level detecting circuit for detecting a luminance signal level of the television signal, and an A/D converter for judging a luminance of a frame based on the output from the level detecting circuit. The level detecting circuit includes first and second gates, first and second switches controlled by the first and second gates, and a smoothing circuit. The pedestal level of the television signal input to the level detecting circuit through the pedestal level clamp switch is adjusted based on an integral potential level of the output from the A/D converter.

Auto-pedestal level clamp circuit

A circuit for generating vertical and horizontal sync signals suitable for a display which is driven by digital signals, e.g. a liquid crystal display panel of a television receiver, whereby purely digital circuit elements can be utilized throughout, as opposed to conventional sync signal generating circuits which are basically of analog type. Recognition of sync signal components derived from a composite video signal is based on time discrimination using counters and gate circuits, and the circuits can be substantially entirely implemented within a single low power-consumption integrated circuit, e.g. a CMOS IC.

Synchronization signal generating circuit

A method of driving a liquid crystal display panel of a TV receiver whereby of each set of six scanning lines consisting of three successive lines of one field and three corresponding lines of the succeeding field, three lines are displayed by display elements driven by one scanning electrode and the remaining three lines by display elements driven by an immediately adjacent scanning electrode. One of the three lines to be displayed by the action of each electrode may be omitted. An increase in display resolution of approximately 4/3 is attained, by comparison with a simple prior art drive method.

Method of driving liquid crystal display panel of TV receiver

A synchronous separation circuit comprises a capacitor, one end of the capacitor serving as an input terminal for receiving a synthetic video signal, a first C-MOS inverter, an input terminal of which is connected to the other end of the capacitor, a first resistor, one end of which is connected to the other end of the capacitor, a diode, one end of which is connected to the other end of the capacitor, and a second C-MOS inverter, an input terminal of which is connected to the other end of the diode, while an output terminal of which is connected directly or through a second resistor to the input terminal of the second C-MOS inverter, wherein when the synthetic video signal has positive characteristics, a potential at the other end of the first resistor is set to a value equal to or lower than a potential at the input terminal of the second C-MOS inverter, and when the synthetic video signal has negative characteristics, the potential at the other end of the first resistor is set to a value equal to or higher than the potential at the input terminal of the second C-MOS inverter, so as to provide a direct current bias voltage.

Synchronous separation circuit

A liquid crystal display panel is hinged on a body comprising a case provided with an electric circuit therein. On the case, a mirror is provided for watching an image on the liquid crystal display panel by the light passing through the display panel. An electroluminescence device is detachably provided in a receptacle in the case. The electroluminescence device can be positioned at a position adjacent the liquid crystal display panel so as to light the panel.

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Tokorozawa, Japan

Kiyoshi Kamiya