Nec Corporation

Cyber Laser Inc.

Susumu Tsujikawa

Masao Imai

Fujio Okumura

Yukio Ogura

Tetsumi Sumiyoshi

Yoshio Otani

A method for removing and modifying a protrusion by using a short pulse laser is provided for modifying a color filter. In a color filter modifying method, a transparent substrate () is scanned with a beam in a parallel direction, while irradiating a protrusion () generated on the color filters (---) formed on a transparent substrate () with a beam collected by a high NA condensing lens (), and a protrusion () is removed or modified.

Substrate manufacturing method including protrusion removing step

In a projection type color liquid crystal display apparatus, a polarization conversion section receives a luminous flux from a light source to convert the luminous flux into a unified luminous flux having a single linearly-polarized direction. A color separation section receives the unified luminous flux to selectively reflect a plurality of color components of the unified luminous flux individually at different angles. Convex lenses of a microlens array converge the reflected color components into different pixels of a liquid crystal element.

Projection type color liquid crystal display apparatus capable of enhancing optical utilization efficiency

In a single panel color projection LCD, white light emitted from a light source is optically processed by an optical processing unit so as to convert three primary color beams obtained from the white light into predetermined polarized beams. All of the predetermined polarized beams may be P-polarized beams or S-polarized beams. Thereafter, the optical processing unit irradiates only the predetermined polarized beams onto the liquid crystal panel without an optical power loss. A color image which is given by the liquid crystal panel is projected onto a screen to be displayed in an enlarged form.

Single panel color projection LCD having a plurality of reflectors

A projection color liquid crystal display apparatus includes a light source, and a light separator to which light emitted from the light source is inputted. The light separator separates the light inputted thereto into color lights of the three primary colors of red, green and blue, converts each of the color lights into one of p-polarized light and s-polarized light and outputs the polarized lights. In a light path of the light outputted from the light separator, a liquid crystal display element having a plurality of pixels arranged corresponding to the individual color lights obtained by the color separation of the light separator and a projection lens for projecting the light outputted from the liquid crystal display element to a screen are disposed.

Projection color liquid crystal display apparatus

An optically addressed liquid crystal light valve includes a first substrate on which a plurality of liquid crystal driving circuits are formed, a second substrate provided with a transparent electrode, and a ferroelectric liquid crystal sandwiched between the two substrates. Each liquid crystal driving circuit includes a plurality of photodetectors and a logic circuit. An optical logic device includes an optically addressed liquid crystal light valve explained above and a plurality of masks for selectively transmit a plurality of lights. The masks may be replaced by a wavelength selecting filter including a plurality of regions each transmit a light having a specific wavelength to a corresponding photodetector of the light valve.

Optically addressed liquid crystal light valve and optical logic device

An optically-addressed liquid crystal light valve comprises a transparent insulating substrate having either one-dimensional or two-dimensional arrays of optical switching elements thereon which can perform switching with an incident light, another opposing transparent substrate having transparent electrodes and a liquid crystal sandwiched therebetween. Each of the light switching elements comprises a photo-detector circuit and a thin-film-transistor (TFT) drive circuit. The photo-detector circuit comprises a serially connected photodiode and a passive element such as capacitor or resistor. The TFT drive circuit receives as input the voltage produced from the photo-detector circuit, while the output voltage from the TFT drive circuit is applied to one pixel electrode for the liquid crystal.

Growing community of inventors

Tokyo, Japan

Susumu Tsujikawa