International Business Machines Corporation

Other

Hitachi, Ltd.

Au Optronics Corporation

Johji Mamiya

Kazushi Yamauchi

Takatoshi Tomooka

Masaru Suzuki

Takashi Watanabe

Kozo Nakamura

Takashi Okada

Kenji Kawabata

Hideki Hayashi

Motohiro Sugino

Ryuichi Ikeda

Hironari Nishino

Yutaka Morimoto

Yoshinori Momose

Hideaki Iida

Yoh Sugiuchi

Tsuyonobu Hatazawa

Hiroshi Tanase

Kohnji Ishii

Disclosed is a processing on a host side and a panel side, thus optimizing a work load of the whole of a system including a graphics chip. Provided is an image display system which comprises a host side for executing an application and a panel side connected to the host side, and displaying an image on the panel side, the host side transferring undeveloped image data to the panel side when an image display is requested of the panel side having a panel memory for developing the image, the panel side developing the image in the panel memory based on the image data transferred from the host side and displaying the image developed in the panel memory on the panel.

Image display system

To make it possible to execute the same application regardless of the number of connected panels even in a multi-panel environment. A host system, which transfers an image signal to a plurality of panels connected thereto, comprises: a panel ID recognition section for recognizing a panel ID of a single panel or a predetermined number of collected panels as a unit; a window ID allocation section for allocating a window ID to a window which is a transfer processing unit of the image signal; a control signal output section for outputting a control signal used for setting a window ID to be processed to the panel ID to be read out in transferring the image signal; and an image signal transfer section for adding the window ID allocated by the window ID allocation section to the image signal, thus transferring the image signal.

Host device, image display device, image display system, image display method, panel attribute reading-out method and image display control method

To achieve a transfer of image data of large capacity from a host system side to a display side and a transfer of a far small quantity of data from the display side to the host system side with the maximum efficiency. An image display method which transfers image data between a host system side executing an application and a display side displaying an image, which includes the steps of: managing image data by the host system side, which belongs to a window in accordance with a sub-area obtained by dividing a display area of the display side, the window that is a region making sense in an image space of which the application is conscious; transferring the image data as a unit of a packet to the display side via the digital I/F; developing the image data transferred in a panel memory of the display side; grasping conditions concerning a transfer error in a unit of a window; and grasping the conditions of the transfer error through a signal line by the host system side.

Image display method, image display system, host device, image display device and display interface

An image display system includes a host system for executing an application program, a display connected to this host system, and an interface for connecting the host system to the display and used to display an image on the display. This interface enables packetized data including ID information to be transferred from the host system to the display. The interface is composed of a first interface for transferring packetized data together with packet order information and a second interface for enabling less data than the capacity of the first interface to be transferred from the display to the host system together with information of a packet transfer error recognized according to the order information.

Method for displaying image, image display system, host system, image display apparatus, and interface for display

An image display system includes a host side for executing an application and transmitting image data having a P dot width in a block unit with the number of m dots as the width of the block. A panel side is connected through a digital I/F line to the host side, which converts the image data having a P dot width by using magnification to produce data having an R dot width and then displays the image data. The panel side executes scaling by using a block having an integral value obtained by a R&times;m/P set as a dot width and a block having a dot width of an added integral value obtained by adding 1 to the integral value, and converts by magnification the image data received from the host side in block unit based on the executed scaling and displays the image data on a panel.

Image display data conversion apparatus and method thereof

Planar light source device having polarization separator formed of two sheets with mating triangular prisms and different indices of refraction

A method and apparatus is provided for displaying an enlarged image on a liquid crystal display apparatus capable of displaying colors, and in particular, a liquid crystal display method and apparatus that can enlarge an image at an arbitrary ratio and display the outline of the enlarged image smoothly. On a display panel of a color liquid crystal display apparatus in which display dots each comprising an array of three subpixels displaying red (R), green (G), and blue (B) are arranged in a matrix, three pieces of raw-direction original display brightness data to be displayed in three subpixels are extended and subjected to predetermined weights of brightness to form enlarged display brightness data. This data is sequentially output to the subpixels to extend the original image in the raw direction of the display panel before display.

Method of color image enlargement in which each RGB subpixel is given a

A liquid crystal display unit using a back light uses a light guiding sheet to transfer to a liquid crystal display panel the light from a light source, and provides a liquid crystal display unit where a display of images is obtained with uniform brightness and high brightness. The light guiding sheet is formed by stacking two or more kinds of transparent amorphous layers different in refractive index at a predetermined angle with respect to a sheet surface. This light guiding sheet is constructed so as to be employed in a back light.

Light guiding sheet, manufacturing method thereof, back light using the

A current feedback type discharge lamp lighting device including a switching circuit which switches an impedance of an impedance device in accordance with the number of connected discharge tubes. In the discharge lamp lighting device, a tube current for each of the connected discharge tubes is maintained constant, and the discharge lamp lighting device tends to not be effected by stray capacitance.

Discharge lamp lighting device

To generate a dot clock for a liquid crystal display device from a horizontal sync signal with reduced skew, a phase locked loop (PLL) is divided into three functional parts. The first part generates a particular frequency by supplying voltage from a latch type DAC (digital/analog converter) to a VCO (voltage controller oscillator). A horizontal sync signal is estimated from the dot clock signal that is finally generated and the output value of the DAC is increased or decreased in accordance with the difference between this estimated horizontal sync signal and the actual horizontal sync signal. This increase or decrease correction is made at, for example, the vertical sync timing. The second part achieves synchronization. A signal corresponding to the phase error between the actual horizontal sync signal and the dot clock signal is added to the signal from the DAC to control the phase of the dot clock. The third part is a PLL for generating the dot clock in accordance with the signal generated by the first part at the particular frequency.

Dot clock generator for liquid crystal display device

Assuming that a given equation representing a quadratic curve is:

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Kanagawa-ken, Japan

Johji Mamiya