Computer graphics processing and selective visual display system – Plural display systems
Reexamination Certificate
1999-11-12
2003-06-24
Nguyen, Chanh (Department: 2675)
Computer graphics processing and selective visual display system
Plural display systems
C345S001300
Reexamination Certificate
active
06583771
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a multi-display type display comprising a plurality of display units. More particularly, the present invention relates to an inexpensive display controller capable of achieving enlarged display and high-definition display, a multi-display, and a multi-display system.
A prior art multi-display system is disclosed in Japanese Patent Laid-open No. Hei 10-187109. This prior art multi-display system will be described with reference to FIG.
2
.
Referring to
FIG. 2
, a monitor
201
comprises an image input unit
202
, an A/D converter
203
, a memory selector
204
, an image memory A
205
, an image memory B
206
, a selecting processing unit
207
, a D/A converter
208
, a display unit
209
, a control signal receiving unit
210
, a decoder
211
, a received control signal memory
212
, an ID setting unit
213
, a monitor system memory
214
and a monitor controller
215
.
An image transmitter
216
comprises an image output
217
, generator
218
, a control signal transmitter
219
, a control signal composing unit
220
, a synchronizer
221
, a monitor ID directory
222
, a program code generator
223
, a frame number generator
224
, a system memory
225
, a controller
226
and a monitor control program memory
227
.
Indicated at
228
is an image signal line and at
229
is a control signal line.
In operation, the image signal generator
217
of the image transmitter
216
edits video signals provided by a camera, a VTR (video tape recorder) or a PC (personal computer) to provide an analog image signal representing a still image connecting all image data to be displayed on a plurality of monitors, and the image transmitter
216
provides the analog image signal on the image signal line
228
. The control signal composing unit
220
combines data provided by the monitor ID directory
222
, the program code generator
223
, the frame number generator
224
and the monitor control program memory
227
to compose digital control signal for controlling the monitor
201
. The thus composed digital control signal is synchronized by the synchronizer
221
with image data provided by the image transmitter
216
and is transferred to the monitor
201
.
Image data transferred through the image signal line
228
operates according to the control signal transferred through the control signal line
229
. The image data is converted into corresponding digital image data by the A/D converter
203
. The digital image data is transferred through the memory selector
204
to and stored in the image memory A
205
or the image memory B
206
. The selecting processing unit
207
selects either the image memory A
205
or the image memory B
206
and reads the stored digital image memory. The D/A converter
208
converts the digital image signal into corresponding analog image signal and sends the analog image signal to the display unit
209
and the display unit
209
displays an image represented by the analog image signal.
Since a control signal including a frame number for the image data, and an ID identifying the selected monitor
201
is transmitted in synchronism with the image data transmitted by the image transmitter
216
, the image represented by the image data can be displayed on the plurality of monitors
201
.
SUMMARY OF THE INVENTION
In the prior art multi-display system, a frame number and an ID number must be assigned to each image data and hence only still images can be transmitted.
Since an ID number identifying the corresponding display must be attached to display data, troublesome processing work is necessary for processing the display data.
Since the display is not provided with any means for displaying a single display data continuously on a plurality of displays, a display data server needs to carry out operations for displaying the display data continuously on the plurality of displays.
Accordingly, it is an object of the present invention to provide an inexpensive display controller capable of achieving enlarged display and high-definition display, a display, a multi-display, and a multi-display system comprising a plurality of liquid crystal displays.
According to a first aspect of the present invention, a display controller for controlling a display comprises an input data processor for processing input display data, a control data processor that receives control data including information specifying partial display data included in the display data, a data output unit that gives the input display data to the display unit, and a control unit that controls the data output unit according to the control data so that the partial data is given to the display unit.
Preferably, in the display controller, the control unit is provided with a storage unit capable of holding identification data (ID data), and may control the data output unit so that the partial display data is given to the display unit in response to the ID data held by the storage unit and the information included in the control data.
Preferably, in the display controller, the control data includes ID data, and the control unit controls the output unit so as to give the partial display data to the display unit when the ID data included in the control data coincide with each other.
According to a second aspect of the present invention, a controller for controlling a display comprises a plurality of input data processors that receive display data, a control data processor that receives control data, a display data selector that selects one of the plurality of input data processors according to the control data, and an output unit that gives the display data selected by the display data selector to the display.
According to a third aspect of the present invention, a controller for controlling a display comprises a input data processor that receives display data, a control data processor that receives control data, an output unit that sends out the input display data, and a control unit for controlling the output unit, wherein the output unit has a display data storage unit for storing the input display data, the control unit has a storage unit capable of holding a display data input stopping command included in the control data, and the output unit is controlled so as to stop an operation for storing the display data in the display data storage unit while the display data input stopping command is held by the storage unit.
According to a fourth aspect of the present invention, each of a plurality of displays comprises a display unit that displays images, a display controller that gives display data to the display unit, wherein the display controller comprises an input data processor that receives the display data, a control data processor that receives control data and a storage unit capable of holding data on positions of the plurality of arranged displays, and the display unit is given the display data when the data held by the storage unit and the data included in the input control data coincide with each other.
According to a fifth aspect of the present invention, a multi-display comprises a plurality of display units arranged in an M×N rectangular array, and a plurality of display controllers respectively for controlling the plurality of displays, wherein each display controller has a storage unit capable of holding information indicating the position of the corresponding display unit in the M×N rectangular array.
According to a sixth aspect of the present invention, a multi-display system comprises a plurality of display units arranged in an M×N rectangular array, a plurality of display controllers respectively for controlling the display of the plurality of display units, and a controller that provides control data including information about the respective positions of the plurality of display units in the M×N rectangular array, wherein each display controller has a storage unit holding information indicating the position of the corresponding display in the M×N rectangular array.
According to a seventh aspect of the p
Furuhashi Tsutomu
Ikeda Makiko
Kamimaki Hideki
Kasai Naruhiko
Mori Tatsumi
Hitachi , Ltd.
Mattingly Stanger & Malur, P.C.
Nguyen Chanh
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