-17-
`
`What is claimed is:
`
`1.
`
`An image display device having plural data lines for
`
`transferring image data, plural scanning lines arrayed to
`
`intersect the plural data lines, and plural pixels
`
`correspondingto each of the points where the plural data lines
`
`and plural scanning lines intersect in a display area for
`
`displaying an image,
`
`the image display device comprising:
`
`a first memory storing a first image data in an area
`
`outside the display area on a substrate where the displayarea
`
`10
`
`is provided; and
`
`a driver outputting a second image data different from
`
`the first image data to the plural data lines,
`
`wherein an image data on the plural data lines is
`
`selectable for each data line from the first image data stored
`
`15
`
`in the first memory, or the second image data supplied from the
`
`driver, and
`
`wherein both of the selected first image data and the
`
`selected second image data are sent to the plural data lines
`
`in a period in which one of the plural scanning lines is
`
`20
`
`selected.
`
`2.
`
`The image display device according to claim 1,
`
`further
`
`comprising:
`
`plural first switches selecting whether or not to send
`
`25
`
`the first image data on the plural data lines; and
`
`
`
`What is claimed is:
`
`1.
`
`An image display device having plural data lines for
`
`transferring image data, plural scanning lines arrayed to
`
`intersect the plural data lines, and plural pixels
`
`correspondingto each of the points where the plural data lines
`
`and plural scanning lines intersect in a display area for
`
`displaying an image,
`
`the image display device comprising:
`
`a first memory storing a first image data in an area
`
`outside the display area on a substrate where the displayarea
`
`10
`
`is provided; and
`
`a driver outputting a second image data different from
`
`the first image data to the plural data lines,
`
`wherein an image data on the plural data lines is
`
`selectable for each data line from the first image data stored
`
`15
`
`in the first memory, or the second image data supplied from the
`
`driver, and
`
`wherein both of the selected first image data and the
`
`selected second image data are sent to the plural data lines
`
`in a period in which one of the plural scanning lines is
`
`20
`
`selected.
`
`2.
`
`The image display device according to claim 1,
`
`further
`
`comprising:
`
`plural first switches selecting whether or not to send
`
`25
`
`the first image data on the plural data lines; and
`
`
`
`~18-
`
`plural second switches selecting whether or not to send
`
`the second image data on the plural data lines,
`
`wherein the plural first switches include a first switch
`
`group operated by a same first control signal, and
`
`wherein the plural second switches include a second
`
`switch group operated by a same second control signal.
`
`3.
`
`The image display device according to claim 2, wherein
`
`in the period in which one of the plural scanning lines
`
`10
`
`is selected,
`
`the first image data stored in the first memory is
`
`sent to a part of the plural data lines by setting some of the
`
`first switches to an on state, and
`
`the second image data is sent to another part of
`
`15
`
`the plural data lines which are not sent the first image data
`
`by setting some of the second switches to anon state for sending
`
`the second image data to a data line where the first image data
`
`is not sent.
`
`20
`
`4.
`
`The image display device according to claim 2, wherein
`
`in the period in which one of the plural scanning lines
`
`is selected,
`
`the plural second switches are all set to an off
`
`state during setting of all the plural first switches to an on
`
`
`
`-19-
`
`state so that the first image data is sent on the plural data
`
`lines, and
`
`a part of the plural second switches are set to an
`
`on state after setting of all the plural first switches to an
`
`off state so that the second image data is sent on a part of
`
`the plural data lines.
`
`5. An image display device according to claims 1, wherein the
`
`first image data is static image data, and the second image data
`
`10
`
`is moving image data.
`
`6. An image display device according to claim 1, wherein the
`
`first memory is DRAM.
`
`15
`
`7. An image display device according to claim 1, wherein the
`
`first memory is SRAM.
`
`8. An image display device according to claim 1, wherein the
`
`first memory includes a thin film transistor.
`
`9. An image display device according to claim 1, wherein the
`
`driver includes a digital/analog converter unit converting
`
`distal image signals to analog image signals and outputting the
`
`analog image signals as the second image data.
`
`20
`
`25
`
`
`
`-20-
`
`10. A display device comprising:
`
`a panel section formed on a substrate and including a
`
`plurality of scanning lines, a plurality of data lines across
`
`the plurality of scanning lines, a plurality of pixels provided
`
`at the intersections of the plurality of data lines and the
`
`plurality of scanning lines, a first memory coupled to the
`
`plurality of data lines and storing a first image data; and
`
`a driver connected to the panel section and outputting
`
`a second image data different from the first image data to the
`
`panel section,
`
`wherein while one of the plural scanning lines is
`
`selected, a first part of the plurality of data lines is
`
`supplied the first image data from the first memoryand a second
`
`part of the plurality of data lines different from the first
`
`part of the plurality of data lines is supplied the second image
`
`data from the driver.
`
`11. The display device according to claim 10,
`
`20
`
`wherein the panel section further includes first
`
`switches between the first memory and the plurality of
`
`piurality of data lines and second switches between the driver
`
`and the plurality of data lines,
`
`the first switches
`
`transferring the first data from the first memory to the
`
`25
`
`plurality of data lines and the second switches transferring
`
`
`
`-21-
`
`the second data from the driver to the pluralityof data lines,
`
`and
`
`wherein the first data and the second data are provided
`
`to the plurality of data lines by selecting both of the first
`
`and second switches while one of the plurality of scanning line
`
`is selected.
`
`12. The display device according to claim 11,
`
`wherein the first image data is supplied to the first and
`
`10
`
`secondparts of the plurality of data lines and then the second
`
`image data is supplied to the second part of the plurality of
`
`data lines while one of the plurality of scanning lines is
`
`selected.
`
`13. The display device according to claim 10,
`
`wherein the panel section further includes
`
`a digital-analog converter coupled to the
`
`plurality of data lines,
`
`a latch circuit coupled to the digital-analog
`
`20
`
`converter,
`
`first switches between the first memory and the
`
`latch circuit, and
`
`second switches between the driver and the latch
`
`circuit,
`
`
`
`-22-
`
`wherein the latch circuittakes in the second data from
`
`the driver and does not take in the first data from the first
`
`memory when the display device displays an image based on an
`
`image data combiningthe second image data with the first image
`
`data.
`
`14. The display device according to claim 10,
`
`wherein the first image data is a static image data and
`
`the second image data is a moving image data.
`
`15. A display device comprising:
`
`a panel section formed on a substrate and including:
`
`a display area which has a plurality of scanning
`
`lines, a plurality of data lines across the plurality of
`
`scanning lines, and the plurality of pixels provided at the
`
`intersection of the pluralitydata lines, and the pluralityof
`
`the scanning lines,
`
`a first memory provided at the outside of the
`
`display area and storing a first image data,
`
`20
`
`a plurality of first switches coupled between the
`
`first memory and the plurality of data lines and outputting the
`
`first image data to the plurality of data lines, and
`
`a plurality of second switches coupled to the
`plurality of data lines and outputting a second image data
`
`25
`
`different from the first image data; and
`
`
`
`-23-
`
`a driver coupled to the panel section and outputting the
`
`second image data to the plurality of second switches,
`wherein each of the plurality of data lines is coupled
`
`to one of the plurality of first switches and one of
`
`the
`
`plurality of second switches.
`
`16. The display device according to claim 15,
`
`wherein while one of the plurality of scanning lines is
`
`selected,
`
`the driver selects the first switch or the second
`
`switch for each data line.
`
`17. The display device according to claim 15,
`
`wherein while one of the plurality of scanning lines is
`
`selected,
`
`the driver selects the plurality of first switches
`
`and then selects a part of the plurality of second switches
`
`after turning off the plurality of first switches.
`
`18. The display device according to claim 15,
`
`wherein the first image data is a static image data and
`
`20
`
`the second image data is a moving image data.
`
`
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