1. A liquid crystal display device comprising:
a liquid crystal panel including plural gate lines to select a pixel and plural data lines to supply pixel data, and
a data driver dividing a single frame into plural fields and converting frame data into field data to supply the field data to the data line,
wherein when the frame data has a tone change, said data driver performs correction to data of an odd-number field of the frame in a same direction as an increasedecrease direction of the tone change of the frame data, and performs correction to data of an even-number field of the frame in an opposite direction to the increasedecrease direction of the tone change of the frame data.
2. A liquid crystal display device comprising:
a liquid crystal panel including plural gate lines to select a pixel and plural data lines to supply pixel data, and
a data driver dividing a single frame into plural fields and converting frame data into field data to supply the field data to the data line,
wherein, of the plural fields, a field on a higher luminance side is shorter than the other field(s) in terms of time.
3. The liquid crystal display device according to claim 2,
wherein the single frame is divided into two fields and when a frame tire is defined as T, the time of the field on the higher luminance side is defined as L, a response time from 10% to 90% of a finally achieved luminance when a change is made from a black display to a white display is defined as \u03c41, and a response time from 10% to 90% of a finally achieved luminance when a change is made from the white display to the black display is defined as \u03c42, a time proportion of the fields is set to meet an inequality shown below:
0.15\xd7T<L2(2.5\xd7\u03c41)+\u03c42(2\xd7\u03c41)\xd7L<0.25\xd7T
4. A liquid crystal display device comprising:
a liquid crystal panel including plural gate lines to select a pixel and plural data lines to supply pixel data, and
a back light to emit light to said liquid crystal panel; and
a data driver dividing a single frame into plural fields and converting frame data into field data to supply the field data to the data line,
wherein said back light repeats a light state and a dark state by turns at a same frequency as a frame frequency.
5. The liquid crystal display device according to claim 4,
wherein said back light is divided into plural blocks in a direction of a line, and in each block, with respect to a pixel at a center portion of each block, said back light becomes a light state in a period around an end time of the field of a highest tone among the plural fields.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A remote copy system comprising:
a first storage system coupled to an information processing apparatus, the first storage system including a first storage area in which the data from the information processing apparatus is written; and
a second storage system coupled to the first storage system, the second storage system including a virtual volume defined by a logical address to be a write destination of data sent from the first storage system, the second storage system having a second storage area in which data for that logical address and update information concerning the data are written, and
wherein data from the first storage system to be written in the logical volume of the second storage system, is written in the second storage area together with the update information of the data, instead of being written to an area indicated by the logical address.
2. A remote copy system according to claim 1 wherein the second storage area has a smaller storage capacity than the first storage area.
3. A remote copy system comprising:
a first storage system having a first storage control unit for controlling data writing in a first logical volume with reference to a first shared memory; and
a second storage system having a second storage control unit for controlling data writing in a second logical volume with reference to a second shared memory, wherein
the remote copy system stores pair information defining a correspondence relationship between the first logical volume and the second logical volume, in the first shared memory, and information, which, when data is written in the second logical volume, defines a journal volume storing the data and update information of the data, in the second shared memory;
when first data is written in the first logical volume, the first storage system issues a write instruction for the first data to the second storage control unit with the second logical volume as an object of writing on the basis of the pair information in the first shared memory, and
when a write instruction to write data in the second logical volume is received from the first storage system, with reference to the second shared memory, the second storage system does not write the first data in the second logical volume, but instead writes the first data and update information of the first data in the journal volume if an area defined as the second logical volume is defined as a logical volume area other than the second logical volume, and writes the first data in the second logical volume if the area defined as the second logical volume is not defined as a logical volume other than the second logical volume.
4. A storage system comprising:
plural storage devices; and
a storage control unit that receives a write instruction for data from an information processing apparatus and controls writing of the data in the storage devices;
wherein the storage system has a shared memory that stores information for defining logical volumes on the storage devices as configuration information, and
an area on the storage device in a first logical volume defined by the shared memory and an area on the storage device in a second logical volume defined by the shared memory are defined such that at least parts of the areas have overlapping addresses.
5. A remote copy system comprising:
a first storage system coupled to an information processing apparatus; and
a second storage system coupled to the first storage system to receive data from the first storage system;
wherein the first storage system has a first storage area in which the data sent from the information processing apparatus is written;
the second storage system has a logical address for a write destination of the data sent from the first storage system, and also has a second storage area in which data and update information, which should be written to the logical address, and when a storage area is allocated to the logical address, the data is written in the storage area, and the data and the update information is written in a second storage area, and
when a storage area is not allocated to the logical address, the data and the update information is written in the second storage area.
6. The remote copy system according to claim 5, wherein the second storage area has a smaller capacity than the first storage area.
7. A remote copy system comprising:
a first storage system coupled to an information processing apparatus and sends and receives data to and from the information processing apparatus;
a second storage system coupled to the first storage system and receives data from the first storage system; and
a third storage system coupled to the second storage system and receives data from the second storage system;
wherein the first storage system has a first storage area in which the data sent from the information processing apparatus is written,
the second storage system has a logical address to be a write destination of the data sent from the first storage system, and also has a second storage area in which data, which should be written in the logical address, and update information concerning the data are written, and when a storage area is allocated to the logical address, the data is written in the storage area, and the data and the update information is written in a second storage area;
when a storage area is not allocated to the logical address, the data and the update information is written in the second storage area;
the third storage system has a third storage area in which the data read out from the second storage area in the second storage system and update information concerning the data are stored, and a fourth storage area that is a copy destination of the first storage area; and
the data and the update information, which are stored in the second storage area, are read out from the third storage system and written in the third storage area after a predetermined time elapses, and thereafter the second storage area can be opened and is used for new storage.
8. A remote copy system according to claim 7 wherein each of the second and the third storage areas have a smaller storage capacity than either of the first and the fourth storage areas.
9. A remote copy system comprising:
a first storage system coupled to a first information processing apparatus to send data to and receive data from the first information processing apparatus;
a second storage system coupled to a second information processing apparatus and coupled to the first storage system to send data to and receive data from the second information processing apparatus, and to receive data from the first storage system; and
a third storage system coupled to the second storage system to receive data from the second storage system;
wherein the first storage system includes a first storage area in which the data sent from the information processing apparatus is written;
the second storage system includes a logical address as a write destination of data sent from the first storage system, and includes a second storage area in which data targeted for the logical address, and update information concerning the data, are written;
the third storage system includes a third storage area in which data received from the second storage area in the second storage system and update information concerning that data are stored, and includes a fourth storage area that is a copy destination of the first storage area; and
data sent from the first storage system so as to be written to the logical address in the second storage system, is written in the second storage area together with update information, and a storage area for sending and receiving data to and from the second information processing apparatus is allocated to the logical address, and the data and the update information to be stored in the second storage area are read out from the third storage system and written in the third storage area, and thereafter the second storage area can be opened and used for additional storage.
10. A remote copy system according to claim 9, wherein the second and the third storage areas are smaller than the first and the fourth storage areas.