Display device having a display drive section
The invention provides a display device having, integrated on a substrate and integrally formed therewith, an active-matrix LCD section having a plurality of scanning lines and a plurality of data lines formed in a grating form corresponding to dots, and active elements according to the respective intersections to perform display control using a liquid crystal by driving the scanning lines and the data lines. The display device further including a row decoder for selecting the scanning lines, a memory cell section having memory cells that are in the number capable of storing an image signal for display control of dots in at least one row of a display drive section and allocated corresponding to the length in the row direction of the display drive section. The display device further having a column decoder section for selecting a memory cell to be stored with an inputted image signal, a column selection switch section switching on the basis of a selection by the column decoder section 51 and the image signal and storing the image signal to the memory cell selected, and a k-bit DAC section 41 for driving a data line on the basis of the image signal stored in the memory cell section.
1. A display device, comprising:
a display section having a plurality of scanning lines, a plurality of data lines and a plurality of dots corresponding to the plurality of scanning lines and the plurality of data lines, each of the plurality of dots including a display element and an active element;
a scanning line driver that drives the plurality of scanning lines;
a data line driver that drives the plurality of data lines;
a memory cell section having a plurality of memory cell groups that include the plurality of memory cells being arranged in a matrix having a plurality of rows and a plurality of columns; and
a selection switch section that controls transmission of an image signal to the plurality of memory cell groups, each of the plurality of memory cell groups including memory cells, the memory cell section being disposed between the display section and the selection switch section,
the display section, the memory cell section, and the selection switch section being formed on one substrate,
each of the plurality of memory cell groups storing first image signals supplied through the selection switch section, and
second image signals that are generated by digital to analog conversions of the first image signals stored in each of the plurality of memory cell groups being supplied to one data line of the plurality of data lines.
2. The display device according to claim 1 , the memory cell section storing image signals for one screen.
3. The display device according to claim 1 , further comprising:
a plurality of word lines among which a word line is selected when a memory cell of the plurality of memory cells receives the first image signals,
the plurality of word lines extending along a row direction that intersects a column direction along which the plurality of data lines extend.
4. The display device according to claim 1 , the number of the plurality of rows being equal to the number of the plurality of scanning lines.
5. The display device according to claim 1 , further comprising a word line driver that drives the plurality of word lines.
6. The display device according to claim 5 , the word line driver receiving an address signal that is received by the scanning line driver.
7. The display device according to claim 5 , further comprising a column decoder that selects a memory cell of the plurality of memory cells by cooperation with the word line.
8. The display device according to claim 1 , further comprising:
a DAC section having a plurality of DACs, each of the plurality of DACs receiving digital data based on the first image signals,
each of the plurality of DACs converting the digital data into analog data.
9. The display device according to claim 1 , each of the plurality of memory cells of the memory cell section being configured by any one of a dynamic memory and a static memory.
10. The display device according to claim 1 , each of the memory cell of the memory cell section rewriting data based on the first image signals without refreshing.
11. The display device according to claim 1 , only when a change of display in one dot of the plurality of dots is carried out, a memory cell of the plurality of memory cells that corresponds to the one dot receiving the first image signals.
12. The display device according to claim 1 , the memory cell section acting as a frame memory.
13. The display device according to claim 1 ,
a length of the memory cell section in a row direction that intersects a column direction along which the plurality of data lines extend being shorter than a length of the display section.
14. The display device according to claim 1 , the number of the plurality of rows of the memory cell section being equal to the number of the plurality of scanning lines.
15. The display device according to claim 1 , a gray-scale level in the display section being obtained by at least one of an area gray-scale method, time-division gray-scale method and a method combining the area gray-scale method and the time-division gray-scale method.
16. The display device according to claim 1 , further comprising:
a DAC section that includes a plurality of DAC units, each of the plurality of DAC units receiving the first image signals.
17. The display device according to claim 16 , the number of the plurality of rows of the memory cell section being more than two.
18. The display device according to claim 16 , each of the plurality of DAC units being coupled to one data line of the plurality of data lines.
19. The display device according to claim 1 , further comprising:
a sense amplifier section.
20. The display device according to claim 19 , further comprising:
a DAC section that includes a plurality of DAC units, the DAC section being disposed between the sense amplifier section and the display section.
21. The display device according to claim 1 , the memory cell section further including a memory row decoder for operating the plurality of memory cells, the memory row decoder and the scanning line driver receiving a common controlling signal.
22. The display device according to claim 1 , the substrate being a glass substrate.
23. The display device according to claim 1 , each of the plurality of memory cells being formed of TFT.