1-24. (canceled)
25. A display device comprising:
a plurality of pixels;
a plurality of source signal lines electrically connected to the plurality of pixels;
a source driver electrically connected to the plurality of source signal lines, wherein the source driver includes a shift register, an image signal input line configured to input a video signal, a wiring configured to input a control signal, a plurality of first switches, a plurality of second switches, and a plurality of third switches,
wherein each of the plurality of third switches includes a control terminal and is configured to turn on or off in accordance with a signal input to the control terminal,
wherein the control terminal of each of the plurality of third switches is connectable to an output terminal of the shift register through a corresponding one of the plurality of first switches and is also connectable to a power source through a corresponding one of the plurality of second switches,
wherein the image signal input line is connectable to the plurality of source signal lines through the plurality of third switches,
wherein the wiring is electrically connected to a control terminal of each of the plurality of first switches and a control terminal of each of the plurality of second switches so that when the plurality of first switches is turned on, the plurality of second switches is turned off, and when the plurality of first switches is turned off, the plurality of second switches is turned on.
26. The display device according to claim 25, further comprising a control circuit for outputting the control signal, the control circuit comprising a determination circuit for determining whether or not video signals corresponding to all of pixels in one row of the plurality of pixels are equal to one another.
27. The display device according to claim 25, wherein in a case where all of signals corresponding to all of the plurality of pixels in one row of the plurality of pixels are equal to one another, and the plurality of first switches is turned off, the plurality of second switches is turned on.
28. The display device according to claim 25, wherein, in a case where video signals corresponding to at least two pixels of the video signals corresponding to the plurality of pixels in one row of the plurality of pixels are different from each other, the plurality of first switches is turned on, and the plurality of second switches is turned off.
29. The display device according to claim 25, wherein the wiring is electrically connected to the control terminal of each of the plurality of second switches through an inverter.
30. The display device according to claim 25, wherein each of the plurality of first switches and the second switch are digital switches, and wherein each of the plurality of third switches is an analog switch.
31. The display device according to claim 25, wherein the display device is a liquid crystal display.
32. The display device according to claim 25, wherein the display device is an EL display.
33. The display device according to claim 25, wherein each of the plurality of pixels comprises a thin film transistor, the thin film transistor using a compound semiconductor including indium, gallium, zinc and oxygen.
34. A display device comprising:
a plurality of pixels;
a plurality of source signal lines electrically connected to the plurality of pixels;
a source driver electrically connected to the plurality of source signal lines; and
wherein the source driver includes a shift register, an image signal input line configured to input a video signal, a plurality of first switches, a plurality of second switches, and a plurality of third switches,
wherein each of the plurality of third switches includes a control terminal and is configured to turn on or off in accordance with a signal input to the control terminal,
wherein the control terminal of each of the plurality of third switches is connectable to an output terminal of the shift register through a corresponding one of the plurality of first switches and is also connectable to power source through the plurality of second switches,
wherein the image signal input line is connectable to the plurality of source signal lines through the plurality of third switches,
wherein the plurality of first switches and the plurality of second switches are selectively turned on or off in accordance with a control signal input to the source driver, when the plurality of first switches is turned on, the plurality of second switches is turned off, and when the plurality of first switches is turned off, the plurality of second switches is turned on, and
wherein in a case where all of signals corresponding to all of the plurality of pixels in one row of the plurality of pixels are equal to one another, input of a start pulse to the shift register is stopped.
35. The display device according to claim 34, further comprising a control circuit for outputting the control signal, the control circuit comprising a determination circuit for determining whether or not video signals corresponding to all of pixels in one row of the plurality of pixels are equal to one another.
36. The display device according to claim 34, wherein in a case where all of signals corresponding to all of the plurality of pixels in one row of the plurality of pixels are equal to one another, and the plurality of first switches is turned off, the plurality of second switches is turned on.
37. The display device according to claim 34, wherein, in a case where video signals corresponding to at least two pixels of the video signals corresponding to the plurality of pixels in one row of the plurality of pixels are different from each other, the plurality of first switches is turned on, and the plurality of second switches is turned off.
38. The display device according to claim 34, wherein each of the plurality of first switches and the plurality of second switches are digital switches, and wherein each of the plurality of third switches is an analog switch.
39. The display device according to claim 34, wherein the display device is a liquid crystal display.
40. The display device according to claim 34, wherein the display device is an EL display.
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 press die for forming a boss on a workpiece comprising:
a die with a burring hole formed therein; and
a burring punch having a shape adapted to be inserted into the burring hole,
wherein a clearance which is formed between the burring hole and the burring punch when the burring punch is inserted into the burring hole, is in a range not less than 60% and not more than 115% of a thickness of the workpiece before the workpiece goes through a burring process.
2. A burring method for forming a boss on a workpiece comprising the steps of:
fixing the workpiece on a die with a burring hole formed therein; and
pressing a burring punch from a direction opposite to a contact surface of the workpiece on which the workpiece is in contact with the die, through the workpiece into the burring hole of the die,
wherein a width of a clearance, which is formed between the burring hole and the burring punch when the burring punch is inserted into the burring hole, is in a range not less than 60% and not more than 115% of a thickness of the workpiece, before the workpiece goes through a burring process.
3. A method of manufacturing a pressed product having a planar part and at least one boss formed on the planar part, and obtained by burring a workpiece using a press die including: a die with a burring hole formed therein; and a burring punch having a shape adapted to be inserted into the burring hole, the method comprising the steps of:
fixing the workpiece on the die; and
pressing the burring punch from a direction opposite to a contact surface of the workpiece on which the workpiece is in contact with the die, through the workpiece into the burring hole of the die,
wherein a width of a clearance, which is formed between the burring hole and the burring punch when the burring punch is inserted into the burring hole, is in a range not less than 60% and not more than 115% of a thickness of the workpiece, before the workpiece goes through a burring process.
4. A pressed product having a planar part and at least one boss formed on the planar part, and obtained by burring a workpiece using a press die including: a die with a burring hole formed therein; and a burring punch having a shape adapted to be inserted into the burring hole,
wherein a thickness of the boss is in a range not less than 70% and not more than 115% before the workpiece goes through a burring process.
5. The pressed product according to claim 4, wherein a thickness of the workpiece is 0.5 mm or less before the workpiece goes through a burring process.
6. The press die according to claim 1, wherein the clearance between the burring hole and the burring punch is in a range not less than 65% and not more than 100% of the thickness of the workpiece before the workpiece goes through the burring process.
7. The burring method according to claim 2, wherein the clearance between the burring hole and the burring punch is in a range not less than 65% and not more than 100% of the thickness of the workpiece before the workpiece goes through the burring process.
8. The method of manufacturing a pressed product according to claim 3, wherein the clearance between the burring hole and the burring punch is in a range not less than 65% and not more than 100% of the thickness of the workpiece before the workpiece goes through the burring process.
9. The press die according to claim 1, wherein the clearance between the burring hole and the burring punch is in a range not less than 75% and not more than 95% of the thickness of the workpiece before the workpiece goes through the burring process.
10. The burring method according to claim 2, wherein the clearance between the burring hole and the burring punch is in a range not less than 75% and not more than 95% of the thickness of the workpiece before the workpiece goes through the burring process.
11. The method of manufacturing a pressed product according to claim 3, wherein the clearance between the burring hole and the burring punch is in a range not less than 75% and not more than 95% of the thickness of the workpiece before the workpiece goes through the burring process.
12. The pressed product according to claim 4, wherein the thickness of the workpiece is 0.3 mm or less before the workpiece goes through the burring process.
13. The pressed product according to claim 4, wherein the thickness of the workpiece is 0.25 mm or less before the workpiece goes through the burring process.
14. The pressed product according to claim 4, wherein the thickness of the boss is preferably in a range between 75% and 100% before the workpiece goes through the burring process.
15. The pressed product according to claim 4, wherein the thickness of the boss is in a range between 86% and 9.7% before the workpiece goes through the burring process.
16. The pressed product according to claim 4, wherein the boss is formed at an angle in a range not less than 85 degrees and not more than 95 degrees with respect to the planar part.
17. The pressed product according to claim 5, wherein the boss is formed at an angle in a range not less than 85 degrees and not more than 95 degrees with respect to the planar part.
18. The pressed product according to claim 4, wherein the planar part has a flatness of not more than 9% with respect to a distance between the boss and an outer circumference of the planar part.
19. The pressed product according to claim 5, wherein the planar part has a flatness of not more than 9% with respect to a distance between the boss and an outer circumference of the planar part.
20. The press die according to claim 1, wherein a protruding part formed on an inner circumferential edge of an upper surface of the die, and surrounding the burring hole has a width in a range between 50% and 400% of the thickness of the workpiece; and has a height in a range between 5% and 20% of the thickness of the workpiece.
21. The burring method according to claim 2, wherein a protruding part formed on an inner circumferential edge of an upper surface of the die, and surrounding the burring hole has a width in a range between 50% and 400% of the thickness of the workpiece; and has a height in a range between 5% and 20% of the thickness of the workpiece.
22. The method of manufacturing a pressed product according to claim 3, wherein a protruding part formed on an inner circumferential edge of an upper surface of the die, and surrounding the burring hole has a width in a range between 50% and 400% of the thickness of the workpiece; and has a height in a range between 5% and 20% of the thickness of the workpiece.
23. The pressed product according to claim 4, wherein a protruding part formed on an inner circumferential edge of an upper surface of the die, and surrounding the burring hole has a width in a range between 50% and 400% of the thickness of the workpiece; and has a height in a range between 5% and 20% of the thickness of the workpiece.
24. The press die according to claim 1, wherein a protruding part formed on an inner circumferential edge of an upper surface of the die, and surrounding the burring hole has a width in a range between 150% and 300% of the thickness of the workpiece; and has a height in a range between 5% and 20% of the thickness of the workpiece.
25. The burring method according to claim 2, wherein a protruding part formed on an inner circumferential edge of an upper surface of the die, and surrounding the burring hole has a width in a range between 150% and 300% of the thickness of the workpiece; and has a height in a range between 5% and 20% of the thickness of the workpiece.
26. The method of manufacturing a pressed product according to claim 3, wherein a protruding part formed on an inner circumferential edge of an upper surface of the die, and surrounding the burring hole has a width in a range between 150% and 300% of the thickness of the workpiece; and has a height in a range between 5% and 20% of the thickness of the workpiece.
27. The pressed product according to claim 4, wherein a protruding part formed on an inner circumferential edge of an upper surface of the die, and surrounding the burring hole has a width in a range between 150% and 300% of the thickness of the workpiece; and has a height in a range between 5% and 20% of the thickness of the workpiece.
28. The press die according to claim 1, wherein the workpiece is made of any one of aluminum, stainless steel SUS304-SP, and stainless steel SUS304-CSP.
29. The burring method according to claim 2, wherein the workpiece is made of any one of aluminum, stainless steel SUS304-SP, and stainless steel SUS304-CSP.
30. The method of manufacturing a pressed product according to claim 3, wherein the workpiece is made of any one of aluminum, stainless steel SUS304-SP, and stainless steel SUS304-CSP.
31. The pressed product according to claim 4, wherein the workpiece is made of any one of aluminum, stainless steel SUS304-SP, and stainless steel SUS304-CSP.
32. The pressed product according to claim 5, wherein the workpiece is made of any one of aluminum, stainless steel SUS304-SP, and stainless steel SUS304-CSP.
33. The pressed product according to claim 4, wherein the pressed product is a component of a cartridge for accommodating a magnetic medium.
34. The pressed product according to claim 5, wherein the pressed product is a component of a cartridge for accommodating a magnetic medium.