1. A display device, comprising:
a first transistor region and a second transistor region defined on a substrate;
a first transistor disposed on the first transistor region, the first transistor comprises a first semiconductor layer having source, channel, and drain regions defined on the substrate, a first insulating film disposed on the first semiconductor layer, a first transparent electrode disposed on the first insulating film and formed corresponding to the channel region of the first semiconductor layer, and a second insulating film disposed on the first transparent electrode;
a second transistor disposed on the second transistor region, the second transistor comprises a second semiconductor layer having source, channel, and drain regions defined on the substrate, the first insulating film disposed on the second semiconductor layer, a second transparent electrode disposed on the first insulating film and formed corresponding to the channel region of the second semiconductor layer, a second gate disposed on the second transparent electrode, and a second insulating film disposed on the second gate; and
a pixel comprising an organic light emitting diode disposed on the second transistor,
wherein the first transistor is a phototransistor for sensing external light and the second transistor is a switching transistor for driving the organic light emitting diode,
wherein the first transistor adjust the luminance of the organic light emitting diode by external light.
2. a display device, comprising:
a first transistor region and a second transistor region defined on a substrate;
a first transistor disposed on the first transistor region, the first transistor comprises a first semiconductor layer having source, channel, and drain regions defined on the substrate, a first insulating film disposed on the first semiconductor layer, a first transparent electrode disposed on the first insulating film and formed corresponding to the channel region of the first semiconductor layer, and a second insulating film disposed on the first transparent electrode;
a second transistor disposed on the second transistor region, the second transistor comprises a second semiconductor layer having source, channel, and drain regions defined on the substrate, the first insulating film disposed on the second semiconductor layer, a second transparent electrode disposed on the first insulating film and formed corresponding to the channel region of the second semiconductor layer, a second gate disposed on the second transparent electrode, and a second insulating film disposed on the second gate; and
a pixel comprising a liquid crystal layer disposed on the second transistor;
wherein the first transistor is a phototransistor for sensing external light and the second transistor is a switching transistor for driving the liquid crystal layer,
wherein the first transistor adjust the luminance of a organic light emitting diode by external light.
3. The display device of claim 1,
wherein the first transistor for increasing the luminance of the pixel in a bright environment and decreasing the luminance of the pixel in a dark environment.
4. The display device of claim 1,
wherein the second transistor comprising a third insulating film disposed on the source or the drain, the third insulating film exposing the source or the drain.
5. The display device of claim 1,
wherein the organic light emitting diode comprises a lower electrode disposed on the third insulating film, the lower electrode contacting the source or drain, an organic light emitting layer disposed on the lower electrode, and an upper electrode disposed on the organic light emitting layer.
6. The display device of claim 2,
wherein the first transistor for increasing the luminance of the pixel in a bright environment and decreasing the luminance of the pixel in a dark environment.
7. The display device of claim 2,
wherein the second transistor comprising a third insulating film disposed on the source or the drain, the third insulating film exposing the source or the drain.
8. The display device of claim 7,
further comprises a pixel electrode disposed on the third insulating film,
a common electrode connected to a common voltage line,
a second substrate facing the first substrate comprising a black matrix disposed on the second substrate and a color filter disposed between the black matrix.
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. An electromagnetic contactor, comprising:
an upper frame having a fixed contact point and a guide rail;
a cross bar comprising a sliding portion sliding on the guide rail, a movable contact point contacting and separating with respect to the fixed contact point while sliding along the guide rail, and a movable core; and
a lower frame comprising a fixed core disposed adjacent to the movable core, an excitation coil magnetizing the fixed core by an electromotive force, and a return spring exerting an elastic force to the cross bar,
wherein the sliding portion is configured separately from the cross bar, and a material forming the sliding portion has a friction coefficient against the guide rail less than that of the cross bar.
2. The electromagnetic contactor of claim 1, wherein the sliding portion has a block form extending from a side of the cross bar in a sliding direction.
3. The electromagnetic contactor of claim 2, wherein both ends of the contact surface of the sliding portion adjoining the guide rail are rounded.
4. The electromagnetic contactor of claim 1, wherein the sliding portion is made of a stainless material.
5. The electromagnetic contactor of claim 1, wherein the sliding portion comprises a body portion and a contact portion protruded to a side of the guide rail from the body portion.
6. The electromagnetic contactor of claim 5, wherein the body portion comprises two or more contact portions with respect to a side of the guide rail.
7. The electromagnetic contactor of claim 1, wherein the sliding portion formed of a plate, which surrounds part of the cross bar.
8. An electromagnetic contactor, comprising:
a frame having a guide rail thereinside;
a cross bar having a movable contact point, which slides along the guide rail;
a fixed contact point contacting or separating with respect to the movable contact point; and
an actuator moving the cross bar to a side of the fixed contact point,
wherein the cross bar additionally comprises a sliding portion adjoining the guide rail, and a friction coefficient between the sliding portion and the guide rail is less than a friction coefficient between the cross bar and the guide rail.
9. The electromagnetic contactor of claim 8, wherein the actuator comprises,
a movable core mounted at the cross bar;
a fixed core mounted at the frame; and
an excitation coil magnetizing the fixed core by an electromotive force.
10. An electromagnetic contactor, comprising:
an upper frame having a fixed contact point and a holder;
a cross bar comprising a guide portion slidably fixed at an inner side of the holder, a movable contact point contacting and separating with respect to the fixed contact point while sliding, and a movable core; and
a lower frame comprising a fixed core disposed adjacent to the movable core, an excitation coil magnetizing the fixed core by an electromotive force, and a return spring exerting an elastic force to the cross bar,
wherein a friction coefficient between the guide portion and the holder is less than a friction coefficient between the cross bar and the upper frame.
11. The electromagnetic contactor of claim 10, wherein a through hole is formed at an inner side of the holder, and the guide portion is inserted and fixed within the through hole.
12. The electromagnetic contactor of claim 10, wherein the holder is made of a stainless material.