1. A method comprising:
forming a channel in a first type semiconductor portion to form a \u201cU\u201d shaped portion;
forming a dielectric material within the channel;
forming a control line over the dielectric material;
implanting a second type dopant into both top portions of the \u201cU\u201d shaped portion to form a pair of implanted regions above the control line; and
forming an upper first type semiconductor portion over one of the implanted regions.
2. The method of claim 1, wherein the first type semiconductor portion is P-doped and the second type dopant is an N-type dopant.
3. The method of claim 2, wherein implanting a second type dopant into both top portions of the \u201cU\u201d shaped portion includes heavily doping (N+) into at least one top portion of the \u201cU\u201d shaped portion.
4. The method of claim 3, wherein forming an upper first type semiconductor portion over one of the implanted regions includes forming a heavily doped (P+) portion over one of the implanted regions.
5. The method of claim 1, further including forming a first transmission line coupled to a second of the pair of implanted regions.
6. The method of claim 5, further including forming a second transmission line coupled to the upper first type semiconductor portion.
7. The method of claim 6, wherein the first and second transmission lines are formed substantially orthogonal.
8. The method of claim 6, wherein forming a second transmission line includes forming a first type semiconductor material and forming a metal cap material over the first type semiconductor material.
9. The method of claim 8, wherein forming the first type semiconductor material includes forming a heavily doped (P+) material.
10. A method comprising:
forming a conductor region beneath a first type semiconductor portion separated therefrom by a dielectric material;
forming a channel in the first type semiconductor portion to form a \u201cU\u201d shaped portion;
forming a dielectric material within the channel;
forming a control line over the dielectric material;
implanting a second type dopant into both top portions of the \u201cU\u201d shaped portion to form a pair implanted regions; and
forming an upper first type semiconductor portion over one of the implanted regions.
11. The method of claim 10, wherein forming a conductor region includes forming a metal region.
12. The method of claim 10, wherein forming the conductor region beneath the first type semiconductor portion separated therefrom by a dielectric material includes:
forming a dielectric material over a first type semiconductor substrate;
forming a conductor region over the dielectric material; and
flipping and bonding the conductor region to a second substrate.
13. The method of claim 12, wherein forming the conductor region beneath the first type semiconductor portion further includes thinning the flipped first type semiconductor substrate using an implanted marker.
14. The method of claim 12, wherein flipping and bonding the conductor region to a second substrate includes flipping and bonding the conductor region to an oxidized surface material of a silicon substrate.
15. The method of claim 12, wherein flipping and bonding the conductor region to a second substrate includes forming an amorphous silicon material over the conductor region, and flipping and bonding the amorphous silicon material to an oxidized surface material of a silicon substrate.
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 liquid crystal display device comprising:
a liquid crystal panel including a plurality of scanning lines, a plurality of data lines, and a plurality of pixel formation portions provided corresponding to the plurality of scanning lines and the plurality of data lines; and
a display control unit that controls drive of the plurality of scanning lines and the plurality of data lines,
wherein each of the pixel formation portions includes a thin film transistor having a gate terminal connected to the corresponding scanning line, and a pixel electrode connected to the corresponding data line through the thin film transistor, and
the display control unit includes:
an input unit that receives an input signal for control based on an ambient illuminance from outside; and
a drive frequency control unit that sets a drive frequency determined by a ratio between a refresh period and a pause period to a value in accordance with the ambient illuminance, based on the input signal for control, when the plurality of scanning lines and the plurality of data lines are to be driven so that the refresh period and the pause period alternately appear, the refresh period being for refreshing a screen of the liquid crystal panel, and the pause period being for pausing the refresh of the screen, the pause period being equal to or longer than the refresh period.
2. The liquid crystal display device according to claim 1, wherein
the drive frequency control unit includes:
a storage unit that prestores a plurality of types of drive frequencies, and selects the drive frequency in accordance with the ambient illuminance from the plurality of types of drive frequencies, based on the input signal for control; and
a drive control unit that controls drive timing of the plurality of scanning lines and the plurality of data lines, based on the drive frequency selected by the storage unit, when the plurality of scanning lines and the plurality of data lines are to be driven so that the refresh period and the pause period alternately appear.
3. The liquid crystal display device according to claim 2, further comprising:
a light source unit that radiates light to the liquid crystal panel; and
a light source control unit that controls the light source unit.
4. The liquid crystal display device according to claim 3, wherein the light source control unit controls a luminance of light to be radiated from the light source unit, based on a lighting control signal subjected to pulse width modulation.
5. The liquid crystal display device according to claim 4, wherein the light source control unit makes the luminance of the light to be radiated from the light source unit higher as a duty ratio of the lighting control signal is higher.
6. The liquid crystal display device according to claim 5, wherein
the display control unit further includes a lighting control signal generating unit that generates the lighting control signal, and
the lighting control signal generating unit determines the duty ratio of the lighting control signal, based on the drive frequency.
7. The liquid crystal display device according to claim 6, wherein the drive control unit controls the duty ratio of the lighting control signal to be determined by the lighting control signal generating unit.
8. The liquid crystal display device according to claim 5, wherein the drive control unit generates the lighting control signal having the duty ratio based on the drive frequency.
9. The liquid crystal display device according to claim 1, wherein the drive frequency control unit sets the drive frequency to a predetermined value, when the plurality of scanning lines and the plurality of data lines are to be driven so that the refresh period continuously appears.
10. The liquid crystal display device according to claim 1, wherein a channel layer of the thin film transistor is formed of an oxide semiconductor.
11. The liquid crystal display device according to claim 5, wherein the light source control unit receives the lighting control signal having the duty ratio based on the ambient illuminance from outside the liquid crystal display device.
12. An electronic device comprising:
the liquid crystal display device according to claim 1;
an ambient illuminance acquiring unit that acquires the ambient illuminance; and
an information processing unit that supplies to the input unit an input signal for control based on the ambient illuminance acquired by the ambient illuminance acquiring unit.
13. An electronic device comprising:
the liquid crystal display device according to claim 11;
an ambient illuminance acquiring unit that acquires the ambient illuminance; and
an information processing unit that supplies to the input unit an input signal for control based on the ambient illuminance acquired by the ambient illuminance acquiring unit, and supplies to the light source control unit a lighting control signal having a duty ratio based on the relevant ambient illuminance.
14. A method for driving a liquid crystal display device which includes a liquid crystal panel and a display control unit, the liquid crystal panel including a plurality of scanning lines, a plurality of data lines, and a plurality of pixel formation portions provided corresponding to the plurality of scanning lines and the plurality of data lines, each of the pixel formation portions including a thin film transistor having a gate terminal connected to the corresponding scanning line, and a pixel electrode connected to the corresponding data line through the thin film transistor, and the display control unit configured to control drive of the plurality of scanning lines and the plurality of data lines, the method comprising the steps of:
receiving an input signal for control based on an ambient illuminance from outside; and
setting a drive frequency determined by a ratio between a refresh period and a pause period to a value in accordance with the ambient illuminance, based on the input signal for control, when the plurality of scanning lines and the plurality of data lines are to be driven so that the refresh period and the pause period alternately appear, the refresh period being for refreshing a screen of the liquid crystal panel, and the pause period being for pausing the refresh of the screen, the pause period being equal to or longer than the refresh period.