1. A top drive well drilling apparatus designed to be suspended from a travelling block in a drawworks and laterally supported by a dolly running together with the well drilling apparatus along tracks or rails attached to a derrick, said drilling apparatus comprising:
at least one driving motor, one power transmission powered by the at least one driving motor, a drive shaft driven from the power transmission and designed to be connected to a drill string, load transferring means, and a torque arresting device attached to and depending from the power transmission, wherein
a plurality of said components of the well drilling apparatus are constructed and arranged as component modules,
quick releasable connecting means detachably connect respectively adjacent individual component modules together, and
the load transferring means are in the form of a load frame module that load relieves the drive shaft and the power transmission at the same time as it forms a central component module which the other component modules are constructed around.
2. A top drive well drilling apparatus according to claim 1, wherein the load frame module carries the power transmission where the power transmission constitutes another component module which is releasable from the load frame by means of easily releasable connecting means.
3. A top drive well drilling apparatus according to claim 1, wherein the power transmission carries the at least one driving motor where each driving motor constitutes another component module which is releasable from the transmission by means of easily releasable connecting means.
4. A top drive well drilling apparatus according to claim 1, wherein the power transmission carries the torque arresting means that constitutes another component module which is releasable from the transmission by means of easily releasable connecting means.
5. A top drive well drilling apparatus according to claim 1, wherein the load frame module is in the form of a structural element omitting moving parts.
6. A top drive well drilling apparatus according to claim 1, wherein the connecting means are hydraulic operated bolts and nuts.
7. A top drive well drilling apparatus according to claim 1, wherein the connecting means are manually operated bolts and nuts.
8. A top drive well drilling apparatus according to claim 1, wherein the apparatus includes a converting module for converting signals from analogue to digital format.
9. A top drive well drilling apparatus according to claim 1, wherein the apparatus includes an elevator mechanism having an elevator for manipulation of drill pipespipe string.
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 organic light emitting display device comprising:
an organic light emitting display panel that includes a plurality of power lines, a plurality of scan lines and a plurality of data lines;
a power supplier configured to apply a reference voltage to the power lines; and
a controller configured to apply at least one control signal to the power supplier,
wherein the reference voltage is gradually varied along the distance from the power supplier.
2. The organic light emitting display device of claim 1, wherein the power supplier includes:
a reference voltage generator configured to generate a basic voltage corresponding to a direct-current voltage;
an integrator configured to integrate the basic voltage and generate the reference voltage; and
a switch configured to selectively transfer the basic voltage to the integrator.
3. The organic light emitting display device of claim 2, wherein the switch is controlled by a vertical synchronous signal applied from the controller.
4. The organic light emitting display device of claim 3, wherein the switch is turned-off in a low level interval of the vertical synchronous signal.
5. The organic light emitting display device of claim 2, further comprising a switch controller controls the switch.
6. The organic light emitting display device of claim 5, wherein the switch controller is controlled by a data enable signal applied from the controller.
7. The organic light emitting display device of claim 6, wherein the switch controller includes a counter configured to count the number of pulses of the data enable signal.
8. The organic light emitting display device of claim 6, wherein the switch is turned-off at a first rising edge of the data enable signal.
9. The organic light emitting display device of claim 1, wherein the power supplier includes a DAC (digital-to-analog converter) configured to convert a reference data from the controller into a basic voltage, the reference data is a digital signal, and the basic voltage is an analog voltage.
10. The organic light emitting display device of claim 9, wherein the power supplier further includes a buffer configured to amplify the basic voltage from the DAC and provide the amplified voltage as the reference voltage.
11. The organic light emitting display device of claim 1, wherein the power supplier includes an integrator configured to integrate a pulse voltage from the controller according to time and generate the reference voltage.
12. The organic light emitting display device of claim 11, wherein the pulse voltage is output from the controller in synchronization with the data enable signal.
13. The organic light emitting display device of claim 12, wherein the pulse voltage maintains a high level during a time interval which progresses from a first rising edge to the last falling edge of the data enable signal.