1. An organic light emitting diode display device, comprising:
a pixel region defined by a gate line and a data line and including an emitting area and a transparent area;
at least one driving element disposed in the emitting area;
a power line overlapping the emitting area and the transparent area and connected to the at least one driving element;
a first capacitor electrode disposed in the emitting area and overlapping the power line, wherein the power line and the first capacitor electrode form a first storage capacitor, and wherein a width of a portion of the power line overlapping the first capacitor electrode is equal to a width of a portion of the power line overlapping, the transparent area; and
a second capacitor electrode disposed in the emitting area and overlapping the first capacitor electrode, wherein the first capacitor electrode and the second capacitor electrode form a second storage capacitor.
2. The organic light emitting diode display device of claim 1, wherein the first storage capacitor and the second storage capacitor are connected to the at least one driving element in parallel.
3. The organic light emitting diode display device of claim 1, wherein the at least one driving element includes a plurality of conductive layers, and
wherein the first capacitor electrode is formed of the same layer and a same material as a first layer of the plurality of conductive layers, and the second capacitor electrode is formed of the same layer and a same material, as a second layer of the plurality of conductive layers.
4. The organic light emitting diode display device of claim 1, wherein the emitting area is disposed at a side of the transparent area.
5. The organic light emitting diode display device of claim 1, wherein the transparent area surrounds the emitting area.
6. The organic light emitting diode display device of claim 1, wherein power line is formed to be parallel to the data line.
7. The organic light emitting diode display device of claim 1, wherein the emitting area is disposed at a region adjacent to the gate line and the data line.
8. The organic light emitting diode display device of claim 1, wherein the power line is disposed adjacent to the data line.
9. The organic light emitting diode display device of claim 8, wherein a distance between the data line and the power line is smaller than a short side of the emitting area.
10. The organic light emitting diode display device of claim 1, wherein the at least one driving element includes a driving thin film transistor.
11. The organic light emitting diode display device of claim 10, wherein the first capacitor electrode is formed of the same layer and the same material as a gate electrode of the driving thin film transistor, and the second capacitor electrode is formed of the same layer and the same material as source and drain regions of the driving thin film transistor.
12. The organic light emitting diode display device of claim 10, wherein the first capacitor electrode is formed of the same layer and the same material as source and drain electrodes of the driving thin film transistor, and the second capacitor electrode is formed of the same layer and the same material as a gate electrode of the driving thin film transistor.
13. The organic light emitting diode display device of claim 1, wherein the power line is formed of the same layer and the same material as source and drain electrodes of a driving thin film transistor.
14. The organic light emitting diode display device of claim 1, wherein the power line is formed of the same layer and the same material as an electrode of a light emitting diode disposed in the emitting area.
15. The organic light emitting diode display device of claim 1, further comprising:
a light emitting diode disposed in the emitting area and connected to the at least one driving element.
16. The organic light emitting diode display device of claim 15, wherein an area of the light emitting diode is equal to or smaller than the emitting area.
17. The organic light emitting diode display device of claim 15, further comprising:
a contact hole for connecting the light emitting diode and the at least one driving element,
wherein the contact hole is disposed at an edge portion of the pixel region.
18. The organic light emitting diode display device of claim 1, wherein the power line is above both the first and second capacitor electrodes, and the first capacitor electrode is above the second capacitor electrode.
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 image forming apparatus comprising:
a fixing section having a heater and being configured to fix a toner image on recording paper with heat of the heater;
a low voltage detection circuit configured to detect a drop in an input voltage from a power source;
an arithmetic control section configured to determine, when the drop in the input voltage is detected by the low voltage detection circuit, whether or not the drop in the input voltage is linked to working of the heater; and
a storage section,
wherein the arithmetic control section lowers the temperature of the heater when the drop in the input voltage is linked to the working of the heater, and causes the storage section to store a result of the detection by the low voltage detection circuit when the drop in the input voltage is not linked to the working of the heater.
2. An image forming apparatus according to claim 1, wherein
the low voltage detection circuit measures a length of time needed for the input voltage to shift from a first value to a second value, or vice versa, and detects the drop in the input voltage based on the length of time, the first value and the second value being set so as to bracket a voltage of 0 V.
3. An image forming apparatus according to claim 1, wherein
the low voltage detection circuit detects a length of time needed for the input voltage to shift from a first value to a second value, or vice versa, generates a pulse representing the length of time, and detects the drop in the input voltage based on the level of a signal obtained by smoothing the pulse, the first value and the second value being set so as to bracket a voltage of 0 V.
4. An image forming apparatus according to claim 1, wherein
the low voltage detection circuit smoothes the input voltage to detect the drop in the input voltage based on the level of the smoothed input voltage.
5. An image forming apparatus according to claim 1, wherein
the low voltage detection circuit is a switching regulator having a control IC and detects the drop in the input voltage based on the input voltage detected by the control IC.
6. An image forming apparatus according to claim 1, wherein
the arithmetic control section determines that the drop in the input voltage is linked to the working of the heater when the difference between a time point at which the heater is turned on and a time point at which the drop in the input voltage is detected is within a predetermined period of time, and determines that the drop in the input voltage is not linked to the working of the heater when the difference is larger than the predetermined period of time.
7. An image forming apparatus according to claim 1, further comprising:
a pair of conveyance rollers configured to convey the recording paper,
wherein the arithmetic control section controls the pair of conveyance rollers so that a conveyance speed of the recording paper is reduced as well as lowers the temperature of the heater.
8. An image forming apparatus according to claim 1, wherein
the arithmetic control section causes the storage section to store information of a job in execution when the drop in the input voltage is not linked to the working of the heater.
9. An image forming apparatus according to claim 1, further comprising:
a display section,
wherein when the drop in the input voltage is due to a temporal failure in the power source, the arithmetic control section causes the display section to display a warning screen showing that there is a drop in the input voltage from the power source and that image formation is resumed once the input voltage is normal again.
10. A method for controlling an image forming apparatus that fixes a toner image on recording paper with heat of a heater, comprising:
determining whether or not there is a drop in an input voltage from a power source based on a detection signal from a low voltage detection circuit;
determining whether or not the drop in the input voltage is linked to working of the heater;
lowering the temperature of the heater when the drop in the input voltage is linked to the working of the heater; and
causing a storage section to store a result of the detection by the low voltage detection circuit when the drop in the input voltage is not linked to the working of the heater.