1. An organic light emitting diode display device, comprising:
a first transistor connected between a data line and a first node;
a second transistor connected between the first node and a second node;
a third transistor connected between a reference voltage line and a third node;
a fourth transistor connected between an initialization voltage terminal and the second node;
a driving transistor having a source electrode connected to the second node, a gate electrode connected to the third node, and a drain electrode connected to a high electric potential voltage terminal;
a first capacitor connected between the first node and the drain or source electrode of the driving transistor;
a second capacitor connected between the first node and the third node; and
a light emitting diode connected to a low electric potential voltage terminal and to the second node.
2. The organic light emitting diode display device of claim 1, wherein the first capacitor maintains a data voltage transmitted from the data line for one frame whereby a constant current flows through the light emitting diode.
3. The organic light emitting diode display device of claim 1, wherein the first capacitor is connected between the first node and the drain electrode of the driving transistor.
4. The organic light emitting diode display device of claim 1, wherein the first capacitor is connected between the first node and the source electrode of the driving transistor.
5. The organic light emitting diode display device of claim 1, wherein the display device provides a reference voltage through the reference voltage line and a control signal through a control line to the drain and gate electrode of the third transistor, respectively.
6. The organic light emitting diode display device of claim 1, wherein the display device provides an initialization signal through an initialization line and an initialization voltage through the initialization voltage terminal to the gate and drain electrode of the fourth transistor, respectively.
7. The organic light emitting diode display device of claim 1, wherein the display device includes a plurality of scan lines, one of the plurality of scan lines being connected to the gate of the first transistor, and a select signal through the one of the plurality of scan lines being provided to the gate of the first transistor.
8. The organic light emitting diode display device of claim 1, wherein the display device provides an initialization signal through the initialization voltage terminal, a control signal through a control line, and a select signal through a scan line, by a same driver integrated circuit (IC).
9. A method of driving an organic light emitting diode display device including first, second, third and fourth transistors, a driving transistor, first and second capacitors, and an organic light emitting diode (OLED), comprising:
applying an initialization voltage to a first node connected to the second capacitor and a second node connected to the driving transistor, and applying a reference voltage to a third node connected to a gate electrode of the driving transistor, while the first, second and fourth transistors are turned on;
applying a threshold voltage of the driving transistor to the second capacitor, while the second and third transistors are turned on; and
applying a data voltage to the first node for the organic light emitting diode to emit light, while the first transistor is turned on.
10. The method of claim 9, further comprising maintaining the data voltage at the first node, while the first, second, third, and forth transistors are turned off.
11. The method of claim 9, wherein during the applying the initialization voltage and the applying the reference voltage, the OLED is prevented from emitting light.
12. The method of claim 9, wherein during the applying the threshold voltage, the second capacitor stores the threshold voltage.
13. The method of claim 9, wherein during the applying the data voltage, the OLED begins emitting light.
14. The method of claim 10, wherein during the maintaining the data voltage, current flows through the OLED so that the OLED emits light, an amount of the current flowing through the OLED being related to the data voltage but being unrelated to the threshold voltage.
15. The method of claim 9, wherein the organic light emitting diode display device includes:
the first transistor connected between a data line and the first node;
the second transistor connected between the first node and the second node;
the third transistor connected between a reference voltage line and the third node;
the fourth transistor connected between an initialization voltage terminal and the second node;
the driving transistor having a source electrode connected to the second node, the gate electrode connected to the third node, and a drain electrode connected to a high electric potential voltage terminal;
the first capacitor connected between the first node and the drain or source electrode of the driving transistor;
the second capacitor connected between the first node and the third node; and
the OLED connected to a low electric potential voltage terminal and to the second node.
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 ultrasound diagnostic apparatus comprising:
an ultrasonic probe configured to transmit ultrasound while three-dimensionally scanning, and receive ultrasound reflected by a biological tissue;
an image data generator configured to generate image data of a tomographic image of the biological tissue based on reception results of ultrasound;
a memory configured to store cross-sectional-position information showing a cross-sectional position of the tomographic image;
a display part; and
a controller configured to:
control the image data generator so as to, based on a cross-sectional position shown in cross-sectional-position information obtained when image data of a tomographic image of the biological tissue has been generated previously, and reception results of new ultrasound, generate image data of a new tomographic image in the relevant cross-sectional position; and
cause the display part to display the new tomographic image.
2. The ultrasound diagnostic apparatus according to claim 1, wherein:
the image data generator generates volume data of the biological tissue based on reception results of ultrasound, and generates image data of an MPR image based on the volume data, as image data of the tomographic image; and
the memory stores a cross-sectional position of the MPR image, as the cross-sectional-position information.
3. The ultrasound diagnostic apparatus according to claim 2, further comprising an operating part, wherein:
when a cross-sectional position is specified by the operating part, the image data generator generates image data of an MPR image of the specified cross-sectional position based on past volume data, and generates image data of an MPR image of the specified cross-sectional position based on new volume data; and
the controller causes the display part to display the past MPR image and the new MPR image side by side.
4. The ultrasound diagnostic apparatus according to claim 2, further comprising an operating part configured to change an imaging mode that includes a scanning pattern of ultrasound by the ultrasonic probe andor a generating pattern of image data of an MPR image by the image data generator, wherein:
the memory stores the cross-sectional-position information so as to be associated with an imaging mode used when image data of an MPR image has been generated; and
when an imaging mode is changed by the operating part, the image data generator generates image data of an MPR image after the change, based on a cross-sectional position shown in cross-sectional-position information associated with the imaging mode after the change, of cross-sectional-position information stored in the memory.
5. The ultrasound diagnostic apparatus according to claim 2, wherein:
the image data generator generates image data of each of MPR images of two or more cross-sectional positions different from each other, based on the volume data;
the memory stores cross-sectional-position information including a cross-sectional position of each of the two or more MPR images; and
the controller causes the display part to display side by side, two or more past MPR images, and two or more MPR images based on new volume data and past cross-sectional-position information.
6. The ultrasound diagnostic apparatus according to claim 1, wherein:
the biological tissue is a heart;
the apparatus further comprises an electrocardiogram generator configured to generate an electrocardiogram showing time changes of electrical activities of a heart;
the ultrasonic probe transmits ultrasound while scanning, in a circulative manner, a plurality of partial regions of a heart in accordance with a period shown in the electrocardiogram, and sequentially receives ultrasound reflected from each of the plurality of partial regions;
the image data generator sequentially generates volume data of each of the plurality of partial regions, based on reception results of the ultrasound, and sequentially generates image data of MPR images based on the volume data, as image data of the tomographic images; and
the memory stores cross-sectional positions of the MPR images, as the cross-sectional-position information.
7. The ultrasound diagnostic apparatus according to claim 6, wherein the controller causes the display part to sequentially display MPR images based on the sequentially generated image data, in synchronization with a period shown in the electrcardiogram.
8. The ultrasound diagnostic apparatus according to claim 6, wherein the controller causes the display part to display sequentially and side by side, an MPR image of each of the plurality of partial regions based on past image data, and an MPR image of each of the plurality of partial regions based on new image data, in synchronization with a period shown in a new electrocardiogram.
9. The ultrasound diagnostic apparatus according to claim 1, wherein:
the memory stores cross-sectional-position information for each of two or more approaches of the ultrasonic probe to a biological tissue;
the controller controls the image data generator so as to generate image data of a new tomographic image, based on a cross-sectional position shown in cross-sectional-position information for past approach of one approach, and reception results of ultrasound based on new approach of the one approach; and
the controller causes the display part to display side by side, a past tomographic image and a new tomographic image that are obtained by the one approach.
10. The ultrasound diagnostic apparatus according to claim 1, wherein:
the ultrasonic probe transmits and receives ultrasound for each of a plurality of phases in a stress echocardiography of a biological tissue;
in a case where a second phase examination is performed after a first phase examination, the controller controls the image data generator so as to, based on a cross-sectional position shown in cross-sectional-position information obtained at the time of generation of image data of a tomographic image of the first phase, and reception results of ultrasound in the second phase, generate image data of a tomographic image of the second phase in the relevant cross-sectional position; and
the controller causes the display part to display a tomographic image of the first phase and a tomographic image of the second phase side by side.
11. The ultrasound diagnostic apparatus according to claim 1, wherein the controller causes the display part to display the past tomographic image and the new tomographic image side by side.
12. An ultrasound diagnostic apparatus comprising:
an ultrasonic probe configured to transmit ultrasound while scanning, and receive ultrasound reflected by a biological tissue;
an image data generator configured to generate image data of a tomographic image of the biological tissue, based on reception results of ultrasound;
a memory configured to store scanning position information showing a scanning position of ultrasound by the ultrasonic probe;
a display part; and
a controller configured to:
control the ultrasonic probe at the time of generation of image data of a new tomographic image of the biological tissue so as to transmit ultrasound to a scanning position shown in scanning position information obtained at the time of past generation of image data of a tomographic image;
control the image data generator so as to generate image data of a new tomographic image based on reception results of the ultrasound; and
cause the display part to display the new tomographic image.
13. The ultrasound diagnostic apparatus according to claim 12, wherein:
the ultrasonic probe transmits ultrasound while scanning along each of a plurality of scanning directions crossing each other, based on control performed by the controller;
with respect to each of the plurality of scanning directions, based on reception results of ultrasound transmitted and scanned along the relevant scanning directions, the image data generator generates image data of a tomographic image having a cross section in the relevant scanning direction and an ultrasound traveling direction; and
the memory stores scanning position information showing a scanning position of ultrasound along each of the plurality of scanning directions.
14. The ultrasound diagnostic apparatus according to claim 13, wherein the controller causes the display part to display side by side, past tomographic images and new images in the plurality of scanning positions corresponding to the plurality of scanning directions.
15. The ultrasound diagnostic apparatus according to claim 12, wherein:
the memory stores scanning position information for each of two or more approaches of the ultrasonic probe to the biological tissue;
the controller controls the ultrasonic probe so as to transmit ultrasound to a scanning position shown in scanning position information in past one approach;
the controller controls the image data generator so as to generate image data of a new tomographic image based on new reception results of the ultrasound; and
the controller causes the display part to display side by side, a past tomographic image and a new tomographic image obtained by the one approach.
16. The ultrasound diagnostic apparatus according to claim 12, wherein:
the ultrasonic probe transmits and receives ultrasound for each of a plurality of phases in a stress echocardiography examination of a biological tissue;
in a case where a second phase examination is performed after a first phase examination, the controller controls the ultrasonic probe so as to transmit ultrasound to a scanning position shown in scanning position information obtained at the time of generation of image data of a tomographic image of the first phase;
the controller controls the image data generator so as to generate image data of a tomographic image of the second phase, based on reception results of ultrasound transmitted to the scanning position; and
the controller causes the display part to display a tomographic image of the first phase and a tomographic image of the second phase side by side.
17. The ultrasound diagnostic apparatus according to claim 12, wherein the controller causes the display part to display the past tomographic image and the new tomographic image side by side.
18. A medical image-processing apparatus comprising:
an image data generator configured to generate image data of an MPR image, based on volume data of a biological tissue generated by an ultrasound diagnostic apparatus;
a memory configured to store cross-sectional-position information showing a cross-sectional position of the MPR image;
a display part; and
a controller configured to:
control the image data generator so as to, based on cross-sectional-position information of an MPR image from volume data generated on a first date, and volume data generated on a second date, generate image data of an MPR image of the second date in a cross-sectional position shown in cross-sectional information of the first date; and
cause the display part to display an MPR image of the second date.
19. A medical image-processing apparatus comprising:
an image data generator configured to generate image data of an MPR image, based on volume data of a biological tissue generated by an ultrasound diagnostic apparatus;
a memory configured to store cross-sectional-position information showing a cross-sectional position of the MPR image;
a display part; and
a controller configured to:
control the image data generator so as to, based on cross-sectional-position information of an MPR image from volume data generated on a first date, and volume data generated on each of the first date and a second date, generate image data of an MPR image of each of the first date and the second date in a cross-sectional position shown in cross-sectional information of the first date; and
cause the display part to display an MPR image of the first date and an MPR image of the second date side by side.
20. A medical image-processing apparatus that processes volume data generated by an ultrasound diagnostic apparatus for each of a plurality of phases in a stress echocardiography examination of a biological tissue, comprising:
an image data generator configured to generate image data of an MPR image, based on the volume data;
a memory configured to store cross-sectional-position information showing a cross-sectional position of the MPR image;
a display part; and
a controller configured to:
in a case where a second phase examination is performed after a first phase examination, control the image data generator so as to, based on cross-sectional-position information obtained at the time of generation of image data of an MPR image of the first phase, and volume data of each of the first phase and the second phase, generate image data of an MPR image of each of the first phase and the second phase in a cross-sectional position shown in cross-sectional-position information of the first phase; and
cause the display part to display an MPR image of the first phase and an MPR image of the second phase side by side.