TWI404446B - Organic light-emitting display and control method thereof - Google Patents

Organic light-emitting display and control method thereof Download PDF

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Publication number
TWI404446B
TWI404446B TW96113534A TW96113534A TWI404446B TW I404446 B TWI404446 B TW I404446B TW 96113534 A TW96113534 A TW 96113534A TW 96113534 A TW96113534 A TW 96113534A TW I404446 B TWI404446 B TW I404446B
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Taiwan
Prior art keywords
voltage
organic light
power
storage capacitor
data
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Application number
TW96113534A
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Chinese (zh)
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TW200843546A (en
Inventor
Yu Wen Chiou
Chen Yu Wang
Ming Chun Tseng
Hong Ru Guo
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Chi Mei El Corp
Himax Tech Ltd
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Priority to TW96113534A priority Critical patent/TWI404446B/en
Publication of TW200843546A publication Critical patent/TW200843546A/en
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Publication of TWI404446B publication Critical patent/TWI404446B/en

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Abstract

An organic light-emitting display (OLED) and a control method thereof are disclosed. The OLED comprises a plurality of pixels, wherein each pixel is used to display a predetermined color and comprises: an organic light-emitting element, a scan switch, a storage capacitor, a current control element, and a display switch. The control method of the OLED comprises: providing a data writing stage and a display compensation stage. The data writing stage comprises: turning off the display switch to turn off the organic light-emitting element; and turning on the scan switch to input a data voltage to the storage capacitor. The display compensation stage comprises: turning off the scan switch for changing the voltage at one terminal of the storage capacitor in accordance with the voltage at the other terminal thereof; and turning on display switch for enabling the current control element to output working current to the organic light-emitting element.

Description

Organic light emitting display device and control method thereof

The present invention relates to an organic light emitting display device and a control method thereof, and more particularly to an organic light emitting display device and a control method thereof.

Compared with the conventional liquid crystal display, the viewing angle is wide and the reaction time is fast, and the display using the organic light-emitting material (for example, the organic light-emitting diode) has the advantages of wide viewing angle and fast reaction time. The use of an organic compound as a luminescent material enables a flat panel display having a self-luminous source and a high reaction speed at various viewing angles. When OLED displays are used in consumer electronics such as digital cameras, personal digital assistants (PDAs), and video phones, they offer the advantages of low power consumption, high brightness, and slim size. The organic light emitting display can be divided into an active array device and a passive array device. The main difference between the two is that the active array device uses a capacitor with a capacitor to store data, and the transistor can output according to the data stored in the capacitor. The current is applied to the organic light-emitting material to control the gray scale of the picture.

Since the volume of various electronic consumer products is getting smaller and smaller, the volume of the organic light-emitting display device is compressed, and the circuit process is limited, the circuit wiring of the organic light-emitting display device may have a considerable resistance. When the organic light emitting display device starts to draw current, these resistors form a voltage drop on the wiring, which causes the organic light emitting display device to operate abnormally.

Please refer to FIG. 1 , which is a circuit diagram of a pixel of a conventional organic light emitting display device, wherein the pixel 110 is used to display a preset color, Vss It represents a ground reference potential of the organic light-emitting display device 100. In the pixel 110, the transistor switch 112 receives the data voltage Vdata of the data line 116 according to the scan signal of the scan line 114. When the transistor switch 112 is turned on, the data voltage Vdata is transmitted to the capacitor 120, and a potential difference is generated between the power supply voltage Vp provided by the power supply device 121 at both ends of the capacitor 120, so that the capacitor 120 stores a potential difference representing a preset color. . Next, the transistor 124 supplies an operating current to the organic light emitting diode 126 according to the potential difference, and causes the organic light emitting element 126 to display a preset color. As can be seen from the above description, the data stored in the preset color of the capacitor 120 is determined by the power supply voltage Vp and the data voltage Vdata. Under normal conditions, the value of the wiring resistance R is very small, and the power supply voltage Vp can be regarded as a constant value. Therefore, the data line 116 only needs to provide the corresponding data voltage Vdata according to the power supply voltage Vp, so that the organic light emitting diode 126 can be displayed. Preset color. However, if the wiring volume is too small, the wiring resistance R rises. When the pixel 110 draws current, the power supply voltage Vp is reduced by the influence of the wiring resistance R, so that the potential difference stored in the capacitor 120 also becomes smaller, making the organic The display element 126 has a display error.

Therefore, there is a need for a new organic light emitting display device and method of use thereof to avoid display errors due to voltage drops.

One aspect of the present invention provides an organic light emitting display device and a control method thereof to avoid display errors due to voltage drop.

According to an embodiment of the invention, the organic light emitting display device comprises at least: a plurality of pixels, wherein each pixel is used to display a preset color, each image The system includes at least: an organic light emitting element, a scan switch, a storage capacitor, a current control element, and a display switch. The organic light emitting element is used to display the preset color described above. The scan-on relationship is used to receive the data voltage according to a scan signal. The storage capacitor is used to store the data potential difference representing the preset color, wherein the data potential difference is the difference between the data voltage and the power supply voltage. The current control component is configured to output an operating current to the organic light emitting component, wherein the current control component is electrically connected to the storage capacitor to output the operating current according to the data potential difference. The display on relationship is used to control the working state of the organic light emitting element, wherein the display on relationship operates according to the reverse scan signal, and the reverse scan signal is opposite to the scan signal. Wherein, when the storage capacitor stores the data potential difference and the scan switch is turned off, the voltage value of one end of the storage capacitor can be changed according to the voltage value of the other end of the storage capacitor, and the storage capacitor is applied with the data voltage, and the storage capacitor is used. The other end is applied with a power supply voltage.

According to still another embodiment of the present invention, the organic light emitting display device includes at least: a plurality of pixel columns and a plurality of display switches, wherein each pixel column includes a plurality of pixels, each pixel is configured to display a preset color and at least Includes: organic light-emitting elements, scan switches, storage capacitors, and current control components. The organic light emitting element is used to display a preset color. The scan-on relationship is used to receive the data voltage according to a scan signal. The storage capacitor is used to store the data potential difference representing the preset color, wherein the data potential difference is the difference between the data voltage and the power supply voltage. The current control component is configured to output an operating current to the organic light emitting component, wherein the current control component is electrically connected to the storage capacitor to output the operating current according to the data potential difference. When the storage capacitor stores a data potential difference and the scan switch is turned off, the voltage value of one end of the storage capacitor is stored according to The voltage at the other end of the capacitor changes. The end of the storage capacitor is applied with a data voltage, and the other end of the storage capacitor is applied with a supply voltage. The display relationship is electrically connected to the pixel column in a one-to-one manner to control the operating state of the organic light emitting device according to the reverse scan signal, wherein the reverse scan signal is opposite to the scan signal.

According to still another embodiment of the present invention, a method for controlling an organic light emitting display device is provided. The control method includes at least: providing a data writing phase, the data writing phase includes at least: turning off the display switch to enable current control The component stops supplying the working current to the organic light emitting component; the scan switch is turned on to receive the data voltage and the data voltage is output to the storage capacitor, so that the storage capacitor stores the data potential difference representing the preset color, wherein the data potential difference is the difference between the data voltage and the power voltage And providing a compensation picture display stage, the compensation picture display stage includes at least: turning off the scan switch, so that the voltage value of one end of the storage capacitor is changed according to the voltage value of the other end, wherein the end of the storage capacitor is applied with a data voltage, The other end of the storage capacitor is applied with a power supply voltage; and the display switch is turned on to cause the current control element to output an operating current to the organic light emitting element according to the data potential difference to turn on the organic light emitting element.

Referring to FIG. 2a and FIG. 2b, FIG. 2a is a schematic structural view of an organic light emitting display device 200 according to a first embodiment of the present invention, and FIG. 2b is a first embodiment of the present invention. A schematic circuit diagram of pixel 202. The organic light-emitting display device 200 includes a power supply device 201, a plurality of pixels 202, a plurality of scanning lines 204, and a plurality of data lines 206, wherein the wiring A resistor R is located between each pixel 202 and the power supply unit 201. The organic light emitting display device 200 controls the operating time of each pixel 202 by using the scan line 204, and uses the data line 206 to transmit the data displayed by the pixel 202, so that each pixel 202 displays a preset color.

Each pixel 202 includes at least an organic light emitting element 212, a scan switch 214, a storage capacitor 216, a current control element 218, and a display switch 220. The organic light-emitting element 212 is used to display the preset color 210 when the pixel 202 is in operation, wherein the organic light-emitting element 212 can be, for example, an organic light-emitting diode. The scan switch 214 is electrically connected to the scan line 204 and the data line 206 to receive the data voltage Vdata provided by the data line 206 according to the scan signal Sscan. One end of the storage capacitor 216 is electrically connected to the scan switch 214 , and the other end of the storage capacitor 216 is electrically connected to the power supply device 201 . When the scan switch 214 is turned on, the data capacitor Vdata is applied to one end of the storage capacitor 216, and the power supply voltage Vp is applied to the other end. The potential difference between the data voltage Vdata and the power supply voltage Vp is a data potential difference representing the preset color 210. . Therefore, it can be easily understood that the storage capacitor 216 is used to store the data potential difference in the manner described above. The current control component 218 is electrically connected to the storage capacitor 216 for outputting an operating current to the organic light emitting component 212 according to the data potential difference stored in the storage capacitor 216, so that the organic light emitting component 212 emits light according to the intensity of the operating current. The display switch 220 is for controlling the operating state of the organic light emitting element 212, wherein the display switch 220 operates according to the reverse scan signal Sxscan. The reverse scan signal Sxscan is opposite to the scan signal Sscan, so when the working state of the scan switch 214 is on, the working state of the display switch 220 is off; when the working state of the scan switch 214 is off, the display switch The working status of 220 is on.

Referring again to FIG. 2b, in the first embodiment of the present invention, the scan switch 214, the current control element 218, and the display switch 220 are P-type transistors, wherein the gate (G) of the current control element 218 is electrically The source (S) is connected to the power supply voltage Vp and is electrically connected to the other end of the storage capacitor 216 (ie, the node B), The pole (D) is electrically connected to the display switch 220. Therefore, the gate-on voltage Vgs of the current control element 218 is equal to the data potential difference stored by the storage capacitor 216. The display switch 220 is electrically connected between the current control element 218 and the organic light emitting element 212 to determine whether the current control element 218 can supply an operating current to the organic light emitting element 212.

Please refer to FIG. 3, which is a waveform diagram showing the voltage of the node A and the voltage of the node B according to the first embodiment of the present invention. The first embodiment of the present invention operates the organic light-emitting display device 200 in two stages, a data writing phase 310 and a compensation screen display phase 312. In the data writing phase 310, the scanning signal Sscan is at a low potential, and the reverse scanning signal Sxscan is at a high potential, so the operating state of the scanning switch 214 is on, and the operating state of the display switch 220 is off. When the scan switch 214 is turned on, the data voltage Vdata provided by the data line 206 is input to the storage capacitor 216 via the scan switch 214. If the value of the power supply voltage Vp at this time is V1, the data potential difference stored in the storage capacitor 216 is Va-V1, where Va is the value of the data voltage Vdata. Next, the compensation screen display phase 312 is entered. In the compensation picture display stage 312, the scan signal Sscan is at a high level, and the reverse scan signal Sxscan is at a low level, so the scan switch 214 is turned off. The working state of the display switch 220 is on. When the display switch 220 is turned on, the current control element 218 can provide an operating current to the organic light emitting element 212 according to the data potential difference stored by the storage capacitor 216. If the value of the power supply voltage Vp at this time becomes V2 due to the voltage drop of the wiring resistance R, the voltage of the node A also changes, so that the potential difference of the data stored in the storage capacitor 216 remains unchanged. Assuming that the voltage value of the node A at this time is Vb, V2-V1 = Vb - Va = ΔV, where ΔV represents the value of the voltage drop of the wiring resistance R. Since the data potential difference is not affected by the voltage drop of the wiring resistance R, the organic light emitting element 212 can display the normal preset color 210.

Referring to FIG. 4, a control method 400 of an organic light emitting display device 200 according to a first embodiment of the present invention is illustrated. In step 401, a data writing stage 310 is provided to write data representative of the preset color 210 in the storage capacitor 216. In step 402, a compensated picture display stage 312 is provided to cause the organic light-emitting element 212 to display a normal preset color 210.

Please refer to FIG. 4a, which is a flow chart showing the data writing stage 310. In step 401a, the display switch 220 is turned off to cause the current control element 218 to stop providing an operating current to the organic light emitting element 212 for data writing. In step 401b, the scan switch 214 is turned on to receive the data voltage Vdata, and the data voltage Vdata is sent to the storage capacitor 216, so that the storage capacitor 216 stores the data potential difference representing the preset color 210.

Please refer to FIG. 4b, which is a flow chart showing the compensation screen display stage 312. In step 402a, the scan switch 214 is turned off so that the voltage value of the node A changes in accordance with the power supply voltage Vp. In step 402b, the display switch 220 is turned on to cause the current control element 218 to output an operating current according to the data potential difference. The organic light emitting element 212 is turned on to turn on the organic light emitting element 212.

Referring to FIG. 5a and FIG. 5b, FIG. 5a is a schematic structural view of an organic light emitting display device 500 according to a second embodiment of the present invention, and FIG. 5b is a second embodiment of the present invention. A schematic circuit diagram of pixel 502. Pixel 502 is similar to pixel 202, but pixel 502 further includes power supply selection device 508, wherein power supply selection device 508 includes a first power switch 510 and a second power switch 512. The first power switch 510 is configured to provide a first voltage Vp1 according to the scan signal Sscan, and the second power switch 512 is configured to provide a second voltage Vp2 according to the reverse scan signal Sxscan. The first power switch 510 and the second power switch 512 are electrically connected to the electrical connection of the storage capacitor 216 and the current control element 218 (ie, node B). According to the above description, it can be reasonably inferred that the power source voltage Vp is the first voltage Vp1 or the second voltage Vp2.

Please refer to FIG. 6, which is a waveform diagram showing the voltage of the node A and the voltage of the node B according to the second embodiment of the present invention. The second embodiment of the present invention operates the organic light-emitting display device 200 in two stages, a data writing phase 310 and a compensation screen display phase 312. In the data writing phase 310, the scan signal Sscan is low, and the reverse scan signal Sxscan is high, so the scan switch 214 and the first power switch 510 are turned on, and the display switch 220 and the second power switch are The working state of 512 is off. When the scan switch 214 is turned on, the data voltage Vdata provided by the data line 206 is input to the storage capacitor 216 via the scan switch 214. In addition, after the first power switch 510 is turned on, the power supply voltage Vp at this time is the first voltage Vp1. If the value of the first voltage Vp1 is V1, the data potential difference stored by the storage capacitor 216 is Va-V1, where Va is data. Voltage Vdata The value. Next, the compensation screen display phase 312 is entered. In the compensation picture display stage 312, the scan signal Sscan is at a high level, and the reverse scan signal Sxscan is at a low level, so the scan switch 214 and the first power switch 510 are turned off, and the display switch 220 and the second power switch are The working state of 512 is on. When the display switch 220 is turned on, the current control element 218 can provide an operating current to the organic light emitting element 212 according to the data potential difference stored by the storage capacitor 216. In addition, when the second power switch 512 is turned on, the voltage of the node B at this time is determined by the second voltage Vp2. When the value of the second voltage Vp2 at this time is changed to V2 due to the voltage drop of the wiring resistance R, the voltage of the node A also changes, and the potential difference of the data stored in the storage capacitor 216 is maintained. Assuming that the voltage value of the node A is Vb at this time, V2-V1=Vb-Va=ΔV, where ΔV is a variation value of the power supply voltage Vp, and since the value of the first voltage Vp1 of the second embodiment is The value of the second voltage Vp2 is independent, so ΔV may be positive or negative. It is worth noting that ΔV is not equal to the difference between the originally designed first voltage Vp1 and the second voltage Vp2 due to the influence of the voltage drop of the wiring resistance R. Since the data potential difference is not affected by the voltage drop of the wiring resistance R, the organic light emitting element 212 can display the normal preset color 210.

Please refer to FIG. 7 and FIG. 8 simultaneously. FIG. 7 is a schematic diagram showing the driving block of the pixel column 702 of the organic light-emitting display device 700 according to the third embodiment of the present invention, and FIG. 8 is a schematic diagram of the pixel array 702 according to the present invention. A schematic diagram of a driving circuit of a pixel 202 of a pixel column 702 of the organic light emitting display device 700 of the third embodiment. The organic light emitting display device 700 is similar to the organic light emitting display device 500, but the pixels 202 of each pixel column 702 of the organic light emitting display device 700 share the first power switch 510 and the second power switch 512. Due to organic light emission The number of transistors of the pixel 202 of the display device 700 is smaller than the number of transistors of the pixel 202 of the organic light-emitting display device 500, and thus the pixel volume of the organic light-emitting display device 700 can be smaller than the pixel volume of the organic light-emitting display device 500.

Referring to FIG. 9 and FIG. 10 together, FIG. 9 is a schematic diagram showing the driving of the pixel column 802 of the organic light-emitting display device 800 according to the fourth embodiment of the present invention, and FIG. 10 is a schematic diagram of the pixel array 802 according to the present invention. A schematic diagram of a driving circuit of a pixel 202 of a pixel column 802 of the organic light emitting display device 800 of the fourth embodiment. The organic light emitting display device 800 is similar to the organic light emitting display device 700, but the pixels 202 of each pixel column 802 of the organic light emitting display device 800 share the display switch 220. Since the number of transistors of the pixels 202 of the organic light-emitting display device 800 is smaller than the number of transistors of the pixels 202 of the organic light-emitting display device 700, the volume of the pixels of the organic light-emitting display device 800 can be further reduced.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and the present invention can be modified and retouched without departing from the spirit and scope of the present invention. The scope is subject to the definition of the scope of the patent application attached.

100‧‧‧Organic light-emitting display device

110‧‧ ‧ pixels

112‧‧‧Transistor Switch

114‧‧‧ scan line

116‧‧‧Information line

120‧‧‧ Capacitance

121‧‧‧Power supply unit

124‧‧‧Optoelectronics

126‧‧‧Organic Luminescent Diodes

200‧‧‧Organic light-emitting display device

201‧‧‧Power supply unit

202‧‧ ‧ pixels

204‧‧‧ scan line

206‧‧‧Information line

212‧‧‧Organic light-emitting elements

214‧‧‧ scan switch

216‧‧‧ storage capacitor

218‧‧‧ Current control components

220‧‧‧ display switch

310‧‧‧Data writing stage

312‧‧‧Compensation screen display stage

400‧‧‧Control method

401‧‧‧ steps

401a‧‧ steps

401b‧‧‧Steps

402‧‧‧Steps

402a‧‧‧Steps

402b‧‧‧Steps

500‧‧‧Organic light-emitting display device

502‧‧ ‧ pixels

508‧‧‧Power selection device

510‧‧‧First power switch

512‧‧‧Second power switch

700‧‧‧Organic light-emitting display device

702‧‧‧pixel columns

800‧‧‧Organic light-emitting display device

802‧‧‧pixel columns

Vss‧‧‧ Ground reference potential

Vdata‧‧‧ data voltage

Vp‧‧‧Power supply voltage

Vp1‧‧‧ first voltage

Vp2‧‧‧second voltage

Sscan‧‧‧ scan signal

Sxscan‧‧‧reverse scan signal

R‧‧‧ wiring resistance

A‧‧‧ node

B‧‧‧ node

V1‧‧‧ voltage value

V2‧‧‧ voltage value

△V‧‧‧ voltage variation

The above and other objects, features, and advantages of the present invention will become more apparent and understood.

FIG. 1 is a circuit diagram showing the pixels of a conventional organic light-emitting display device.

2 is a circuit diagram showing a pixel of an organic light emitting display device according to a first embodiment of the present invention.

Fig. 3 is a waveform diagram showing the voltage of the node A and the voltage of the node B according to the first embodiment of the present invention.

Fig. 4 is a view showing a control method of an organic light-emitting display device according to a first embodiment of the present invention.

Figure 4a is a flow chart showing the data writing phase.

Figure 4b is a flow chart showing the stage of the compensation screen display.

5 is a circuit diagram showing a pixel of an organic light emitting display device according to a second embodiment of the present invention.

Figure 6 is a waveform diagram showing the voltage of the node A and the voltage of the node B according to the second embodiment of the present invention.

Figure 7 is a block diagram showing the driving of a pixel of an organic light-emitting display device according to a third embodiment of the present invention.

8 is a schematic diagram showing a driving circuit of a pixel of a pixel column of an organic light emitting display device according to a third embodiment of the present invention.

Figure 9 is a block diagram showing the driving of a pixel column of an organic light-emitting display device according to a fourth embodiment of the present invention.

FIG. 10 is a schematic diagram showing a driving circuit of a pixel of a pixel column of an organic light emitting display device according to a fourth embodiment of the present invention.

201‧‧‧Power supply unit

202‧‧ ‧ pixels

204‧‧‧ scan line

206‧‧‧Information line

212‧‧‧Organic light-emitting elements

214‧‧‧ scan switch

216‧‧‧ storage capacitor

218‧‧‧ Current control components

220‧‧‧ display switch

Vdata‧‧‧ data voltage

Vss‧‧‧ Ground reference potential

Sscan‧‧‧ scan signal

Vp‧‧‧Power supply voltage

R‧‧‧ wiring resistance

Sxscan‧‧‧reverse scan signal

A‧‧‧ node

B‧‧‧ node

Claims (18)

  1. An organic light emitting display device includes at least a plurality of pixels, each of the pixels is configured to display a predetermined color, and at least includes: an organic light emitting element for displaying the preset color; and a scan switch for Receiving a data voltage according to a scan signal; a storage capacitor for storing a data potential difference representing one of the preset colors, wherein the data potential difference is a difference between the data voltage and a power supply voltage; and a current control component is used And outputting an operating current to the organic light emitting device, wherein the current control component is electrically connected to the storage capacitor to output the operating current according to the data potential difference; and a display switch electrically connected to the current control component Between the organic light-emitting elements, the operating state of the organic light-emitting element is controlled according to a reverse scan signal, wherein the reverse scan signal is opposite to the scan signal; wherein, when the storage capacitor stores the data potential difference And when the scan switch is turned off, the voltage value of one end of the storage capacitor is based on the other end of the storage capacitor. Value is changed, the end of the storage capacitance line voltage is applied to the data, the storage capacitor of the other end tied to the power supply voltage is applied.
  2. An organic light emitting display device according to claim 1, wherein Each of the pixels further includes a power selection device, wherein the power selection device is configured to output a first voltage or a second voltage, and the power voltage is the first voltage or the second voltage.
  3. The OLED device of claim 2, wherein the power selection device further comprises a first power switch and a second power switch, the first power on relationship providing the first voltage according to the scan signal The second power-on relationship provides the second voltage according to the reverse scan signal.
  4. The organic light-emitting display device of claim 1, wherein the organic light-emitting display device further comprises a plurality of power selection devices, wherein the power selection devices are electrically connected to the plurality of pixel columns in a one-to-one manner. To provide a first voltage or a second voltage, the power voltage is the first voltage or the second voltage, and the pixel columns are composed of the pixels.
  5. The OLED device of claim 4, wherein each of the power selection devices comprises a first power switch and a second power switch, the first power on relationship providing the scan signal according to the scan signal The first voltage, the second power-on relationship provides the second voltage according to the reverse scan signal.
  6. The organic light-emitting display device of claim 1, wherein the current control element is a transistor.
  7. The organic light-emitting display device of claim 1, wherein the organic light-emitting element is an organic light-emitting diode.
  8. An organic light-emitting display device comprising: a plurality of pixel columns, wherein each of the pixel columns comprises a plurality of pixels, each of the pixels is configured to display a predetermined color and at least comprise: an organic light-emitting component; Displaying the preset color, a scan switch for receiving a data voltage according to a scan signal; a storage capacitor for storing a data potential difference representing one of the preset colors, wherein the data potential difference is the data voltage and the a difference between the power supply voltages; and a current control component for outputting an operating current to the organic light emitting device, wherein the current control component is electrically connected to the storage capacitor and outputs the operating current according to the data potential difference; When the storage capacitor stores the potential difference of the data and the scan switch is turned off, the voltage value of one end of the storage capacitor is changed according to the voltage value of the other end of the storage capacitor, and the data voltage is applied to one end of the storage capacitor. The other end of the storage capacitor is applied with the power voltage; and a plurality of display switches, wherein the display The open relationship is electrically connected to the pixel columns in a one-to-one manner, and each of the display open relationships is electrically connected between the corresponding pixel columns and a ground reference voltage to control the organic according to a reverse scan signal. The working state of the light-emitting element, the reverse scan signal system and the scan The tick is reversed.
  9. The OLED display device of claim 8, wherein each of the pixels further comprises a power selection device, wherein the power selection device is configured to output a first voltage or a second voltage, the power voltage It is the first voltage or the second voltage.
  10. The OLED device of claim 9, wherein the power selection device further comprises a first power switch and a second power switch, wherein the first power-on relationship provides the first voltage according to the scan signal. The second power-on relationship provides the second voltage according to the reverse scan signal.
  11. The organic light-emitting display device of claim 8, wherein the organic light-emitting display device further comprises a plurality of power selection devices, wherein the power selection devices are electrically connected to the pixel columns in a one-to-one manner. To provide a first voltage or a second voltage.
  12. The OLED device of claim 11, wherein each of the power selection devices comprises a first power switch and a second power switch, the first power on relationship providing the scan signal according to the scan signal The first voltage, the second power-on relationship provides the second voltage according to the reverse scan signal.
  13. The organic light-emitting display device of claim 8, wherein the current control element is a transistor.
  14. The organic light-emitting display device of claim 8, wherein the organic light-emitting element is an organic light-emitting diode.
  15. A method for controlling an organic light emitting display device, wherein the organic light emitting display device comprises a plurality of pixels, each of the pixels includes an organic light emitting device, wherein the organic light emitting device is configured to display a predetermined color, and the control method is at least The method includes: providing a data writing phase, the data writing phase includes at least; closing a display switch to stop a current control component from providing an operating current to the organic light emitting component, wherein the display open relationship is electrically connected to the An organic light emitting device and the current control element are electrically connected between the corresponding pixel column and a ground reference voltage; and a scan switch is turned on to receive a data voltage and output the data voltage to a storage capacitor. Storing the storage capacitor to represent a data potential difference of the preset color, wherein the data potential difference is a difference between the data voltage and a power voltage; and providing a compensation picture display stage, the compensation picture display stage at least comprising: turning off the Scanning the switch so that the voltage value of one end of the storage capacitor is based on the storage capacitor The other end of the voltage value is changed, wherein the end of the storage capacitance line voltage is applied to the data, the other end of the storage capacitor lines is applied to the electrically a source voltage; and turning on the display switch to cause the current control element to output the operating current to the organic light emitting element according to the data potential difference.
  16. The method of controlling an organic light emitting display device according to claim 15, wherein the organic light emitting display device further comprises a power selection device, wherein the power selection device is configured to provide a first voltage or a second voltage. The voltage is the first voltage or the second voltage.
  17. The control method of the organic light-emitting display device of claim 16, wherein the power selection device further comprises a first power switch and a second power switch, the first power-on relationship being provided in the data writing phase The first voltage, the second power supply is related to providing the second voltage in the compensation picture display phase.
  18. The method of controlling an organic light-emitting display device according to claim 15, wherein the organic light-emitting element is an organic light-emitting diode.
TW96113534A 2007-04-17 2007-04-17 Organic light-emitting display and control method thereof TWI404446B (en)

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