TWI285867B - Digital driving method and device of active-type OLED display - Google Patents

Abstract

The present invention provides a digital driving method and device of active-type OLED display. The device is formed of plural sets of pixel devices. The OLED of each pixel device is grounded with a common cathode. By controlling the potential of power line, the program display separation in digital driving structure is realized. During inputting the digital image, the power line potential is connected to GND, so that the OLED cannot emit light. During outputting the image data, the power line potential is connected to the positive voltage, so than the OLED emits light.

Description

V. INSTRUCTION DESCRIPTION OF THE INVENTION (1) Technical Field The present invention relates to a digital driving method and apparatus for an active organic light emitting diode display, and more particularly to a method for controlling the power supply line potential to realize writing and writing. Brightly separated digital drive architecture. [Prior Art] It is known that TFTs are currently classified into two types: amorphous germanium (a-Si TFT) and polycrystalline germanium (Poly-Si TFT), and the so-called TFT-LCD bundle refers to amorphous germanium (a_Si TFT). At present, the technology is mature and is the mainstream product of LCD. The maximum difference between low temperature polycrystalline germanium (LTPS TFT) and a-Si TFT is that the kLTPS transistor is a further step of laser tempering, and the amorphous germanium film is transformed into a polycrystalline germanium film layer, so that the LTPS is in the twin structure. The arrangement of the upper &-Si TFTs is orderly, so that the electron conduction rate can be increased to 2 〇〇cni 2/V-sec. LTPS technology can make components smaller, reduce the overall TFT component area by more than 50%, and increase the aperture ratio (aperture rati〇), which can produce higher resolution than a-Si TFT in the same size. And reduce the power consumption; the driver module can be directly integrated into the glass substrate (System on Glass), which can integrate part of the Driver ic into the glass substrate, which is beneficial to reduce the required area and component number of the circuit board. The connection between the driver IC and the panel electrode reduces the material cost, and at the same time, avoids product damage caused by assembly in the assembly process of the rear module, thereby improving the yield and reducing the manufacturing cost; In addition to reducing the weight of the IC, the integration of some Driver 1C can reduce the other materials required for the assembly in the back stage, and the overall weight will be greatly reduced. Because low temperature polycrystalline germanium (LTPS TFT) still has power saving, high brightness, and fine picture 1285867. V. Invention description (2) Thin, light and small contacts (less than 20 接 contacts, which can improve yield, a one si TFT has more than 3842 contacts) and so on. However, since the thin film transistor manufactured by the low temperature polysilicon (L τ ps ) process may vary in characteristics, when the driving system uses the analogy (ANAL〇G) and the modulation method to express the gray scale, it is often because of the film. The transistor (TFT) has different characteristics after the laser tempering process step. Even if the same voltage signal is written, the diodes of different elements generate different currents and emit different brightnesses. The phenomenon causes the organic light-emitting diode panel to display an image of gray-scale error, and destroys the image uniformity. (I mageunif 〇F mit ^ ^ [Summary of the Invention] The main purpose of the present invention is to solve the above-mentioned problem. In the absence of the present invention, the present invention utilizes the digital power level of the control power supply line to be written into the bright and separated digital drive architecture. 1 For the above purpose, the digital display method and apparatus for the active organic display of the present invention, the main < .,, X...The device is composed of, and each element (ρ: body (〇L· £ D) adopts common cathode grounding method.

Low, to achieve write-and-light separation (pr 〇 control power line potential 3 ” S ...... Di"] When the material is negative, connect the power line potential to Wen', and the input light-emitting diode cannot be illuminated. In the wheel of the i-image data: ND), the potential of the piano is connected to the positive potential '俾 to make the organic light-emitting diodes take off: the power supply』

1285867 The details and technical description of the present invention are described below with reference to the following drawings: [Simplified illustration of the first and second figures of the first and second figures of the second embodiment of the first and second figures of the second embodiment of the first and second figures 3 to 1 is a schematic diagram of an active organic light-emitting single pixel device according to a first embodiment of the present invention. The timing diagram of the driving voltage waveforms in the first to the first. A schematic view of a second embodiment of the present invention. The timing diagram of the driving voltage waveforms in the second to first figures. A schematic view of a third embodiment of the present invention.

'The timing diagram of the driving voltage waveforms in Figures 3 to 1. Intention and invention, the main, and the common yin is written to the par to connect the power supply body 4 bits to the first - active type is separated by each draw pole grounding ate line 7 can not be sent to the positive The above-mentioned organic organic image of the organic image is in the form of a device, the (P rd ) bit is connected brightly, and the method of the in-position V Η b 1 illuminates the two-drive electro-optic diode (1 0 control 0 gr digit 駆 to zero Electric output shadow '俾使' this hair

For the active embodiment, please refer to "Fig. 1 - 2", which is a timing chart of a single pixel device voltage waveform of the first polar display of the present invention. As shown in the figure: the digital display method of the main body display and the PIXel device 10 consist of an organic light-emitting diode (OLE D) 4 power supply line 7 potential level to achieve the am Display S e motion architecture, when inputting image data , (GND), when the organic light-emitting two-image data is made, the electric organic light-emitting diode 4 of the power supply line 7 is illuminated. The use of alizarin (p i X e 1 )

1285867 _

V. Description of the invention (4), including: a switch unit χ, - 2: 3 and an organic light-emitting diode (〇Led; early 2, a storage switch unit can be a thin channel of the P channel Composition; among them, the switching unit 1; μ 1 t 1 d dielectric transistor (Ding F τ,, μ· ^ 1 two wheel-in terminals 1 1 , 1 2 respectively AF τ) 'This C an L ine ) 5 and - Data ^ has a scan line ne) 6 connection; Bess line (D ata L i the drive unit 2, can be p channel this drive unit 2 input connection 2 ^ = body (TFT), υ, ινε", and another - the end wheel 4r = suppL 兀 1 wheel outlet 13 is connected; with the above-mentioned switch unit, the storage unit 3 is connected by a capacitor to the output terminal 丄3 of the switch unit 与 and the ground, the other end 22 is connected; Move the early 2 input to the organic light-emitting diode (〇LED) 4 >&

The output terminal 2 3 of the driving unit 2 is connected, and the terminal 4 1 and the output terminal 4 2 of the above ED) 4 are grounded; the organic light emitting diode (0L Μ when scanning the image data, the lightning zero potential GND, 俾The H-bit of the organic light-emitting diode is connected to the unit 1 to be in a conducting state. At this time, the image is "material 2". In the switch-off unit 1, after scanning by the scanning line 5, the bellows line 6 enters and the switching unit is turned on. After the storage unit is filled with lightning, in the storage unit 3 (light, then store zero voltage GND to store π) 'If the image data is not bright, then store the positive voltage ν Η 2 = 3, if the image data is The scanning line potential in the process is in the G potential of the G potential 3; in the scan ▼冤b ND, the potential of the other scanning lines

Page 9 1285867 V. INSTRUCTIONS (5) = After the temple completes all scanning operations, connect the potential of the power line 7 to the positive potential VH, and the two α ^ yuan 3 η + + to store the zero voltage gne > in the storage list The diode 4 is bright. The second embodiment diagram and the second to the lBt diagram are the first diagram of the present invention: the active 2 = dynamic f voltage waveform timing diagram of the present invention. For example, the method and device are mainly composed of complex =====go' and each elementary device; U is set to 0LED) 4 adopts common cathode grounding mode to emit light-polar body (high and low to achieve writing) Weighing the power supply line 7 potential: κ material: Connect the power line 7 potential to:, the potential of the power line 7 is connected to the positive potential VH, 俾; Ϊ::, then 4 will be bright. The organic light-emitting diode is the method of the above, and the device 20 of the present invention comprises a taxi 7 ~ ^ C p 1 X e 1 ) unit 3 and - the organic light emitting switch unit 1 can be a thin film of the channel = (construction 70%; its A, switch unit 1 two input terminals iii 2 respectively ί = (/ ΡΤ), this (S can L ine) 5 and a data line $ have - scan line ne) 6 connection; (Data Li

This drive ί元 ί' can be a p-channel thin film transistor (Ding this... wheel-in connection 21 connection power supply two T two) L Page 10

JOL clarification (6) LINE) γ, 疋1 wheel end 13 connection: f one end of the wheel end 22 and the above-mentioned switch single x faulty unit 3 is connected by the capacitor to the other end to the switch unit 1 In the mountain, one end is connected to the wheel of the power line, the end 22 is connected; the output end 13 and the input unit 41 of the driving unit 2, the organic light emitting diode, the output end 23 of the moving unit 2, and the above

The output terminal 42 is grounded 丨, and the organic light emitting diode (0L when the device scans the image potential GMD '俾 causes the emitter: the polarity of the line 7 is connected to the rendered conductive state, at which time 4 cannot be illuminated, the Switch: the unit "in, scan line 5 scan = shell" data line 6 into the open = is the switch unit is turned on after the storage unit is charged: f in: memory unit 3 (children, then store the negative voltage Vlj in storage, If the image data is J bright, then store zero voltage GND in the shadow: the data is not in the process, the scan line potential is negative potential X :!:, (4) Line scan bit = If after all scanning actions, the power line 7 is powered Then, the organic light-emitting diode 4 storing the negative power ^VL in the storage unit 3 device 20 is illuminated. Sanshi; t see "the 3rd, 1st, 3-2th diagram", which is the first motion of the present invention. The single pixel device of the organic light emitting diode display shows the timing chart of the driving voltage waveform of the first drawing. As shown in the figure: the digital driving method of the active organic light emitting diode display and the main driving method I-year-old child of the day (η : β ^ 1 , "4» ~ 1285867 five, invention description 7) The organic light-emitting diode (〇LED) 4, which is composed of 3 〇 and 4 每一 for each pixel device, adopts a common cathode grounding method, and uses the γ potential of the control power line to realize the writing and brightening separation ( P r 0 gram D isp ^ 3 7 SePa ra t ed) The digital driving architecture, when the input image data is input, the potential of the power line 7 is connected to the zero potential (g ND ), so that the organic light emitting diode 4 cannot be illuminated. The potential of the output image is connected to the positive potential VH', so that the organic: light: two = the method described in the present invention. ("η" unit, I Ϊ: a switch unit 1, a drive unit 2 - storing the above-mentioned machine - photodiodes (.〇L, D) 4; its dip Μ TM 2 1 early 兀 1 can be a P-channel thin film transistor (TFT), this "input 1; 12 each has a sweep connection η〇5 and - data line (3)..."η

The thin film transistor (tf", the y? input terminal 21 is connected to the power supply line ("PPL ^ τ . ^ 7, and the other end of the wheel end 22 and the output terminal 13 of the above-mentioned switch TM 701" 4; switch early in the library unit 3 is from the capacitor 1 of the wheel end 1 3 and the drive unit 2 on the J ' end is connected to the switch single, one end is connected to the adjacent pixel == = end 22 Connection, the other organic light-emitting diode package LLvm4 drive unit 2 output terminal 2 3 connection D) 4 input terminal 4 1 is connected with the above fine J d, and organic light-emitting diode (Qlj 1285867 V, invention description (8) The output terminal of the £1:>)4 is 4 2 grounded; when the device scans the image data, the electric potential, the potential GND, and the organic light-emitting diode unit 1 are turned on, and the image data is turned off. 1 , after scanning by scan line 5, but also after the switch unit is turned on, the storage unit is charged brightly, = stored zero voltage GND is not sent in the storage unit ~ then the store is storing positive voltage V Η in the process of storing the scan line The potential is zero potential GND Bay J is a positive potential VH, and all scanning operations are to be completed - ο 电位 potential VH The organic light-emitting diodes of the present invention are only applicable to the preferred embodiment of the present invention, that is, the variations and modifications according to the application of the present invention are all too smoked. Ming* Τ月白冯 The scope of the invention patent line 7 of the power 4 can not be brightened by the data line 6 stored in the storage list) 'If the image 3, if the film 3; in, after other scans, the electricity The voltage GND body 4 is lit. Yes, it is not covered by the scope of patents. Bit is connected to , the switch enters in the open element 3 (the data is the image data is the potential source line of the execution scan line '7 on the storage list to limit the equivalent of this

1285867 Brief Description of the Drawings [Simple Description of the Drawings] Dipoles Figures 1 - 1 are schematic views of a single pixel device of the active organic light-emitting display of the first embodiment of the present invention. Figure 1–2 is a timing diagram of the driving voltage waveforms in Figures 1–1. 2 to 1 are schematic views of a second embodiment of the present invention. Figure 2-2 is a timing diagram of the driving voltage waveforms in Figure 2-1. Fig. 3-1 is a schematic view showing a third embodiment of the present invention. Figure 3-2 shows the timing diagram of the driving voltage waveform in Figure 3_1. [Description of the label] Alizarin device......·10, 20, 30, 40 4 Input terminal........11,12,21,22, output terminal..... ...13,23,42 Switch unit.......1 Drive unit.......2 Storage unit.......3 Organic light-emitting diode····4 Scanning line ········ 5,8 Data line.......6 Power cord........7 Positive potential........V Η

Negative potential........V L

Zero potential........GND

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Claims (1)

1285867 ------— VI. Patent application scope 1. A digital driving device for an active organic light emitting diode display, the display is composed of a plurality of halogen devices, each of which includes: a switch The unit has two input ends and one output end, and the two input ends respectively connect the data line and the scan line; the mountain one drive unit has two input ends and one output end, and the two input ends respectively correspond to the power line And the output end of the above switch unit is connected; the door is connected to the second storage i element 'the upper end is grounded, and the other end is connected to the output end of the switch and the input end of the drive unit; I two organic light emitting two The pole body has an input end and an output end, the input end is connected to the output end of the driving unit, and the output end is grounded. When the pixel device scans the image data, the electric potential is zero potential, and the organic light is emitted. The diode can't be lit', and the connection is now turned on. At this time, the image data is entered by the data line after the ^_兀 is scanned by the scan line, and stored in the storage unit ^ early*, then Store zero voltage on the bill of materials = silly? The image data is bright and stored in the storage unit, and is to be completed. If the material is not shelled, the potential of the source line is connected to the positive potential, and after storage and operation, the organic light-emitting diode of the electroporation device is used. Shine. The voltage driving device is the digital driving device of the polar body display according to the second aspect of the invention, wherein the 勖-type organic light-emitting two-scanning line potential is zero potential, and the other scanning & 3. The positive potential as described in the scope of the patent application: Digital display device for the polar body display, the composite organic light-emitting device, the switch unit and the drive list 1285867 VI. Patent Application Scope The element can be a P-channel thin film transistor (TFT). 4. The digital driving device of the active organic light-emitting two display device of claim i, wherein the storage unit is formed by a capacitor. The body is composed of a body. ~ 5, = digital drive device for active organic light-emitting diode display, this display is composed of a plurality of pixel devices, each pixel device including ·····, mountain, m70′ Two input ends and one round output end, the two inputs are respectively connected to the data line and the scan line; a driving unit having two input ends and one end of the output end of the switch unit is connected, and the month is connected to the switch unit The output 丄, the other end is connected to an organic light-emitting diode, which has a wheel-in connection; the input end and the output end of the drive unit are connected to the second end and the output end, when the pixel device is in scanning And; the grounding of the outlet; to the zero potential, so that the organic light-emitting diode is not: ^ the potential of the source line is connected to the current conduction state, at this time the image data is;; t shell, the switch unit is scanned by the scan line, And stored in the storage list; ^ line enters the switch unit, 'stores the negative voltage in the storage unit. If the image data is bright, store zero voltage in the storage unit t, wait for * image data is not bright, then the source line The potential is connected to the positive Bit, and: After eclipse all scanning actions, the organic light-emitting diode of the electro-pixel device is stored in a negative voltage in the storage unit~ please patent the first item%... (Active Proactive Organic Light II) 16 pages, the patent scope of the armor -_______ The digital display device of the polar body display, in which the scanning J potential is a negative potential, and the other scanning lines are electrically "in the process, = active active organic light emitting diode display ^, bit. The display is composed of a plurality of pixel devices: each input/two switch unit has two input ends and one round rim respectively connected to the data line and the scan line; and the other two drive units have The two input terminals and one input code respectively are connected with the above power supply line and the domain=end 'the two input-storage units, and are connected with one round of the output terminal; the connection line with the input end of the driving unit, and the scanning line of the output end of the closed unit, · Otherly connected to an adjacent organic device, an organic light emitting diode, and an input end connected to the output end of the driving unit 2: two: and the wheel end, when the pixel device is scanning The source is connected to the ground; to the zero potential, the potential of the organic light-emitting two source line is connected to the current f-pass state, and the image data is data line: redundant 'the switch unit is scanned by the scan line, and stored in the storage Single _,,, t in the switch unit, 'store zero voltage in the storage unit Yin, = inside' If the image data is bright and store positive voltage in the storage unit, = image is not illuminated, then the source line The potential is connected to the positive potential, and: after all the scanning operations of the green, the organic light-emitting diode of the electroporation device is stored and stored at zero voltage in the storage unit, as in the patent scope, item 7X, the digit display of the polar body display The driving device, the active organic light emitting device 2, in the process of performing the sweeping process, 1285867 6. The patented range scans the voltage = the potential of the other scanning lines is a positive potential. The method is mainly composed of plural = ; = ; = display: the J-bit driving square of the device: the potential of the line is connected to the zero potential, so that the organic light is emitted, and the method is redundant. When the image data is output, the power line is The potential is connected to the positive potential '俾 to make the organic light-emitting diode bright. The digital driving method of the active organic light emitting diode display according to claim 9, wherein the organic light emitting diode (〇LED) of each halogen device can be grounded by common cathode . Page 18