CN202948702U - Pixel structure, pixel unit structure, display panel and display device - Google Patents
Pixel structure, pixel unit structure, display panel and display device Download PDFInfo
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- CN202948702U CN202948702U CN201220690869XU CN201220690869U CN202948702U CN 202948702 U CN202948702 U CN 202948702U CN 201220690869X U CN201220690869X U CN 201220690869XU CN 201220690869 U CN201220690869 U CN 201220690869U CN 202948702 U CN202948702 U CN 202948702U
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Abstract
The utility model provides a pixel structure, a pixel unit structure, a display panel and a display device and aims to improve the electro-optical efficiency of the display device. The pixel structure comprises a pixel active drive circuit and at least two serially connected luminescent devices both connected with the pixel active drive circuit. The luminescent devices together form a luminescent device assembly and are driven to emit light by the pixel active drive circuit.
Description
Technical field
The utility model relates to organic luminescence technology field, relates in particular to a kind of dot structure, pixel cell structure, display panel and display device.
Background technology
Organic light emitting display because of its have all solid state, active illuminating, high-contrast, ultra-thin, low-power consumption, wide viewing angle, fast response time, working range wide, be easy to realize flexible the demonstration and the plurality of advantages such as 3D demonstration, be called as dreamlike display of future generation.Simultaneously, but because luminescent device has the large tracts of land film forming, can become desirable large scale panel display apparatus.Using wider luminescent device at present is Organic Light Emitting Diode (Organic Light Emitting Diode, OLED).Large scale organic light-emitting display device by OLED makes as OLED colour television set, OLED panel computer, becomes the target of each manufacturer's pursuit at present.
The drive current that the luminous needs of luminescent device are certain, this electric current is provided by peripheral circuit usually, and for example reference voltage source provides certain voltage VDD, offers luminescent device by the pixel active driving circuit on organic electroluminescence display panel.Along with the increase of organic light-emitting display device size, the wiring of pixel active driving circuit increases, and the cloth line resistance also increases thereupon, and the voltage drop (IR Drop) that the cloth line resistance produces increases.But the luminous not contribution of IR Drop to luminescent device scattered and disappeared but become heat power consumption, not only reduced the electrical efficiency of display device, increases power consumption, and affects the display effect of display device.
In the color display technology field, a pixel cell comprises three pixels of red, green, blue.In existing mainstream technology, be to simplify circuit, the luminescent device of the red, green, blue pixel in pixel cell is by single voltage source V
DD-V
SSProvide to drive and realize luminously, because the work predeterminated voltage of the luminescent device of different colours is usually different, for example, the operating voltage of blue luminescent device is higher, and operating voltage red and green light emitting device is hanged down.When apply identical supply voltage V for the pixel active driving circuit
DD-V
SSThe time, for guaranteeing the white balance Display Realization, pixel driver supply voltage V
DD-V
SSMust press the operating voltage setting of blue-light device.In the situation that blue luminescent device can work, because the default operating voltage of red and green light emitting device is lower, need to significantly share the voltage that exceeds device work predeterminated voltage amplitude by the driving transistors that arranges in the pixel active driving circuit, the luminescent device of three colors is all worked, by the intensity formation white balance demonstration of proper proportion.But, with respect to the blue light pixel, red, that the green pixel active driving circuit the is interior excessive voltage of sharing of driving transistors and corresponding power consumption, luminous not contribution to luminescent device, scatter and disappear but become heat power consumption, not only reduce the electrical efficiency of display device, and can affect the serviceability of electronic devices and components because the heat in circuit acquires a certain degree, thereby affected the display effect of display device.
The utility model content
The utility model embodiment provides a kind of dot structure, organic electroluminescence display panel and display device, and the voltage drop in order to the cloth line resistance that reduces in dot structure produces reduces heat power consumption to the loss of energy, improves the electrical efficiency of display device.
The dot structure that the utility model embodiment provides comprises: comprise the pixel active driving circuit, also comprise at least two luminescent devices of mutually connecting that are connected with described pixel active driving circuit, described luminescent device consists of the luminescent device group, and it is luminous that described pixel active driving circuit drives described luminescent device.
Preferably, the luminescent device of described mutual series connection is emitting red light device, green light emitting device or blue luminescent device.
Preferably, described luminescent device is Organic Light Emitting Diode.
Preferably, the light-emitting area of the luminescent device of described mutual series connection is identical.
Preferably, described pixel active driving circuit comprises first end and the second end, first end is connected with the first reference voltage source, and the second end is connected with the second reference voltage source, and the luminescent device of described mutual series connection is arranged on pixel active driving circuit first end or the second end; Perhaps be separately positioned on first end and second end of pixel active driving circuit.
Preferably, the described first end of pixel active driving circuit and/or the luminescent device that the second end is connected mutually of being arranged on, when more than one of the luminescent device that is arranged at a certain end, the negative electrode of the anode of luminescent device and another adjacent luminescent device is electrical connected.
Preferably, when more than one of the luminescent device that is arranged at a certain end, the luminescent device of series connection comprises mutually:
Substrate; Be positioned at the first anode and second anode that the same layer on described substrate arranges; Lay respectively at the first organic luminous layer and the second organic luminous layer that arrange with layer on the described first anode and second anode; Lay respectively at the first negative electrode and the second negative electrode that arrange with layer on described the first organic luminous layer and the second organic luminous layer; Perhaps
The luminescent device of series connection comprises substrate mutually; Be positioned at the first negative electrode and the second negative electrode that arrange with layer on described substrate; Lay respectively at the first organic luminous layer and the second organic luminous layer that arrange with layer on described the first negative electrode and the second negative electrode; Lay respectively at the first anode and the second anode that arrange with layer on described the first organic luminous layer and the second organic luminous layer;
The described first anode and the second negative electrode are electrical connected.
The utility model embodiment provides a kind of pixel cell structure, comprises three dot structures of red, green, blue, and three dot structures of described red, green, blue are one of at least above-mentioned dot structure.
The utility model embodiment provides a kind of organic electroluminescence display panel, comprises described pixel cell structure.
Preferably, in each pixel cell structure, the number of emitting red light device, green light emitting device and blue luminescent device is incomplete same.
Preferably, the number of described emitting red light device is greater than the number of blue luminescent device, and the number of green light emitting device is greater than the number of blue luminescent device.
Preferably, in each pixel cell structure, the emitting red light device is 2-5, and green light emitting device is 2-6, blue luminescent device be that 1-3 is individual.
A kind of display device that the utility model embodiment provides comprises above-mentioned display panel.
The dot structure that the utility model embodiment provides, comprise the luminescent device group, each luminescent device group comprises at least two luminescent devices, by more luminescent device dividing potential drop, in the situation that it is constant to drive the luminous power of luminescent device, reduce driving the luminous drive current of luminescent device, reduce the unavailable heat power consumption of the wiring pressure drop in dot structure, improve the electrical efficiency of display device.For example: the luminescent device group is comprised of n luminescent device, and drive current is reduced to the 1/n of the existing required electric current of pixel active driving circuit, and the wiring pressure drop of pixel active driving circuit reduces the 1/n that the heat power consumption that causes is existing wiring pressure drop power consumption
2Greatly reduce the unavailable heat power consumption that the wiring pressure drop brings, improve the electrical efficiency of display device.
Description of drawings
The dot structure schematic diagram that Fig. 1 provides for the utility model embodiment;
One of structural representation of the organic electroluminescence display panel that includes pixel active driving circuit shown in Figure 1 that Fig. 2 provides for the utility model embodiment;
Two of the structural representation of the organic electroluminescence display panel that includes pixel active driving circuit shown in Figure 1 that Fig. 3 provides for the utility model embodiment;
Fig. 4 is existing OLED structural representation;
The OLED structural representation of two cascaded structures that Fig. 5 provides for the utility model embodiment;
Form the OLED schematic top plan view of anode on the substrate that Fig. 6 provides for the utility model embodiment;
Form the OLED schematic top plan view of hole transmission layer on the substrate that Fig. 7 provides for the utility model embodiment;
Form the OLED schematic top plan view of organic luminous layer on the substrate that Fig. 8 provides for the utility model embodiment;
Form the OLED schematic top plan view of electron transfer layer on the substrate that Fig. 9 provides for the utility model embodiment;
Form the OLED schematic top plan view of insulation course on the substrate that Figure 10 provides for the utility model embodiment;
Form the OLED schematic top plan view of negative electrode on the substrate that Figure 11 provides for the utility model embodiment.
Embodiment
A kind of dot structure, organic electroluminescence display panel and display device that the utility model embodiment provides, in order to reduce the voltage drop that in dot structure, pixel active driving circuit cloth line resistance produces, reduce heat power consumption to the loss of energy, improve the electrical efficiency of display device.
Illustrate below by accompanying drawing the technical scheme that the utility model embodiment provides.
Referring to Fig. 1, the dot structure that the utility model embodiment provides comprises:
Pixel active driving circuit 5;
The luminescent device group 6 that is connected with pixel active driving circuit 5; This luminescent device group 6 comprises the luminescent device of at least two series connection, as the luminescent device D1 in Fig. 1 and luminescent device D2.
Pixel active driving circuit 5 is connected with the first reference voltage source 51 in peripheral circuit, and (corresponding voltage can be V for pixel active driving circuit 5 provides drive current
DD); Luminescent device one end is connected with pixel active driving circuit 5, and the other end is connected with the second reference voltage source 52, and (corresponding voltage can be V
SS).
Dot structure shown in Figure 1 can be the dot structure corresponding with red pixel, green pixel or blue pixel.
When the luminescent device group in dot structure is emitting red light set of devices (being that glow color is the luminescent device group that red luminescent device forms), corresponding red pixel; In like manner, when the luminescent device group in dot structure is the green light emitting device group, corresponding green pixel; When the luminescent device group in dot structure is the blue luminescent device group, corresponding blue pixel.
In other words, the luminescent device of series connection is emitting red light device, green light emitting device or blue luminescent device mutually.
Preferably, the described luminescent device of the utility model embodiment can be Organic Light Emitting Diode OLED or other organic luminescent devices (EL).
Preferably, the light-emitting area of the luminescent device of series connection preferably is tending towards identical mutually.
In dot structure shown in Figure 1, in a single day determine when the structure of luminescent device, the operating voltage of luminescent device is definite, and the driving power of the luminescent device of normal operation is only relevant with the drive current that flows through this luminescent device.The utility model embodiment is guaranteeing to need to reduce drive current I under the constant prerequisite of driving power by at least two luminescent devices of series connection mutually are set in each dot structure, the luminescent device of n series connection, and the drive current that needs is (1/n) I.At this moment, in the certain situation of pixel active driving circuit cloth line resistance, the wiring heat power consumption is reduced to original 1/n
2Thereby, the electrical efficiency of raising display device.
The luminescent device of series connection can be adjacent set-up mode shown in Figure 1 mutually, can be also non-conterminous set-up mode shown in Figure 2.Particularly, pixel active driving circuit 5 comprises two ends, first end and the second end, first end is connected with the first reference voltage source 51, the second end is connected with the second reference voltage source 52, the luminescent device of series connection can be arranged on the same end (first end or the second end) of pixel active driving circuit 5 mutually, also can be arranged on the difference end (the part luminescent device is arranged on first end, and the remainder luminescent device is arranged on the second end) of pixel active driving circuit 5.
Referring to Fig. 3, the organic electroluminescence display panel that the utility model embodiment provides comprises pixel cell 4, and each pixel cell comprises the dot structure that is the matrix arrangement;
Particularly, organic electroluminescence display panel comprises:
Each pixel cell comprises red pixel 41, green pixel 42, and blue pixel 43;
Each pixel cell (red pixel 41, green pixel 42, or blue pixel 43) comprises pixel active driving circuit 5 and luminescent device group 6; Luminescent device group 6 is connected with pixel active driving circuit 5; Controlling grid scan line 2 is connected with pixel active driving circuit 5 with data signal line 3;
Peripheral circuit provides reference voltage V for pixel active driving circuit and luminescent device
DDAnd V
SS
Every delegation pixel active driving circuit is connected to same reference voltage source (not shown reference voltage source in Fig. 3), and this reference voltage source provides reference voltage V for each pixel active driving circuit
DD
Luminescent device is luminous under the effect of drive current.
The organic electroluminescence display panel that the below illustrates the utility model embodiment to be provided can reduce the wiring pressure drop, reduces heat power consumption to the loss of energy, improves the principle of the electrical efficiency of display device.
The current cross section of luminescent device and drive current determine the luminous quantity of luminescent device.with a luminescent device be set in each pixel compare, under the prerequisite that realizes identical luminous quantity, namely under the prerequisite of identical driving power, the utility model arranges the luminescent device of at least two series connection in each dot structure, the light-emitting area of each luminescent device becomes original 1/2 at least, correspondingly, the current cross section of each luminescent device becomes original 1/2 at least, because the luminescent device in the luminescent device group is connected in series, the driving power that is to say each luminescent device is P=UI, U is the operating voltage of each luminescent device, I is the electric current that flows through luminescent device.If the luminescent device group comprises n luminescent device, total luminous power P of luminescent device group
Always=nUI, due to luminescent material and the structures shape of operating voltage U because consisting of it of luminescent device, the luminescent device operating voltage of different light-emitting areas is identical.Therefore, when the electric current that flows through luminescent device was original (arranging in the situation of a luminescent device) 1/n, driving power was constant.The cloth line resistance is certain, and ohmically heat power consumption P connects up
Wiring=I
2R is reduced to original 1/n
2That is to say that the utility model only need apply less drive current (the first corresponding less reference voltage V
DD) just can realize the purpose of identical driving power.And reduced the invalid heat power consumption of cloth line resistance, improved the electrical efficiency of display device.
Preferably, referring to Fig. 3, red pixel list 41 comprises the emitting red light set of devices 6 that is in series by emitting red light device D1, D2 and D3; Green pixel 42 comprises the green light emitting device group 6 that is in series by green light emitting device D1, D2 and D3; Blue pixel 43 comprises the blue luminescent device group 6 that is in series by blue luminescent device D1 and D2;
Wherein, in the luminescent device group that (comprises red pixel 41, green pixel 42 and blue pixel 43) in each pixel cell, the number of emitting red light device is greater than the number of blue luminescent device; The number of green light emitting device is greater than the number of blue luminescent device.Such set-up mode not only can reduce the invalid heat power consumption of cloth line resistance, improve the electrical efficiency of display device, but also the luminescent device of suitable quantity is set in can the different pixels in each pixel cell, the operating voltage of luminescent device group is approached as far as possible, take full advantage of supply voltage.
This be because, luminescent device is main luminescent material and the structures shape because consisting of it of operating voltage of Organic Light Emitting Diode OLED for example, the OLED operating voltage of different light-emitting areas is identical or approximate identical; Therefore want to guarantee that red, green, blue OLED works under default operating voltage, existing mainstream technology is shared part voltage by the driving transistors that arranges in the pixel active driving circuit, makes red, green, blue OLED work under default operating voltage.But driving transistors can discharge the pressure drop of self with the form of heat.
Because the pixel of three different colours in each pixel cell is to provide the voltage driving OLED luminous by same the first reference voltage source.That is to say, adopt single voltage source, for the pixel of three different colours in each pixel cell provides voltage.Varying number OLED series system can make the luminescent device group operating voltage in the different pixels structure approach as far as possible, can make like this voltage of different colours pixel-driving circuit consumption all keep reduced levels, reduces ineffective power consumption.
Particularly, because the operating voltage of the luminescent device of different colours is different, present luminescent device, the operating voltage of blue luminescent device is higher than the operating voltage of green and emitting red light device.When applying reference voltage V for the pixel active driving circuit that is connected with emitting red light device, green light emitting device and blue luminescent device simultaneously
DDThe time, be applied to emitting red light set of devices, green light emitting device group in order to make, and in the blue luminescent device group, voltage drop is equal or close, need not driving transistors and excessively come dividing potential drop, the emitting red light device of suitable quantity can proportionally be set, green light emitting device and blue luminescent device reduce the drive current of luminescent device, thereby the voltage V that provides with the first reference voltage source is provided
DDWhen not mating, the unavailable heat power consumption of bringing because of the excessive dividing potential drop of driving transistors.
Preferably, in each pixel cell, the emitting red light device is 2-5, and green light emitting device is 2-6, blue luminescent device be that 1-3 is individual.Cause the larger difference of device operating voltage in view of the materials and devices structure of luminescent device, the quantity of the tandem OLED that can implement is not limited to above-mentioned situation.
Preferably, in each pixel cell, it is identical that the light-emitting area of each emitting red light device preferably is tending towards, and it is identical that the light-emitting area of each green light emitting device preferably is tending towards, and it is identical that the light-emitting area of each blue luminescent device preferably is tending towards.
Need to prove, in the embodiment of the present application, the light-emitting area of indication is identical, is not that absolute area is identical, those skilled in the art should understand that as approximate identical or identical in the fabrication error scope.
The luminescent device group that the utility model embodiment provides can be connected by wire by a plurality of independently luminescent devices, or the interconnected connection of a plurality of luminescent device.
Referring to Fig. 4, be the OLED structural representation.
OLED comprises: substrate 20, anode 21, hole transmission layer 22, organic luminous layer 23, electron transfer layer 24, negative electrode 25.Anode 21 is connected to pixel active driving circuit 5, and negative electrode 25 is connected to reference voltage source Vss.Anode 21 and negative electrode 25 are isolated by insulation course 26.
OLED refers to the organic semiconductor luminescent material under the driving of pixel active driving circuit, and by hole and the electronic injection organic luminous layer 23 of anode 21 and negative electrode 25, and the electronics in organic luminous layer 23 and hole-recombination cause luminous phenomenon.
particularly, for example, utilize metal oxide, as indium tin oxide (ITO, Indium Tin Oxides) transparency electrode, with metal electrode for example silver-colored Ag respectively as anode 21 and the negative electrode 25 of OLED, under certain voltage drives, the hole of the electronics of negative electrode 25 and anode 21 is injected into electron transfer layer 24 and hole transmission layer 22 from negative electrode 25 and anode 21 respectively, electronics and hole move to organic luminous layer 23 through electron transfer layer 24 and hole transmission layer 24 respectively, and the formation exciton that meets in organic luminous layer 23, exciton is emitted energy in the process of depolarization, the light emitting molecule of organic luminous layer is excited, light emitting molecule after exciting is got back to virgin state through radiative relaxation, and emit energy, energy is transmitted into the light-emitting area (light-emitting area can be approximately equal to the current cross section of OLED) of OLED with the form of visible light, for example in Fig. 4, the direction of arrow indication is the exit direction of light.
The OLED of series connection is about to the anode of an OLED and the negative electrode of another OLED is electrically connected.
Particularly, take the structure of two adjacent OLED as the example explanation.
The OLED of series connection comprises mutually:
Substrate; Be positioned at the first anode and second anode that the same layer on described substrate arranges; Lay respectively at the first organic luminous layer and the second organic luminous layer that arrange with layer on the described first anode and second anode; Lay respectively at the first negative electrode and the second negative electrode that arrange with layer on described the first organic luminous layer and the second organic luminous layer; Perhaps
The OLED of series connection comprises substrate mutually; Be positioned at the first negative electrode and the second negative electrode that arrange with layer on described substrate; Lay respectively at the first organic luminous layer and the second organic luminous layer that arrange with layer on described the first negative electrode and the second negative electrode; Lay respectively at the first anode and the second anode that arrange with layer on described the first organic luminous layer and the second organic luminous layer;
The described first anode and the second negative electrode are electrical connected.
Above-mentioned two adjacent OLED are only explanation as an example of the simplest three-layer type OLED example, are only the structures of the OLED of the adjacent mutual series connection of explanation, and OLED can be any existing structure, but the OLED structure that the utility model is connected mutually is preferably identical.
Be two OLED structural representations of the utility model series connection referring to Fig. 5.
The OLED that keeps left in the one OLED(Fig. 5) with the 2nd OLED(Fig. 5 in the OLED that keeps right) be connected by the anode 21 of an OLED and the negative electrode 25 of the 2nd OLED.The negative electrode 25 of the one OLED with V is provided
SSVoltage source be connected, the anode 21 of the 2nd OLED is connected with pixel active driving circuit 5.The structure size of OLED shown in Figure 5 is half of OLED shown in Figure 4, and correspondingly, the current cross section of OLED is also half of OLED current cross section shown in Figure 4.
OLED comprises the luminous or top-illuminating OLED in the end.
The below illustrates the making flow process of the utility model tandem OLED shown in Figure 5 (OLED and the 2nd OLED) take top-illuminating OLED as example, comprises the steps.
1, deposit the certain thickness metal oxide rete of one deck by thermal evaporation method on substrate, by mask, exposure, chemical wet etching technique, form two unequal OLED anode pattern of size.Described metal oxide rete can be indium tin oxide ITO rete, or indium-zinc oxide ITO rete.Two anodes are called the first anode and second anode.Be formed with certain interval between the first anode and second anode.The first anode is connected with the negative electrode of the 2nd OLED; The area of the first anode is connected with the negative electrode of the 2nd OLED is interconnected to guarantee follow-up this first anode greater than the area of the organic luminous layer of an OLED.The first anode 211 on the substrate 1 that forms and second anode 212 vertical views are as shown in Figure 6.
2, deposit the certain thickness conductive film layer of one deck by thermal evaporation method on the substrate that is formed with the first anode 211 and second anode 212, by mask, exposure, chemical wet etching technique, form two equal-sized OLED hole transmission layers.The hole transmission layer that is positioned on the first anode 211 is the first hole transmission layer 221, and the hole transmission layer that is positioned on second anode 212 is the second hole transmission layer 222.The first anode 211 exposed portions serve electrode zones, interconnected to realize with the negative electrode of another OLED in the subsequent technique flow process.Be formed on the first hole transmission layer 221 on substrate 1 and the second hole transmission layer 222 vertical views as shown in Figure 7.
3, deposit one deck luminescent material rete by thermal evaporation method on the substrate that is formed with the first hole transmission layer 221 and the second hole transmission layer 222.By mask, exposure, chemical wet etching technique, form two equal-sized OLED organic luminous layers, be respectively the first organic luminous layer 231 and the second organic luminous layer 232.Be formed on the first organic luminous layer 231 on substrate 1 and the second organic luminous layer 232 vertical views as shown in Figure 8.
4, form electron transfer layer by thermal evaporation method on the substrate 1 that is formed with the first organic luminous layer 231 and the second organic luminous layer 232, the process of formation and formation hole transmission layer are similar, are only that material is different.The first electron transfer layer 241 that forms and the second electron transfer layer 242 are as shown in Figure 9.
5, forming a layer insulating by thermal evaporation method or ion sputtering method, for example SiNx or SiOx rete, by mask, exposure, chemical wet etching technique, the insulation course 26 that formation is positioned at the insulation course 26 of an OLED and the 2nd OLED anode periphery and is positioned at the zone of organic luminous layer 231 side certain widths on the first anode 211, the width that is positioned at the insulation course 26 of organic luminous layer 231 side areas on the first anode 211 leaks the width of part outside less than the first anode 211 that is used for being connected with the second negative electrode 212, and the insulation course 26 of formation as shown in figure 10.
6, deposit the layer of metal rete by thermal evaporation method at the substrate 1 that is formed with insulation course 26, as silver.By mask, exposure, chemical wet etching technique, form two cathode pattern with certain area.Be the first negative electrode 251 and the second negative electrode 252, the first negative electrode 251 of formation and the second negative electrode 252 schematic top plan view, as shown in figure 11.The first negative electrode 251 is used for and V is provided
SSVoltage source be connected, the second negative electrode 252 is used for being connected with the first anode 211 parts of leaking outside, the area that is slightly larger than organic luminous layer that the second negative electrode 252 can arrange is convenient to be electrical connected with the first anode 211.
The utility model is except with above thermal evaporation method film forming, also can be with vacuum evaporation technology (VTE) film forming of precision metallic mask plate (FFM).
Making flow process after the above-mentioned OLED cascaded structure of the utility model and OLED series connection is only take two OLED series connection as the example explanation, in specific implementation process, the more OLED that can connect according to the actual requirements, the unavailable heat power consumption of bringing to reduce the wiring pressure drop improves the electrical efficiency of display device.The utility model is only explanation as an example of top-illuminating OLED example, and end illuminating OLED is also same reason, and manufacturing process is similar, repeats no more here.
Based on same design utility model, the utility model embodiment also provides a kind of display device, comprises above-mentioned pixel active driving circuit.This display device can be the display device such as ORGANIC ELECTROLUMINESCENCE DISPLAYS oled panel, OLED display, OLED TV or OLED Electronic Paper.
The organic electroluminescence display panel that the utility model embodiment provides, by the luminescent device group is set in each pixel, each luminescent device group comprises at least two luminescent devices, by the luminescent device dividing potential drop, need not to arrange the transistor of dividing potential drop, improved the electrical efficiency of display device.For example: the luminescent device group is comprised of n luminescent device.The current cross section of OLED can be set to the 1/n in existing pixel active driving circuit OLED cross section.Can be so that drive current be reduced to the 1/n of the existing required electric current of pixel active driving circuit.At this moment, the wiring pressure drop of pixel active driving circuit reduces the 1/n that the power consumption that causes is existing wiring pressure drop power consumption
2Greatly reduce the unavailable heat power consumption that the wiring pressure drop brings, improve the electrical efficiency of display device.
Obviously, those skilled in the art can carry out various changes and modification and not break away from spirit and scope of the present utility model the utility model.Like this, if within of the present utility model these are revised and modification belongs to the scope of the utility model claim and equivalent technologies thereof, the utility model also is intended to comprise these changes and modification interior.
Claims (13)
1. dot structure, comprise the pixel active driving circuit, it is characterized in that, also comprise at least two luminescent devices of mutually connecting that are connected with described pixel active driving circuit, described luminescent device consists of the luminescent device group, and it is luminous that described pixel active driving circuit drives described luminescent device.
2. dot structure according to claim 1, is characterized in that, the luminescent device of described mutual series connection is emitting red light device, green light emitting device or blue luminescent device.
3. dot structure according to claim 1, is characterized in that, described luminescent device is Organic Light Emitting Diode.
4. dot structure according to claim 1, is characterized in that, the light-emitting area of the luminescent device of described mutual series connection is identical.
5. dot structure according to claim 1, it is characterized in that, described pixel active driving circuit comprises first end and the second end, first end is connected with the first reference voltage source, the second end is connected with the second reference voltage source, and the luminescent device of described mutual series connection is arranged on pixel active driving circuit first end or the second end; Perhaps be separately positioned on first end and second end of pixel active driving circuit.
6. dot structure according to claim 5, it is characterized in that, the described first end of pixel active driving circuit and/or the luminescent device that the second end is connected mutually of being arranged on, when more than one of the luminescent device that is arranged at a certain end, the negative electrode of the anode of luminescent device and another adjacent luminescent device is electrical connected.
7. dot structure according to claim 6, is characterized in that, when more than one of the luminescent device that is arranged at a certain end, the luminescent device of series connection comprises mutually:
Substrate; Be positioned at the first anode and second anode that the same layer on described substrate arranges; Lay respectively at the first organic luminous layer and the second organic luminous layer that arrange with layer on the described first anode and second anode; Lay respectively at the first negative electrode and the second negative electrode that arrange with layer on described the first organic luminous layer and the second organic luminous layer; Perhaps
The luminescent device of series connection comprises substrate mutually; Be positioned at the first negative electrode and the second negative electrode that arrange with layer on described substrate; Lay respectively at the first organic luminous layer and the second organic luminous layer that arrange with layer on described the first negative electrode and the second negative electrode; Lay respectively at the first anode and the second anode that arrange with layer on described the first organic luminous layer and the second organic luminous layer;
The described first anode and the second negative electrode are electrical connected.
8. a pixel cell structure, comprise three dot structures of red, green, blue, it is characterized in that, three dot structures of described red, green, blue are one of at least the described dot structure of the arbitrary claim of claim 1 to 7.
9. an organic electroluminescence display panel, is characterized in that, comprises pixel cell structure claimed in claim 8.
10. display panel according to claim 9, is characterized in that, in each pixel cell structure, the number of emitting red light device, green light emitting device and blue luminescent device is incomplete same.
11. display panel according to claim 10 is characterized in that, the number of described emitting red light device is greater than the number of blue luminescent device, and the number of green light emitting device is greater than the number of blue luminescent device.
12. display panel according to claim 11 is characterized in that, in each pixel cell structure, the emitting red light device is 2-5, and green light emitting device is 2-6, blue luminescent device be that 1-3 is individual.
13. a display device is characterized in that, comprises the described display panel of the arbitrary claim of claim 9-12.
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| CN103021334A (en) * | 2012-12-13 | 2013-04-03 | 京东方科技集团股份有限公司 | Pixel structure, pixel unit structure, display panel and display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103021334A (en) * | 2012-12-13 | 2013-04-03 | 京东方科技集团股份有限公司 | Pixel structure, pixel unit structure, display panel and display device |
| US9570532B2 (en) | 2012-12-13 | 2017-02-14 | Boe Technology Group Co., Ltd. | Pixel structure, display panel and display apparatus |
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