US20190285932A1 - Structure of goa circuit - Google Patents
Structure of goa circuit Download PDFInfo
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- US20190285932A1 US20190285932A1 US16/427,284 US201916427284A US2019285932A1 US 20190285932 A1 US20190285932 A1 US 20190285932A1 US 201916427284 A US201916427284 A US 201916427284A US 2019285932 A1 US2019285932 A1 US 2019285932A1
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- goa circuit
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Classifications
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- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
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- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
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- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
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- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
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- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
- H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body
- H01L27/1214—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
- H01L27/1218—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs with a particular composition or structure of the substrate
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- H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body
- H01L27/1214—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
- H01L27/124—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs with a particular composition, shape or layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits
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- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/41—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions
- H01L29/417—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions carrying the current to be rectified, amplified or switched
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- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/41—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions
- H01L29/423—Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions not carrying the current to be rectified, amplified or switched
- H01L29/42312—Gate electrodes for field effect devices
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- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
- G02F2201/42—Arrangements for providing conduction through an insulating substrate
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Definitions
- the present invention relates to the field of display techniques, and in particular to a structure of gate on array (GOA) circuit.
- GOA gate on array
- the liquid crystal display provides many advantages, such as thinness, low power-consumption and no radiation, and is widely used in, such as, LCD televisions, mobile phones, personal digital assistants (PDAs), digital cameras, computer screens, laptop screens, and so on.
- LCD also dominates the field of panel displays.
- LCDs on the current market are of backlight type, which comprises an LCD panel and a backlight module.
- the operation theory behind LCD is to inject the liquid crystal (LC) molecules between a thin film transistor (TFT) array substrate and a color filter (CF) substrate, and applies a driving voltage between the two substrates to control the rotation direction of the LC molecules to refract the light from the backlight module to generate the display on the screen.
- TFT thin film transistor
- CF color filter
- the active matrix liquid crystal display is the most commonly used liquid crystal display, which comprises a plurality of pixels, each pixel is controlled by a TFT, the gate of the TFT is connected to a scan line in a horizontal direction, the drain is connected to a data line in a vertical direction, and the source is connected to a corresponding pixel electrode.
- AMLCD active matrix liquid crystal display
- the driving of the horizontal scan line (i.e., gate driving) of the AMLCD horizontal is initially executed by an external integrated circuit (IC).
- the external IC can control the charge and discharge of the horizontal scan line in each stage progressively.
- the gate driver on array (GOA) technology i.e., the array substrate column driving technology, can use the array process of the LCD panel to manufacture the driver circuit of the horizontal scan lines on the substrate at area surrounding the active area to replace the external IC for driving the horizontal scan lines.
- the GOA technology can reduce the bonding process for external IC and has the opportunity to enhance yield rate and reduce production cost, as well as make the LCD panel more suitable for the production of narrow border display products.
- the resolution of the display is also higher and higher.
- the higher the resolution of the display the high the number of the stages of GOA circuit is required, and more routing area is occupied, which needs wider display panel border, and is not suitable for the realization of ultra-narrow border or borderless display panel.
- the GOA circuit lost the advantages in the production of narrow border display product.
- the object of the present invention is to provide a structure of GOA circuit, able to reduce the routing area required by the GOA circuit to reduce the width of non-active area of LCD to achieve ultra-narrow border borderless display.
- the present invention provides a structure of GOA circuit, which comprises: a flexible substrate, a first thin film transistor (TFT) layer disposed on the front side of the flexible substrate, a second TFT disposed on the back side of the flexible substrate, and a plurality of wires passing through a plurality of holes on the flexible substrate to electrically connected the first TFT layer and the second TFT layer respectively.
- TFT thin film transistor
- the material of the flexible substrate is polyimide, polyethylene terephthalate, cycloolefin copolymer, or polyether resin.
- the thickness of the flexible substrate is 10-300 ⁇ m.
- both the first TFT layer and the second TFT layer comprise at least a TFT, and each TFT comprises a gate disposed on the flexible substrate, a gate insulation layer covering the gate, a semiconductor layer disposed on the gate insulation layer on the gate, and a source and a drain disposed on the gate insulation layer and contacting respectively the two ends of the semiconductor layer.
- the plurality of holes and the plurality of wires are in a one-to-one correspondence, with each hole disposed with a wire.
- each hole is disposed with at least two wires, and each wire in the same hole is separated from the others by an insulation layer.
- the second TFT layer and the wires disposed on the back side of the flexible substrate are covered with a protective layer.
- the material for the protective layer is silicon oxide.
- the plurality of holes is formed by a laser drilling process or a chemical etching process.
- the wires are made of copper or grapheme.
- Another embodiment of the present invention provides a structure of GOA circuit, which comprises: a flexible substrate, a first thin film transistor (TFT) layer disposed on the front side of the flexible substrate, a second TFT disposed on the back side of the flexible substrate, and a plurality of wires passing through a plurality of holes on the flexible substrate to electrically connected the first TFT layer and the second TFT layer respectively;
- TFT thin film transistor
- the material of the flexible substrate being polyimide, polyethylene terephthalate, cycloolefin copolymer, or polyether resin;
- the thickness of the flexible substrate is 10-300 ⁇ m.
- the present invention provides a structure of GOA circuit, which is manufactured on both sides of the ultra-thin flexible substrate with holes, wherein the wires pass through the holes to connect the TFTs in the GOA circuit on the front side to the TFTs in the GOA circuit on the back side to reduce the area occupied by GOA circuit.
- the circuit area utilization is improved so that the same size of substrate area can carry almost twice the circuit structure to reduce the border width of the non-active area to achieve borderless or ultra-narrow border display panel with high resolution.
- FIG. 1 is a front view showing a structure of GOA circuit provided by the first embodiment of the present invention
- FIG. 2 is a back view showing a structure of GOA circuit provided by the first embodiment of the present invention
- FIG. 3 is a cross-sectional view showing a structure of GOA circuit provided by the second embodiment of the present invention.
- the present invention provides a structure of GOA circuit, which comprises: a flexible substrate 1 , a first thin film transistor (TFT) layer 2 disposed on the front side of the flexible substrate 1 , a second TFT 3 disposed on the back side of the flexible substrate 1 , and a plurality of wires 5 passing through a plurality of holes 4 on the flexible substrate 1 to electrically connected the first TFT layer 2 and the second TFT layer 3 respectively.
- TFT thin film transistor
- the connections between the first TFT layer 2 and the second TFT layer 3 need a plurality of wires 5 for transporting different signals.
- the wires 5 transporting different signals can be, as shown in FIG. 1 and FIG. 2 , a plurality of wires separated by insulation layer in the same hole 4 to transport different signals (i.e., a multi-layer metal structure in the hole 4 ), or as shown in FIG. 3 , each hole corresponds to a wire 5 only, and the wires 5 for different signals are disposed separately (i.e., each hole 4 only comprises a single metal layer structure.)
- the first embodiment of the present invention adopts the approach that a plurality of wires separated by insulation layer in the same hole 4 , which is a typical 4T structure GOA circuit, comprising: a first TFT T 1 , a second TFT T 2 , a third TFT T 3 and a fourth TFT T 4 , wherein the first TFT T 1 and the second TFT T 2 are located at the first TFT layer 2 formed on the front side of the flexible substrate 1 , and the third TFT T 3 and the fourth TFT T 4 are located at the second TFT layer 3 formed on the back side of the flexible substrate 1 .
- a typical 4T structure GOA circuit comprising: a first TFT T 1 , a second TFT T 2 , a third TFT T 3 and a fourth TFT T 4 , wherein the first TFT T 1 and the second TFT T 2 are located at the first TFT layer 2 formed on the front side of the flexible substrate 1 , and the third TFT T 3 and the fourth TFT T 4 are located at the
- the flexible substrate 1 is disposed with a hole 4 , and the hole 4 is disposed with two wires 5 , with one of the wires 5 passing through the hole 4 to connect the drain of the first TFT t 1 to the source of the fourth TFT T 4 , and the other also passing through the hole 4 to connect the drain of the second TFT T 2 to the source of the third TFT T 3 and the gate of the fourth TFT T 4 .
- the two wires 5 are separated by an insulation layer (not shown).
- the second embodiment of the present invention adopts the approach that each hole 4 is disposed with a single wire 5 .
- the second embodiment shows a preferred TFT structure of the present invention, comprising: a gate 21 disposed on the flexible substrate 1 , a gate insulation layer 22 covering the gate 21 , a semiconductor layer 23 disposed on the gate insulation layer 22 on the gate 21 , and a source 24 and a drain 25 disposed on the gate insulation layer 22 and contacting respectively the two ends of the semiconductor layer 23 . As shown in FIG.
- the wire 5 for connecting the gates 21 of the two TFTs on the front side and back side of the flexible substrate 1 , and the wire 5 for connecting the drain 25 of the two TFTs on the front side and back side of the flexible substrate 1 are located in different holes 4 .
- TFT structure shown in the second embodiment can also be applied to the first embodiment.
- the present invention can also use other TFT structure, without affecting the realization of the present invention.
- the material of the flexible substrate is polyimide, polyethylene terephthalate, cycloolefin copolymer, or polyether resin; and the thickness of the flexible substrate is 10-300 ⁇ m.
- the present invention adopts double-sided circuit structure and the holes 4 are formed on the flexible substrate 1 for the wires 5 to pass through to connect circuits on both sides. Therefore, the present invention adopts the flexible substrate 1 , which is much thinner than the conventional glass substrate, to ensure the required number of holes 4 to be formed during the flexible substrate manufacturing process, as well as the conductivity of the wires 5 .
- the plurality of holes 4 is formed by a laser drilling process or a chemical etching process; and the wires 5 are made of copper or grapheme, or other metal or semiconductors with good conductivity.
- the second TFT layer 3 and the wires 5 disposed on the back side of the flexible substrate 1 are covered with a protective layer, wherein the material for the protective layer is silicon oxide (SiOx), or other oxide.
- the present invention provides a structure of GOA circuit, which is manufactured on both sides of the ultra-thin flexible substrate with holes, wherein the wires pass through the holes to connect the TFTs in the GOA circuit on the front side to the TFTs in the GOA circuit on the back side to reduce the area occupied by GOA circuit.
- the circuit area utilization is improved so that the same size of substrate area can carry almost twice the circuit structure to reduce the border width of the non-active area to achieve borderless or ultra-narrow border display panel with high resolution.
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Abstract
Description
- This is a divisional application of co-pending U.S. patent application Ser. No. 15/503,707, filed on Feb. 13, 2017, which is a national stage of PCT Application No. PCT/CN2016/112257, filed on Dec. 27, 2016, claiming foreign priority of Chinese Patent Application No. 201611184559.X, filed on Dec. 20, 2016.
- The present invention relates to the field of display techniques, and in particular to a structure of gate on array (GOA) circuit.
- The liquid crystal display (LCD) provides many advantages, such as thinness, low power-consumption and no radiation, and is widely used in, such as, LCD televisions, mobile phones, personal digital assistants (PDAs), digital cameras, computer screens, laptop screens, and so on. The LCD also dominates the field of panel displays.
- Most of the LCDs on the current market are of backlight type, which comprises an LCD panel and a backlight module. The operation theory behind LCD is to inject the liquid crystal (LC) molecules between a thin film transistor (TFT) array substrate and a color filter (CF) substrate, and applies a driving voltage between the two substrates to control the rotation direction of the LC molecules to refract the light from the backlight module to generate the display on the screen.
- The active matrix liquid crystal display (AMLCD) is the most commonly used liquid crystal display, which comprises a plurality of pixels, each pixel is controlled by a TFT, the gate of the TFT is connected to a scan line in a horizontal direction, the drain is connected to a data line in a vertical direction, and the source is connected to a corresponding pixel electrode. When a sufficient positive voltage is applied to a scan line in the horizontal direction, all of the TFTs connected to the scan line are turned on, the data signal voltage loaded on the data line is written into the pixel electrode to control the transmittance of different liquid crystals to achieve the effect of color control.
- The driving of the horizontal scan line (i.e., gate driving) of the AMLCD horizontal is initially executed by an external integrated circuit (IC). The external IC can control the charge and discharge of the horizontal scan line in each stage progressively. The gate driver on array (GOA) technology, i.e., the array substrate column driving technology, can use the array process of the LCD panel to manufacture the driver circuit of the horizontal scan lines on the substrate at area surrounding the active area to replace the external IC for driving the horizontal scan lines. The GOA technology can reduce the bonding process for external IC and has the opportunity to enhance yield rate and reduce production cost, as well as make the LCD panel more suitable for the production of narrow border display products.
- As the display technology progresses, the resolution of the display is also higher and higher. For the displays of the same size, the higher the resolution of the display, the high the number of the stages of GOA circuit is required, and more routing area is occupied, which needs wider display panel border, and is not suitable for the realization of ultra-narrow border or borderless display panel. As a result, the GOA circuit lost the advantages in the production of narrow border display product.
- The object of the present invention is to provide a structure of GOA circuit, able to reduce the routing area required by the GOA circuit to reduce the width of non-active area of LCD to achieve ultra-narrow border borderless display.
- To achieve the above object, the present invention provides a structure of GOA circuit, which comprises: a flexible substrate, a first thin film transistor (TFT) layer disposed on the front side of the flexible substrate, a second TFT disposed on the back side of the flexible substrate, and a plurality of wires passing through a plurality of holes on the flexible substrate to electrically connected the first TFT layer and the second TFT layer respectively.
- According to a preferred embodiment of the present invention, the material of the flexible substrate is polyimide, polyethylene terephthalate, cycloolefin copolymer, or polyether resin.
- According to a preferred embodiment of the present invention, the thickness of the flexible substrate is 10-300 μm.
- According to a preferred embodiment of the present invention, both the first TFT layer and the second TFT layer comprise at least a TFT, and each TFT comprises a gate disposed on the flexible substrate, a gate insulation layer covering the gate, a semiconductor layer disposed on the gate insulation layer on the gate, and a source and a drain disposed on the gate insulation layer and contacting respectively the two ends of the semiconductor layer.
- According to a preferred embodiment of the present invention, the plurality of holes and the plurality of wires are in a one-to-one correspondence, with each hole disposed with a wire.
- According to a preferred embodiment of the present invention, each hole is disposed with at least two wires, and each wire in the same hole is separated from the others by an insulation layer.
- According to a preferred embodiment of the present invention, the second TFT layer and the wires disposed on the back side of the flexible substrate are covered with a protective layer.
- According to a preferred embodiment of the present invention, the material for the protective layer is silicon oxide.
- According to a preferred embodiment of the present invention, the plurality of holes is formed by a laser drilling process or a chemical etching process.
- According to a preferred embodiment of the present invention, the wires are made of copper or grapheme.
- Another embodiment of the present invention provides a structure of GOA circuit, which comprises: a flexible substrate, a first thin film transistor (TFT) layer disposed on the front side of the flexible substrate, a second TFT disposed on the back side of the flexible substrate, and a plurality of wires passing through a plurality of holes on the flexible substrate to electrically connected the first TFT layer and the second TFT layer respectively;
- wherein the material of the flexible substrate being polyimide, polyethylene terephthalate, cycloolefin copolymer, or polyether resin;
- wherein the thickness of the flexible substrate is 10-300 μm.
- Compared to the known techniques, the present invention provides the following advantages. The present invention provides a structure of GOA circuit, which is manufactured on both sides of the ultra-thin flexible substrate with holes, wherein the wires pass through the holes to connect the TFTs in the GOA circuit on the front side to the TFTs in the GOA circuit on the back side to reduce the area occupied by GOA circuit. As such, the circuit area utilization is improved so that the same size of substrate area can carry almost twice the circuit structure to reduce the border width of the non-active area to achieve borderless or ultra-narrow border display panel with high resolution.
- To make the technical solution of the embodiments according to the present invention, a brief description of the drawings that are necessary for the illustration of the embodiments will be given as follows. Apparently, the drawings described below show only example embodiments of the present invention and for those having ordinary skills in the art, other drawings may be easily obtained from these drawings without paying any creative effort. In the drawings:
-
FIG. 1 is a front view showing a structure of GOA circuit provided by the first embodiment of the present invention; -
FIG. 2 is a back view showing a structure of GOA circuit provided by the first embodiment of the present invention; -
FIG. 3 is a cross-sectional view showing a structure of GOA circuit provided by the second embodiment of the present invention. - To further explain the technique means and effect of the present invention, the following uses preferred embodiments and drawings for detailed description.
- Referring to
FIGS. 1-3 , the present invention provides a structure of GOA circuit, which comprises: aflexible substrate 1, a first thin film transistor (TFT)layer 2 disposed on the front side of theflexible substrate 1, a second TFT 3 disposed on the back side of theflexible substrate 1, and a plurality ofwires 5 passing through a plurality ofholes 4 on theflexible substrate 1 to electrically connected thefirst TFT layer 2 and the second TFT layer 3 respectively. - It should be noted that because a plurality of signal inputs is required for TFT connections, the connections between the
first TFT layer 2 and the second TFT layer 3 need a plurality ofwires 5 for transporting different signals. Thewires 5 transporting different signals can be, as shown inFIG. 1 andFIG. 2 , a plurality of wires separated by insulation layer in thesame hole 4 to transport different signals (i.e., a multi-layer metal structure in the hole 4), or as shown inFIG. 3 , each hole corresponds to awire 5 only, and thewires 5 for different signals are disposed separately (i.e., eachhole 4 only comprises a single metal layer structure.) - Specifically, referring to
FIG. 1 andFIG. 2 , the first embodiment of the present invention adopts the approach that a plurality of wires separated by insulation layer in thesame hole 4, which is a typical 4T structure GOA circuit, comprising: a first TFT T1, a second TFT T2, a third TFT T3 and a fourth TFT T4, wherein the first TFT T1 and the second TFT T2 are located at thefirst TFT layer 2 formed on the front side of theflexible substrate 1, and the third TFT T3 and the fourth TFT T4 are located at the second TFT layer 3 formed on the back side of theflexible substrate 1. Theflexible substrate 1 is disposed with ahole 4, and thehole 4 is disposed with twowires 5, with one of thewires 5 passing through thehole 4 to connect the drain of the first TFT t1 to the source of the fourth TFT T4, and the other also passing through thehole 4 to connect the drain of the second TFT T2 to the source of the third TFT T3 and the gate of the fourth TFT T4. The twowires 5 are separated by an insulation layer (not shown). - Specifically, referring to
FIG. 3 , the second embodiment of the present invention adopts the approach that eachhole 4 is disposed with asingle wire 5. The second embodiment shows a preferred TFT structure of the present invention, comprising: agate 21 disposed on theflexible substrate 1, agate insulation layer 22 covering thegate 21, asemiconductor layer 23 disposed on thegate insulation layer 22 on thegate 21, and asource 24 and adrain 25 disposed on thegate insulation layer 22 and contacting respectively the two ends of thesemiconductor layer 23. As shown inFIG. 3 , thewire 5 for connecting thegates 21 of the two TFTs on the front side and back side of theflexible substrate 1, and thewire 5 for connecting thedrain 25 of the two TFTs on the front side and back side of theflexible substrate 1 are located indifferent holes 4. - It should be noted that the TFT structure shown in the second embodiment can also be applied to the first embodiment. The present invention can also use other TFT structure, without affecting the realization of the present invention.
- Furthermore, the material of the flexible substrate is polyimide, polyethylene terephthalate, cycloolefin copolymer, or polyether resin; and the thickness of the flexible substrate is 10-300 μm. Because the present invention adopts double-sided circuit structure and the
holes 4 are formed on theflexible substrate 1 for thewires 5 to pass through to connect circuits on both sides. Therefore, the present invention adopts theflexible substrate 1, which is much thinner than the conventional glass substrate, to ensure the required number ofholes 4 to be formed during the flexible substrate manufacturing process, as well as the conductivity of thewires 5. The plurality ofholes 4 is formed by a laser drilling process or a chemical etching process; and thewires 5 are made of copper or grapheme, or other metal or semiconductors with good conductivity. - In addition, to protect the circuit on the back side of the
flexible substrate 1, the second TFT layer 3 and thewires 5 disposed on the back side of theflexible substrate 1 are covered with a protective layer, wherein the material for the protective layer is silicon oxide (SiOx), or other oxide. - In summary, the present invention provides a structure of GOA circuit, which is manufactured on both sides of the ultra-thin flexible substrate with holes, wherein the wires pass through the holes to connect the TFTs in the GOA circuit on the front side to the TFTs in the GOA circuit on the back side to reduce the area occupied by GOA circuit. As such, the circuit area utilization is improved so that the same size of substrate area can carry almost twice the circuit structure to reduce the border width of the non-active area to achieve borderless or ultra-narrow border display panel with high resolution.
- It should be noted that in the present disclosure the terms, such as, first, second are only for distinguishing an entity or operation from another entity or operation, and does not imply any specific relation or order between the entities or operations. Also, the terms “comprises”, “include”, and other similar variations, do not exclude the inclusion of other non-listed elements. Without further restrictions, the expression “comprises a . . . ” does not exclude other identical elements from presence besides the listed elements.
- Embodiments of the present invention have been described, but not intending to impose any unduly constraint to the appended claims. Any modification of equivalent structure or equivalent process made according to the disclosure and drawings of the present invention, or any application thereof, directly or indirectly, to other related fields of technique, is considered encompassed in the scope of protection defined by the claim of the present invention.
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US16/427,284 US10429681B1 (en) | 2016-12-20 | 2019-05-30 | Structure of GOA circuit |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111785226A (en) * | 2020-07-08 | 2020-10-16 | Tcl华星光电技术有限公司 | Signal transmission line structure and display panel |
US11051405B2 (en) | 2019-05-07 | 2021-06-29 | Au Optronics Corporation | Flexible display |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106773384A (en) * | 2016-12-20 | 2017-05-31 | 深圳市华星光电技术有限公司 | Goa circuit structure |
TWI676849B (en) | 2018-10-15 | 2019-11-11 | 友達光電股份有限公司 | Display device |
CN110890050B (en) * | 2019-11-21 | 2022-07-12 | 武汉华星光电半导体显示技术有限公司 | Array substrate, manufacturing method thereof and display device |
CN112068372A (en) | 2020-09-10 | 2020-12-11 | 深圳市华星光电半导体显示技术有限公司 | Array substrate and display panel |
CN112599537A (en) * | 2020-12-11 | 2021-04-02 | 深圳市华星光电半导体显示技术有限公司 | Display substrate and preparation method thereof |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TW494447B (en) * | 2000-02-01 | 2002-07-11 | Semiconductor Energy Lab | Semiconductor device and manufacturing method thereof |
US7977170B2 (en) * | 2006-10-03 | 2011-07-12 | Eastman Kodak Company | Flexible substrate with electronic devices and traces |
KR101393632B1 (en) * | 2007-05-02 | 2014-05-12 | 삼성디스플레이 주식회사 | Thin film transistor and display device using the thin film transistor, and method for manufacturing the display device |
CN102573298B (en) * | 2010-12-07 | 2014-04-30 | 何忠亮 | Production technology for two-sided circuit board |
CN103907050A (en) * | 2012-10-16 | 2014-07-02 | 深圳市柔宇科技有限公司 | Double-sided display screen and manufacturing method therefor |
KR101970569B1 (en) * | 2012-12-17 | 2019-04-19 | 엘지디스플레이 주식회사 | Organic light emitting diode display device |
CN103293812B (en) * | 2013-06-03 | 2016-04-06 | 合肥京东方光电科技有限公司 | A kind of array base palte and restorative procedure thereof and display device |
CN105845701A (en) * | 2015-01-16 | 2016-08-10 | 昆山工研院新型平板显示技术中心有限公司 | Flexible display device and making method thereof |
US9568800B1 (en) * | 2015-02-03 | 2017-02-14 | Amazon Technologies, Inc. | Thin border displays |
DE112016001606T5 (en) * | 2015-04-06 | 2017-12-21 | Mitsubishi Electric Corporation | Semiconductor element and method for its production |
KR20180057573A (en) * | 2015-04-13 | 2018-05-30 | 로욜 코포레이션 | Support and separation of flexible substrate |
US9947895B2 (en) * | 2015-06-17 | 2018-04-17 | Universal Display Corporation | Flexible AMOLED display |
CN104865742A (en) * | 2015-06-23 | 2015-08-26 | 京东方科技集团股份有限公司 | Display panel and control method thereof as well as manufacturing method and display device |
CN105552085B (en) * | 2015-12-25 | 2019-04-30 | 昆山国显光电有限公司 | A kind of pixel-driving circuit and preparation method thereof |
TWI561891B (en) * | 2016-01-04 | 2016-12-11 | Au Optronics Corp | Pixel array substrate |
KR102405120B1 (en) * | 2016-09-29 | 2022-06-08 | 삼성디스플레이 주식회사 | Display apparatus and method for manufacturing the same |
CN106773384A (en) * | 2016-12-20 | 2017-05-31 | 深圳市华星光电技术有限公司 | Goa circuit structure |
CN106530972B (en) * | 2016-12-20 | 2017-12-29 | 深圳市华星光电技术有限公司 | The preparation method of flexible array substrate |
CN106681067B (en) * | 2016-12-20 | 2019-01-22 | 深圳市华星光电技术有限公司 | Display device |
US10263202B2 (en) * | 2017-08-04 | 2019-04-16 | Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. | Flexible base plate of OLED display panel and method for manufacturing the same |
-
2016
- 2016-12-20 CN CN201611184559.XA patent/CN106773384A/en active Pending
- 2016-12-27 WO PCT/CN2016/112257 patent/WO2018112997A1/en active Application Filing
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11051405B2 (en) | 2019-05-07 | 2021-06-29 | Au Optronics Corporation | Flexible display |
CN111785226A (en) * | 2020-07-08 | 2020-10-16 | Tcl华星光电技术有限公司 | Signal transmission line structure and display panel |
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US10429681B1 (en) | 2019-10-01 |
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