WO2019167966A1 - 表示装置、ガラス基板およびガラス基板の製造方法 - Google Patents
表示装置、ガラス基板およびガラス基板の製造方法 Download PDFInfo
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- WO2019167966A1 WO2019167966A1 PCT/JP2019/007380 JP2019007380W WO2019167966A1 WO 2019167966 A1 WO2019167966 A1 WO 2019167966A1 JP 2019007380 W JP2019007380 W JP 2019007380W WO 2019167966 A1 WO2019167966 A1 WO 2019167966A1
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- glass substrate
- insulating layer
- connection body
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- main surface
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Classifications
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- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
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- H01L25/16—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof the devices being of types provided for in two or more different main groups of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. forming hybrid circuits
- H01L25/167—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof the devices being of types provided for in two or more different main groups of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. forming hybrid circuits comprising optoelectronic devices, e.g. LED, photodiodes
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- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—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
- G09G3/34—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
- 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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- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
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- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
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- G09F9/40—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character is selected from a number of characters arranged one beside the other, e.g. on a common carrier plate
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- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—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
- G09G3/22—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 using controlled light sources
- G09G3/30—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 using controlled light sources using electroluminescent panels
- G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
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- H01L25/03—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes
- H01L25/04—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers
- H01L25/075—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L33/00
- H01L25/0753—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L33/00 the devices being arranged next to each other
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/121—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/131—Interconnections, e.g. wiring lines or terminals
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/62—Arrangements for conducting electric current to or from the semiconductor body, e.g. lead-frames, wire-bonds or solder balls
Definitions
- the present disclosure relates to a display device having a pixel structure such as a light emitting diode (LED) on one glass substrate surface, a glass substrate, and a method for manufacturing the glass substrate.
- a pixel structure such as a light emitting diode (LED) on one glass substrate surface
- a glass substrate a glass substrate
- a method for manufacturing the glass substrate a pixel structure such as a light emitting diode (LED) on one glass substrate surface, a glass substrate, and a method for manufacturing the glass substrate.
- LED light emitting diode
- Patent Document 1 a self-luminous display device having a plurality of light emitting elements such as LEDs and not requiring a backlight device.
- This prior art display device includes a glass substrate, a scanning signal line arranged in a predetermined direction (for example, a row direction) on the glass substrate, and a direction (for example, crossing the scanning signal line and intersecting a predetermined direction)
- a light emission control signal line arranged in the column direction
- an effective area composed of a plurality of pixel portions divided by the scanning signal line and the light emission control signal line, and a plurality of light emitting elements arranged on the insulating layer, It is the structure which has these.
- the scanning signal line and the light emission control signal line are connected to the back surface wiring on the back surface of the glass substrate through the side surface wiring arranged on the side surface of the glass substrate.
- the back surface wiring is connected to a driving element such as an IC or LSI installed on the back surface of the glass substrate.
- the display of the display device is driven and controlled by the driving element on the back surface of the glass substrate.
- the driving element is mounted on the back side of the glass substrate by means such as a COG (Chip On Glass) method.
- a display device of the present disclosure includes a glass substrate having a main surface and side surfaces, a pixel structure disposed on one main surface of the glass substrate, and a drive signal disposed on the one main surface, the drive signal being transmitted to the pixel structure
- the display device includes an input electrode for inputting a light source, and a back connection body that is disposed on the other main surface of the glass substrate and is electrically connected to the input electrode.
- the insulating layer is arranged, and the upper surface of the first insulating layer is arranged at a position higher than the upper surface of the back connection body.
- the glass substrate of the present disclosure includes a plurality of pixel structures disposed on one main surface, an input electrode disposed on the one main surface and inputting a drive signal to the pixel structure, and the other main surface And a back surface connection body electrically connected to the input electrode, wherein the second main surface is located in an effective region having the plurality of pixel structures, and 1 insulating layer is disposed, and the upper surface of the first insulating layer is disposed higher than the upper surface of the back-side connector.
- an input electrode for inputting a drive signal to the pixel structure is formed on one main surface side, and the other main surface side is electrically connected to the input electrode.
- a method of manufacturing a glass substrate for forming a back surface connection body wherein a first insulating layer is formed after forming a back surface electrode constituting the back surface connection body on the other main surface side, and then the input A side wiring for electrically connecting the electrode and the back electrode is formed, a back connection is formed simultaneously with the formation of the side wiring, and the height of the top surface of the first insulating layer is set to the top of the back connection It is the structure made higher than the height of.
- the display device includes a glass substrate having a main surface and side surfaces, a pixel structure disposed on one main surface side of the glass substrate, and a pixel structure disposed on the one main surface side.
- a first insulating layer is disposed on a surface side, and an upper surface of the first insulating layer is disposed at a position higher than an upper surface of the back surface connector, and is on the one main surface side, and the pixel configuration
- a pixel structure arrangement material is provided between the body and the glass substrate, a surface connection body including the input electrode is provided, and an upper surface of the pixel structure arrangement material is higher than an upper surface of the surface connection body It is the composition which is arranged.
- FIG. 7 is a cross-sectional view taken along line A1-A2 of the display device of FIG. FIG.
- FIG. 7 is a circuit diagram of one light emitting element and a light emission control unit connected thereto in the display device of FIG. 6. It is a figure which shows the other example of the display apparatus of the structure based on the display apparatus of this indication, and is a block circuit diagram of the basic composition of a display apparatus.
- FIG. 10 is a circuit diagram of one light emitting element and a light emission control unit connected thereto in the display device of FIG. 9.
- FIG. 11 is a cross-sectional view taken along line B1-B2 of the display device of FIG.
- a display device having a configuration based on the display device of the present disclosure includes a glass substrate 1, a scanning signal line 2 arranged in a predetermined direction (for example, a row direction) on the glass substrate 1, and a crossing with the scanning signal line 2. And a plurality of pixel portions (Pmn) divided by the light emission control signal lines 3 arranged in a direction crossing a predetermined direction (for example, the column direction) and the scanning signal lines 2 and the light emission control signal lines 3. And a plurality of light emitting elements 14 arranged on the insulating layer.
- the scanning signal line 2 and the light emission control signal line 3 are connected to the back surface wiring 9 on the back surface of the glass substrate 1 through the side surface wiring 30 arranged on the side surface of the glass substrate 1.
- the back surface wiring 9 is connected to a driving element 6 such as an IC or LSI installed on the back surface of the glass substrate 1. That is, the display of the display device is driven and controlled by the driving element 6 on the back surface of the glass substrate 1.
- the drive element 6 is mounted on the back surface side of the glass substrate 1 by means such as a COG (Chip On Glass) method, for example.
- a light emission control unit 22 for controlling light emission, non-light emission, light emission intensity, and the like of the light emitting element 14 (LDmn) in the light emitting region (Lmn) is disposed.
- the light emission control unit 22 includes a thin film transistor (TFT) 12 (shown in FIG. 8) as a switch element for inputting a light emission signal to each of the light emitting elements 14, and a light emission control signal (light emission control signal line 3).
- TFT thin film transistor
- a light emission signal In response to a light emission signal output as a potential difference between a positive voltage (anode voltage: about 3 to 5 V) and a negative voltage (cathode voltage: about ⁇ 3 V to 0 V) according to the level (voltage) of And a TFT 13 (shown in FIG. 8) as a drive element for current-driving the light-emitting element 14.
- a capacitive element is arranged on a connection line connecting the gate electrode and the source electrode of the TFT 13, and the capacitive element converts the voltage of the light emission control signal input to the gate electrode of the TFT 13 into a period until the next rewriting (1 It functions as a holding capacity to hold).
- the light emitting element 14 is connected to the light emission control unit 22, the positive voltage input line 16, the negative voltage via the through conductors 23 a and 23 b such as through holes that penetrate the insulating layer 41 (shown in FIG. 7) disposed in the effective region 11.
- the voltage input line 17 is electrically connected. That is, the positive electrode of the light emitting element 14 is connected to the positive voltage input line 16 through the through conductor 23a and the light emission control unit 22, and the negative electrode of the light emitting element 14 is connected to the negative voltage input line through the through conductor 23b. 17 is connected.
- the display device has a frame portion 1g that does not contribute to display between the effective region 11 and the edge of the glass substrate 1 in a plan view, and the light emission control signal line drive circuit, the scanning signal line drive circuit, etc. May be placed. It is desired to make the width of the frame portion 1g as small as possible. Furthermore, when cutting a single mother substrate to cut out a plurality of glass substrates 1, in order to suppress the influence of the cutting line on the light emission control unit 22, as shown in the block circuit diagram of FIG. In the pixel portion 15 at the outermost peripheral portion, the light emission control unit 22 may be arranged inside the glass substrate 1 in a plan view than the light emitting element 14.
- the pixel unit 15 may include a red light emitting sub-pixel unit, a green light emitting sub-pixel unit, and a blue light emitting sub-pixel unit.
- the sub-pixel unit for red light emission has a red light-emitting element composed of a red LED or the like
- the sub-pixel unit for green light emission has a green light-emitting element composed of a green LED or the like
- the sub-pixel unit for blue light emission is And a blue light emitting element composed of a blue LED or the like.
- these sub-pixel portions are arranged in the row direction or the column direction.
- FIG. 10 is a partially enlarged plan view showing an enlarged pixel portion 15 (P11) at the outermost periphery in the display device of FIG. 9, and FIG. 11 is a cross-sectional view taken along line B1-B2 of FIG.
- a light shielding portion 25 made of a black matrix or the like is arranged in the frame portion 1g. .
- an insulating planarizing layer 51 made of an acrylic resin or the like is disposed on the glass substrate 1, and the light emitting element 14 is mounted on the insulating planarizing layer 51.
- the light emitting element 14 is located at a position about 50 to 200 ⁇ m away from the end of the glass substrate 1. That is, the separation width L1 from the end 1t of the glass substrate 1 of the light emitting element 14 in FIG. 10 is about 80 ⁇ m, and the separation width L2 is about 150 ⁇ m.
- the light emitting element 14 is electrically connected to the positive electrode 54 a and the negative electrode 54 b disposed on the insulating planarizing layer 51 via a conductive connecting member such as solder and mounted on the insulating planarizing layer 51. Is done.
- the positive electrode 54a includes an electrode layer 52a made of Mo layer / Al layer / Mo layer (showing a laminated structure in which an Al layer and a Mo layer are sequentially laminated on the Mo layer), and the like, and indium tin oxide (Indium Tin covering it) Oxide: ITO) or the like, and a transparent electrode 53a.
- the negative electrode 54b may have the same configuration, and includes an electrode layer 52b made of Mo layer / Al layer / Mo layer or the like and a transparent electrode 53b made of ITO or the like covering the electrode layer 52b.
- An input electrode 2p is disposed at a position closer to the side surface 1s of the glass substrate 1 than the positive electrode 54a and the negative electrode 54b on the insulating planarizing layer 51.
- the input electrode 2p includes the electrode layer 52c and the electrode layer 52c. And a transparent electrode 53c made of ITO or the like.
- the input electrode 2p functions as a relay electrode that is electrically connected to the positive electrode 54a and electrically connected to the back surface wiring 9 through the side surface wiring 30.
- insulating planarization layer 51 Covering the insulating planarization layer 51, a part of each of the transparent electrodes 53a and 53b (a portion where the light emitting element 14 does not overlap), and the peripheral edge of the transparent electrode 53c, silicon oxide (SiO 2 ), silicon nitride
- An insulating layer 55 made of (SiN x ) or the like is disposed.
- a light shielding layer 56 made of a black matrix or the like is disposed in a portion excluding the mounting portion of the light emitting element 14 and the arrangement portion of the light shielding member 25.
- the light shielding layer 56 may be provided for the purpose of causing a portion other than the portion of the light emitting element 14 to have a dark background color such as black when the display device is viewed in plan.
- the side surface wiring for electrically connecting the input electrode 2p and backside interconnect 9 30 is arranged.
- the side wiring 30 may be formed by applying and baking a conductive paste containing conductive particles such as silver.
- the light shielding member 25 is disposed so as to cover the input electrode 2p and the side wiring 30.
- the positive electrode of the light emitting element 14 is connected to the positive electrode 54a via a conductive connection member such as solder, and the negative electrode of the light emitting element 14 is connected to the negative electrode 54b via a conductive connection member such as solder.
- the light emitting element 14 is mounted on the glass substrate 1.
- the display device according to the present disclosure may include components such as a circuit board, a wiring conductor, a control IC, and an LSI that are not shown in the drawing. 1 to 5 showing the embodiment of the display device according to the present disclosure, the same portions as those in FIGS. 6 to 11 are denoted by the same reference numerals, and detailed description thereof is omitted.
- the display device of the present disclosure is disposed on the glass substrate 1, the light emitting element 14 mounted on the surface 1h side which is one main surface of the glass substrate 1, and the glass substrate 1.
- a positive electrode and a negative electrode (not shown) for electrically connecting the light emitting element 14, an input electrode 2 p disposed at the end of the glass substrate 1 and electrically connected to the positive electrode and the negative electrode, and the light emitting element 14
- an insulating planarization layer 51 that is a pixel component arrangement material formed between the glass substrate 1 and the surface 1 h of the glass substrate 1, a side wiring 30 formed on the side surface 1 s of the glass substrate 1, and the other side of the glass substrate 1.
- the configuration includes a driving element 6 such as an LSI.
- the back surface insulating layer 52 as a 1st insulating layer is arrange
- the back connection body 31 includes a back electrode 35 and a back cover wiring 32, and the second insulating layer is an insulating overcoat layer 36.
- the upper surface of a certain member is the surface that is farthest from the main surface of the glass substrate 1 on which the member is disposed. Therefore, the height of the upper surface of a certain member corresponds to the distance between the main surface of the glass substrate 1 on which the member is disposed and the surface of the member that is farthest from the main surface.
- the signal output from the driving element 6 such as an IC disposed on the back surface 1r which is the other main surface of the glass substrate 1 is transmitted to the surface of the glass substrate 1 by the side wiring 30 formed on the side surface 1s of the glass substrate 1.
- the light can be supplied to the light emitting element 14 on the 1h side. Since the back surface 1r side of the glass substrate 1 can be used effectively, the frame portion 1g can be reduced. Since the frame portion 1g can be reduced, the joint between the display devices becomes inconspicuous in tiling where a plurality of display devices are arranged. As a result, it is possible to perform a display with a good aesthetic feeling without a sense of incongruity.
- the side wiring 30, the front cover wiring 33 and the back cover wiring 32 are preferably covered with an insulating overcoat layer 36. In this case, the wiring, the input electrode 2p, and the back electrode 35 are effectively connected. Can be covered and protected.
- the light-emitting element 14 may be any self-light-emitting element such as a microchip light-emitting diode (LED), a monolithic light-emitting diode, an organic EL, an inorganic EL, or a semiconductor laser element. obtain.
- LED microchip light-emitting diode
- monolithic light-emitting diode organic EL
- inorganic EL organic EL
- semiconductor laser element a semiconductor laser element
- the overcoat layer 36 is disposed for the purpose of preventing the frame portion 1g from being noticeable and for protecting the side wiring 30 disposed on the side surface of the glass substrate 1. Therefore, it is preferable that the overcoat layer 36 is disposed so as to extend to the frame portion 1 g of the glass substrate 1.
- position so that the insulating planarization layer 51 arrange
- position so that the back surface insulating layer 52 arrange
- the overcoat layer 36 preferably has a light shielding property.
- the overcoat layer 36 is a dark color such as black, black-brown, dark brown, dark blue, or dark purple, and has a color that efficiently absorbs and blocks visible light.
- the overcoat layer 36 has a dark color in a transparent resin layer. It is composed of a light-shielding film formed by mixing pigments, dyes, or the like, a seal-like material installed by adhesion, adhesion, or the like, or a frame-like body made of plastic or the like installed by adhesion, adhesion, or the like.
- the overcoat layer 36 is an uncured resin paste mixed with dark pigments, dyes and the like applied to the frame portion 1g on the glass substrate 1 by a coating method, a printing method using a mask, a roller printing method, or the like. It may be formed by printing, arranging and curing by a thermosetting method, a photocuring method by irradiation with ultraviolet rays, a photothermal curing method, or the like.
- the width of the overcoat layer 36 is substantially the same as the width of the frame portion 1g.
- the width of the frame portion 1g having a smaller width for example, the width of the frame portion 1g on the upper side of the glass substrate 1 in FIG. 10 is about 20 ⁇ m to 50 ⁇ m.
- the width of the overcoat layer 36 to be disposed is about 20 ⁇ m to 50 ⁇ m. Since the width of the frame portion 1g having the larger width, for example, the frame portion 1g on the left side portion of the glass substrate 1 in FIG. 10 is about 100 ⁇ m to 200 ⁇ m, it is arranged in the frame portion 1g having the larger width.
- the width of the overcoat layer 36 is about 100 ⁇ m to 200 ⁇ m.
- a plurality of layered members are laminated on the glass substrate 1, and the height positions thereof are important.
- the height of the upper surface of insulating planarization layer 51 is hs1
- the height of the upper surface of overcoat layer 36 on the surface 1h side is hs3
- the input electrode When the height of the upper surface of the surface connection body 37 having 2p and the surface cover wiring 33 is hs2, the height hs3 of the upper surface on the surface 1h side of the overcoat layer 36 is higher than the height hs1 of the upper surface of the insulating planarizing layer 51.
- the height hs2 of the upper surface of the surface connection body 37 is lower than the height hs1 of the upper surface of the insulating planarizing layer 51, and further lower than the height hs3 of the upper surface of the overcoat layer 36 on the surface 1h side. .
- the height of the upper surface is defined as the maximum height from the viewpoint of preventing damage and preventing damage.
- the back surface insulating layer 52 is disposed on the back surface 1r side of the glass substrate 1.
- the arrangement position of the back surface insulating layer 52 preferably corresponds to the arrangement area of the light emitting element 14. That is, it is preferable to be arranged corresponding to the effective area 11.
- the outer shape and area in plan view of the insulating planarizing layer 51 disposed on the front surface 1h side of the glass substrate 1 and the back surface insulating layer 52 disposed on the back surface 1r side of the glass substrate 1 are substantially the same. Therefore, the force applied from these layers to both main surfaces of the glass substrate 1 can be made substantially the same. As a result, the glass substrate 1 can be prevented from warping due to the difference between the thermal expansion coefficient of these layers and the thermal expansion coefficient of the glass substrate 1.
- the thickness of the insulating planarizing layer 51 and the thickness of the back insulating layer 52 are preferably the same.
- the material of the insulating planarizing layer 51 and the material of the back surface insulating layer 52 are preferably the same.
- both the material of the insulating planarizing layer 51 and the material of the back surface insulating layer 52 may be organic resins such as acrylic resin and polycarbonate, and silicon oxide (SiO 2 ) and silicon nitride (Si 3 N 4 ).
- the back insulating layer 52 is not formed at a position where the driving element 6 for supplying a driving signal to the light emitting element 14 on the front surface 1h side of the glass substrate 1 is disposed.
- the back surface insulating layer 52 is made of a photosensitive resin or the like, and may be formed by removing the resin at the position where the driving element 6 is disposed when formed by photolithography. Similarly, the portion corresponding to the frame portion 1g may be removed and formed.
- a back electrode 35 electrically connected to the input electrode 2p on the front surface 1h is formed at a portion corresponding to the frame portion 1g on the back surface 1r of the glass substrate 1.
- the side wiring 30 is formed on the side surface 1s of the glass substrate 1 with a material such as silver paste. Simultaneously with the step of coating the side surface wiring 30, a step of coating the back surface cover wiring 32 on the back surface 1r side of the glass substrate 1 and the surface cover wiring 33 on the front surface 1h side of the glass substrate 1 is performed.
- the input electrodes 2p are connected to the respective upper surfaces.
- the back surface connection body 31 having the back surface electrode 35 and the back surface cover wiring 32 is formed by being electrically connected to the side surface wiring 30, and the front surface connection body 37 having the input electrode 2p and the front surface cover wiring 32 is formed on the side surface. It is formed by being electrically connected to the wiring 30.
- the overcoat layer 36 is disposed so as to cover the back connection body 31, the side wiring 30, and the front connection body 37.
- the height position of the laminate on the back surface 1r side is important.
- the height of the upper surface of the back surface connection body 31 is hr2
- the height of the upper surface of the overcoat layer 36 on the back surface 1r side is hr3, and the back surface insulating layer 52
- the height hr3 of the upper surface is set lower than the height hr1 of the upper surface of the back surface insulating layer 52.
- FIG. 3 is a schematic back plan view of the glass substrate 1 viewed from the back 1r side.
- a region indicated by a broken line is a region corresponding to the effective region 11, and is a region in which a plurality of light emitting elements 14 are arranged in alignment on the surface 1 h side.
- a back insulating layer 52 is disposed so as to cover the effective area 11 in a plan view.
- the side wiring 30 is formed on two sides of a rectangular glass substrate, and a driving element 6 such as an IC is disposed at the center of the back surface 1 r of the glass substrate 1. Further, a back surface wiring 9 connecting the side surface wiring 30 and the driving element 6 is formed on the back surface 1r side.
- the back surface insulating layer 52 is disposed so as to cover the back surface wiring 9.
- the back insulating layer 52 is disposed on the entire effective area 11 except for the mounting position of the driving element 6. That is, since the back surface insulating layer 52 having a large top surface and a large area is present, the top surface of the back surface insulating layer 52 is stably in contact with the mounting table and the like, and therefore exists on the side surface 1s side of the glass substrate 1. The placement table or the like is prevented from hitting the back surface connection body 31 having a low top surface as much as possible.
- a manufacturing process may be conveyed by making each main surface into an upper side. By forming each layer, electrode, and the like in the height relationship as in the present embodiment, even if the main surface of the glass substrate 1 is transported and flowed upward, it is difficult to cause transport scratches. be able to.
- FIG. 4 shows another embodiment, which is a glass substrate 1 having a through wiring 39 instead of the side wiring 30 and a display device.
- the through wiring 39 is formed by forming a through hole extending from the front surface 1h to the back surface 1r of the glass substrate 1 and then filling a conductor such as metal along the inner wall of the through hole.
- the through wiring 39 is formed in the frame portion 1 g of the glass substrate 1, and the back electrode 35 and the input electrode 2 p are formed around the through hole portion of the glass substrate 1.
- the through wiring 39 is formed by a metal sputtering method, a molten solder method, or the like, the back cover wiring 32 is formed on the back surface 1r side, and the front surface cover wiring 33 is formed on the front surface 1h side.
- an overcoat layer 36 is provided so as to cover the back surface connection body 31 and the front surface connection body 37.
- the height relationship of the laminated body laminated on the main surface of the glass substrate 1 is important.
- the height of the upper surface of the back surface connection body 31 is lower than the height of the upper surface of the back surface insulation layer 52, and the height of the upper surface of the overcoat layer 36 on the back surface 1r side that covers the back surface connection body 31 is the back surface insulation layer.
- the position is lower than the height of the upper surface of 52.
- the height of the upper surface of the surface connection body 37 is set lower than the height of the upper surface of the insulating planarizing layer 51, and the height of the upper surface of the overcoat layer 36 on the surface 1 h side covering the surface connection body 37. Is set lower than the height of the upper surface of the insulating planarizing layer 51.
- the flowchart shown in FIG. 5 shows an embodiment of the method for manufacturing the glass substrate 1, and shows the manufacturing steps.
- switching elements 12 and 13 made of TFT or the like for supplying a driving signal to the light emitting element 14 are formed on the surface 1 h side of the glass substrate 1.
- a thin film forming technique such as a CVD (Chemical Vapor Deposition) method may be employed.
- an insulating planarization layer 51 which is a pixel component arrangement material on the surface 1h side of the glass substrate 1 is formed.
- the insulating flattening layer 51 is made of a photosensitive resin or the like, and the layer thickness can be 2 ⁇ m to 5 ⁇ m. Further, the insulating planarizing layer 51 is partially removed as necessary.
- a positive electrode, a negative electrode, and the like for disposing the light emitting element 14 are formed to form a surface side pixel structure.
- the pixel structure includes a light emitting element 14, a positive electrode and a negative electrode connected to the light emitting element 14, and switching elements 12, 13 and the like that are electrically connected to the electrodes. It includes one or more pixel portions.
- the LED light emitting display device is used as the display device, but a liquid crystal display device may be used.
- a pixel electrode included in a part of a pixel is a front side pixel structure. Then, an array substrate on which a plurality of pixel electrodes are formed and a counter substrate on which color filters and the like are formed can be overlapped to form a liquid crystal display device.
- step 4 the input electrode 2 p is formed on the frame portion 1 g of the glass substrate 1.
- the formation of the input electrode 2p may be performed simultaneously with the formation of the positive electrode and the negative electrode for disposing the light emitting element 14, or may be performed in another step. Further, a thin film forming method such as a CVD method can be adopted as a method for forming the input electrode 2p.
- step 5 wiring and electrodes on the back surface 1r side of the glass substrate 1 are formed. When forming the wiring and electrodes on the back surface 1r side, the front surface 1h side of the glass substrate 1 is placed on the placement surface of the placement table.
- the thickness (height hs1 of the upper surface) of the insulating planarizing layer 51 is thicker than the thickness (height hs2) of the surface connection body 37, the surface 1h of the glass substrate 1 is placed on the mounting surface of the mounting table.
- the input electrode 2p formed on the frame portion 1g will not be damaged even if it is brought into contact with the frame 1g.
- the back surface wiring 9 and the back surface electrode 35 on the back surface 1r side of the glass substrate 1 are formed.
- the back surface wiring 9 and the back surface electrode 35 are formed of a transparent conductive film such as ITO (Indium Tin Oxide), and are formed into a predetermined shape by a photolithography method.
- the back insulating layer 52 is formed of a photosensitive resin. In the back insulating layer 52, the drive element mounting region and the frame portion 1g are removed by photolithography.
- the thickness of the back insulating layer 52 (upper surface height hr1) is preferably 2 ⁇ m to 7 ⁇ m.
- the back insulating layer 52 may have a laminated structure in which a plurality of resin insulating layers are laminated.
- the contact surface that contacts the mounting surface of the mounting table in the glass substrate 1 is defined as the back surface insulating layer 52 on the back surface 1r side.
- the thickness of the back surface insulating layer 52 is formed thicker than the thickness of the back surface electrode 31 formed in the frame portion 1g, the possibility of damaging the back surface electrode 31 is low.
- the side wiring 30 is formed on the side surface 1 s of the glass substrate 1.
- the method for forming the side wiring 30 may be a relief printing method, an offset printing method, or the like, or a dispenser coating method.
- the front cover wiring 33 and the rear cover wiring 32 are formed of the same material so as to run up to the input electrode 2p on the front surface 1h side and the rear surface electrode 35 on the rear surface 1r side of the glass substrate 1. .
- a front surface connection body 37 is formed by the input electrode 2 p and the front surface cover wiring 33, and a back surface connection body 31 is formed by the back surface electrode 35 and the back surface cover wiring 32.
- the thickness of the surface connection body 37 is made thinner than the thickness of the insulating planarization layer 51 on the front surface 1h side, and the thickness of the back surface connection body 31 is made thinner than the thickness of the back surface insulation layer 52 on the back surface 1r side. is important.
- an overcoat layer 36 is applied so as to cover the side wiring 30.
- the overcoat layer 36 may be formed by a printing method, a dipping method, or the like, but is preferably formed by an inkjet method, a dispensing method, or the like in order to strictly control the coating amount and the coating thickness.
- the overcoat layer 36 is formed so as to cover not only the side wiring 30 but also the back surface connection body 31 and the front surface connection body 37. At this time, since the mounting surface of the mounting table is in contact with the thick rear surface insulating layer 52, the overcoat layer 36 on the rear surface 1r side does not hit the mounting table, and smooth coating is possible. Become.
- the thicknesses of the overcoat layer 36 on the front surface 1h side and the back surface 1r side are also important.
- the thickness of the overcoat layer 36 on the front surface 1h side is set to be thinner than the thickness of the insulating planarizing layer 51, and the thickness of the overcoat layer 36 on the back surface 1r side is set to be thinner than the thickness of the back surface insulating layer 52.
- the overcoat layer 36 is preferably formed from a light-shielding insulating material.
- the overcoat layer 36 having a light-shielding property can have a color such as black or dark blue.
- part extended to the surface 1h and the back surface 1r of the glass substrate 1 in the overcoat layer 36 is formed so that the whole frame part 1g may be covered.
- step 9 a plurality of light emitting elements 14 are aligned on the insulating planarization layer 51 on the surface 1h side of the glass substrate 1, and each light emitting element 14 is connected to the positive electrode and the negative electrode.
- a predetermined pressing force is applied to the plurality of light emitting elements 14 from the front surface 1h side of the glass substrate 1 by a pressing plate or the like, but the back surface insulating layer 52 on the back surface 1r side is formed on almost the entire effective area 11.
- the pressing force is uniformly dispersed. Accordingly, the pressing force is not locally applied to the glass substrate 1.
- the thickness of the back surface insulating layer 52 is formed to be thicker than the thickness of other constituent members, no pressing force is applied to the other constituent members.
- the driving element 6 is mounted on the rear surface 1r side of the glass substrate 1, and the glass substrate 1 on which the light emitting element 14 is mounted is manufactured.
- the height of the upper surface of the drive element 6 may be equal to or less than the height of the upper surface of the back surface insulating layer 52.
- the drive element 6 may come into contact with other members such as a casing or a frame or other equipment during transportation of the manufactured glass substrate 1 or display device, causing damage, failure, etc. It becomes easy to suppress failure due to static electricity.
- a protective resin layer, a protective film, or the like that covers the drive element 6 may be disposed.
- the protective resin layer and the protective film may have insulating properties, and in that case, the drive element 6 can be prevented from being affected by static electricity.
- the protective resin layer and the protective film may have a structure in which a conductive resin layer is laminated on an insulating resin layer or a structure in which a conductive film is laminated on an insulating film. It has shielding properties.
- the protective resin layer and the protective film may have translucency, and in that case, the state of the driving element 6 can be visually recognized from the outside.
- the back insulating layer 52 may be a film type. In the case of a film type, it is easy to set the thickness to be larger than the thickness of the back insulating layer 52 made of a resin layer formed by a coating method or the like. As a result, the back surface connection body 31 disposed at the end of the back surface 1r of the glass substrate 1 can be more effectively protected.
- the back insulating layer 52 may have a function of a polarizing film or a retardation film.
- the film as the back insulating layer 52 does not have to be transparent, and may be a colored film.
- the upper surface of the insulating planarizing layer 51 and the back surface insulating layer 52 that are likely to come into contact with external equipment such as a mounting table may be smooth. In that case, even if the upper surface of the insulating planarizing layer 51 and the upper surface of the back surface insulating layer 52 are in contact with an external device, they are hardly damaged.
- the smooth surface is preferably a surface having an arithmetic average roughness of about 50 ⁇ m or less, more preferably a surface having an arithmetic average roughness of about 10 ⁇ m or less.
- the insulating planarization layer 51 and the back surface insulating layer 52 that easily come into contact with an external device such as a mounting table contain a large number of insulating hard particles made of alumina ceramic or the like in order to improve their hardness. There may be.
- the insulating hard fine particles may be of a dark color such as black or black-brown. In that case, the background color of the effective area 11 which is the display unit of the display device can be dark color to improve the display quality.
- the frame portion 1g and its periphery can be made inconspicuous.
- the glass substrate 1 may be a transparent glass substrate, but may be opaque.
- the glass substrate 1 may be a colored glass substrate, a glass substrate made of ground glass, a composite substrate of a glass substrate and a ceramic substrate, or a composite substrate of a glass substrate and a metal substrate. Good.
- the following embodiments are possible for the present invention.
- the back connection body may be covered with a second insulating layer, and the upper surface of the second insulating layer may be positioned lower than the upper surface of the first insulating layer.
- the first insulating layer may be arranged corresponding to the arrangement position of the pixel structure.
- a driving element that supplies a driving signal to the other main surface is disposed, and an upper surface of a back surface wiring that connects the driving element and the back surface connection body is an upper surface of the first insulating layer. It may be arranged at a lower position.
- a wiring that connects the input electrode and the back surface connection body may be a side wiring arranged on a side surface of the glass substrate.
- the back surface connection body may be made of a material for the back surface electrode and the side surface wiring formed on the glass substrate.
- the back connection body may be covered with a second insulating layer, and the upper surface of the first insulating layer may be disposed higher than the upper surface of the second insulating layer.
- a driving element that drives the pixel structure is arranged on the other main surface, and the arrangement position of the driving element may be other than the arrangement position of the first insulating layer.
- the glass substrate of the present disclosure may be a side surface wiring in which a wiring connecting the input electrode and the back surface connection body is disposed on a side surface adjacent to two main surfaces.
- a second insulating layer covering the back surface connection body is formed, and the height of the upper surface of the second insulating layer is set to the first surface.
- the structure may be lower than the height of the upper surface of the insulating layer.
- the first insulating layer on the other main surface side is not formed on the driving element that drives the pixel structure. May be mounted in position.
- the display device of the present disclosure is The back connection body and the front surface connection body are covered with a second insulating layer;
- the upper surface of the second insulating layer on the other surface side is lower than the upper surface of the first insulating layer;
- the upper surface of the second insulating layer on the one surface side may be at a position lower than the upper surface of the pixel component arrangement material.
- a glass substrate having a main surface and side surfaces, a pixel structure (for example, a light emitting element) disposed on one main surface of the glass substrate, and a pixel configuration disposed on one main surface
- a display device comprising: an input electrode for inputting a drive signal to the body; and a back connection body disposed on the other main surface of the glass substrate and electrically connected to the input electrode. Since one insulating layer is disposed and the upper surface of the first insulating layer is disposed at a position higher than the upper surface of the back-side connector, the following effects can be obtained. Since the back surface connection body exists at a position lower than the first insulating layer formed on the back surface, the back surface connection body can be prevented from being damaged and disconnected.
- the back surface connection body is covered with the second insulating layer, and the upper surface of the second insulating layer is positioned lower than the upper surface of the first insulating layer.
- the second insulating layer covering the substrate can also be protected. Therefore, it is possible to protect the back surface connection body more effectively.
- the first insulating layer is arranged corresponding to the arrangement position of the pixel structure, the first insulating layer can be formed with a large area.
- the glass substrate can be protected more stably, and damage and disconnection of the back surface connection body can be prevented more effectively.
- an input electrode for inputting a drive signal to the pixel structure is formed on one main surface side, and is electrically connected to the input electrode on the other main surface side.
- a glass substrate having a main surface and side surfaces, a pixel structure disposed on one main surface side of the glass substrate, and disposed on one main surface side and driven by the pixel structure
- a display device comprising: an input electrode for inputting a signal; and a back surface connection body disposed on the other main surface side of the glass substrate and electrically connected to the input electrode.
- the upper surface of the first insulating layer is disposed at a position higher than the upper surface of the back connection body, on one main surface side, between the pixel structure and the glass substrate.
- the structure arrangement material is provided, the surface connection body is provided on the input electrode, and the upper surface of the pixel structure arrangement material is arranged at a position higher than the upper surface of the surface connection body.
- the height of the upper surface of the back connection body and the height of the upper surface of the front surface connection body are lower than the height of the insulating layer arranged on the main surface side of the glass substrate on which each is formed. As a result, breakage and disconnection of the back surface connection body and the front surface connection body can be prevented.
- the back surface connection body and the surface connection body are covered with the second insulating layer, and the upper surface of the second insulating layer on the other main surface side is lower than the upper surface of the first insulating layer.
- the upper surface of the second insulating layer covering the back surface connection body and the front surface connection body because the upper surface of the second insulating layer on one main surface side is lower than the upper surface of the pixel component arrangement material.
- the position is lower than the upper surface of the first insulating layer and the upper surface of the pixel component arrangement material. As a result, breakage and disconnection of the back surface connection body and the front surface connection body can be more effectively prevented.
- the display device of the present disclosure can be configured as a self-luminous display device such as an LED display device or an organic EL display device, or a transmissive display device such as a liquid crystal display device.
- the display device of the present disclosure can be applied to various electronic devices.
- the electronic devices include complex and large display devices (multi-displays), automobile route guidance systems (car navigation systems), ship route guidance systems, aircraft route guidance systems, smartphone terminals, mobile phones, tablet terminals, personal digital assistants.
- PDA video camera
- digital still camera electronic notebook
- electronic book electronic dictionary
- personal computer copying machine
- terminal device of game machine television, product display tag, price display tag, industrial programmable display device
- ATM automatic teller machine
- HMD head mounted display
- digital display wristwatch smart watch and the like.
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Abstract
Description
本発明は、次の実施の形態が可能である。
前記裏面接続体および前記表面接続体が第2の絶縁層に覆われ、
前記他方の面側における第2絶縁層の上面が前記第1の絶縁層の上面よりも低い位置となり、
前記一方の面側における第2絶縁層の上面が前記画素構成体配置材の上面よりも低い位置であってもよい。
1h ガラス基板の表面(一方の主面)
1r ガラス基板の裏面(他方の主面)
1s ガラス基板の側面
2p 入力電極
6 駆動素子
14 発光素子
30 側面配線
31 裏面接続体
35 裏面電極
36 オーバーコート層
37 表面接続体
51 絶縁性平坦化層
52 裏面絶縁層
Claims (15)
- 主面および側面を有するガラス基板と、
前記ガラス基板の一方の主面に配置された画素構成体と、
前記一方の主面に配置され、前記画素構成体に駆動信号を入力する入力電極と、
前記ガラス基板の他方の主面に配置され、前記入力電極に電気的に接続される裏面接続体と、を有する表示装置であって、
前記他方の主面に第1の絶縁層が配置され、前記第1の絶縁層の上面が前記裏面接続体の上面よりも高い位置に配されている表示装置。 - 前記裏面接続体が第2の絶縁層に覆われ、前記第2の絶縁層の上面が前記第1の絶縁層の上面よりも低い位置にある請求項1に記載の表示装置。
- 前記第1の絶縁層が前記画素構成体の配置位置に対応して配置されている請求項1または2に記載の表示装置。
- 前記他方の主面に駆動信号を供給する駆動素子が配置され、前記駆動素子と前記裏面接続体とを接続する裏面配線の上面が前記第1の絶縁層の上面よりも低い位置に配置されている請求項1~3のいずれか1項に記載の表示装置。
- 前記入力電極と前記裏面接続体とを接続する配線が、前記ガラス基板の側面に配された側面配線である請求項1~4のいずれか1項に記載の表示装置。
- 前記裏面接続体が、前記ガラス基板に形成された裏面電極および前記側面配線の材料から構成されている請求項5に記載の表示装置。
- 一方の主面に配置された複数の画素構成体と、
前記一方の主面に配置され、前記画素構成体に駆動信号を入力する入力電極と、
他方の主面に配置され、前記入力電極に電気的に接続された裏面接続体と、を有するガラス基板であって、
前記他方の主面において、前記複数の画素構成体を有する有効領域に位置して、第1の絶縁層が配置され、
前記第1の絶縁層の上面が、前記裏面接続体の上面よりも高く配置されているガラス基板。 - 前記裏面接続体が第2の絶縁層に覆われており、前記第1の絶縁層の上面が前記第2の絶縁層の上面よりも高く配置されている請求項7に記載のガラス基板。
- 前記他方の主面に前記画素構成体を駆動する駆動素子が配置されており、前記駆動素子の配置位置は前記第1の絶縁層の配置位置以外である請求項7または8に記載のガラス基板。
- 前記入力電極と前記裏面接続体とを接続する配線が、2つの主面に隣接する側面に配された側面配線である請求項7~9のいずれか1項に記載のガラス基板。
- 一方の主面側に、画素構成体に駆動信号を入力する入力電極を形成し、
他方の主面側に、前記入力電極に電気的に接続される裏面接続体を形成するガラス基板の製造方法であって、
前記他方の主面側に、前記裏面接続体を構成する裏面電極を形成した後に第1の絶縁層を形成し、
その後に、前記入力電極と前記裏面電極とを電気的に接続する側面配線を形成し、
前記側面配線の形成と同時に裏面接続体を形成し、
前記第1の絶縁層の上面の高さを前記裏面接続体の上面の高さよりも高くするガラス基板の製造方法。 - 前記裏面接続体を形成した後に、前記裏面接続体を覆う第2の絶縁層を形成し、前記第2の絶縁層の上面の高さを前記第1の絶縁層の上面の高さよりも低くする請求項11に記載のガラス基板の製造方法。
- 前記第1の絶縁層を形成した後、前記画素構成体を駆動する駆動素子を前記他方の主面側の前記第1の絶縁層が形成されていない位置に搭載する請求項11または12に記載のガラス基板の製造方法。
- 主面および側面を有するガラス基板と、
前記ガラス基板の一方の主面側に配置された画素構成体と、
前記一方の主面側に配置され、前記画素構成体に駆動信号を入力する入力電極と、
前記ガラス基板の他方の主面側に配置され、前記入力電極に電気的に接続される裏面接続体と、を有する表示装置であって、
前記他方の主面側に第1の絶縁層が配置され、前記第1の絶縁層の上面が前記裏面接続体の上面よりも高い位置に配されており、
前記一方の主面側であって、前記画素構成体と前記ガラス基板との間に画素構成体配置材が設けられ、前記入力電極を含む表面接続体が設けられ、
前記画素構成体配置材の上面が前記表面接続体の上面よりも高い位置に配されている表示装置。 - 前記裏面接続体および前記表面接続体が第2の絶縁層に覆われ、
前記他方の主面側における第2絶縁層の上面が前記第1の絶縁層の上面よりも低い位置となり、
前記一方の主面側における第2絶縁層の上面が前記画素構成体配置材の上面よりも低い位置となっている請求項14に記載の表示装置。
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