WO2011021510A1 - 表示装置 - Google Patents
表示装置 Download PDFInfo
- Publication number
- WO2011021510A1 WO2011021510A1 PCT/JP2010/063292 JP2010063292W WO2011021510A1 WO 2011021510 A1 WO2011021510 A1 WO 2011021510A1 JP 2010063292 W JP2010063292 W JP 2010063292W WO 2011021510 A1 WO2011021510 A1 WO 2011021510A1
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- WO
- WIPO (PCT)
- Prior art keywords
- wiring
- display device
- pixel region
- copper
- colored layer
- Prior art date
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- 239000010949 copper Substances 0.000 claims abstract description 99
- 229910052802 copper Inorganic materials 0.000 claims abstract description 97
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 96
- 239000000758 substrate Substances 0.000 claims description 31
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 4
- 239000003990 capacitor Substances 0.000 claims description 2
- 238000003860 storage Methods 0.000 claims description 2
- 229910000881 Cu alloy Inorganic materials 0.000 abstract description 4
- 239000003086 colorant Substances 0.000 abstract description 4
- 239000010410 layer Substances 0.000 description 60
- 239000004973 liquid crystal related substance Substances 0.000 description 48
- 229910052751 metal Inorganic materials 0.000 description 13
- 239000002184 metal Substances 0.000 description 13
- 229910052782 aluminium Inorganic materials 0.000 description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 11
- 238000004040 coloring Methods 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 7
- 239000010408 film Substances 0.000 description 6
- 239000010936 titanium Substances 0.000 description 6
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 5
- 229910052719 titanium Inorganic materials 0.000 description 5
- 238000002834 transmittance Methods 0.000 description 5
- 239000011521 glass Substances 0.000 description 4
- 239000011777 magnesium Substances 0.000 description 3
- 239000011572 manganese Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 3
- 238000002310 reflectometry Methods 0.000 description 3
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- YIWGJFPJRAEKMK-UHFFFAOYSA-N 1-(2H-benzotriazol-5-yl)-3-methyl-8-[2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carbonyl]-1,3,8-triazaspiro[4.5]decane-2,4-dione Chemical compound CN1C(=O)N(c2ccc3n[nH]nc3c2)C2(CCN(CC2)C(=O)c2cnc(NCc3cccc(OC(F)(F)F)c3)nc2)C1=O YIWGJFPJRAEKMK-UHFFFAOYSA-N 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 229910000914 Mn alloy Inorganic materials 0.000 description 1
- VCUFZILGIRCDQQ-KRWDZBQOSA-N N-[[(5S)-2-oxo-3-(2-oxo-3H-1,3-benzoxazol-6-yl)-1,3-oxazolidin-5-yl]methyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C1O[C@H](CN1C1=CC2=C(NC(O2)=O)C=C1)CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F VCUFZILGIRCDQQ-KRWDZBQOSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 229910006404 SnO 2 Inorganic materials 0.000 description 1
- WZMARNWNQFFBKK-UHFFFAOYSA-N [In+3].[O-2].[Zn+2].[In+3].[O-2].[O-2].[O-2] Chemical compound [In+3].[O-2].[Zn+2].[In+3].[O-2].[O-2].[O-2] WZMARNWNQFFBKK-UHFFFAOYSA-N 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- -1 copper nitride Chemical class 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- YVTHLONGBIQYBO-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) Chemical compound [O--].[Zn++].[In+3] YVTHLONGBIQYBO-UHFFFAOYSA-N 0.000 description 1
- XLOMVQKBTHCTTD-UHFFFAOYSA-N zinc oxide Inorganic materials [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/86—Arrangements for improving contrast, e.g. preventing reflection of ambient light
-
- G—PHYSICS
- G02—OPTICS
- 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
- 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
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133512—Light shielding layers, e.g. black matrix
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B33/00—Electroluminescent light sources
- H05B33/12—Light sources with substantially two-dimensional radiating surfaces
-
- 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
-
- G—PHYSICS
- G02—OPTICS
- 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
- 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
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
- G02F1/136286—Wiring, e.g. gate line, drain line
Definitions
- the present invention relates to a display device. More specifically, the present invention relates to a display device that includes a copper wiring in a pixel region and performs color display.
- a liquid crystal display panel having an SHA structure has a high opening by providing an interlayer insulating film formed of a special resin on a wiring formed on a TFT (thin film transistor) array substrate and disposing a pixel electrode on the interlayer insulating film.
- TFT thin film transistor
- a delay in a signal passing through a wiring is likely to occur with an increase in pixel definition. Therefore, it is required to reduce the resistance of the wiring.
- As a wiring material aluminum (Al ), Copper (Cu), titanium (Ti), silver (Ag), or other metal wiring formed of a low-resistance metal. Since these metal wirings have a light-shielding property, in the liquid crystal display panel having the SHA structure, in order to further improve the aperture ratio, the metal wiring is used in the color filter substrate disposed opposite to the TFT array substrate. A light shielding portion is not formed in the light shielding region. And by such a structure, the increase / decrease in the aperture ratio which arises by the shift
- the metal wiring also has a high light reflectance
- a display device using the metal wiring is used in, for example, a bright room
- light incident on the inside of the display device from the outside is reflected on the surface of the metal wiring. May affect the display characteristics. Therefore, in order to reduce the reflected light of such external light, the wiring is covered with a film having a lower reflectance (for example, refer to Patent Document 1), or a light shielding portion is provided in a place where light shielding is required (for example, , See Patent Document 2.)
- a technique has been proposed.
- a configuration in which a light shielding portion is provided on the side of a color filter substrate arranged to face the TFT array substrate is widely applied.
- the method of forming the light shielding portion on the substrate on which the wiring is formed not only complicates the manufacturing process but also hinders high pixel aperture ratio. Furthermore, if a light-shielding portion is provided on the color filter substrate side, the aperture ratio of the pixel may increase or decrease due to the above-described misalignment between the two substrates, and the aperture ratio increases as in the case of a liquid crystal display panel having a SHA structure. It is not suitable for the required display device.
- a wiring using copper (hereinafter also referred to as a copper wiring) among the metal wirings described above.
- copper is a material having a resistivity of about 60% and a low resistance as compared with aluminum, so that the signal delay can be reduced well.
- copper is highly resistant to electromigration in which metal atoms move due to electron collision when a current flows, and therefore, disconnection hardly occurs and a highly reliable display device can be realized.
- a display device in which the surface of the wiring is not covered with a light-shielding portion or the like like like a liquid crystal display panel having a SHA structure has a red color on the display screen due to the influence of reflected light generated by the external light. May be colored. This is due to the following reason. Since the metal wiring formed of aluminum or titanium has a substantially uniform reflectance in the visible light region (wavelength 380 nm to 780 nm), only light of a specific color is generated even if reflected light is generated in the display device. The display screen is less likely to be colored due to reflection.
- the copper wiring has a high reflectivity with respect to light on a long wavelength (600 nm to 780 nm) side, and light having such a wavelength is reddish light. Red coloration tends to occur.
- the present invention has been made in view of the above-described situation. Even in a display device using copper wiring, the present invention is based on the reflected light of external light generated on the inner surface of the display device without hindering the high aperture ratio of the pixel.
- An object of the present invention is to provide a display device that can prevent coloring of the display screen and has excellent display characteristics.
- the inventors of the present invention have made various studies on display devices using copper wiring, and have focused on the fact that the display screen is colored red due to reflection of external light on the surface of the wiring. This phenomenon occurs because copper has a high reflectance with respect to the light on the long wavelength side, and the red colored layer provided in the display device has an effect on the light on the long wavelength side.
- the present invention is a display device having a plurality of pixel regions, and each pixel region has a copper wiring containing copper or an alloy thereof, a red colored layer, and a colored layer of another color.
- the wiring area of the copper wiring that reflects incident light incident from the display surface side of the device is a display device that is smaller in a pixel region having a red colored layer than in a pixel region having a colored layer of another color.
- the copper wiring is a wiring including a layer formed of copper or an alloy thereof on the display surface side.
- the copper alloy include an alloy of copper and magnesium (Mg), an alloy of copper and manganese (Mn), and the content of magnesium and manganese is preferably several to 50% or less.
- a laminated film in which a layer formed of copper oxide (CuO) or copper nitride (CuN) is stacked on a layer formed of Cu can also be applied. It occurs on the surface of a layer formed of CuO or CuN.
- the copper wiring may be formed on the display surface side of a layer made of a metal having a high work function such as gold (Au) or platinum (Pt).
- ITO Indium-Tin-Oxide
- IZO Indium-Zinc-Oxide
- IDIXO Indium-Indium Zinc Oxide; In 2 O 3 (ZnO) n
- SnO 2 The structure which laminated
- the colored layer is for performing color display.
- other colors are not particularly limited as long as a red colored layer is included.
- a display device has at least three colored layers of red, green, and blue, and each colored layer can transmit visible light having a predetermined wavelength to realize color display.
- the red colored layer easily transmits light with a wavelength of about 620 nm to 680 nm
- the green colored layer transmits light with a wavelength of about 520 nm to 580 nm
- the blue colored layer has a wavelength of Lights of about 420 nm to 480 nm are easily transmitted.
- the coloration of the display screen includes not only what is generated during black display when the device is in a lit state but also what is caused by reflection when the device is not lit. By reducing such coloring, it is possible to realize black display that provides a sensuously tightened feeling.
- the state where the device is not lit means, for example, a state where the backlight is not lit and the liquid crystal display panel is not driven in the case of a liquid crystal display device.
- the wiring area refers to an area of a copper wiring that can reflect incident light incident from the display surface side of the display device and emit it to the outside of the display device.
- the wiring area is smaller in a pixel region having a red colored layer (hereinafter also referred to as a red pixel region) than in a pixel region having a colored layer other than red (hereinafter also referred to as a pixel region of another color). It is configured as follows.
- the wiring area in the other color pixel region may be the same or different for each color, but is larger than the wiring area in the red pixel region.
- the amount of reflected light generated in the red pixel region can be reduced, and the amount of reflected light transmitted through the red colored layer can be reduced, so that the red coloring on the display screen can be reduced well. it can.
- the reflected light has a long wavelength and therefore does not easily pass through the colored layer. Therefore, a red color is also generated on the display screen. Hateful.
- the pixel region further includes a light shielding portion that shields the incident light on the display surface side of the copper wiring, and the light shielding portion when the display surface is viewed from the normal direction.
- a display device in which the wiring area of the copper wiring that does not overlap with the pixel area having a red colored layer is smaller than the pixel area having a colored layer of another color can be given.
- providing the light shielding part also hinders an increase in the aperture ratio of the pixel, and therefore it is preferable that the number of light shielding parts is as small as possible.
- the wiring area is such that the wiring area in the pixel region having the red colored layer is 0.6 to 0.8, where the wiring area in the pixel region having the colored layer of the other color is 1. It is more preferable that there is a reduction in color difference deviation.
- the copper wiring has an average width that is narrower in a pixel region having a red colored layer than in a pixel region having a colored layer of another color. Also with this configuration, the wiring area in the red pixel region can be reduced as described above.
- the display device includes an array substrate on which the copper wiring is formed, and a color filter substrate on which the colored layer and the light shielding portion are formed.
- the copper wiring is a pixel driving wiring included in the array substrate. Examples of such copper wiring include those in which the copper wiring is a storage capacitor wiring and those in which the copper wiring is a gate wiring.
- the configuration of the display device of the present invention is not particularly limited by other components as long as such components are essential.
- the display device of the present invention even in a display device using copper wiring, coloring of the display screen due to reflected light of external light generated on the inner surface of the display device is suppressed without hindering the increase in the aperture ratio of the pixel.
- a display device with good display characteristics can be realized.
- FIG. 3 is a schematic plan view illustrating a configuration of a pixel of the liquid crystal display device according to Embodiment 1.
- FIG. FIG. 2 is a schematic cross-sectional view taken along line AB in FIG. 1.
- 2 is a schematic plan view illustrating a configuration of a TFT array substrate according to Embodiment 1.
- FIG. It is a graph which shows the relationship between the wavelength of light in the color filter layer of each color, and the light transmittance. It is a graph which shows the relationship between the wavelength of the light for every metal which comprises wiring, and the reflectance of light.
- FIG. 2 is a schematic plan view illustrating a configuration of a pixel having a light shielding portion different from that in FIG. 1 in the first embodiment.
- FIG. 4 is a graph showing the hues of copper wiring and aluminum wiring according to Example 1; 6 is a graph showing a relationship between a wiring area ratio and a color difference according to Example 1; 6 is a schematic plan view illustrating a configuration of a pixel of a liquid crystal display device according to Comparative Example 1.
- FIG. FIG. 10 is a schematic cross-sectional view taken along the line AB of FIG. 9, showing a configuration of a pixel of a liquid crystal display device according to Comparative Example 1.
- 6 is a schematic plan view illustrating a configuration of a pixel of a liquid crystal display device according to Embodiment 2.
- FIG. 6 is a schematic plan view illustrating a configuration of a pixel of a liquid crystal display device according to Embodiment 3.
- Embodiment 1 In the present embodiment, a liquid crystal display device provided with three color filter (CF) layers of red (R), blue (B), and green (G), in which the area of the copper wiring is adjusted by the light shielding portion Will be described with reference to FIGS.
- CF color filter
- FIG. 1 is a schematic plan view illustrating a configuration of a pixel of the liquid crystal display device according to the first embodiment
- FIG. 2 is a schematic cross-sectional view taken along line AB in FIG.
- FIG. 3 is a schematic plan view showing the configuration of the TFT array substrate
- FIG. 4 is a graph showing the relationship between the light wavelength and the light transmittance in each color filter layer.
- FIG. 5 is a graph showing the relationship between the wavelength of light and the reflectance of light for each metal constituting the wiring.
- FIG. 6 is a schematic plan view illustrating a configuration of a pixel having a light shielding portion different from that in FIG.
- a liquid crystal display device 100 includes a TFT array substrate 110 having copper wiring containing copper or an alloy thereof, and a CF substrate 120 as a counter substrate disposed facing the TFT array substrate 110. And a liquid crystal layer 130 sandwiched between the substrates.
- Various members such as a light source and a casing provided in the liquid crystal display device 100 are omitted here.
- the TFT array substrate 110 has pixel driving copper wirings 200 disposed on the main surface of the glass substrate 111.
- the copper wiring 200 is a source line 210, a gate line 220, and an auxiliary capacitance wiring (Cs wiring) 230, as shown in FIG.
- the source lines 210 and the gate lines 220 are arranged in a grid pattern on the main surface of the glass substrate 111, and the Cs wiring 230 is arranged in parallel between the adjacent gate lines 220.
- a TFT 250 as a switching element is formed in the vicinity of the intersection of the source line 210 and the gate line 220.
- a red (R) CF layer 310R, a blue (B) CF layer 320B, and a green (G) CF layer 330G are arranged for each pixel region on the main surface of the glass substrate 121.
- the CF layers 310R, 320B, and 330G are partitioned by a light shielding unit 400 called a black matrix.
- external light such as a fluorescent lamp enters the device through the CF layers 310R, 320B, and 330G from the display surface side. To do.
- the light passes through the liquid crystal layer 130 and is reflected by the surface of the copper wiring 200.
- the reflected light passes through the liquid crystal layer 130 again, passes through the CF layers 310R, 320B, and 330G and is emitted to the outside.
- the CF layers 310R, 320B, and 330G have different light transmittances as shown in FIG. Specifically, the CF layer 310R easily transmits light having a wavelength of about 620 nm to 680 nm, the CF layer 330G transmits light having a wavelength of about 520 nm to 580 nm, and the CF layer 320B has a wavelength of about 420 nm or more. It is easy to transmit light of 480 nm or less.
- the copper wiring 200 exhibits a reflection characteristic different from that of a metal material such as aluminum or titanium.
- the copper wiring 200 has a low reflectivity with respect to a wavelength of about 340 nm to 540 nm, gradually increases in a range of about 540 nm to 590 nm, and has a high reflectivity with respect to a wavelength exceeding 600 nm. ing. That is, the surface of the copper wiring 200 is likely to reflect long wavelength light, that is, reddish light.
- the wiring formed of aluminum or titanium shows a substantially constant reflectance from the short wavelength side to the long wavelength side, it does not reflect light of a specific color.
- the CF layer 310R has a longer wavelength side due to the properties of the CF layers 310R, 320B, and 330G and the properties of the copper wiring 200.
- the transmitted light is easily reflected on the surface of the copper wiring 200, and the reflected light is easily transmitted through the CF layer 310R to the outside of the device. Red coloration tends to occur.
- the reflected light generated on the surface of the copper wiring 200 is generated on the surface of the copper wiring 200 that does not overlap the light shielding portion 400 when the display surface is viewed from the normal direction.
- the source lines 210 since all the source lines 210 are covered with the light shielding portion 400, they are generated on the surface of the copper wiring 200 that does not overlap the light shielding portion 400 of the gate line 220 and the Cs wiring 230.
- the wiring area of the copper wiring that reflects external light is larger than the pixel area having the CF layers 320B and 330G (hereinafter also referred to as blue pixel area B and green pixel area G).
- the red pixel region R is configured to be small.
- the light shielding portion 410 is provided in a region overlapping with the gate line 220 having a wide average width to adjust the wiring area of the copper wiring 200.
- the light shielding part 410 is provided between adjacent light shielding parts 400 formed on the CF substrate 120.
- the length of the light shielding portion 420 provided in the red pixel region R is shortened as in the liquid crystal display device 210 shown in FIG. 1 is smaller than the area of the light-shielding portion 410 shown in FIG. 1, and overlaps with a part of the gate line 220 when the display surface is viewed from the normal direction in the blue pixel region B and the green pixel region G.
- a configuration in which a light shielding portion 430 is further provided may be employed. Also with such a configuration, the wiring area in the red pixel region R can be made smaller than that in the blue pixel region B and the green pixel region G, and coloring of the display screen can be reduced.
- the present embodiment will be described with specific examples.
- Example 1 In this example, a 53 type liquid crystal display device was used as the liquid crystal display device 100 shown in FIG.
- the resolution was a full high-definition resolution (horizontal 1920 ⁇ vertical 1080), and the pixel pitch was 600 ⁇ m ⁇ 200 ⁇ m.
- the average width d1 of the gate line 220 is 30 ⁇ m
- the average width d2 of the Cs wiring 230 is 15 ⁇ m.
- the average width of the light shielding portion 410 covering the gate line 220 is set to 16.5 ⁇ m.
- the hue (CIE-y, CIE-x) of the obtained liquid crystal display device 100 has the same configuration as that of the present embodiment, but is compared with the hue of the liquid crystal display device in which the wiring is formed of aluminum. It was.
- FIG. 7 is a graph showing the hues of the copper wiring and the aluminum wiring according to this example.
- the CIE-x axis indicates that the smaller the value is, the more blue it is, and the larger the value, the more red it is.
- the CIE-y axis indicates that the smaller the value, the more green, and the larger the value, the more blue.
- FIG. 8 is a graph showing the relationship between the wiring area ratio and the color difference in the liquid crystal display device 100 according to this example. As shown in this graph, when the wiring area ratio of the copper wiring 200 in the red pixel region R to the wiring area of the copper wiring 200 in the blue pixel region B and the green pixel region G becomes 0.7, the color difference Became the minimum. In the liquid crystal display device 100 having a color difference in the range of 0.6 to 0.8, red coloration of the display screen due to reflected light was suppressed, and good display characteristics were obtained.
- the liquid crystal display device 100 when the color difference is 0.7 can suppress the coloring of red, particularly when displaying black in a bright place with external light such as a living room, and can feel a tight black. Appearance was also excellent.
- Comparative Example 1 9 and 10 show the configuration of the pixel of the liquid crystal display device according to Comparative Example 1, FIG. 9 is a schematic plan view, and FIG. 10 is a schematic cross-sectional view taken along line AB in FIG.
- a liquid crystal display device 500 in which the wiring area of the copper wiring is not adjusted will be described.
- the wiring area of the copper wiring 200 is the same.
- Embodiment 2 when the display surface is viewed in the normal direction, the light shielding portion that overlaps with the gate line 220 is provided to adjust the wiring area in the red pixel region R. However, in this embodiment, the Cs wiring 230 overlaps. The wiring area is adjusted by providing a light shielding portion.
- FIG. 11 is a schematic plan view showing the configuration of the pixels of the liquid crystal display device 300 according to the present embodiment.
- a light shielding portion 440 is provided at a position overlapping with the Cs wiring 230 in the copper wiring in the red pixel region R.
- the wiring area of the copper wiring in the red pixel region R is smaller than the wiring area of the copper wiring 200 in the blue pixel region B and the green pixel region G. An effect is obtained.
- the configuration according to the first embodiment may be further added.
- the light shielding portion may be provided at a position overlapping with both the Cs wiring 230 and the gate line 220.
- the present invention is not limited thereto. If there is a copper wiring other than the pixel driving copper wiring 200, the wiring area may be adjusted by providing a light shielding portion at a position overlapping the copper wiring.
- Embodiment 3 In each of the above embodiments, the wiring area is adjusted by providing a light shielding portion that overlaps the copper wiring 200 in the red pixel region R. However, in the present embodiment, the wiring area is reduced by changing the shape of the copper wiring 200. adjust.
- FIG. 12 is a schematic plan view showing the configuration of the pixels of the liquid crystal display device 400 according to the present embodiment.
- the average width d3 of the gate line 220a in the copper wiring in the red pixel region R is narrower than the average width d1 of the gate line 220 in the blue pixel region B and the green pixel region G.
- the average width d3 of the gate line 220a is not particularly limited.
- the wiring area of the copper wiring in the red pixel region R is smaller than the wiring area of the copper wiring in the other blue pixel region B and the green pixel region G, and even with such a configuration, the red pixel Since the reflected light in the region R can be reduced, coloring on the display screen can be suppressed.
- the average width d3 of the gate line 220a can be easily adjusted by simply changing the mask pattern when forming the pattern of the gate line 220.
- the resistance value is improved by narrowing the wiring width.
- copper is a material having a very low resistance compared to aluminum, titanium, etc.
- variation in luminance due to signal response delay is caused.
- the coloration of the display screen can be improved without occurring.
- the wiring area of the copper wiring 200 is the red pixel area R when the wiring area of the copper wiring in the blue pixel area B and the green pixel area G is 1, as in the above embodiments. It is preferable that the wiring area is a ratio of 0.6 to 0.8.
- the configuration in which the wiring width is narrowed to reduce the wiring area of the copper wiring 200 is not limited to the one in which the wiring width of the gate line 220a is narrowed.
- the wiring width of the Cs wiring 230 may be reduced.
- the wiring area of the copper wiring 200 in the red pixel region R can be reduced by combining the configuration according to the present embodiment and the configuration according to the first and second embodiments.
- a liquid crystal display device including three color filter layers of red (R), blue (B), and green (G) has been described as an example.
- the present invention is not limited to this.
- any color filter layer including at least red (R) and having two or more colors can be applied.
- a liquid crystal display device including four color filter layers of red (R), blue (B), green (G), and yellow (Y) can be given.
- the liquid crystal display device has been described as an example.
- the present invention is not limited to this, and an organic EL display device, a plasma display display device, and a field emission display using copper wiring are used. It can also be applied to display devices.
- Liquid crystal display device 111 100, 210, 300, 500 Liquid crystal display device 111, 121 Glass substrate 110 TFT array substrate 120 CF substrate 130 Liquid crystal layer 200 Copper wiring 210 Source line 220, 220a Gate line 230 Cs wiring 250 TFT 310R, 320B, 330G CF layer 400, 410, 420, 430, 440
Abstract
Description
本実施形態では、赤(R)、青(B)、緑(G)の3色のカラーフィルタ(CF)層を備えた液晶表示装置であって、遮光部によって銅配線の面積を調節する形態について、図1~図6を用いて説明する。
以下に、本実施形態について具体例を挙げて説明する。
本実施例では、図1に示す液晶表示装置100として、53型の液晶表示装置を用いた。解像度は、フルハイビジョンの解像度(横1920×縦1080)とし、画素ピッチは、600μm×200μmとした。また、ゲート線220の平均幅d1を30μm、Cs配線230の平均幅d2を15μmとした。更に、赤色の画素領域Rにおいて、ゲート線220を覆う遮光部410の平均幅を16.5μmとした。
図9及び図10は、比較例1に係る液晶表示装置の画素の構成を示し、図9は平面模式図であり、図10は、図9のA-B線に沿う断面模式図である。比較例1では、銅配線の配線面積の調整を行っていない液晶表示装置500について説明する。
上記実施形態では、表示面を法線方向見たときに、ゲート線220と重畳する遮光部を設けて赤色の画素領域Rにおける配線面積を調整したが、本実施形態では、Cs配線230と重畳する遮光部を設けることによって配線面積を調整する。
上記各実施形態では、赤色の画素領域Rにおいて、銅配線200と重畳する遮光部を設けることによって配線面積を調整したが、本実施形態では、銅配線200の形状を変化させることにより配線面積を調整する。
111、121 ガラス基板
110 TFTアレイ基板
120 CF基板
130 液晶層
200 銅配線
210 ソース線
220、220a ゲート線
230 Cs配線
250 TFT
310R、320B、330G CF層
400、410、420、430、440 遮光部
Claims (8)
- 複数の画素領域を有する表示装置であって、
各画素領域は、銅又はその合金を含有する銅配線と、赤色の着色層及び他色の着色層を有し、
該表示装置の表示面側から入射した入射光を反射する該銅配線の配線面積は、他色の着色層を有する画素領域よりも赤色の着色層を有する画素領域において小さいことを特徴とする表示装置。 - 前記画素領域は、前記銅配線よりも表示面側に、前記入射光を遮光する遮光部を更に備え、
表示面を法線方向から見たときに、該遮光部と重畳しない前記銅配線の配線面積は、他色の着色層を有する画素領域よりも赤色の着色層を有する画素領域において小さいことを特徴とする請求項1記載の表示装置。 - 前記銅配線の平均幅は、他色の着色層を有する画素領域よりも赤色の着色層を有する画素領域において狭いことを特徴とする請求項1又は2記載の表示装置。
- 前記配線面積は、他色の着色層を有する画素領域における該配線面積を1としたときに、赤色の着色層を有する画素領域における該配線面積が0.6~0.8の割合であることを特徴とする請求項1~3のいずれかに記載の表示装置。
- 前記表示装置は、前記銅配線が形成されたアレイ基板と、前記着色層及び前記遮光部が形成されたカラーフィルタ基板とを備えることを特徴とする請求項1~4のいずれかに記載の表示装置。
- 前記銅配線は、前記アレイ基板が備える画素駆動用配線であることを特徴とする請求項5記載の表示装置。
- 前記銅配線は、保持容量配線であることを特徴とする請求項6記載の表示装置。
- 前記銅配線は、ゲート配線であることを特徴とする請求項6記載の表示装置。
Priority Applications (6)
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RU2012110373/28A RU2491589C1 (ru) | 2009-08-20 | 2010-08-05 | Устройство отображения |
JP2011527633A JP5179669B2 (ja) | 2009-08-20 | 2010-08-05 | 表示装置 |
CN201080036497.2A CN102472937B (zh) | 2009-08-20 | 2010-08-05 | 显示装置 |
US13/390,716 US8476654B2 (en) | 2009-08-20 | 2010-08-05 | Display device |
EP10809855.9A EP2469330A4 (en) | 2009-08-20 | 2010-08-05 | DISPLAY DEVICE |
BR112012003630A BR112012003630A2 (pt) | 2009-08-20 | 2010-08-05 | dispositivo de exibição |
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JP2009191330 | 2009-08-20 | ||
JP2009-191330 | 2009-08-20 |
Publications (1)
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WO2011021510A1 true WO2011021510A1 (ja) | 2011-02-24 |
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PCT/JP2010/063292 WO2011021510A1 (ja) | 2009-08-20 | 2010-08-05 | 表示装置 |
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US (1) | US8476654B2 (ja) |
EP (1) | EP2469330A4 (ja) |
JP (1) | JP5179669B2 (ja) |
CN (1) | CN102472937B (ja) |
BR (1) | BR112012003630A2 (ja) |
RU (1) | RU2491589C1 (ja) |
WO (1) | WO2011021510A1 (ja) |
Cited By (2)
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JP2013182853A (ja) * | 2012-03-05 | 2013-09-12 | Dainippon Printing Co Ltd | 薄膜素子用基板、薄膜素子、有機エレクトロルミネッセンス表示装置、および電子ペーパー |
WO2016039210A1 (ja) * | 2014-09-12 | 2016-03-17 | シャープ株式会社 | 表示装置 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011104943A1 (ja) * | 2010-02-24 | 2011-09-01 | シャープ株式会社 | 液晶表示パネル及び液晶表示装置 |
EP3012820B1 (en) * | 2013-06-17 | 2018-04-04 | Toppan Printing Co., Ltd. | Substrate for display device, and display device using same |
CN110603576B (zh) * | 2017-05-12 | 2021-12-03 | 索尼公司 | 显示装置 |
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- 2010-08-05 EP EP10809855.9A patent/EP2469330A4/en not_active Withdrawn
- 2010-08-05 WO PCT/JP2010/063292 patent/WO2011021510A1/ja active Application Filing
- 2010-08-05 RU RU2012110373/28A patent/RU2491589C1/ru not_active IP Right Cessation
- 2010-08-05 CN CN201080036497.2A patent/CN102472937B/zh active Active
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US20120168785A1 (en) | 2012-07-05 |
US8476654B2 (en) | 2013-07-02 |
JP5179669B2 (ja) | 2013-04-10 |
EP2469330A1 (en) | 2012-06-27 |
RU2491589C1 (ru) | 2013-08-27 |
BR112012003630A2 (pt) | 2016-03-22 |
EP2469330A4 (en) | 2013-10-16 |
CN102472937B (zh) | 2014-10-01 |
JPWO2011021510A1 (ja) | 2013-01-24 |
CN102472937A (zh) | 2012-05-23 |
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