WO2015141739A1

WO2015141739A1 - Liquid crystal display device

Info

Publication number: WO2015141739A1
Application number: PCT/JP2015/058106
Authority: WO
Inventors: 倫久山田; 正樹柳沢
Original assignee: 株式会社オルタステクノロジー
Priority date: 2014-03-19
Filing date: 2015-03-18
Publication date: 2015-09-24
Also published as: JP2015179217A

Abstract

This liquid crystal display device (10) contains: substrates (21, 22); a liquid crystal layer (23) sandwiched between the substrates (21, 22); a light blocking membrane (BM) provided on the substrate (22) and demarcating a plurality of pixels; a color filter (34) provided to the plurality of openings of the light blocking membrane (BM) on the substrate (22); a common electrode (35) provided on the color filter (34) and the light blocking membrane (BM); a signal line (SL) provided on the substrate (21); and a pixel electrode (27) provided above the signal line (SL) with an insulating film therebetween, electrically connected to the signal line (SL), and provided corresponding to the pixels. The light blocking membrane (BM) is disposed above the signal line (SL) without the color filer (34) therebetween.

Description

Liquid crystal display

The present invention relates to a liquid crystal display device.

Various liquid crystal display devices capable of color display have been developed. For example, a color filter is used in a liquid crystal display device that performs color display.

For example, a common electrode is formed on the entire surface of the color filter substrate on which the color filter is formed. From the viewpoint of controlling the alignment of the liquid crystal layer, the common electrode is desirably flat. For this reason, the coloring members of a plurality of colors constituting the color filter are arranged without a gap, and the color filter is often arranged outside the active area as in the inside of the active area.

However, when the color filter is made flat, the distance between the common electrode and the wiring arranged via the liquid crystal layer is shortened. This increases the capacitance on the wiring, resulting in an increase in current consumption of the liquid crystal display device.

Japanese Patent Application Laid-Open No. 07-120608 Japanese Patent Laid-Open No. 06-265870

The present invention provides a liquid crystal display device capable of reducing current consumption by reducing the capacitance between the common electrode and the wiring via the liquid crystal layer.

A liquid crystal display device according to one embodiment of the present invention includes a first substrate, a second substrate, a liquid crystal layer sandwiched between the first substrate and the second substrate, and a plurality of pixels provided over the first substrate. A light shielding film, a color filter provided on the first substrate and in a plurality of openings of the light shielding film, a common electrode provided on the light shielding film and the color filter, and provided on the second substrate. And a pixel electrode provided above the signal line via an insulating film, electrically connected to the signal line, and provided to correspond to the pixel. The light shielding film is disposed above the signal line without passing through the color filter.

According to the present invention, it is possible to provide a liquid crystal display device capable of reducing current consumption by reducing the capacitance between the common electrode and the wiring via the liquid crystal layer.

1 is a schematic plan view of a liquid crystal display device according to a first embodiment. FIG. 2 is a circuit diagram of a pixel array included in an active area shown in FIG. 1. 1 is a plan view of a liquid crystal display device according to a first embodiment. FIG. 4 is a cross-sectional view of the liquid crystal display device along line A-A ′ shown in FIG. 3. FIG. 4 is a cross-sectional view of the liquid crystal display device along line B-B ′ shown in FIG. 3. The top view of the wiring provided in the TFT substrate. The top view of the liquid crystal display device which concerns on a 1st modification. FIG. 8 is a cross-sectional view of the liquid crystal display device along the line B-B ′ shown in FIG. 7. The top view of the liquid crystal display device which concerns on a 2nd modification. The top view of the liquid crystal display device which concerns on a comparative example. FIG. 11 is a cross-sectional view of the liquid crystal display device along line A-A ′ shown in FIG. 10. The top view of the liquid crystal display device which concerns on another comparative example. FIG. 5 is a schematic plan view of a liquid crystal display device according to a second embodiment of the present invention. The top view of the liquid crystal display device which concerns on 2nd Embodiment. FIG. 15 is a cross-sectional view of the liquid crystal display device along line A-A ′ shown in FIG. 14. The top view of the liquid crystal display device which has a delta arrangement | sequence. Sectional drawing of the liquid crystal display device which concerns on a 1st modification. Sectional drawing of the liquid crystal display device which concerns on a 2nd modification.

Hereinafter, embodiments will be described with reference to the drawings. However, it should be noted that the drawings are schematic or conceptual, and the dimensions and ratios of the drawings are not necessarily the same as the actual ones. Further, even when the same portion is represented between the drawings, the dimensional relationship and ratio may be represented differently. In particular, the following embodiments exemplify an apparatus and a method for embodying the technical idea of the present invention, and the technical idea of the present invention depends on the shape, structure, arrangement, etc. of components. Is not specified. In the following description, elements having the same function and configuration are denoted by the same reference numerals, and redundant description will be given only when necessary.

[First Embodiment]
[1. Overall Configuration of Liquid Crystal Display Device 10]
FIG. 1 is a schematic plan view of a liquid crystal display device 10 according to the first embodiment of the present invention. In the present embodiment, the active matrix type liquid crystal display device 10 will be described as an example. The liquid crystal display device 10 includes an active area (effective display area) 11 on which an image is displayed, and a peripheral area 12 provided around the active area 11.

The active area 11 is provided with a pixel array composed of a plurality of pixels. The peripheral area 12 is provided with a peripheral circuit for driving and controlling the pixel array. The peripheral area 12 is shielded by a light shielding film (black matrix), which will be described later, and is visually recognized as a black region by an observer.

FIG. 2 is a circuit diagram of the pixel array included in the active area 11 shown in FIG. In FIG. 2, four pixels are extracted and shown.

In the active area 11, a plurality of scanning lines GL each extending in the row direction (X direction) and a plurality of signal lines SL each extending in the column direction (Y direction) are arranged. A pixel 13 is disposed in each of the intersecting regions of the plurality of scanning lines GL and the plurality of signal lines SL.

The pixel 13 includes a switching element 14, a liquid crystal capacitor Clc, and a storage capacitor Cs. As the switching element 14, for example, a TFT (Thin-Film-Transistor) is used. The source of the TFT 14 is electrically connected to the signal line SL. The gate of the TFT 14 is electrically connected to the scanning line GL. The drain of the TFT 14 is electrically connected to the liquid crystal capacitor Clc. The liquid crystal capacitor Clc includes a pixel electrode, a common electrode, and a liquid crystal layer sandwiched between them.

The storage capacitor Cs is connected in parallel to the liquid crystal capacitor Clc. The storage capacitor Cs has a function of suppressing the potential fluctuation generated in the pixel electrode and holding the drive voltage applied to the pixel electrode until the drive voltage corresponding to the next signal is applied. The storage capacitor Cs includes a pixel electrode, a storage electrode (storage capacitor line), and an insulating film sandwiched between them. A common voltage Vcom is applied to the common electrode and the storage electrode.

Peripheral circuits provided in the peripheral area 12 include, for example, a scanning driver (scanning line driving circuit) 15, a signal driver (signal line driving circuit) 16, a common voltage supply circuit 17, a voltage generation circuit (not shown), and a control. A circuit (not shown) and the like are included.

The scanning driver 15 is connected to a plurality of scanning lines GL through lead lines described later. The scan driver 15 applies a scan signal for controlling on and off of the TFT 14 to the scan line GL. The signal driver 16 is connected to a plurality of signal lines SL through lead lines described later. The signal driver 16 applies a gradation signal (drive voltage) corresponding to the display image to the signal line SL. The common voltage supply circuit 17 generates a common voltage Vcom and supplies it to the pixel array. The control circuit supplies control signals to the scanning driver 15, the signal driver 16, and the common voltage supply circuit 17, respectively. The voltage generation circuit generates various voltages necessary for the operation of the liquid crystal display device 10 and supplies them to each circuit unit.

In the liquid crystal display device 10 configured as described above, when the TFT 14 included in an arbitrary pixel 13 is turned on, a driving voltage is applied to the pixel electrode via the signal line SL, and the voltage between the driving voltage and the common voltage Vcom is determined. The alignment state of the liquid crystal changes according to the difference. Thereby, the transmission state of the light incident on the liquid crystal display device 10 from the light source is changed, and image display is performed.

[2. Specific Configuration of Liquid Crystal Display Device 10]
Next, a more specific configuration of the liquid crystal display device 10 will be described. FIG. 3 is a plan view of the liquid crystal display device 10. 4 is a cross-sectional view of the liquid crystal display device 10 taken along line AA ′ shown in FIG. FIG. 5 is a cross-sectional view of the liquid crystal display device 10 taken along line BB ′ shown in FIG. FIG. 3 is a configuration example of the stripe arrangement of the color filter.

The liquid crystal display device 10 includes a TFT substrate 21 on which TFTs as switching elements and pixel electrodes are formed, and a color filter substrate (CF substrate) on which a color filter, a common electrode, and the like are formed and arranged opposite to the TFT substrate 21. 22 and a liquid crystal layer 23 sandwiched between the TFT substrate 21 and the CF substrate 22. Each of the TFT substrate 21 and the CF substrate 22 is composed of a transparent substrate (for example, a glass substrate).

The liquid crystal layer 23 is composed of a liquid crystal material sealed by a sealing material 24 that bonds the TFT substrate 21 and the CF substrate 22 together. An alignment film (not shown) for controlling the alignment of the liquid crystal molecules is formed on the TFT substrate 21 and the CF substrate 22 so as to be in contact with the liquid crystal layer 23 and sandwich the liquid crystal layer 23. The cell gap of the liquid crystal layer 23 is controlled by a spacer (not shown) provided in the liquid crystal layer 23. In the liquid crystal material, the orientation of liquid crystal molecules is controlled according to the electric field, and the optical characteristics change. The display method of the liquid crystal display device 10 is not particularly limited, and various display methods such as a TN (Twisted Nematic) mode, a VA (Vertical Alignment) mode, an IPS (In-Plane Switching) mode, and an OCB (Optically Compensated Bend) mode. Is applicable.

First, the structure of the liquid crystal display device 10 in the active area 11 will be described. A scanning line (gate line) GL and a storage capacitor line Cs are provided on the TFT substrate 21 (on the liquid crystal layer 23 side) in the active area 11. An insulating film 25 is provided on the scanning line GL and the storage capacitor line Cs. A signal line (source line) SL is provided on the insulating film 25. An insulating film 26 is provided on the signal line SL. A pixel electrode 27 is provided on the insulating film 26.

FIG. 6 is a plan view of the wiring provided on the TFT substrate 21. The scanning line GL extends in the X direction. The scanning line GL includes an electrode portion that extends to below the semiconductor layer 29 constituting the TFT 14. A semiconductor layer 29 is provided over the electrode portion of the scanning line GL via a gate insulating film.

The signal line SL extends in the Y direction. One end of the electrode 28 is electrically connected to the signal line SL, and the other end is disposed so as to partially overlap the semiconductor layer 29 constituting the TFT 14. The electrode 30 is provided to be separated from the electrode 28 in the Y direction, and is disposed so that one end thereof partially overlaps the semiconductor layer 29. The TFT 14 includes a scanning line GL, a semiconductor layer 29, and

electrodes

28 and 30. The TFT 14 is not shown in the cross-sectional views of FIGS. 4 and 5. A contact plug 31 is provided at the other end of the electrode 30, and the contact plug 31 is electrically connected to the pixel electrode 27.

The storage capacitor line Cs is composed of a first wiring portion extending in the X direction and a plurality of second wiring portions extending in the Y direction from the first wiring portion. The first and second wiring portions constituting the storage capacitor line Cs are arranged so as to overlap the pixel electrode 27.

Referring back to FIG. 4, a light shielding film (black matrix) BM that partitions the plurality of pixels 13 is provided on the CF substrate 22 (the liquid crystal layer 23 side) in the active area 11. The black matrix BM is provided at a boundary portion between the plurality of pixels 13 and has a plurality of openings OP corresponding to the plurality of pixels 13. The black matrix BM has a function of shielding light unnecessary for display between the pixels 13. The black matrix BM is formed in, for example, a lattice shape (knitting shape). The black matrix BM is composed of, for example, a black resin containing a dye or pigment as a coloring material.

A color filter 34 is provided on the CF substrate 22 and in the opening OP of the black matrix BM. That is, the color filter 34 is provided above the plurality of pixel electrodes 27.

The color filter 34 includes a plurality of coloring members, and specifically includes a plurality of red filters 34-R, a plurality of green filters 34-G, and a plurality of blue filters 34-B. The color filter 34 is made of a colored resin, for example. A general color filter is composed of three primary colors of light, red (R), green (G), and blue (B). A set of three colors R, G, and B adjacent to each other is a display unit (referred to as a pixel or a pixel), and any single color portion of R, G, or B in one pixel is a subpixel (subpixel). This is a minimum drive unit called a pixel. The TFT 14 and the pixel electrode 27 are provided for each subpixel. In the following description, a subpixel is referred to as a pixel unless it is particularly necessary to distinguish between a pixel and a subpixel. In the example of the color filter of FIG. 3, the color filter is formed in a line shape. That is, a line-shaped coloring member is provided in a plurality of pixels of the same color arranged in the Y direction.

A common electrode 35 is provided on the color filter 34 and the black matrix BM. The common electrode 35 is formed on the entire surface of the active area 11 and the peripheral area 12.

Next, the structure of the liquid crystal display device 10 in the peripheral area 12 will be described. On the TFT substrate 21 in the peripheral area 12 (on the liquid crystal layer 23 side), a plurality of lead lines (lead lines) 32 for the scanning lines GL are provided. The lead line 32 is a wiring for electrically connecting the plurality of scanning lines GL to the scanning driver 15. In the peripheral area 12, a plurality of lead lines (lead lines) 33 for the signal lines SL are provided on the insulating film 25. The lead line 33 is a wiring for electrically connecting the plurality of signal lines SL to the signal driver 16.

The black matrix BM is provided on the entire surface of the peripheral area 12 on the CF substrate 22 (on the liquid crystal layer 23 side). On the black matrix BM, the color filter 34 is provided partially or entirely. The color filter 34 in the peripheral area 12 is formed in the same pattern as the color filter in the active area 11.

The pixel electrode 27 and the common electrode 35 are composed of transparent electrodes, and for example, ITO (indium tin oxide) is used. The insulating

films

25 and 26 are made of a transparent insulating material, and for example, silicon nitride (SiN) is used. The scanning line GL, the signal line SL, the storage capacitor line Cs, and the lead lines 32 and 33 are made of a low-resistance conductive material. For example, aluminum (Al), molybdenum (Mo), chromium (Cr), tungsten (W ) Or an alloy containing one or more of these.

(Capacitance)
Here, as shown in FIGS. 3 and 4, in the present embodiment, the red filter 34-R, the green filter 34-G, and the blue filter 34-B arranged in the X direction are not in contact with each other, and the pixels Each color filter is arranged with a space SP therebetween so as to be isolated in an island shape (in a line shape in the example of FIG. 3).

Further, the signal line SL is arranged in the space SP of the color filter 34 in plan view. That is, the signal line SL faces the black matrix BM without passing through the color filter 34. In other words, the black matrix BM is arranged above the signal line SL without using the color filter 34.

When the dielectric constant ε _LC of the liquid crystal layer 23, the area S _{SL of} the signal line SL, and the thickness d ₁ of the liquid crystal layer 23 on the signal line SL, the electrostatic capacitance C ₁ on the signal line SL is expressed by the following equation (1 ).

C ₁ = ε _LC · S _SL / d ₁ (1)

In the present embodiment, it can be increased thickness d ₁ of the liquid crystal layer 23 on the signal line SL. Thus, it is possible to reduce the capacitance C ₁ of the signal line SL.

[3. Modified example]
FIG. 7 is a plan view of the liquid crystal display device 10 according to the first modification. FIG. 8 is a cross-sectional view of the liquid crystal display device 10 taken along the line BB ′ shown in FIG. A cross-sectional view of the liquid crystal display device 10 along the line AA ′ shown in FIG. 7 is the same as FIG. FIG. 7 is a configuration example of a stripe arrangement.

The plurality of red filters 34-R, the plurality of green filters 34-G, and the plurality of blue filters 34-B are separated for each pixel, and each filter is formed in an island shape. That is, the plurality of red filters 34-R arranged in the Y direction are arranged with a space SP therebetween. The green filter 34-G and the blue filter 34-B are the same as the red filter 34-R.

In a plan view, the scanning line GL is arranged in the space SP of the color filter 34. That is, the scanning line GL faces the black matrix BM without passing through the color filter 34. According to the first modification, similarly to the signal line SL, the capacitance on the scanning line GL can be further reduced.

FIG. 9 is a plan view of the liquid crystal display device 10 according to the second modification. FIG. 9 is a configuration example of a delta arrangement.

The red filter 34-R, the green filter 34-G, and the blue filter 34-B constituting the color filter 34 are arranged in a delta shape (triangle). In plan view, the signal line SL and the scanning line GL are disposed in the space of the red filter 34-R, the green filter 34-G, and the blue filter 34-B. Thus, this embodiment is applicable also to a delta arrangement.

[4. Comparative example]
Next, a comparative example will be described. FIG. 10 is a plan view of a liquid crystal display device according to a comparative example. FIG. 11 is a cross-sectional view of the liquid crystal display device along the line AA ′ shown in FIG. FIG. 10 is a configuration example of a stripe arrangement.

The color filter 34 of the comparative example has a flat structure. That is, the red filter 34 -R, the green filter 34 -G, and the blue filter 34 -B arranged in the X direction are formed so as to contact each other without leaving a space. The common electrode 35 provided on the color filter 34 is formed in a planar shape with no step.

When the dielectric constant ε _LC of the liquid crystal layer 23, the area S _{SL of} the signal line SL, and the thickness d ₂ of the liquid crystal layer 23 on the signal line SL, the capacitance C ₂ on the signal line SL is expressed by the following equation (2 ).

C ₂ = ε _LC · S _SL / d ₂ (2)

When this embodiment is compared with the comparative example, since “d ₁ > d ₂ ”, “C ₁ <C ₂ ” is obtained. Therefore, in the comparative example, since the capacitance C ₂ is increased, the current consumption of the liquid crystal display device is increased. On the other hand, the present embodiment can reduce the capacitance on the signal line SL compared to the comparative example. Similarly, this embodiment can reduce the capacitance on the scanning line GL as compared with the comparative example.

As an example, assuming a TN mode liquid crystal display device and d ₁ = 5.5 μm and d ₂ = 4.5 μm, “C ₁ ≈0.82 C ₂ ”. That is, according to the present embodiment, the capacitance on the signal line SL can be reduced by a little less than about 20% compared to the comparative example, and the corresponding current consumption can be reduced. The effect of reducing the capacitance is the same for the capacitance on the scanning line GL.

FIG. 12 is a plan view of a liquid crystal display device according to another comparative example. FIG. 12 is a configuration example of a delta arrangement. Also in the delta arrangement of the comparative example, the color filter has a flat structure. Therefore, also in the delta arrangement, the electrostatic capacitances on the signal lines SL and the scanning lines GL increase as in the stripe arrangement.

Also in the delta arrangement, the present embodiment can reduce the electrostatic capacity on the signal line SL and the electrostatic capacity on the scanning line GL as compared with the comparative example, and the corresponding consumption current can be reduced.

[5. effect]
As described above in detail, in the first embodiment, the red filter 34-R, the green filter 34-G, and the blue filter 34-B arranged in the direction intersecting with the signal line SL are not in contact with each other and are not spaced from each other. The SP is arranged with a space. A black matrix BM is disposed above the signal line SL without using the color filter 34. Similarly to the signal line SL, the black matrix BM is arranged above the scanning line GL without the color filter 34 interposed therebetween.

Therefore, according to the first embodiment, the thickness of the liquid crystal layer 23 on the signal line SL can be increased. Thereby, the electrostatic capacitance on the signal line SL can be reduced. As a result, the current consumption of the liquid crystal display device 10 can be reduced. Similarly, since the electrostatic capacity on the scanning line GL can be reduced, the current consumption of the liquid crystal display device 10 can be further reduced.

Further, while the thickness of the liquid crystal layer on the signal line SL and the scanning line GL is reduced, the thickness of the liquid crystal layer 23 on the pixel electrode 27 is not changed. Thereby, the current consumption of the liquid crystal display device 10 can be reduced without affecting the characteristics of the pixels.

[Second Embodiment]
In the second embodiment, the current consumption of the liquid crystal display device 10 is further reduced by reducing the capacitance of the peripheral area 12.

FIG. 13 is a schematic plan view of the liquid crystal display device 10 according to the second embodiment of the present invention. FIG. 14 is a more detailed plan view of the liquid crystal display device 10. FIG. 15 is a cross-sectional view of the liquid crystal display device 10 taken along line A-A ′ shown in FIG. 14. FIG. 14 shows a configuration example of a stripe arrangement. The configuration of the active area 11 is the same as that of the first embodiment.

The color filter 34 is disposed only in the active area 11 and is not disposed in the peripheral area 12. Specifically, as shown in FIG. 15, a black matrix BM is provided on the CF substrate 22 in the peripheral area 12. The color filter 34 is not provided on the black matrix BM in the peripheral area 12. In the peripheral area 12, the color filter 34 may not be formed at least above the lead lines 32 and 33. Further, for example, in consideration of manufacturing errors, the color filter 34 is formed so as to protrude somewhat from the boundary of the active area 11 to the peripheral area 12 side.

When the dielectric constant ε _LC of the liquid crystal layer 23, the area S _{LD of} the lead line 32, and the thickness d ₃ of the liquid crystal layer 23 on the lead line 32, the capacitance C ₃ on the lead line 32 is expressed by the following equation (3 ).

C ₃ = ε _LC · S _LD / d ₃ (3)

Similarly, the capacitance on the lead wire 33 is expressed by the above equation (3).

In the comparative example of FIG. 11, the thickness d ₄ of the liquid crystal layer 23 on the lead line 32 and the capacitance C ₄ on the lead line 32 are used. As an example, assuming a TN mode liquid crystal display device and d ₃ = 5.5 μm and d ₄ = 4.0 μm, “C ₃ ≈0.73C ₄ ”. That is, this embodiment can reduce the capacitance on the lead-out line 32 by a little less than about 30% compared to the comparative example, and can reduce the corresponding current consumption. Similarly, the present embodiment can reduce the capacitance on the lead line 33 as compared with the comparative example.

FIG. 16 is a plan view of the liquid crystal display device 10 having a delta arrangement. Also in the delta arrangement, the current consumption of the liquid crystal display device 10 can be reduced as in the stripe arrangement.

(First modification)
FIG. 17 is a cross-sectional view of the liquid crystal display device 10 according to the first modification. In the first modification, the common electrode 35 is disposed only in the active area 11 and is not disposed in the peripheral area 12. Specifically, as shown in FIG. 17, only the black matrix BM is provided on the CF substrate 22 in the peripheral area 12, and the common electrode 35 is not provided on the black matrix BM in the peripheral area 12.

In the first modification, since the common electrode 35 is not disposed above the lead lines 32 and 33, the capacitance on the lead lines 32 and 33 can be eliminated. Thereby, the consumption current resulting from the electrostatic capacitance on the lead lines 32 and 33 can be reduced.

(Second modification)
FIG. 18 is a cross-sectional view of the liquid crystal display device 10 according to the second modification. A plan view of the liquid crystal display device 10 is the same as FIG.

In the second modification, the black matrix BM is configured using a light shielding material that can be formed and processed thinner than the resin. For the black matrix BM, for example, a light-shielding metal is used, and specifically, chromium (Cr) or a laminated film of chromium oxide and chromium is used.

In the second modified example, the thickness of the black matrix BM can be reduced as compared with the second embodiment. Therefore, in the second modification, the thickness d ₃ of the liquid crystal layer 23 on the lead lines 32 and 33, it is possible to increase in comparison with the second embodiment, it can be further reduced capacitance on the

lead wire

32, 33 . As a result, the current consumption of the liquid crystal display device 10 can be further reduced.

In the second modification, the thickness of the black matrix BM in the active area 11 can also be reduced. Thus, in the second modification, as compared with the first embodiment, since the thickness d ₁ of the liquid crystal layer 23 on the signal line SL can be further increased, thereby further reducing the capacitance on the signal line SL. As a result, the current consumption of the liquid crystal display device 10 can be further reduced. Similarly, the capacitance on the scanning line GL can be further reduced.

The present invention is not limited to the embodiment described above, and can be embodied by modifying the constituent elements without departing from the scope of the invention. Further, the above embodiments include inventions at various stages, and are obtained by appropriately combining a plurality of constituent elements disclosed in one embodiment or by appropriately combining constituent elements disclosed in different embodiments. Various inventions can be configured. For example, even if some constituent elements are deleted from all the constituent elements disclosed in the embodiments, the problems to be solved by the invention can be solved and the effects of the invention can be obtained. Embodiments made can be extracted as inventions.

DESCRIPTION OF SYMBOLS 10 ... Liquid crystal display device, 11 ... Active area, 12 ... Peripheral area, 13 ... Pixel, 14 ... Switching element, 15 ... Scan driver, 16 ... Signal driver, 17 ... Common voltage supply circuit, 21 ... TFT substrate, 22 ... Color Filter substrate, 23 ... Liquid crystal layer, 24 ... Sealing material, 25, 26 ... Insulating film, 27 ... Pixel electrode, 28, 30 ... Electrode, 29 ... Semiconductor layer, 31 ... Contact plug, 32, 33 ... Lead wire, 34 ... Color filter, 35 ... Common electrode.

Claims

First and second substrates;
A liquid crystal layer sandwiched between the first and second substrates;
A light shielding film provided on the first substrate and defining a plurality of pixels;
A color filter provided on the first substrate and at a plurality of openings of the light shielding film;
A common electrode provided on the light shielding film and the color filter;
A signal line provided on the second substrate;
A pixel electrode provided above the signal line via an insulating film, electrically connected to the signal line, and corresponding to a pixel;
Comprising
The liquid crystal display device, wherein the light shielding film is disposed above the signal line without the color filter.
A scanning line provided on the second substrate;
The liquid crystal display device according to claim 1, wherein the light shielding film is disposed above the scanning line without the color filter.
An active area in which the plurality of pixels are disposed;
A peripheral area in which peripheral circuits for driving the plurality of pixels are disposed;
A first lead line provided on the second substrate in the peripheral area and electrically connecting the signal line and the peripheral circuit;
Further comprising
The liquid crystal display device according to claim 1, wherein the light shielding film is disposed above the first lead line without the color filter interposed therebetween.
4. The liquid crystal display device according to claim 3, wherein the common electrode is not disposed above the lead line.
An active area in which the plurality of pixels are disposed;
A peripheral area in which peripheral circuits for driving the plurality of pixels are disposed;
A second lead line provided on the second substrate in the peripheral area and electrically connecting the scanning line and the peripheral circuit;
Further comprising
The liquid crystal display device according to claim 2, wherein the light shielding film is disposed above the second lead line without the color filter.
6. The liquid crystal display device according to claim 5, wherein the common electrode is not disposed above the lead line.
2. The liquid crystal display device according to claim 1, wherein the light shielding film is made of resin or metal.