JP2003255365A - Substrate for liquid crystal panel, its manufacturing method, liquid crystal display panel and electronic equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent irregularity of display, etc., by securing uniformity of cells in a peripheral breaking part and an image display part inside it. <P>SOLUTION: A first light shielding area that regulates a display area is arranged on a light transmission substrate, a cell thickness adjustment layer is provided on the substrate and a second light shielding area that regulates boundaries of a plurality of pixel areas is arranged on the cell thickness adjustment layer in the display area. The thickness of the cell thickness adjustment layer is determined so that thickness of the whole of the second light shielding area does not become less than thickness of the whole of the first light shielding area. Since the second light shielding area such as a black matrix is extremely thin in comparison with the first light shielding area such as the peripheral breaking parts, it is difficult to form the respective layers as thickness as designed values in the case of laminating a plurality of layers and the layer thickness of the second light shielding area tends to become thinner. Gaps of cells are uniformized over the entire display area and the irregularity of display, etc., can be prevented by raising the bottoms of the respective layers of the second light shielding area by providing the cell thickness adjustment layer and making the entire thickness as approximately equal to the thickness of the whole of the first light shielding area. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transflective liquid crystal display device, and more particularly to a color filter structure for making a cell thickness of a liquid crystal display panel uniform.

[0002]

BACKGROUND ART Conventionally, a reflective display utilizing external light,
BACKGROUND ART A transflective liquid crystal display panel is known that allows any of a transmissive display using illumination light such as a backlight to be visually recognized. This semi-transmissive reflective liquid crystal display panel has a reflective layer for reflecting external light inside the panel, and is configured so that illumination light from a backlight can pass through this reflective layer. is there. As this type of reflective layer, for example, there is one having a pattern having openings (slits) of a predetermined ratio for each pixel of the liquid crystal display panel.

Such a liquid crystal display panel is used in a mobile phone,
When installed in an electronic device such as a portable information terminal, the backlight is installed behind it. In this liquid crystal display panel, in a bright place such as daytime or indoors, external light passes through the liquid crystal, is then reflected by the reflective layer, and is again transmitted through the liquid crystal to be emitted, thereby performing a reflective display. On the other hand, in dark places such as at night or outdoors,
By turning on the backlight, of the illumination light emitted from the backlight, the light that has passed through the opening provided in the reflective layer is emitted through the liquid crystal display panel, and transmissive display is performed.

In the above-mentioned liquid crystal display panel, a light-shielding area called a peripheral partition or a frame which defines the outer edge of the image display area is formed. Specifically, a substantially rectangular light-shielding pattern is formed at a position corresponding to the outer edge of the image display area on the two opposing substrates forming the liquid crystal display panel (hereinafter, referred to as “peripheral parting”). The peripheral parting is R (red), G, like the black matrix formed in the color filter.
The colored layers of three colors (green) and B (blue) can be stacked and formed.

[0005]

However, when the peripheral parting and the black matrix are formed by overlapping coating of the R, G, and B colored layers, the part between the peripheral parting and the black matrix part in the image display area is formed. However, there is a problem that the layer thickness varies. The peripheral parting portion is about 3 in the plane of a liquid crystal display panel used for, for example, a mobile phone.
While the black matrix in the image display area is formed between adjacent pixels, the width is about 10 μm, while the black matrix is formed to have a width of ˜4 mm. Therefore, as described above, when the peripheral partition and the black matrix are formed by stacking the colored layers of three colors RGB, the peripheral partition has a relatively large width, so that each colored layer can be easily formed to the thickness as designed. On the other hand, the width of the black matrix part is much smaller than that of the peripheral partition, so RGB
It is difficult to form each of the colored layers with the thickness as designed. Therefore, among the laminated RGB colored layers, the colored layers located above the colored layers tend to be formed thinner. As a result, when the step of forming colored layers of each color over the same thickness is performed in the same step, the colored layer having a thickness almost equal to the design value is formed in the peripheral parting portion, while the black matrix is formed. In the part, the colored layer becomes thinner than designed. Therefore, the layer thickness of the entire color filter layer becomes smaller in the black matrix portion than in the peripheral parting portion.

When a black matrix is formed by laminating colored layers of three colors of RGB, the film thickness of the black matrix portion is the largest in the structure in the image display area. However, as described above, since the peripheral parting portion surrounding the image display area has a larger film thickness than the black matrix part, a difference occurs in the cell gap between the peripheral parting portion and the image display part inside thereof. . More specifically, since the cell gap in the image display area becomes smaller than that in the peripheral parting portion, display unevenness due to the nonuniformity of the cell gap is generated particularly in the area close to the peripheral parting portion in the image display area. Will occur.

The present invention has been made in view of the above points, and a liquid crystal panel capable of preventing display unevenness by ensuring the uniformity of cells in the peripheral parting portion and the image display portion inside thereof. It is an object of the present invention to provide a substrate for a substrate, a manufacturing method thereof, a liquid crystal device, and an electronic device.

[0008]

According to one aspect of the present invention, in a liquid crystal panel substrate, the substrate, a first light-shielding region that is disposed on the substrate and defines an outer edge of a display region, and A cell thickness adjusting layer disposed on the substrate in the display region; and a second light shielding region disposed on the cell thickness adjusting layer and defining boundaries of a plurality of pixel regions in the display region, The thickness of the cell thickness adjusting layer is determined such that the total thickness of the second light-shielding region does not become smaller than the total thickness of the first light-shielding region.

The above liquid crystal panel substrate is constructed by laminating a plurality of layers on a transparent substrate such as glass or plastic. A first light-shielding region that defines a display region when an image or the like is displayed as a liquid crystal display panel is arranged on the substrate. This first light shielding area is also called a peripheral parting or a frame. Further, in the display area, the cell thickness adjusting layer is provided on the substrate, and the second light shielding area that defines the boundaries of the plurality of pixel areas is provided thereon. The second light-shielding region defines the boundary between adjacent pixels,
Also called black matrix. Then, the cell thickness adjustment layer is determined so that the total thickness of the second light-shielding region does not become smaller than the total thickness of the first light-shielding region.

Since the second light-shielding region such as the black matrix is much thinner than the first light-shielding region such as the peripheral parting, each layer is formed to have a thickness as designed when a plurality of layers are stacked. This is difficult, and as a result, the second light-shielding region tends to have a smaller layer thickness than the design. Therefore, a cell thickness adjusting layer is provided to raise each layer in the second light-shielding region,
By making the total thickness equal to or larger than the total thickness of the first light shielding region, the cell gap is made uniform over the entire display region. As a result, it is possible to prevent display unevenness and the like caused by non-uniformity of the cell gap.

In one aspect of the liquid crystal panel substrate, it is preferable that the cell thickness adjusting layer is made of a transparent resin. When the present invention is applied to a semi-transmissive reflective liquid crystal panel, the cell thickness adjusting layer is also formed in the transmissive region, and therefore the cell thickness adjusting layer is made of a transparent resin to allow the transmitted light to pass therethrough. It is necessary to form.

In another aspect of the above-described liquid crystal panel substrate, the first light-shielding region includes a superposition of colored layers of red, blue, and green and an overcoat layer, and the second light-shielding region is Including overlapping of colored layers of red, blue, and green and overcoat layers, the red, blue, and green colored layers and overcoat layers included in the first light-shielding region and the second light-shielding region are respectively It can be composed of the same material. This makes it possible to form the corresponding layers of the first light-shielding region and the second light-shielding region by the same method,
The efficiency of the manufacturing process can be improved.

In still another mode of the above-mentioned liquid crystal panel substrate, the thickness of the cell thickness adjusting layer is such that the entire thickness of the second light-shielding region is the respective colors included in the first light-shielding region. The total thickness of the colored layer and the overcoat layer can be determined to be not less than the total. Accordingly, the thickness of the cell thickness adjustment layer can be determined based on the layer thickness of each layer in the first light shielding region.

In one embodiment of the above liquid crystal panel substrate, the second light-shielding region further includes a color filter layer, and layers of colored layers of respective colors in the first light-shielding region and the second light-shielding region. When the thickness is m, the layer thickness of the overcoat layer in the first light-shielding region and the second light-shielding region is n, and the layer thickness of the color filter layer in the second light-shielding region is s, the cell thickness adjusting layer The thickness T of
Formula: T = (3m + n)-(s + 2m + n / 2).

In still another mode of the above liquid crystal panel substrate, the cell thickness adjusting layer is preferably formed of the same transparent resin as the overcoat layer. Thereby, the cell thickness adjusting layer and the overcoat layer can be formed using the same manufacturing apparatus and material, and the efficiency of the manufacturing process can be improved.

It is possible to construct a liquid crystal display panel including the above-mentioned liquid crystal panel substrate, and to construct an electronic device further including the liquid crystal display panel as a display section.

According to another aspect of the present invention, in a method for manufacturing a liquid crystal panel substrate, a first step of forming a first light-shielding region that defines an outer edge of a display region on the substrate, and in the display region, A second step of forming a cell thickness adjusting layer on the substrate, and a third step of forming a second light shielding area on the cell thickness adjusting layer that defines a boundary between a plurality of pixel areas in the display area. And the thickness of the cell thickness adjusting layer is determined such that the total thickness of the second light-shielding region is not smaller than the total thickness of the first light-shielding region.

The substrate for liquid crystal panel described above can be manufactured by the above manufacturing method.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will be described below with reference to the drawings.

[Liquid Crystal Display Panel] First, an embodiment of a liquid crystal display panel to which the present invention is applied will be described. Figure 1
FIG. 3 is a sectional view showing an example in which the present invention is applied to a transflective liquid crystal display panel.

In FIG. 1, the liquid crystal display panel 100 is
Substrate 101 and substrate 1 made of glass or plastic
No. 02 and No. 02 are bonded together via a sealing material 103, and a liquid crystal 104 is sealed inside. A retardation plate 105 and a polarizing plate 106 are sequentially arranged on the outer surface of the substrate 102, and a retardation plate 107 and a polarizing plate 108 are sequentially arranged on the outer surface of the substrate 101. A backlight 109 that emits illumination light when performing transmissive display is disposed below the polarizing plate 108.

The substrate 101 constitutes the color filter substrate 10. A transparent resin scattering layer 113 is formed on the substrate 101 by using, for example, acrylic resin. For the resin scattering layer 113, a translucent resin layer made of, for example, acrylic resin is formed on the surface of a substrate such as glass or plastic,
It can be manufactured by forming a large number of fine concavo-convex structures on its surface.

A reflective layer 111 made of an aluminum alloy, a silver alloy, or the like is partially formed on the resin scattering layer 113. The area where the reflective layer 111 is formed is an area used for reflective display (hereinafter, also referred to as “reflective area”).
Is. As a result, the surface of the reflective layer 111 has an uneven shape that reflects the uneven structure of the resin scattering 113 layer. Therefore, when performing a reflective display using external light, the external light is reflected in a state of being appropriately scattered due to the uneven shape, so that the reflected light can be made uniform and a wide viewing angle can be secured. Becomes

Openings 117 are formed in the reflective layer 111 at predetermined intervals (see FIG. 2). That is, the reflective layer 111 is not formed in the portion of the opening 117, and the region of the opening 117 becomes the transmissive region. The area where the reflective layer 111 is formed, that is, the area other than the opening 117 is the reflective area.

A cell thickness adjusting layer 115 made of a photosensitive acrylic resin or the like is formed on the reflective layer 111 in the reflective region and on the resin scattering layer 113 in the transmissive region.
The cell thickness adjusting layer 115 serves to adjust the cell thickness between the peripheral parting region and the image display region by raising the bottom of the color filter layer formed thereon. The suitable thickness of the cell thickness adjusting layer 115 will be described later.

In the reflection area, the reflection color filter portion 120R of each color is formed on the cell thickness adjusting layer 115.
Is formed. On the other hand, in the transmissive region, the transmissive color filter unit 1 for each color is similarly formed on the cell thickness adjusting layer 115.
20T is formed. The reason why the reflective color filter 120R and the transmissive color filter 120T are formed separately is that the display colors during transmissive display and reflective display can be adjusted individually.

In FIG. 1, RG is used for convenience of illustration.
A color filter for each color B is used as a reflection color filter 120.
Although shown by the R and transmission color filters 120T, both the reflection color filter 120R and the transmission color filter 120T are actually shown in FIG.
It is composed of three colored layers of RGB. That is, the reflection color filter 120R is the red (R) colored layer 120.
It is configured by sequentially arranging the RR, the green (G) colored layer 120RG, and the blue (B) colored layer 120RB. Similarly, the transmission color filter 120T is configured by sequentially arranging a red (R) colored layer 120TR, a green (G) colored layer 120TG, and a blue (B) colored layer 120TB.

Reflective color filter section 120T for each color
R, 120TG and 120TB, and transmission color filter sections 120RR, 120RG and 120RB for each color
A black matrix 120B (see FIG. 2) at the boundary of
Is formed. As shown in FIG. 1, the black matrix 120B is formed by superposing colored layers of the three RGB colors forming the transmission color filter 120T. The reason why the RGB color layers of the transmissive color filter are used instead of the reflective color filter is that the transmissive color filter is generally designed to have a higher color density than the reflective color filter. This is because the superposition can form a black matrix having a higher density and a good light-shielding property.

Then, the reflection color filter section 120R
An overcoat layer 127 is formed so as to cover the transmission color filter portion 120T. The overcoat layer 127 is for protecting the color filters 120R and 120T from corrosion and contamination by chemicals during the manufacturing process of the liquid crystal display panel. The liquid crystal display panel 100 of FIG. 1 employs a so-called multi-gap structure. The multi-gap structure is a display performance in both the transmissive display mode and the reflective display mode by optimizing the cell thickness by making the thickness of the overcoat layer 127 formed in the transmissive region and the reflective region different. Is a method of improving.

Further, a transparent electrode 114 made of a transparent conductor such as ITO (indium tin oxide) is formed on the surface of the overcoat layer 127. In the present embodiment, the transparent electrodes 114 are formed in a plurality of parallel stripes. Further, the transparent electrode 114 extends in a direction orthogonal to the transparent electrode 121 similarly formed in a stripe shape on the substrate 102, and is included in the intersection region of the transparent electrode 114 and the transparent electrode 121. 100 constituent parts (reflection layer 111, color filter 1
20, transparent electrode 114, liquid crystal 104 and transparent electrode 121
The portion within the crossing area in) constitutes a pixel.

On the transparent electrode 114 on the substrate 101,
Further, an alignment film or the like is formed on the transparent electrode 121 on the substrate 102 as needed.

In the liquid crystal display panel 100, when the reflection type display is performed, the external light incident on the area where the reflection layer 111 is formed travels along the path R shown in FIG. 1 and is reflected. It is reflected by the layer 111 and visually recognized by the observer E. On the other hand, when a transmissive display is made,
The illumination light emitted from the backlight 109 travels along the path T shown in FIG. 1 and is visually recognized by an observer E.

In the present invention, the arrangement of each color layer of the color filter is not limited to the arrangement shown in FIG. That is, it is possible to form various arrays such as a stripe array, a delta array, and a diagonal array. Further, in the above embodiment, the transmission color filter and the reflection color filter are independently formed of different materials, but it is also possible to form them as a single color filter by the same material. Further, in that case, it is also applicable to a type of color filter in which the thickness of the color filter is changed between the transmissive region and the reflective region.

[Cell Thickness Adjustment Layer] Next, the cell thickness adjustment layer, which is a feature of the present invention, will be described in detail. Figure 3
(A) is an enlarged view of a broken line portion 130 in FIG. 1. As shown in FIG. 3A, the resin scattering layer 113 is formed on the substrate 101, and the reflection layer 111 is formed on the resin scattering layer 113 in the reflection region.

In the image display area, the resin scattering layer 11
3 and the reflection layer 111, the cell thickness adjusting layer 115 is formed, and the transmission color filter 120T and the reflection color filter 120R are formed thereon. Then, the black matrix 120B is formed on the reflection color filter 120R by overlapping the colored layers (120BB, 120BR, 120BG) of RGB three colors. On the other hand, in the peripheral parting region, R is formed on the reflective layer 111.
A peripheral parting line 123 is formed by superimposing the colored layers 123B, 123, and 123G of three GB colors.

An overcoat layer 127 is formed so as to cover the peripheral parting region and the image display region, and a transparent electrode 114 is further formed in each pixel region in the image display region.

As can be seen from FIG. 3A, in the present invention, since the cell thickness adjusting layer 115 is provided, the peripheral partition 1
The height H1 of the portion 23 (to be precise, the height of the overcoat layer 127 covering the peripheral parting 123) and the highest point in the image display area, that is, the height H2 of the portion of the black matrix 120B (to be precise, the black matrix). (The height of the overcoat layer 127 that covers 120B) is substantially the same. Thereby, the cell gaps of the peripheral parting region and the image display region can be made substantially the same.

FIG. 3B shows a comparison with the present invention.
An example of a color filter substrate without a cell thickness adjusting layer will be shown. The example of FIG. 3B is the same as the laminated structure shown in FIG. 3A except that the cell thickness adjusting layer 115 is not provided.
That is, the reflective color filter 120R is formed immediately above the reflective layer 111 in the reflective region, and the transmissive color filter 120T is formed immediately above the resin scattering layer 113 in the transmissive region.

When the cell thickness adjusting layer is not provided, as shown in FIG.
As is clear from (b), the height H2 of the portion of the black matrix 120B in the image display area becomes lower than the height H1 of the highest point of the peripheral parting area.

As a measure against the problem that the height of the image display area becomes lower than the height of the peripheral parting area as shown in FIG. 3B, the peripheral parting 123 is configured in FIG. 3B. A method of omitting the green colored layer 123G has also been devised. The reason why the green color layer of the three RGB colors is omitted is that if one of the three RGB colors is omitted, then omitting the green color has the least effect, considering the spectral characteristics of the color filter. This is because, for the time being, it is possible to obtain a light-shielding property to the extent that it can function as a peripheral parting line. However, the green colored layer 123G
Even if is omitted, it is still difficult to make the height of the image display area and the height of the peripheral parting area substantially coincide with each other, although the difference in height becomes small.

Spherical spacers (not shown) are dispersed in the area for enclosing the liquid crystal 104 shown in FIG. The dispersed spacers are supported by the highest point of the color filter substrate 10 and have a role of making the cell gap, which is the distance between the substrates 101 and 102, uniform. However, substrates 101 and 102
Since the spacers dispersed between the two have the same diameter, when the height of the highest point of the color filter substrate 10 is different between the peripheral parting region and the image display region as shown in FIG.
The spacer is more likely to be insufficiently supported by the color filter in the image display area than in the peripheral parting area. As a result, a phenomenon occurs in which the cell gap is smaller in the image display area than in the peripheral parting area. That is, when the liquid crystal display panel 100 is viewed from the lateral direction, the central portion corresponding to the image display area is slightly recessed as compared with the peripheral portion corresponding to the peripheral parting area, and the cell gap is formed in the image display area. Unevenness occurs due to the non-uniformity. In view of this point, in the present invention, the cell thickness adjusting layer 115 is formed so that the height of the highest point H2 of the image display area and the height of the highest point H1 of the peripheral parting area are substantially the same, and the display caused by the nonuniformity of the cell gap is shown. Prevents unevenness.

Even when the cell gap of the image display area and the cell gap of the peripheral parting area do not match, the cell gap of the image display area is smaller than the cell gap of the peripheral parting area (the case of FIG. 3B). , If the cell gap of the image display area is slightly larger than the cell gap of the peripheral parting area (that is, when the liquid crystal display panel is viewed laterally, the center is slightly bulged) It has been empirically known that it is unlikely to occur and the display quality of the image is high. Therefore, basically, the cell thickness is set so that the cell gap of the image display area does not become smaller than the cell gap of the peripheral parting area, that is, the highest point H2 of the image display area does not become lower than the highest point H1 of the peripheral parting area. It is preferable to determine the thickness of the adjustment layer 115. Of course, it is most desirable to determine the thickness of the cell thickness adjusting layer 115 so that the two match.

Next, the thickness of the cell thickness adjusting layer 115 will be examined. Now, it is assumed that the cell thickness adjusting layer is not provided as shown in FIG. At the position of the peripheral parting line 123 and the position of the black matrix 120B in the image display area, comparing the laminated structures, the substrate 101 and the resin scattering layer 1 are compared.
13 and the reflective layer 111 have the same structure, and basically no difference in height occurs.

A laminated structure at the position of the peripheral partition 123 and the position of the black matrix 120B in the image display area,
The layer thickness of each layer is shown in FIG. 4 (a) and FIG. 4 (b), respectively. The laminated structure of the peripheral parting position is the colored layer 123B, the colored layer 123R, the colored layer 123G, and the overcoat layer 127 from the bottom, and the three colored layers 123B to 123B.
The designed thickness of G is m (for example, 1 μm), and the designed thickness of the overcoat layer 127 is n (for example, 2 μm). In this case, when each layer is actually formed according to the designed layer thickness, each layer is formed to have substantially the designed thickness as shown in FIG.

On the other hand, the laminated structure at the position of the black matrix 120B in the image display area is, as shown in FIGS. 3 (b) and 4 (b), the reflection color filter layer 120R, the coloring layer 120BB, and the coloring layer from the bottom. 120BR, colored layer 120BG, and overcoat layer 127. The design thickness of each layer is such that the reflective color filter layer 120 is s
(For example, 1 μm), each colored layer 120BB, 120BR, and 120BG forming the black matrix 120B is m (for example, 1 μm), and the overcoat layer 127 is n (for example, 2 μm). In this case, when each layer is actually formed according to the designed layer thickness, the layers above the third layer are not formed to have the designed layer thickness as shown in FIG. The layer thickness is about ½ of the upper layer thickness.

This phenomenon is caused by the black matrix 120B.
Due to the small width of. FIG. 3B shows an example of the widths of the peripheral partition 123 and the black matrix 120B. The peripheral partition 123 has a width W1 of about 3 to 4 mm, while the black matrix 120B has a width W2.
Is about 10 to 12 μm. Therefore, the peripheral closure 1
Since the width of 23 is relatively large, each layer can be formed as designed, but since the width of the black matrix 120B is small, it becomes difficult to form each layer with the designed layer thickness as the layers are stacked (actually, in practice). It is considered that the laminated structure at the position of the black matrix is tapered as it goes to the upper layer when viewed in a cross section as shown in FIG.

Therefore, in consideration of the layer thickness actually formed at the position of the black matrix 120B, the cell adjustment layer 115.
The thickness of the layer may be determined. According to the example shown in FIG. 4, at the position of the black matrix 120B, each layer is formed only from about the third layer to the upper layer with a layer thickness of about ½ of the designed layer thickness. Therefore, the layer thickness of the cell thickness adjusting layer 115 should be determined on the assumption that each layer is actually formed with a layer thickness of 1/2 of the designed layer thickness from the third layer or the fourth layer to the upper layers. You can

In the example of FIG. 4, the total layer thickness T1 of the first to fourth layers actually formed at the position of the peripheral partition 123 is T1 = 3 m + n (about 5 μm). On the other hand, at the position of the black matrix 120B, the total layer thickness T2 of the first to fifth layers actually formed
Is T2 = s + m + 2 × m / 2 + n / 2 = s + 2m + n
/ 2 (about 4 μm). Therefore, in this example, the thickness T of the cell thickness adjusting layer 115 is given by T = T1-T2 = (3m + n)-(s + 2m + n / 2).

Therefore, in the example of FIG. 4, if the cell adjustment layer 115 having a thickness of about 1 μm is formed, the heights of the highest points of the peripheral partition and the black matrix are substantially the same. Thus, the cell thickness adjusting layer 1 having an appropriate thickness
By forming 15, the cell gap between the peripheral parting region and the image display region can be made uniform, and it is possible to prevent display quality deterioration such as display unevenness due to nonuniform cell gap.

[Manufacturing Method] Next, a manufacturing method of the above-described liquid crystal display panel 100 will be described. First, a method for manufacturing the color filter substrate 10 shown in FIG. 1 will be described with reference to FIGS. 1 and 3A.

First, the resin scattering layer 1 is formed on the surface of the substrate 101.
13 is formed. As a method of forming the resin scattering layer 113, as described above, a transparent resin layer is formed of, for example, an acrylic resin on the surface of a substrate such as glass or plastic, and a large number of fine concavo-convex structures are formed on the surface. It can be manufactured by The resin scattering layer 113
It is of course possible to adopt a method other than this as a method of forming the.

Next, aluminum, aluminum alloy,
A metal such as a silver alloy is formed into a thin film by a vapor deposition method, a sputtering method, or the like, and is patterned by a photolithography method to form the reflective layer 111. At this time, the reflective layer 111 is formed only in the reflective region.

Next, the cell thickness adjusting layer 115 is formed of a transparent photosensitive acrylic resin or the like. As can be seen from FIG. 3A, since the illumination light from the backlight 109 passes through the cell thickness adjusting layer when performing the transmissive display, the cell thickness adjusting layer 115 is made of a transparent material having a low wavelength dependence. Preferably. If the cell thickness adjusting layer 115 is formed using the same material as the overcoat layer 127, the manufacturing process can be simplified.

Next, a colored photosensitive resin (photosensitive resist) in which pigments or dyes exhibiting a predetermined hue are dispersed is applied, and exposure and development are performed in a predetermined pattern to perform patterning. On the cell thickness adjusting layer 115, in the transmissive region, the transmissive color filter 120T
And a color filter for reflection 120R is formed in the reflection area.

Next, the black matrix 120B is formed on the transmissive color filter 120R, and preferably, at the same time, the peripheral partition 123 is formed on the reflective layer 111 in the peripheral partition region. The peripheral partition 123 is formed of the same material as the colored layers of the RGB colors forming the black matrix 120. That is, the colored layer 123B of the peripheral partition 123 and the colored layer 120BB of the black matrix 120B are formed of the same material, and then the colored layer 123R of the peripheral partition 123 and the colored layer 120BR of the black matrix 120B are formed of the same material. ,
Furthermore, the colored layer 12 of the peripheral parting wall 123 is made of the same material.
3G and colored layer 120BG of black matrix 120B
To form.

Next, an overcoat layer 127 is formed of acrylic resin or the like on the entire area including the peripheral partition 123 and the black matrix 120B. Further, the transparent electrode 114 is formed in each pixel area in the image display area. In this way, the color filter substrate 10 is manufactured.

The colored layers 123B to 123R and the black matrix 120 at the position of the peripheral parting line 123.
Although the colored layers 120BB to 120BG of B, the overcoat layer 127 at the position of the peripheral parting line 123, and the overcoat layer 127 at the position of the black matrix 120B are formed to have the same layer thickness by design, As described above, although each layer is formed on the peripheral parting line 123 almost as designed, each layer is not formed on the black matrix 120B as designed.
However, in the present invention, by providing the cell thickness adjusting layer 115, each layer at the position of the black matrix 120B is raised so that the layer thickness at the peripheral parting position is substantially the same.

Next, the color filter 1 thus obtained
A method of manufacturing the liquid crystal display panel 100 shown in FIG. 1 using 0 will be described with reference to FIG. FIG. 5 is a flowchart showing the manufacturing process of the display panel 100.

First, the cell thickness adjusting layer 1 is formed by the above method.
Substrate 10 on which color filter 10 having 15 is formed
1 is manufactured (step S1), and the overcoat layer 1 is further manufactured.
27 is coated with a transparent conductor by a sputtering method,
The transparent electrode 114 is formed by patterning by the photolithography method (step S2). After that, an alignment film made of polyimide resin or the like is formed on the transparent electrode 114, and a rubbing process or the like is performed (step S3).

On the other hand, the substrate 102 on the opposite side is manufactured (step S4), and the transparent electrode 121 is formed by the same method (step S4).
5) Further, an alignment film is further formed on the transparent electrode 121, and rubbing treatment is performed (step S6).

Then, the substrate 101 and the substrate 102 are attached to each other via the sealing material 103 to form a panel structure (step S7). The substrate 101 and the substrate 102 are attached to each other by a spacer or the like (not shown) dispersedly arranged between the substrates so as to have a substantially defined substrate interval.

Then, the liquid crystal 104 is injected from the opening (not shown) of the sealing material 103, and the opening of the sealing material 103 is sealed with a sealing material such as an ultraviolet curable resin (step S8). After the main panel structure is completed in this way, the above-mentioned retardation plate, polarizing plate, etc. are attached to the outer surface of the panel structure by a method such as sticking, if necessary (Step S
9), the liquid crystal display panel 100 shown in FIG. 1 is completed.

[Electronic Equipment] Next, examples of electronic equipment to which the liquid crystal display panel according to the present invention can be applied will be described with reference to FIG.

First, an example in which the liquid crystal display panel according to the present invention is applied to the display portion of a portable personal computer (so-called notebook personal computer) will be described. Figure 6
FIG. 3A is a perspective view showing the configuration of this personal computer. As shown in the figure, the personal computer 41 includes a main body 412 having a keyboard 411,
And a display portion 413 to which the liquid crystal display panel according to the present invention is applied.

Subsequently, the liquid crystal display panel according to the present invention is
An example applied to the display unit of a mobile phone will be described. FIG. 6B is a perspective view showing the configuration of this mobile phone. As shown in the figure, the mobile phone 42 includes a plurality of operation buttons 421, an earpiece 422, a mouthpiece 423, and a display unit 4 to which the liquid crystal display panel according to the present invention is applied.
24 are provided.

As electronic equipment to which the liquid crystal display panel according to the present invention can be applied, in addition to the personal computer shown in FIG. 6A and the mobile phone shown in FIG. 6B, a liquid crystal television, A viewfinder type / monitor direct-viewing type video tape recorder, a car navigation device, a pager, an electronic notebook, a calculator, a word processor, a workstation, a videophone, a POS terminal, a digital still camera and the like can be mentioned.

[Modification] The above-mentioned color filter substrate and liquid crystal display panel are not limited to the above-mentioned examples, and various modifications can be made without departing from the scope of the present invention. Of course.

In the above embodiment, the liquid crystal display panel adopting a so-called multi-gap structure in which the layer thickness of the overcoat layer is different in the transmissive region and the reflective region is illustrated, but the transmissive region and the reflective region are overcoated. The present invention can be applied to a liquid crystal display panel having a structure in which a coat layer is uniformly formed.

The color filter shown in FIG. 2 has a structure that defines the transmissive area as an opening in the reflective area.
This structure is merely an example, and a structure in which rectangular reflection color filter portions and transmission color filter portions are alternately adjacent to each other may be formed.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a structure of a liquid crystal display panel according to an embodiment of the present invention.

FIG. 2 is a plan view showing a color filter structure used in the liquid crystal display panel shown in FIG.

3 is an enlarged cross-sectional view of a part of the liquid crystal display panel shown in FIG. 1 and a cross-sectional view showing a structure of the liquid crystal display panel when a cell thickness adjusting portion is not provided as a comparative example.

FIG. 4 is a table showing numerically a laminated structure of a peripheral parting position and a black matrix position in an image display area in the embodiment of the present invention.

FIG. 5 is a process drawing of the manufacturing method of the liquid crystal display panel according to the embodiment of the present invention.

FIG. 6 is a diagram showing an example of an electronic device to which the liquid crystal display panel according to the embodiment of the invention is applied.

[Explanation of symbols]

10 color filters 100 LCD display panel 101, 102 substrate 103 sealant 109 backlight 111 reflective layer 113 Resin scattering layer 114 transparent electrode 115 Cell thickness adjustment layer 120T, 120R color filter layer 120B black matrix 123 Peripheral closure 127 Overcoat layer

Continued front page    (72) Inventor Tomoyuki Nakano             Seiko, 3-3-3 Yamato, Suwa City, Nagano Prefecture             -In Epson Corporation F-term (reference) 2H042 AA06 AA09 AA26                 2H048 BA02 BA11 BA45 BB01 BB02                       BB07 BB10 BB24 BB28 BB42                 2H089 NA19 NA37 NA58 QA16 TA01                       TA02 TA04 TA12 TA14 TA15                       TA17 TA18                 2H090 JB02 JB03 LA01 LA03 LA06                       LA09 LA15 LA16 LA20                 2H091 FA02Y FA07X FA07Z FA11X                       FA11Z FA14Y FA35Y FA41Z                       FD01 GA01 GA03 GA06 GA09                       LA30

Claims (14)

[Claims] 1. A substrate and a first substrate disposed on the substrate and defining an outer edge of a display area.
A light shielding region, a cell thickness adjusting layer disposed on the substrate in the display region, and a second light shielding disposed on the cell thickness adjusting layer and defining boundaries of a plurality of pixel regions in the display region. A region, and the thickness of the cell thickness adjusting layer is determined such that the total thickness of the second light shielding region is not smaller than the total thickness of the first light shielding region. Substrate for liquid crystal panel. 2. The substrate for a liquid crystal panel according to claim 1, wherein the cell thickness adjusting layer is made of a transparent resin. 3. The first light-shielding region includes a superposition of colored layers of red, blue and green colors and an overcoat layer, and the second light-shielding region includes colored layers of red, blue and green colors. Including overlapping of overcoat layers, the red, blue, and green colored layers and the overcoat layers included in the first light-shielding region and the second light-shielding region are made of the same material. The liquid crystal panel substrate according to claim 1 or 2. 4. The thickness of the cell thickness adjusting layer is such that the entire thickness of the second light-shielding region is the layer thickness of the colored layer of each color and the layer of the overcoat layer included in the first light-shielding region. The substrate for liquid crystal panel according to claim 3, wherein the thickness is determined to be equal to or larger than the total thickness. 5. The second light-shielding region further includes a color filter layer, the layer thickness of the colored layer of each color in the first light-shielding region and the second light-shielding region is m, the first light-shielding region and the When the layer thickness of the overcoat layer in the second light-shielding region is n and the layer thickness of the color filter layer in the second light-shielding region is s, the thickness T of the cell thickness adjusting layer is T.
Is given by the formula: T = (3m + n)-(s + 2m + n / 2). 4. The liquid crystal panel substrate according to claim 3, wherein 6. The liquid crystal panel substrate according to claim 3, wherein the cell thickness adjusting layer is formed of the same transparent resin as the overcoat layer. 7. A liquid crystal display panel including the liquid crystal panel substrate according to claim 1. Description: 8. An electronic device comprising the liquid crystal display panel according to claim 7 as a display section. 9. A first step of forming a first light-shielding region that defines an outer edge of a display region on a substrate, and a second step of forming a cell thickness adjusting layer on the substrate in the display region. A third step of forming, on the cell thickness adjustment layer, a second light-shielding region that defines boundaries of a plurality of pixel regions in the display region, and the thickness of the cell thickness adjustment layer is The method for manufacturing a substrate for a liquid crystal panel, wherein the thickness of the entire second light-shielding region is determined so as not to be smaller than the thickness of the entire first light-shielding region. 10. The method for manufacturing a liquid crystal panel substrate according to claim 9, wherein in the second step, the cell thickness adjusting layer is made of a transparent resin. 11. The first step forms the first light-shielding region by sequentially stacking colored layers of red, blue, and green and an overcoat layer, and the third step includes red and blue. Forming a second light-shielding region by sequentially stacking a colored layer of each color of green, and an overcoat layer, wherein the first step and the second step include the first light-shielding area and the second light-shielding area. The method for manufacturing a liquid crystal panel substrate according to claim 9 or 10, wherein the red, blue, and green colored layers and the overcoat layer included in the regions are formed of the same material. 12. The thickness of the cell thickness adjusting layer is the second thickness.
The total thickness of the light-shielding regions is determined so as to be equal to or more than the total of the layer thicknesses of the colored layers of the respective colors and the layer thicknesses of the overcoat layers included in the first light-shielding region. 11. The method for manufacturing a liquid crystal panel substrate according to item 11. 13. In the third step, a color filter layer is formed on the cell thickness adjusting layer before forming the colored layers of the respective colors, and a color filter layer is formed in the first light-shielding region and the second light-shielding region. The layer thickness of the colored layer of each color is m, the layer thickness of the overcoat layer in the first light shielding region and the second light shielding region is n, and the layer thickness of the color filter layer in the second light shielding region is s.
Then, the thickness T of the cell thickness adjusting layer is given by the formula: T = (3m + n)-(s + 2m + n / 2). 14. The method of manufacturing a liquid crystal panel substrate according to claim 11, wherein the cell thickness adjusting layer is formed of the same transparent resin as the overcoat layer.