JP2001281648A - Semi-transmission type liquid crystal display panel and method for manufacturing the same - Google Patents
Semi-transmission type liquid crystal display panel and method for manufacturing the sameInfo
- Publication number
- JP2001281648A JP2001281648A JP2000098919A JP2000098919A JP2001281648A JP 2001281648 A JP2001281648 A JP 2001281648A JP 2000098919 A JP2000098919 A JP 2000098919A JP 2000098919 A JP2000098919 A JP 2000098919A JP 2001281648 A JP2001281648 A JP 2001281648A
- Authority
- JP
- Japan
- Prior art keywords
- color filter
- filter layer
- liquid crystal
- region
- color
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- G02F1/133553—Reflecting elements
- G02F1/133555—Transflectors
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/201—Filters in the form of arrays
-
- 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
- G02F1/133514—Colour filters
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、半透過型液晶表示
パネルおよびこれの製造方法に係り、特に、液晶セルの
内面における１ドット内に、反射膜を配置してその反射
膜上にカラーフィルタ層を形成してなる反射領域と、反
射膜を配置せずにカラーフィルタ層を形成してなる透過
領域とを有する半透過型液晶表示パネルおよびこれの製
造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transflective liquid crystal display panel and a method of manufacturing the same, and more particularly, to a method for fabricating a transflective liquid crystal display panel. The present invention relates to a transflective liquid crystal display panel having a reflection region formed with a layer and a transmission region formed with a color filter layer without disposing a reflection film, and a method for manufacturing the same.
【０００２】[0002]
【従来の技術】従来から、携帯電話等の文字画像表示画
面として半透過型の液晶表示パネルが用いられている。
前記半透過型液晶表示パネルの一例として、図４に示す
ように、液晶セル内面における１ドット内に、反射膜２
を配置してその反射膜２上にカラーフィルタ層１３を形
成してなる反射領域４と、反射膜２を配置せずにカラー
フィルタ層１３を形成してなる透過領域５とを有するも
のがある。ここで、１ドット内とは、カラー画像を形成
する１画素表示中における赤、緑、青の各１色単位の範
囲をいう。2. Description of the Related Art Conventionally, a transflective liquid crystal display panel has been used as a character image display screen of a cellular phone or the like.
As an example of the transflective liquid crystal display panel, as shown in FIG.
And a transmissive region 5 in which the color filter layer 13 is formed without disposing the reflective film 2. . Here, "within one dot" means a range of one color unit of each of red, green, and blue in one pixel display for forming a color image.
【０００３】そして、このような半透過型液晶表示パネ
ルには、反射膜２の背面側にバックライトユニットが設
けられており、外光が十分入射される場合には外光を反
射膜２で反射させてその反射光によりカラー画像を表示
するとともに、外光が入射されにくい場合等にはバック
ライトユニットからの照射光を透過領域５のカラーフィ
ルタ層１３で透過させてカラー画像表示するようになっ
ている。[0003] In such a transflective liquid crystal display panel, a backlight unit is provided on the back side of the reflective film 2, and when external light is sufficiently incident, the external light is reflected by the reflective film 2. When a color image is displayed by the reflected light and the external light is difficult to enter, the light emitted from the backlight unit is transmitted through the color filter layer 13 of the transmission area 5 to display a color image. Has become.
【０００４】また、そのようなカラー画像表示に必要な
反射膜２およびカラーフィルタ層１３を形成するため
に、従来から用いられている一般的な半透過型液晶表示
パネルの製造方法を図５に示す。FIG. 5 shows a conventional method of manufacturing a conventional transflective liquid crystal display panel for forming the reflective film 2 and the color filter layer 13 necessary for such a color image display. Show.
【０００５】従来の半透過型液晶表示パネルの製造方法
は、ガラスやプラスチック材料からなる１対の透明基板
１，１の一方の透明基板１上の全面に蒸着法など反射膜
２を形成し、その後フォトリソ法により反射膜２をパタ
ーニング形成することにより、１ドット内に反射膜２が
配置された反射領域４と反射膜２が配置されていない透
過領域５とを形成する。In a conventional method of manufacturing a transflective liquid crystal display panel, a reflective film 2 is formed on the entire surface of one of a pair of transparent substrates 1 and 1 made of glass or plastic material, for example, by a vapor deposition method. After that, the reflection film 2 is patterned and formed by the photolithography method, thereby forming the reflection region 4 in which the reflection film 2 is disposed in one dot and the transmission region 5 in which the reflection film 2 is not disposed within one dot.
【０００６】そして、前記反射領域４の反射膜２の上面
および反射膜２が形成されていない透明基板１の上面に
重ねるようにして顔料分散法等により、感光性着色材料
の塗布、露光、現像を繰り返して、赤、緑および青の各
カラーフィルタ層１３を形成するようになっていた。こ
のときの反射領域４のカラーフィルタ層１３と、透過領
域５のカラーフィルタ層１３とは、同一の厚さであって
同一の色純度を有するものが形成されるようになってい
た。そして、前記カラーフィルタ層１３の上にはカラー
フィルタ層１３の保護および平滑化のための保護膜６を
形成するようになっていた。Then, a photosensitive coloring material is coated, exposed, and developed by a pigment dispersion method or the like so as to overlap the upper surface of the reflective film 2 in the reflective area 4 and the upper surface of the transparent substrate 1 on which the reflective film 2 is not formed. Is repeated to form each of the red, green and blue color filter layers 13. At this time, the color filter layer 13 in the reflection region 4 and the color filter layer 13 in the transmission region 5 had the same thickness and the same color purity. Then, on the color filter layer 13, a protective film 6 for protecting and smoothing the color filter layer 13 is formed.
【０００７】その後、図示しないが、保護膜６上に透明
電極を形成するとともに、もう一方の透明基板１にも所
定の透明電極を形成し、それぞれ配向制御膜を形成して
からそれら２枚の透明電極基板をシール材を介して貼り
合わせ、液晶注入口から液晶セル内に液晶７を注入する
ことにより半透過型液晶表示パネルを完成させるように
なっていた。After that, although not shown, a transparent electrode is formed on the protective film 6 and a predetermined transparent electrode is also formed on the other transparent substrate 1 to form an alignment control film. A transflective liquid crystal display panel is completed by bonding a transparent electrode substrate via a sealing material and injecting a liquid crystal 7 into a liquid crystal cell from a liquid crystal injection port.
【０００８】[0008]
【発明が解決しようとする課題】しかしながら、従来の
半透過型液晶表示パネルにおいては、反射領域４では入
射光がカラーフィルタ層１３を通過して反射膜２で反射
された後に再びカラーフィルタ層１３を通過するためカ
ラーフィルタ層１３を２度通過することになるが、透過
領域５ではバックライトからの光がカラーフィルタ層１
３を１度通過するだけなので、反射領域４の光に比べて
透過領域５の光の色特性が劣ってしまい、透過時のカラ
ー画像の見栄えが淡い色になってしまうという問題があ
った。However, in the conventional transflective type liquid crystal display panel, in the reflection area 4, after the incident light passes through the color filter layer 13 and is reflected by the reflection film 2, the color filter layer 13 is again turned on. Pass through the color filter layer 13 twice, but in the transmissive area 5, light from the backlight is
3 only once, the color characteristics of the light in the transmissive area 5 are inferior to the light in the reflective area 4, and the color image at the time of transmission becomes pale in appearance.
【０００９】これは、表２に示す色度の測定結果から見
ても、従来の半透過型液晶表示パネルでは、反射領域４
における光の色度と透過領域５における光の色度との差
が大きくなっており、異なる色味を呈していることがわ
かる。[0010] This is because the conventional transflective liquid crystal display panel has a reflection region 4 in the chromaticity measurement results shown in Table 2.
The difference between the chromaticity of light in the transmission region 5 and the chromaticity of light in the transmission region 5 is large, and it can be seen that different colors are exhibited.
【００１０】[0010]
【表２】 [Table 2]
【００１１】そのため、透過時の色味を重視して色純度
の高いカラーフィルタ層１３を形成することも考えられ
るが、そのカラーフィルタ層１３を２度通過する反射領
域４の光が暗くなってしまうという別の問題が生じてし
まう。For this reason, it is conceivable to form the color filter layer 13 having high color purity with emphasis on the color at the time of transmission, but the light of the reflection region 4 which passes through the color filter layer twice becomes dark. Another problem arises.
【００１２】さらに、従来の半透過型液晶表示パネルで
は、反射領域４の液晶層ギャップが透過領域５に比べて
その反射膜２の膜厚分だけ薄くなっているため、光学的
に問題が生じる可能性があった。特に反射膜２の膜厚が
厚い場合にはその影響が顕著となるおそれがあった。Further, in the conventional transflective liquid crystal display panel, the liquid crystal layer gap in the reflective area 4 is smaller than the transmissive area 5 by the thickness of the reflective film 2, so that an optical problem occurs. There was a possibility. In particular, when the thickness of the reflection film 2 is large, the influence may be remarkable.
【００１３】本発明はこのような問題点に鑑みてなされ
たもので、反射領域と透過領域との色特性を改善してい
ずれの領域を経て表示されるカラー画像の見栄えを一致
させることができるとともに、反射領域および透過領域
の液晶層ギャップを均一に保持することができる半透過
型液晶表示パネルおよびこれの製造方法を提供すること
を目的とする。The present invention has been made in view of such a problem, and it is possible to improve the color characteristics of a reflective area and a transmissive area to match the appearance of a color image displayed through any of the areas. It is another object of the present invention to provide a transflective liquid crystal display panel capable of uniformly maintaining a liquid crystal layer gap in a reflective region and a transmissive region, and a method for manufacturing the same.
【００１４】[0014]
【課題を解決するための手段】前述した目的を達成する
ため請求項１に係る発明の特徴は、透過領域のカラーフ
ィルタ層の厚さを反射領域のカラーフィルタ層の厚さよ
りも大きくした点にある。そして、このような構成を採
用したことにより、透過領域において光が透過するカラ
ーフィルタ層の距離が、反射領域において反射して光が
通過するカラーフィルタ層の距離に近くなるため、両領
域を経て表示されるカラー画像の色特性を近似させるこ
とができる。In order to achieve the above object, a feature of the invention according to claim 1 is that the thickness of the color filter layer in the transmission region is larger than the thickness of the color filter layer in the reflection region. is there. By adopting such a configuration, the distance of the color filter layer through which light is transmitted in the transmission region becomes closer to the distance of the color filter layer through which light is reflected and reflected by the reflection region. Color characteristics of a displayed color image can be approximated.
【００１５】また、請求項２に係る発明の特徴は、反射
領域で反射されてカラーフィルタ層を２度通過する光の
色特性と、透過領域のカラーフィルタ層を１度だけ通過
する光の色特性とが一致するように、前記反射領域およ
び前記透過領域のカラーフィルタ層をそれぞれ異なる色
純度に形成した点にある。そして、このような構成を採
用したことにより、例えば反射領域のカラーフィルタ層
の色特性を最適な状態に形成し、これに一致するように
透過領域のカラーフィルタ層の色純度を設定するため、
反射領域の光の色特性と透過領域の光の色特性とを確実
に一致させることができる。According to a second aspect of the present invention, the color characteristics of light reflected by the reflection area and passing through the color filter layer twice and the color of light passing through the color filter layer in the transmission area only once. The point is that the color filter layers of the reflection region and the transmission region are formed with different color purities so that the characteristics match. Then, by adopting such a configuration, for example, in order to form the color characteristics of the color filter layer in the reflection region in an optimal state and to set the color purity of the color filter layer in the transmission region to match this,
The color characteristics of light in the reflection region and the color characteristics of light in the transmission region can be reliably matched.
【００１６】また、請求項３に係る発明の特徴は、請求
項１または請求項２において、前記透過領域のカラーフ
ィルタ層の上面位置と、前記反射領域のカラーフィルタ
層の上面位置とが一致するように各カラーフィルタ層を
形成した点にある。そして、このような構成を採用した
ことにより、反射領域の光の色特性と透過領域の光の色
特性とを一致させることができるとともに、さらに反射
領域および透過領域の液晶層ギャップを均一に保持する
ことができる。According to a third aspect of the present invention, in the first or second aspect, the upper surface position of the color filter layer in the transmissive region matches the upper surface position of the color filter layer in the reflective region. That is, each color filter layer is formed as described above. By adopting such a configuration, the color characteristics of light in the reflection region and the color characteristics of light in the transmission region can be matched, and the gap between the liquid crystal layers in the reflection region and the transmission region can be kept uniform. can do.
【００１７】また、請求項４に係る発明の特徴は、反射
膜を形成した後に透過領域にのみ第１のカラーフィルタ
層を形成し、その後に前記反射膜および前記第１カラー
フィルタ層の上に第２のカラーフィルタ層を形成するよ
うにした点にある。そして、このような方法を採用した
ことにより、透過領域において光が透過するカラーフィ
ルタ層の距離が、反射領域において反射して光が通過す
るカラーフィルタ層の距離に、第１カラーフィルタ層の
厚さ分だけ近づけることができるため、両領域を経て表
示されるカラー画像の色特性を近似させることができ
る。A feature of the invention according to claim 4 is that a first color filter layer is formed only in the transmission region after forming the reflection film, and thereafter, the first color filter layer is formed on the reflection film and the first color filter layer. The point is that the second color filter layer is formed. By adopting such a method, the distance of the color filter layer through which light is transmitted in the transmission region is set to be equal to the distance of the color filter layer through which light is reflected and transmitted through the reflection region. Since the distances can be made closer to each other, the color characteristics of a color image displayed through both areas can be approximated.
【００１８】また、請求項５に係る発明の特徴は、反射
膜を形成した後に、その反射膜上の反射領域または反射
膜が形成されていない透過領域のいずれか一方にのみカ
ラーフィルタ層を形成し、その後に他方の領域にカラー
フィルタ層を形成するようにした点にある。そして、こ
のような方法を採用したことにより、反射領域および透
過領域におけるカラーフィルタ層をそれぞれ別個の過程
において形成するため、両領域での光の色特性が一致す
るようにカラーフィルタ層の厚さや色特性を適当に調整
することができる。A feature of the invention according to claim 5 is that, after forming the reflection film, the color filter layer is formed only on one of the reflection region on the reflection film and the transmission region on which the reflection film is not formed. After that, a color filter layer is formed in the other region. Then, by adopting such a method, the color filter layers in the reflection region and the transmission region are formed in separate processes, respectively, so that the thickness of the color filter layer and the thickness of the color filter layer are adjusted so that the color characteristics of light in both regions match. The color characteristics can be adjusted appropriately.
【００１９】[0019]
【発明の実施の形態】以下、本発明を図面に示す実施形
態により説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments shown in the drawings.
【００２０】図１は、本発明に係る半透過型液晶表示パ
ネルの実施形態の一例を示したもので、液晶セルの内面
における１ドット内において、透明基板１の上面に反射
膜２を配置してその反射膜２上にカラーフィルタ層３を
形成してなる反射領域４と、透明基板１の上面に反射膜
２を配置せずにカラーフィルタ層３を形成してなる透過
領域５とを有している。そして、本実施形態では、前記
透過領域５のカラーフィルタ層３の厚さが前記反射領域
４のカラーフィルタ層３の厚さよりも大きくなるように
形成されている。FIG. 1 shows an example of an embodiment of a transflective liquid crystal display panel according to the present invention. In one dot on the inner surface of a liquid crystal cell, a reflective film 2 is disposed on the upper surface of a transparent substrate 1. A reflective region 4 formed by forming a color filter layer 3 on the reflective film 2 and a transmissive region 5 formed by forming the color filter layer 3 without disposing the reflective film 2 on the upper surface of the transparent substrate 1. are doing. In the present embodiment, the thickness of the color filter layer 3 in the transmission area 5 is formed to be larger than the thickness of the color filter layer 3 in the reflection area 4.
【００２１】前記透過領域５のカラーフィルタ層３の厚
さは、反射領域４においてカラーフィルタ層３を２度通
過する光の色特性と、透過領域５においてカラーフィル
タ層３を１度通過する光の色特性とを少なくとも近似さ
せるように任意に設定される。例えば、カラーフィルタ
層３の色純度が等しい場合には、前記透過領域５のカラ
ーフィルタ層３の厚さを反射領域４のカラーフィルタ層
３の厚さの約２倍に形成すれば、両領域において光が通
過するカラーフィルタ層３の距離が等しくなり、それら
の光の色特性は一致する。The thickness of the color filter layer 3 in the transmission area 5 is determined by the color characteristics of light passing through the color filter layer 3 twice in the reflection area 4 and the light passing through the color filter layer 3 in the transmission area 5 once. Are set arbitrarily so as to at least approximate the color characteristics of. For example, when the color purity of the color filter layer 3 is equal, if the thickness of the color filter layer 3 in the transmissive area 5 is formed to be about twice the thickness of the color filter layer 3 in the reflective area 4, both areas can be formed. , The distance of the color filter layer 3 through which light passes becomes equal, and the color characteristics of those lights match.
【００２２】また、透過領域５のカラーフィルタ層３の
厚さを反射領域４のカラーフィルタ層３の厚さの２倍と
しなくても、透過領域５のカラーフィルタ層３の色純度
を調整することで透過領域５および反射領域４を通過す
る光の色特性を一致させることができる。例えば、透過
領域５において光が通過するカラーフィルタ層３の距離
が、反射領域４において光が通過するカラーフィルタ層
３の距離の２分の１である場合には、透過領域５のカラ
ーフィルタ層３を反射領域４のカラーフィルタ層３の２
倍の色純度に高めて形成すればよいし、逆に透過領域５
の光が通過するカラーフィルタ層３の距離が反射領域４
に比べて長い場合には、透過領域５のカラーフィルタ層
３の色純度を反射領域４のものに比べて低くすればよ
い。Further, the color purity of the color filter layer 3 in the transmission region 5 is adjusted without making the thickness of the color filter layer 3 in the transmission region 5 twice the thickness of the color filter layer 3 in the reflection region 4. Thus, the color characteristics of the light passing through the transmission region 5 and the reflection region 4 can be matched. For example, when the distance of the color filter layer 3 through which light passes in the transmission region 5 is 分 の of the distance of the color filter layer 3 through which light passes in the reflection region 4, the color filter layer of the transmission region 5 3 is the color filter layer 3 of the reflection area 4
It may be formed by increasing the color purity twice as much, and conversely, the transmission region 5
The distance of the color filter layer 3 through which the light of
When the length is longer than that of the reflection region 4, the color purity of the color filter layer 3 in the transmission region 5 may be lower than that in the reflection region 4.
【００２３】本実施形態においては、図１に示すよう
に、透過領域５のカラーフィルタ層３の上面位置と、反
射領域４のカラーフィルタ層３の上面位置とが一致する
ように形成されており、透過領域５および反射領域４に
おける光の色特性を一致させるだけでなく、透過領域５
および反射領域４の液晶層ギャップをも均一に保持させ
ている。これにより、透過領域５において光が通過する
カラーフィルタ層３の距離が、従来のものに比べて反射
膜２の膜厚分長くなっているため、その分だけ透過領域
５の光の色特性が、反射領域４の光の色特性に近似する
ことになる。もし、各領域での色特性の差が大きい場合
には、透過領域５のカラーフィルタ層３の色純度を反射
領域４に比べて高めるように調整すればよい。In the present embodiment, as shown in FIG. 1, the upper surface position of the color filter layer 3 in the transmission region 5 and the upper surface position of the color filter layer 3 in the reflection region 4 are formed so as to coincide with each other. In addition to matching the color characteristics of light in the transmission region 5 and the reflection region 4, the transmission region 5
Further, the gap of the liquid crystal layer in the reflection region 4 is also kept uniform. As a result, the distance of the color filter layer 3 through which light passes in the transmission region 5 is longer than that of the conventional color filter layer by the thickness of the reflection film 2, so that the color characteristics of light in the transmission region 5 are correspondingly increased. , The color characteristics of the light in the reflection area 4. If there is a large difference in color characteristics between the regions, the color purity of the color filter layer 3 in the transmission region 5 may be adjusted to be higher than that in the reflection region 4.
【００２４】ここで、本実施形態の半透過型液晶表示パ
ネルにおける透過領域５および反射領域４の色度特性の
測定を行った結果を表１に示す。この色度測定試験で
は、Ｃ光源を使用している。Table 1 shows the results of measuring the chromaticity characteristics of the transmissive area 5 and the reflective area 4 in the transflective liquid crystal display panel of the present embodiment. In this chromaticity measurement test, a C light source is used.
【００２５】[0025]
【表１】 [Table 1]
【００２６】表１に示すように、本実施形態の半透過型
液晶表示パネルでは、反射領域４および透過領域５にお
ける光の色特性の差がほとんどなくなり、ほぼ一致する
までに改善された。As shown in Table 1, in the transflective liquid crystal display panel of the present embodiment, the difference in the color characteristics of light in the reflection area 4 and the transmission area 5 is almost eliminated, and is improved until they substantially match.
【００２７】したがって、本実施形態によれば、透過領
域５におけるカラーフィルタ層３の厚さを厚くしたこと
により、透過領域５において光が１度だけ透過するカラ
ーフィルタ層３の距離が、反射領域４において反射して
光が２度通過するカラーフィルタ層３の距離に近くなる
ため、両領域を経て表示されるカラー画像の色特性を一
致させることができ、両領域を通過させて表示するカラ
ー画像の色味を改善して高品質のカラー画像を得ること
ができる。Therefore, according to the present embodiment, by increasing the thickness of the color filter layer 3 in the transmission region 5, the distance of the color filter layer 3 through which light is transmitted only once in the transmission region 5 is reduced. 4, the color is close to the distance of the color filter layer 3 through which the light passes twice, so that the color characteristics of the color image displayed through both areas can be matched, and the color displayed by passing through both areas can be matched. A high quality color image can be obtained by improving the tint of the image.
【００２８】この場合、透過領域５のカラーフィルタ層
３の厚さを、反射領域４のカラーフィルタ層３の厚さの
約２倍に形成すれば、両領域に形成するカラーフィルタ
層３の色純度として同一のものを用いても、色特性を一
致させることができる。In this case, if the thickness of the color filter layer 3 in the transmissive area 5 is formed to be about twice the thickness of the color filter layer 3 in the reflective area 4, the color of the color filter layer 3 formed in both areas can be improved. Even if the same purity is used, the color characteristics can be matched.
【００２９】また、透過領域５のカラーフィルタ層３の
色純度を適当に調整すれば、透過領域５と反射領域４と
において光が通過するカラーフィルタ層３の距離の差を
相殺することができ、特別に透過領域５のカラーフィル
タ層３の厚さを大きくし過ぎないようにできる。Further, by appropriately adjusting the color purity of the color filter layer 3 in the transmission region 5, the difference in the distance between the color filter layer 3 through which light passes in the transmission region 5 and the reflection region 4 can be offset. In particular, the thickness of the color filter layer 3 in the transmission region 5 can be prevented from being too large.
【００３０】さらに、透過領域５および反射領域４にお
けるカラーフィルタ層３の上面位置を一致させるように
すれば、反射領域４および透過領域５の液晶層ギャップ
を均一に保持することができる。Furthermore, if the upper surface positions of the color filter layer 3 in the transmission region 5 and the reflection region 4 are made to coincide with each other, the liquid crystal layer gap between the reflection region 4 and the transmission region 5 can be kept uniform.
【００３１】つぎに、本発明の半透過型液晶表示パネル
の製造方法の実施形態の一例について第１実施形態およ
び第２実施形態として説明する。Next, an example of an embodiment of a method of manufacturing a transflective liquid crystal display panel according to the present invention will be described as a first embodiment and a second embodiment.
【００３２】本第１実施形態の半透過型液晶表示パネル
の製造方法は、まず、透明基板１の上に反射膜２が配置
されている部分と配置されていない部分とを形成し、そ
れぞれ反射領域４と透過領域５とする。続いて反射膜２
が形成されていない透過領域５において第１のカラーフ
ィルタ層３ａを形成し、その後に前記反射膜２および前
記第１カラーフィルタ層３ａの上に第２のカラーフィル
タ層３ｂを形成する。前記第１カラーフィルタ層３ａと
第２カラーフィルタ層３ｂとの色純度は同じものを形成
してもよいし、異なるものを形成するようにしてもよ
い。In the method of manufacturing a transflective liquid crystal display panel according to the first embodiment, first, a portion where the reflection film 2 is disposed and a portion where the reflection film 2 is not disposed are formed on the transparent substrate 1, and each of the portions is formed by reflection. The region 4 and the transmission region 5 are assumed. Then, reflection film 2
The first color filter layer 3a is formed in the transmission region 5 where is not formed, and then the second color filter layer 3b is formed on the reflection film 2 and the first color filter layer 3a. The color purity of the first color filter layer 3a and the color purity of the second color filter layer 3b may be the same or different.
【００３３】このような第１実施形態の半透過型液晶表
示パネルの製造方法について、より具体的な実施例１を
図２を参照しつつ説明する。The method of manufacturing the transflective liquid crystal display panel according to the first embodiment will be described in more detail with reference to FIG.
【００３４】実施例１の半透過型液晶表示パネルの製造
方法は、まず、第１カラーフィルタ層３ａを色調整層と
して用いるため、あらかじめ着色材料の色調整を行って
おく。本実施形態では、反射領域４における反射膜２の
膜厚がカラーフィルタ層３ｂに比べて薄いため、第１カ
ラーフィルタ層３ａの色純度が高くなるように調整して
おく。そして、ガラス材料またはプラスチック材料から
なる透明基板１上の全面に蒸着法あるいはスパッタ法等
によりアルミ材料からなる反射膜２を０．２μｍの膜厚
に形成し、フォトリソ法によりパターニングして透過領
域５とする部分の反射膜２をエッチングする。これによ
り１ドット内に反射膜２を備えた反射領域４と反射膜２
を備えない透過領域５とを形成する。In the method of manufacturing a transflective liquid crystal display panel according to the first embodiment, first, the color of a coloring material is adjusted in advance in order to use the first color filter layer 3a as a color adjusting layer. In the present embodiment, since the thickness of the reflection film 2 in the reflection region 4 is smaller than that of the color filter layer 3b, the first color filter layer 3a is adjusted so as to have high color purity. Then, a reflective film 2 made of an aluminum material is formed to a thickness of 0.2 μm on the entire surface of a transparent substrate 1 made of a glass material or a plastic material by a vapor deposition method or a sputtering method, and is patterned by a photolithographic method to form a transmission region 5. The reflection film 2 in the portion to be formed is etched. Thus, the reflection area 4 having the reflection film 2 in one dot and the reflection film 2
And the transmission region 5 which does not include
【００３５】続いて、顔料分散法などにより、感光性着
色材料の塗布、露光、現像を繰り返し、透過領域５に
赤、緑、青の各色について第１カラーフィルタ層３ａを
前記反射膜２と同じ膜厚の０．２μｍで形成する。Subsequently, the application, exposure and development of the photosensitive coloring material are repeated by a pigment dispersion method or the like, and the first color filter layer 3a is formed in the transmission region 5 for each of red, green and blue in the same manner as the reflection film 2. It is formed with a thickness of 0.2 μm.
【００３６】続いて、前記反射膜２上の反射領域４およ
び反射膜２のない透過領域５に、第２層目のカラーフィ
ルタ層３ｂを顔料分散法などにより、感光性着色材料の
塗布、露光、現像を繰り返して０．８μｍの厚さで形成
する。Subsequently, a second color filter layer 3b is applied to the reflection region 4 on the reflection film 2 and the transmission region 5 without the reflection film 2 by coating and exposing a photosensitive coloring material by a pigment dispersion method or the like. The development is repeated to form a film having a thickness of 0.8 μm.
【００３７】そして、第２カラーフィルタ層３ｂの上
に、このカラーフィルタ層３ｂを透明電極を形成すると
き等の損傷から保護するとともに平滑化するために保護
膜６を形成する。Then, a protective film 6 is formed on the second color filter layer 3b to protect the color filter layer 3b from damage such as when a transparent electrode is formed and to smooth the color filter layer 3b.
【００３８】その後、図示しないが、保護膜６上に透明
電極を形成するとともに、カラーフィルタが形成されな
い透明基板１にも所定位置に透明電極を形成し、それぞ
れ配向制御膜を形成し、２つの透明電極基板をスペーサ
を介してシール材により貼り合わせ、所定位置でパネル
を分断するとともに、開口された液晶注入口から液晶セ
ル内に液晶７を注入・封止することで液晶表示パネルを
完成させる。その後、偏光板を取り付け、さらに透明基
板１の後方位置にバックライトユニットが取り付けられ
る。Thereafter, although not shown, a transparent electrode is formed on the protective film 6 and a transparent electrode is also formed at a predetermined position on the transparent substrate 1 on which the color filter is not formed. The liquid crystal display panel is completed by bonding the transparent electrode substrate with a sealing material via a spacer, dividing the panel at a predetermined position, and injecting and sealing the liquid crystal 7 into the liquid crystal cell from the opened liquid crystal injection port. . Thereafter, a polarizing plate is attached, and further, a backlight unit is attached at a position behind the transparent substrate 1.
【００３９】したがって、本第１実施例によれば、透過
領域５に第１カラーフィルタ層３ａを色調整層として形
成するため、透過領域５における光の色特性を反射領域
４における光の色特性に容易に一致させることができる
とともに、透過領域５および反射領域４のカラーフィル
タ層３ｂの上面位置を一致させることができ、液晶層ギ
ャップを均一化することができる。Therefore, according to the first embodiment, since the first color filter layer 3a is formed as a color adjustment layer in the transmission region 5, the color characteristics of light in the transmission region 5 are changed to the color characteristics of light in the reflection region 4. Can be easily matched, the upper surface positions of the color filter layer 3b in the transmission region 5 and the reflection region 4 can be matched, and the liquid crystal layer gap can be made uniform.
【００４０】つぎに、本発明の半透過型液晶表示パネル
の製造方法の第２実施形態について説明する。Next, a second embodiment of the method for manufacturing a transflective liquid crystal display panel of the present invention will be described.
【００４１】本第２実施形態の半透過型液晶表示パネル
の製造方法は、透明基板１上に反射膜２が配置されてい
る部分と配置されていない部分とを形成し、それぞれ反
射領域４と透過領域５とする。続いて前記反射膜２上の
反射領域４または反射膜２が形成されていない透過領域
５のいずれか一方にのみカラーフィルタ層３ｃ，３ｄを
形成する。このとき、各カラーフィルタ層３ｃ，３ｄの
色純度を同一にしてもよいし、異なるようにしてもよ
い。その後、まだカラーフィルタ層３ｃ，３ｄが形成さ
れていない他方の領域にカラーフィルタ層３ｃ，３ｄを
形成する。In the method of manufacturing a transflective liquid crystal display panel according to the second embodiment, a portion where the reflection film 2 is disposed and a portion where the reflection film 2 is not disposed are formed on the transparent substrate 1, and the reflection region 4 and the reflection region 4 are formed. The transmission region 5 is set. Subsequently, the color filter layers 3c and 3d are formed only on one of the reflection region 4 on the reflection film 2 and the transmission region 5 where the reflection film 2 is not formed. At this time, the color purity of each color filter layer 3c, 3d may be the same or different. After that, the color filter layers 3c and 3d are formed in the other area where the color filter layers 3c and 3d are not formed yet.
【００４２】このような第２実施形態の半透過型液晶表
示パネルの製造方法について、より具体的な実施例２を
図３を参照しつつ説明する。A method of manufacturing the transflective liquid crystal display panel according to the second embodiment will be described with reference to FIGS.
【００４３】本実施例２の半透過型液晶表示パネルの製
造方法は、まず、透過領域５に形成するカラーフィルタ
層３ｃについて色調整が必要であれば、あらかじめ着色
材料の色調整を行っておく。In the method of manufacturing a transflective liquid crystal display panel according to the second embodiment, first, if it is necessary to adjust the color of the color filter layer 3c formed in the transmission region 5, the color of the coloring material is adjusted in advance. .
【００４４】そして、ガラス材料またはプラスチック材
料からなる透明基板１上の全面に蒸着法あるいはスパッ
タ法等によりアルミ材料からなる反射膜２を０．２μｍ
の膜厚に形成し、フォトリソ法によりパターニングして
透過領域５とする部分の反射膜２をエッチングする。こ
れにより１ドット内に反射膜２を備えた反射領域４と反
射膜２を備えない透過領域５とを形成する。Then, a reflective film 2 made of an aluminum material is formed on the entire surface of a transparent substrate 1 made of a glass material or a plastic material by a vapor deposition method or a sputtering method to a thickness of 0.2 μm.
Then, the reflective film 2 in a portion that is to be the transmission region 5 after being patterned by the photolithography method is etched. As a result, a reflection area 4 having the reflection film 2 and a transmission area 5 having no reflection film 2 are formed in one dot.
【００４５】続いて、顔料分散法などにより、感光性着
色材料の塗布、露光、現像を繰り返し、透過領域５に
赤、緑、青の各色についてカラーフィルタ層３ｃを１．
０μｍで形成する。Subsequently, the application, exposure and development of the photosensitive coloring material are repeated by a pigment dispersion method or the like, and the color filter layer 3c for each color of red, green and blue is formed in the transmission area 5 in the order of 1.
Formed at 0 μm.
【００４６】続いて、同様の方法によって反射領域４の
反射膜２上に０．８μｍのカラーフィルタ層３ｄを形成
し、透過領域５のカラーフィルタ層３ｃの上面位置を一
致させる。Subsequently, a 0.8 μm color filter layer 3 d is formed on the reflection film 2 in the reflection area 4 by the same method, and the upper surface position of the color filter layer 3 c in the transmission area 5 is matched.
【００４７】そして、透過領域５および反射領域４のカ
ラーフィルタ層３ｄの上に保護膜６を形成する。その
後、実施例１と同様の工程を経て液晶表示パネルを完成
させる。Then, a protective film 6 is formed on the color filter layer 3d in the transmission area 5 and the reflection area 4. Thereafter, the liquid crystal display panel is completed through the same steps as in the first embodiment.
【００４８】したがって、本実施例２によれば、反射領
域４および透過領域５におけるカラーフィルタ層３ｃ，
３ｄをそれぞれ別個の過程において形成するため、両領
域での光の色特性が一致するようにカラーフィルタ層３
ｃ，３ｄの厚さや色特性を適当に調整することができ、
カラー画像表示を一致させることができるとともに、液
晶層ギャップを均一化することができる。Therefore, according to the second embodiment, the color filter layers 3c and 3c in the reflection area 4 and the transmission area 5 are formed.
3d are formed in separate processes, so that the color filter layer 3d is formed so that the color characteristics of light in both regions match.
The thickness and color characteristics of c and 3d can be adjusted appropriately,
The color image display can be matched, and the liquid crystal layer gap can be made uniform.
【００４９】なお、本発明は、前述した実施の形態に限
定されるものではなく、必要に応じて種々の変更が可能
である。It should be noted that the present invention is not limited to the above-described embodiment, and various modifications can be made as necessary.
【００５０】[0050]
【発明の効果】以上説明したように請求項１に係る発明
によれば、透過領域において光が透過するカラーフィル
タ層の距離を反射領域において光が通過するカラーフィ
ルタ層の距離に近づけることができるため、両領域を経
て表示されるカラー画像の色特性を近似させ、カラー画
像の色味を改善させることができる。As described above, according to the first aspect of the present invention, the distance of the color filter layer through which light passes in the transmission region can be made closer to the distance of the color filter layer through which light passes in the reflection region. Therefore, it is possible to approximate the color characteristics of a color image displayed through both regions, and improve the tint of the color image.
【００５１】また、請求項２に係る発明によれば、反射
領域および透過領域のカラーフィルタ層の色純度を任意
に設定することができるため、両領域のカラーフィルタ
層の色特性を最適な状態で確実に一致させることができ
る。According to the second aspect of the present invention, since the color purity of the color filter layers in the reflection area and the transmission area can be arbitrarily set, the color characteristics of the color filter layers in both areas can be optimized. Can be surely matched.
【００５２】また、請求項３に係る発明によれば、請求
項１または請求項２に係る発明の効果に加えて、反射領
域および透過領域の液晶層ギャップを均一に保持するこ
とができる。According to the third aspect of the present invention, in addition to the effects of the first or second aspect, the gap between the liquid crystal layers in the reflection region and the transmission region can be maintained uniformly.
【００５３】また、請求項４に係る発明によれば、透過
領域において光が透過するカラーフィルタ層の距離が、
反射領域において反射して光が通過するカラーフィルタ
層の距離に、第１カラーフィルタ層の厚さ分だけ近づけ
ることができるため、両領域を経て表示されるカラー画
像の色特性を近似させることができる。According to the fourth aspect of the present invention, the distance of the color filter layer through which light passes in the transmission region is
Since the thickness of the first color filter layer can be made closer to the distance of the color filter layer through which light is reflected in the reflection area, the color characteristics of a color image displayed through both areas can be approximated. it can.
【００５４】また、請求項５に係る発明によれば、両領
域での光の色特性が一致するようにカラーフィルタ層の
厚さや色特性を適当に調整することができる。According to the fifth aspect of the present invention, the thickness and color characteristics of the color filter layer can be appropriately adjusted so that the color characteristics of light in both regions match.
【図１】 本発明に係る半透過型液晶表示パネルのカラ
ーフィルタ層の構造を示す図FIG. 1 is a diagram showing a structure of a color filter layer of a transflective liquid crystal display panel according to the present invention.
【図２】 本発明に係る半透過型液晶表示パネルの製造
方法の実施例１を示す一部を省略した工程図FIG. 2 is a partially omitted process diagram showing a first embodiment of a method of manufacturing a transflective liquid crystal display panel according to the present invention.
【図３】 本発明に係る半透過型液晶表示パネルの製造
方法の実施例２を示す一部を省略した工程図FIG. 3 is a partially omitted process diagram showing a second embodiment of a method of manufacturing a transflective liquid crystal display panel according to the present invention.
【図４】 従来の半透過型液晶表示パネルのカラーフィ
ルタ層の構造を示す図FIG. 4 is a diagram showing a structure of a color filter layer of a conventional transflective liquid crystal display panel.
【図５】 従来の液晶表示パネルの製造方法を示す一部
を省略した工程図FIG. 5 is a partially omitted process diagram showing a conventional liquid crystal display panel manufacturing method.
１ 透明基板 ２ 反射膜 ３ カラーフィルタ層 ３ａ 第１カラーフィルタ層 ３ｂ 第２カラーフィルタ層 ３ｃ 透過領域側のカラーフィルタ層 ３ｄ 反射領域側のカラーフィルタ層 ４ 反射領域 ５ 透過領域 REFERENCE SIGNS LIST 1 transparent substrate 2 reflective film 3 color filter layer 3 a first color filter layer 3 b second color filter layer 3 c color filter layer on transmission area side 3 d color filter layer on reflection area side 4 reflection area 5 transmission area
Claims (5)
反射膜を配置してその反射膜上にカラーフィルタ層を形
成してなる反射領域と、反射膜を配置せずにカラーフィ
ルタ層を形成してなる透過領域とを有する半透過型液晶
表示パネルにおいて、前記透過領域のカラーフィルタ層
の厚さを前記反射領域のカラーフィルタ層の厚さよりも
大きくしたことを特徴とする半透過型液晶表示パネル。1. Within one dot on the inner surface of a liquid crystal cell,
In a transflective liquid crystal display panel having a reflective area in which a reflective film is disposed and a color filter layer is formed on the reflective film, and a transmissive area in which a color filter layer is formed without disposing the reflective film A transflective liquid crystal display panel, wherein the thickness of the color filter layer in the transmissive area is larger than the thickness of the color filter layer in the reflective area.
反射膜を配置してその反射膜上にカラーフィルタ層を形
成してなる反射領域と、反射膜を配置せずにカラーフィ
ルタ層を形成してなる透過領域とを有する半透過型液晶
表示パネルにおいて、前記反射領域で反射されてカラー
フィルタ層を２度通過する光の色特性と、前記透過領域
のカラーフィルタ層を１度だけ通過する光の色特性とが
一致するように、前記反射領域および前記透過領域のカ
ラーフィルタ層をそれぞれ異なる色純度に形成したこと
を特徴とする半透過型液晶表示パネル。2. Within one dot on the inner surface of the liquid crystal cell,
In a transflective liquid crystal display panel having a reflective area in which a reflective film is disposed and a color filter layer is formed on the reflective film, and a transmissive area in which a color filter layer is formed without disposing the reflective film The reflection region and the light reflected by the reflection region and passing through the color filter layer twice and the color characteristics of light passing through the color filter layer only once in the transmission region match. A transflective liquid crystal display panel, wherein the color filter layers in the transmissive regions are formed with different color purities.
位置と、前記反射領域のカラーフィルタ層の上面位置と
が一致するように各カラーフィルタ層を形成したことを
特徴とする請求項１または請求項２に記載の半透過型液
晶表示パネル。3. The color filter layer according to claim 1, wherein the upper surface position of the color filter layer in the transmission region and the upper surface position of the color filter layer in the reflection region match. Item 3. A transflective liquid crystal display panel according to item 2.
反射膜を配置してその反射膜上にカラーフィルタ層を形
成してなる反射領域と、反射膜を配置せずにカラーフィ
ルタ層を形成してなる透過領域とを有する半透過型液晶
表示パネルの製造方法において、反射膜を形成した後に
透過領域にのみ第１のカラーフィルタ層を形成し、その
後に前記反射膜および前記第１カラーフィルタ層の上に
第２のカラーフィルタ層を形成するようにしたことを特
徴とする半透過型液晶表示パネルの製造方法。4. Within one dot on the inner surface of the liquid crystal cell,
A transflective liquid crystal display panel having a reflective region in which a color filter layer is formed on a reflective film by disposing a reflective film and a transmissive region in which a color filter layer is formed without disposing the reflective film. In the manufacturing method, a first color filter layer is formed only in a transmission region after a reflective film is formed, and then a second color filter layer is formed on the reflective film and the first color filter layer. A method for manufacturing a transflective liquid crystal display panel.
反射膜を配置してその反射膜上にカラーフィルタ層を形
成してなる反射領域と、反射膜を配置せずにカラーフィ
ルタ層を形成してなる透過領域とを有する半透過型液晶
表示パネルの製造方法において、反射膜を形成した後
に、その反射膜上の反射領域または反射膜が形成されて
いない透過領域のいずれか一方にのみカラーフィルタ層
を形成し、その後に他方の領域にカラーフィルタ層を形
成するようにしたことを特徴とする半透過型液晶表示パ
ネルの製造方法。5. One dot on the inner surface of a liquid crystal cell,
A transflective liquid crystal display panel having a reflective region in which a color filter layer is formed on a reflective film by disposing a reflective film and a transmissive region in which a color filter layer is formed without disposing the reflective film. In the manufacturing method, after forming the reflection film, a color filter layer is formed only on one of the reflection region on the reflection film or the transmission region on which the reflection film is not formed, and then the color filter layer is formed on the other region. A method for manufacturing a transflective liquid crystal display panel, characterized in that
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| JP4521089B2 JP4521089B2 (en) | 2010-08-11 |
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| JP2003098337A (en) * | 2001-06-04 | 2003-04-03 | Toray Ind Inc | Color filter and liquid crystal display device |
| KR20030058728A (en) * | 2001-12-31 | 2003-07-07 | 비오이 하이디스 테크놀로지 주식회사 | Color filter of liquid crystal display and method for fabricating the same |
| WO2003102638A1 (en) * | 2002-06-04 | 2003-12-11 | Toray Industries, Inc. | Color filter for liquid crystal display and semitransmission liquid crystal display |
| US6785068B2 (en) | 2001-07-13 | 2004-08-31 | Seiko Epson Corporation | Color filter substrate and electro-optical device, manufacturing method for color filter substrate and manufacturing method for electro-optical device, and electronic equipment |
| US6798473B2 (en) | 2002-03-25 | 2004-09-28 | Citizen Watch Co., Ltd. | Color liquid crystal display device and manufacturing method thereof |
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| US7298439B2 (en) | 2001-09-25 | 2007-11-20 | Seiko Epson Corporation | Transflective liquid crystal device with particular color filter thickness adjusting layer stacking and reflective and electronic apparatus using the same |
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| US7119861B2 (en) | 2002-03-26 | 2006-10-10 | Seiko Epson Corporation | Liquid crystal display and electronic apparatus |
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| US7528908B2 (en) * | 2002-06-04 | 2009-05-05 | Toray Industries, Inc. | Color filter for liquid crystal display and semitransmission liquid crystal display |
| WO2003102638A1 (en) * | 2002-06-04 | 2003-12-11 | Toray Industries, Inc. | Color filter for liquid crystal display and semitransmission liquid crystal display |
| US7369193B2 (en) | 2002-12-02 | 2008-05-06 | Samsung Electronics Co., Ltd. | Color filter panel, manufacturing method thereof and transflective liquid crystal display including the same |
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