Liquid crystal display panel, electronic apparatus equipped with the same, and method for manufacturing liquid crystal display panel
View Patent ↗There is provided a liquid crystal display panel that includes an array substrate having at least a pixel electrode and a switching element for every pixel area in a display area on a transparent substrate, a color filter substrate in which a light shielding layer made of a resin is formed on a transparent substrate at least outside the display area and a color filter layer is formed to oppose the pixel electrode, and liquid crystal enclosed between the array substrate and the color filter substrate that are bonded by a seal material. A protection film having an opening, the opening being opened in the display area, is formed on the color filter substrate in the outside of the display area to cover at least the portion of the light shielding layer on which the seal material is formed.
1. A liquid crystal display panel comprising:
an array substrate having at least a pixel electrode and a switching element for every pixel area in a display area on a transparent substrate;
a color filter substrate in which a light shielding layer made of a resin is formed on a transparent substrate at least outside the display area and a color filter layer is formed to oppose the pixel electrode;
a common electrode that covers the light shielding layer at the border between the display area and the light shielding layer; and
liquid crystal enclosed between the array substrate and the color filter substrate that are bonded by a seal material, wherein
a protection film having an opening, the opening being opened in the display area, is formed on the color filter substrate in the outside of the display area to cover at least the portion of the light shielding layer on which the seal material is formed; and
wherein the protection film covers only a frame portion of the light shielding layer, the frame portion corresponding to an area where the light shielding layer does not overlap the display area.
2. The liquid crystal display panel according to claim 1 , wherein the protection film is formed to surround the display area.
3. The liquid crystal display panel according to claim 1 , wherein
the pixel area has a transmissive portion and a reflective portion, and
the protection film is a transparent resin and the opening is formed at a position corresponding to the transmissive portion.
4. The liquid crystal display panel according to claim 3 , wherein the opening is formed to stride across the adjacent transmissive portions.
5. The liquid crystal display panel according to claim 3 , wherein if a distance between a surface of the array substrate and a surface of the color filter substrate in the transmissive portion is Ha, and if a distance between a surface of the array substrate and a surface of the color filter substrate in the reflective portion is Hb, a thickness of the protection film is set to satisfy a relation described below: Hb=½Ha.
6. An electronic apparatus comprising the liquid crystal display panel according to claim 1 .
7. The liquid crystal display panel according to claim 1 , wherein the seal material is bonded to the array substrate through a passivation film.
8. A method for manufacturing a liquid crystal display panel that includes
an array substrate in which a pixel electrode and a switching element are formed for every pixel area in a display area on a transparent substrate, and
a color filter substrate in which a light shielding layer made of a resin is formed on a transparent substrate and a color filter layer is formed to oppose the pixel electrode, and
in which the array substrate and the color filter substrate are bonded together by a seal material and liquid crystal is enclosed between the array substrate and the color filter substrate, the method for manufacturing a liquid crystal display panel comprising:
forming the light shielding layer made of a resin on the color filter substrate to separate the pixel area;
forming the color filter layer on the color filter substrate for every the pixel area; forming a common electrode layer that covers the light shielding layer at the border between the display area and the light shielding layer;
forming a protection film, the portion of the protection film corresponding to the display area being opened, on the color filter substrate on which the light shielding layer made of a resin and the color filter layer are formed; and
applying the seal material outside the display area and bonding the array substrate and the color filter substrate together; and
wherein the protection film covers only a frame portion of the light shielding layer, the frame portion corresponding to an area where the light shielding layer does not overlap the display area.
9. The method for manufacturing a liquid crystal display panel according to claim 8 , wherein
the pixel area has a transmissive area and a reflective area,
the protection film is made of a transparent resin, and
when forming the protection film, the protection film is formed so that a portion correspond to the transmissive portion is opened, and if a distance between a surface of the array substrate and a surface of the color filter substrate in the transmissive portion is Ha and if a distance between a surface of the array substrate and a surface of the color filter substrate in the reflective portion is Hb, a thickness of the protection film is set to satisfy a relation described below: Hb=½Ha.
10. The method for manufacturing a liquid crystal display panel according to claim 8 , wherein
in bonding the array substrate and the color filter substrate together, the seal material is bonded to a passivation film at the end of the array substrate side.