Semi-transmissive-type liquid crystal display device and method for manufacturing same
First Claim
1. A semi-transmissive-type liquid crystal display device comprising:
- a first substrate including a plurality of signal electrodes being arranged in parallel to one another along a first direction;
a second substrate including a plurality of scanning electrodes being arranged in parallel to one another along a second direction orthogonal to said first direction and a plurality of pixel regions each being placed in a one-to-one correspondence to an intersection between each of said signal electrodes and each of said scanning electrodes;
a liquid crystal layer inserted between said first substrate and said second substrate;
a backlight source to feed light to said liquid crystal layer; and
wherein each of said pixel regions includes a reflective region having a reflective film to receive ambient light from an outside and to display in a reflective manner while being in a reflective display mode, and a transmissive region having a transmissive electrode film to allow light from said backlight source to be transmitted to display in a transmissive manner at time of operations in a transmissive display mode; and
wherein in each of said pixel regions, said transparent electrode film is extended to said reflective film in a manner to cover at least one part of said reflective film.
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Accused Products
Abstract
A semi-transmissive-type liquid crystal display device is provided which is capable of preventing an electric erosion reaction between a reflective film made of Al (aluminum) or an Al alloy and a transparent electrode film made of ITO or a like (Indium Tin Oxide) and of inhibiting occurrence of a flicker caused by a residual DC (Direct Current) voltage in the reflective film. In the semi-transmissive-type of a liquid crystal display device, a transmissive region to provide light from a backlight source and a reflective region to receive ambient light are placed in a pixel region and a transparent electrode film is formed above a reflective film formed in the reflective region on an active matrix substrate with a second passivation film being interposed between the reflective film and the transparent electrode film.
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Citations
21 Claims
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1. A semi-transmissive-type liquid crystal display device comprising:
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a first substrate including a plurality of signal electrodes being arranged in parallel to one another along a first direction;
a second substrate including a plurality of scanning electrodes being arranged in parallel to one another along a second direction orthogonal to said first direction and a plurality of pixel regions each being placed in a one-to-one correspondence to an intersection between each of said signal electrodes and each of said scanning electrodes;
a liquid crystal layer inserted between said first substrate and said second substrate;
a backlight source to feed light to said liquid crystal layer; and
wherein each of said pixel regions includes a reflective region having a reflective film to receive ambient light from an outside and to display in a reflective manner while being in a reflective display mode, and a transmissive region having a transmissive electrode film to allow light from said backlight source to be transmitted to display in a transmissive manner at time of operations in a transmissive display mode; and
wherein in each of said pixel regions, said transparent electrode film is extended to said reflective film in a manner to cover at least one part of said reflective film. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A semi-transmissive-type liquid crystal display device comprising:
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a first substrate including a plurality of signal electrodes being arranged in parallel to one another along a first direction;
a second substrate including a plurality of scanning electrodes being arranged in parallel to one another along a second direction orthogonal to said first direction and a plurality of pixel regions each being placed in a one-to-one correspondence to an intersection between each of said signal electrodes and each of said scanning electrodes;
a liquid crystal layer inserted between said first substrate and said second substrate;
a backlight source to feed light to said liquid crystal layer; and
wherein each of said pixel regions includes a reflective region having a reflective film to receive ambient light from an outside and to display in a reflective manner while being in a reflective display mode, and a transmissive region having a transmissive electrode film to allow light from said backlight source to be transmitted to display in a transmissive manner at time of operations in a transmissive display mode; and
wherein in each of said pixel regions, a first gap between said first substrate and said second substrate in said reflective region and a second gap between said first substrate and said second substrate in said transmissive region are calibrated so that reflectance or transmittance in white display is maximized according to a twisted angle of said liquid crystal layer. - View Dependent Claims (12, 13, 14)
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15. A method for manufacturing a semi-transmissive-type liquid crystal display device comprising a first substrate including a plurality of signal electrodes being arranged in parallel to one another along a first direction;
- a second substrate including a plurality of scanning electrodes being arranged in parallel to one another along a second direction orthogonal to said first direction and a plurality of pixel regions each being placed in a one-to-one correspondence to an intersection between each of said signal electrodes and each of said scanning electrodes;
a liquid crystal layer inserted between said first substrate and said second substrate;
a backlight source to feed light to said liquid crystal layer; and
wherein each of said pixel regions includes a reflective region having a reflective film to receive ambient light from an outside and to display in a reflective manner while being in a reflective display mode, and a transmissive region having a transmissive electrode film to allow light from said backlight source to be transmitted to display in a transmissive manner at time of operations in a transmissive display mode, said method comprising;
a first process of forming said reflective film making up said reflective region on a surface of said first substrate facing said second substrate; and
a second process of forming said transparent electrode film making up said transmissive region in a manner that said transparent electrode film covers part or all of said reflective film. - View Dependent Claims (16, 17)
- a second substrate including a plurality of scanning electrodes being arranged in parallel to one another along a second direction orthogonal to said first direction and a plurality of pixel regions each being placed in a one-to-one correspondence to an intersection between each of said signal electrodes and each of said scanning electrodes;
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18. A method for manufacturing a semi-transmissive-type liquid crystal display device comprising a first substrate including a plurality of signal electrodes being arranged in parallel to one another along a first direction, a second substrate including a plurality of scanning electrodes being arranged in parallel to one another along a second direction orthogonal to said first direction and a plurality of pixel regions each being placed in a one-to-one correspondence to an intersection between each of said signal electrodes and each of said scanning electrodes;
- a liquid crystal layer inserted between said first substrate and said second substrate;
a backlight source to feed light to said liquid crystal layer; and
wherein each of said pixel regions includes a reflective region having a reflective film to receive ambient light from an outside and to display in a reflective manner while being in a reflective display mode, and a transmissive region having a transmissive electrode film to allow light from said backlight source to be transmitted to display in a transmissive manner at time of operations in a transmissive display mode, said method comprising;
a process of performing a calibration on a first gap between said first substrate and said second substrate in said reflective region and a second gap between said first substrate and said second substrate in said transmissive region so that reflectance or transmittance in white display is maximized according to a twisted angle of said liquid crystal layer by inserting said liquid crystal layer between said first substrate and said second substrate, wherein said first substrate is formed by processes of forming said reflective film making up said reflective region on a surface of said first substrate facing said second substrate and of forming said transparent electrode film making up said transmissive region in a manner that said transparent electrode film covers part or all of said reflective film. - View Dependent Claims (19, 20, 21)
- a liquid crystal layer inserted between said first substrate and said second substrate;
Specification