Liquid crystal display device having a gap retaining member made of resin formed directly over the driver circuit
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorsYoshiharu Hirakata, Takeshi Nishi, Shunpei Yamazaki
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Abstract
In an active matrix semiconductor display device in which pixel TFTs and driver circuit TFT are formed on the same substrate in an integral manner, the cell gap is controlled by gap retaining members that are disposed between a pixel area and driver circuit areas. This makes it possible to provide a uniform cell thickness profile over the entire semiconductor display device. Further, since conventional grainy spacers are not used, stress is not imposed on the driver circuit TFTs when a TFT substrate and an opposed substrate are bonded together. This prevents the driver circuit TFTs from being damaged.
Claims28
A display device comprising:
- a first substrate;
- a switching element formed in a pixel area over the first substrate;
- an interlayer insulating film comprising an organic resin formed over the switching element;
- a pixel electrode formed over the interlayer insulating film and electrically connected to the switching element;
- a driver circuit comprising a thin film transistor formed over the first substrate;
- a second substrate opposed to the first substrate;
- a liquid crystal layer disposed between the first substrate and the second substrate;
- a plurality of first gap retaining members comprising a photosensitive resin material formed in the pixel area over the second substrate;
- a plurality of second gap retaining members comprising a photosensitive resin material formed directly over the driver circuit over the second substrate,
- wherein an interval between the plurality of first gap retaining members is different from an interval between the plurality of second gap retaining members.
A display device comprising:
- a first substrate;
- a switching element formed in a pixel area over the first substrate;
- an interlayer insulating film formed over the switching element;
- a pixel electrode formed over the interlayer insulating film and electrically connected to the switching element;
- a driver circuit comprising a thin film transistor formed over the first substrate;
- a second substrate opposed to the first substrate;
- a liquid crystal layer disposed between the first substrate and the second substrate;
- a plurality of first gap retaining members comprising a photosensitive resin material formed in the pixel area over the second substrate;
- a plurality of second gap retaining members comprising a photosensitive resin material formed directly over the driver circuit over the second substrate,
- wherein an interval between the plurality of first gap retaining members is different from an interval between the plurality of second gap retaining members.
A display device comprising:
- a first substrate;
- a switching element in a pixel area over the first substrate;
- an interlayer insulating film formed over the switching element;
- a pixel electrode formed over the interlayer insulating film and electrically connected to the switching element;
- a driver circuit comprising a thin film transistor formed over the first substrate;
- a second substrate opposed to the first substrate;
- a liquid crystal layer disposed between the first substrate and the second substrate;
- a plurality of gap retaining members comprising a photosensitive resin material formed in the pixel area and directly over the driver circuit between the first substrate and the second substrate,
- wherein a shape of at least one of the plurality of gap retaining members and a shape of at least another one of the plurality of gap retaining members are different, and
- wherein an interval between the gap retaining members in the pixel area is different from an interval between the gap retaining members directly over the driver circuit.
Dependencies are inferred from the claim text.