Patent ID: 8760612

Claim:
A display device, comprising: a first light transmissive substrate comprising: a display region in which an image is to be displayed in accordance with passing and blocking of light and intensity of the light; and a periphery region surrounding the display region; a light shielding portion formed in at least the periphery region of the first light transmissive substrate, the light shielding portion having an opening portion in the periphery region; a first scale mark portion formed on the first light transmissive substrate so as to be arranged inside the opening portion; a second light transmissive substrate arranged so as to overlap the first light transmissive substrate; a thin film transistor, which is formed on the second light transmissive substrate, for controlling the passing and blocking of the light and the intensity of the light; and a second scale mark portion, which is formed on the second light transmissive substrate and forms a pair with the first scale mark portion, wherein: the second light transmissive substrate includes a first metal layer, a semiconductor layer, and a second metal layer which are laminated one on top of another; the thin film transistor is formed so as to include a part of the first metal layer, a part of the semiconductor layer, and a part of the second metal layer; the second scale mark portion is formed of another part of the second metal layer; under the second scale mark portion, another part of the semiconductor layer is formed so as to extend off from the second scale mark portion; and below the second scale mark portion and the semiconductor layer, another part of the first metal layer is formed in a size capable of shielding the opening portion; further comprising: liquid crystal; a sealing member for sealing the liquid crystal between the first light transmissive substrate and the second light transmissive substrate; and a dam portion formed on the first light transmissive substrate, wherein: the sealing member is arranged in the periphery region of the first light transmissive substrate on the display region side with respect to the opening portion of the light shielding portion; and the dam portion is arranged between the sealing member and the opening portion so as to separate the opening portion from the sealing member.