Patent ID: 8395749

Claim:
A liquid crystal display device comprising: a component substrate that includes a transistor device; an opposing substrate that is disposed so as to face the component substrate through a liquid crystal layer; a back light that is disposed on a side of the component substrate that is located opposite to the opposing substrate; a first measurement portion that is formed on a surface of the component substrate located on the liquid crystal layer side and is used for measuring a difference between bonding positions of the component substrate and the opposing substrate; a second measurement portion that is formed on a surface of the opposing substrate located on the liquid crystal layer side and is used for measuring a difference between the bonding positions of the component substrate and the opposing substrate; a measurement opening portion that is disposed on the second measurement portion side; and a light shielding layer that is disposed between the component substrate and the second measurement portion and prevents transmission of light emitted from the back light through the measurement opening portion.