1. Technical Field
The present invention relates to an electro-optical device, an electronic apparatus having the same, and a mounting structure in which a member is mounted on a mounting substrate, and more particularly, to a technique of performing diagnosis of an electro-optical device and a mounting structure.
2. Related Art
In general, in electro-optical devices, such as active matrix liquid crystal devices, a driving IC and a flexible substrate are mounted on an electro-optical device substrate holding an electro-optical material, and each pixel is driven by signals output from the driving IC or signals generated based on the signals output from the driving IC (for example, see Japanese Unexamined Patent Application Publication No. 2003-57677)
Further, an electro-optical device substrate or a flexible substrate also has a power supply IC, an EPROM, an IC for driving an LED for a backlight, etc., mounted thereon, in addition to the driving IC. However, when a defect occurs in any one of these ICs, a great deal of labor is required to pinpoint the cause of the defect. Therefore, there has been proposed a technique of providing an IC with a self-diagnostic function (for example, see Japanese Unexamined Patent Application Publication No. 5-315418).
In an electro-optical device disclosed in Japanese Unexamined Patent Application Publication No. 2003-57677, an electro-optical device substrate is composed of a rigid substrate, such as a glass substrate. When a crack occurs in this substrate, various wiring lines are broken, which results in defects in display. However, it is difficult to find such a connection defect even if an IC having the self-diagnostic function is provided, as described in Japanese Unexamined Patent Application Publication No. 5-315418.
Further, in a case in which a plurality of ICs is mounted on an electro-optical device substrate or a flexible substrate, when each of the plurality of ICs has a self-diagnostic function, it is necessary for each of the plurality of ICs to output self-diagnosis results, which causes a circuit structure to become complicated.