Method of manufacturing a display device having an orientation film
View Patent ↗The present invention relates to a method of manufacturing a liquid crystal display device having a TFT substrate and a counter substrate, and prevents brightness unevenness from being caused by orientation film thickness unevenness. Orientation films for the TFT substrate ( 10 ) and the counter substrate ( 20 ) are formed by offset printing that is performed to transfer an orientation film material from a printing plate to the TFT substrate ( 10 ).The direction in which the printing plate for an offset printing machine rotates during offset printing is the long-axis direction of the TFT substrate ( 10 ) in the case of the TFT substrate ( 10 ) or the short-axis direction of the counter substrate in the case of the counter substrate. This ensures that brightness unevenness caused by orientation film thickness unevenness is inconspicuous even when the orientation film thickness unevenness is produced during offset printing.
1. A method of manufacturing a liquid crystal display device that includes a TFT substrate having a TFT, a pixel electrode, a scanning line, a video signal line, and an orientation film, a counter substrate having an orientation film, and a liquid crystal layer sandwiched between the orientation film for the TFT substrate and the orientation film for the counter substrate, the method comprising the steps of:
forming the orientation film for the TFT substrate by offset printing that is performed to transfer an orientation film material from a printing plate to the TFT substrate, the direction in which the printing plate rotates during the offset printing being a first direction of the TFT substrate; and
forming the orientation film for the counter substrate by offset printing that is performed to transfer an orientation film material from a printing plate to the counter substrate, the direction in which the printing plate rotates during the offset printing being perpendicular to the first direction of the TFT substrate.
2. The liquid crystal display device manufacturing method according to claim 1 , wherein the first direction is the extension direction of the scanning line.
3. A method of manufacturing a liquid crystal display device that includes a TFT substrate having a TFT, a pixel electrode, a scanning line, a video signal line, and an orientation film, a counter substrate having an orientation film, and a liquid crystal layer sandwiched between the orientation film for the TFT substrate and the orientation film for the counter substrate, the method comprising the steps of:
forming the orientation film for the TFT substrate by dripping an orientation film material from an inkjet nozzle while relatively moving the inkjet nozzle and the TFT substrate in a first direction; and
forming the orientation film for the counter substrate by dripping an orientation film material from an inkjet nozzle while relatively moving the inkjet nozzle and the counter substrate in a direction perpendicular to the first direction.
4. The liquid crystal display device manufacturing method according to claim 3 , wherein the first direction is the extension direction of the scanning line.