Oriented film printing plate and manufacturing method for liquid crystal display device
View Patent ↗In order to prevent protruded parts formed on an oriented film print pattern of a printing plate for flexographic printing from being lost, a linear bank is formed on the periphery of one side of the oriented film print pattern where wiping work is started. The bank prevents the protruded part in the oriented film print pattern from being lost by the wiping work. The protruded parts are formed in a matrix in order to retain an oriented film liquid in the oriented film print pattern. Thickness irregularity of the oriented film due to presence of the bank is reduced by making the diameters of the protruded parts smaller in a peripheral region than in a central region of the oriented film print pattern and forming a space between the peripheral-side protruded parts and the bank.
1. An oriented film printing plate that retains an oriented film liquid supplied from an anilox roll and flexographically prints an oriented film on a substrate,
wherein
a plurality of oriented film print patterns are formed on the oriented film printing plate,
each of the oriented film print patterns includes protruded parts formed in a matrix and a linear bank formed at least on one side of the periphery,
diameters of the protruded parts are made smaller in a peripheral region than in a central region of the oriented film print pattern and a space is formed between the protruded parts in the peripheral region and the linear bank, and
a pitch of the protruded parts in the central region is the same as a pitch of the protruded parts in the peripheral region of the oriented film print pattern.
2. The oriented film printing plate according to claim 1 , wherein the linear bank is formed on four sides including the one side.
3. The oriented film printing plate according to claim 1 , wherein d2/d1 is 20% to 70% where d1 is a diameter of the protruded part in the central region of the oriented film print pattern and d2 is a diameter of the protruded part in the peripheral region of the oriented film print pattern.
4. The oriented film printing plate according to claim 2 , wherein d2/d1 is 20% to 70% where d1 is a diameter of the protruded part in the central region of the oriented film print pattern and d2 is a diameter of the protruded part in the peripheral region of the oriented film print pattern.
5. The oriented film printing plate according to claim 3 , wherein d2/d1 is 30% to 50% where d1 is the diameter of the protruded part in the central region of the oriented film print pattern and d2 is the diameter of the protruded part in the peripheral region of the oriented film print pattern.
6. The oriented film printing plate according to claim 4 , wherein d2/d1 is 30% to 50% where d1 is the diameter of the protruded part in the central region of the oriented film print pattern and d2 is the diameter of the protruded part in the peripheral region of the oriented film print pattern.
7. A manufacturing method for a liquid crystal display device which includes a TFT substrate including a TFT, a pixel electrode and an oriented film and a counter substrate including an oriented film and in which a liquid crystal layer is nipped and held between the oriented film of the TFT substrate and the oriented film of the counter substrate,
wherein the oriented film is formed by flexographic printing, and
the flexographic printing is performed by using the oriented film printing plate according to claim 1 .
8. A manufacturing method for a liquid crystal display device which includes a TFT substrate including a TFT, a pixel electrode and an oriented film and a counter substrate including an oriented film and in which a liquid crystal layer is nipped and held between the oriented film of the TFT substrate and the oriented film of the counter substrate,
wherein the oriented film is formed by flexographic printing, and
the flexographic printing is performed by using the oriented film printing plate according to claim 2 .
9. A manufacturing method for a liquid crystal display device which includes a TFT substrate including a TFT, a pixel electrode and an oriented film and a counter substrate including an oriented film and in which a liquid crystal layer is nipped and held between the oriented film of the TFT substrate and the oriented film of the counter substrate,
wherein the oriented film is formed by flexographic printing, and
the flexographic printing is performed by using the oriented film printing plate according to claim 3 .
10. The oriented film printing plate according to claim 1 , wherein the protruded parts of the oriented film print pattern in the peripheral region are configured to retain more oriented film liquid than the protruded parts of the oriented film print pattern in the central region.
11. The oriented film printing plate according to claim 1 , wherein a height of the protruded parts in the central region of the oriented film print pattern is substantially the same as a height of the protruded parts in the peripheral region of the oriented film print pattern.
12. The oriented film printing plate according to claim 1 , wherein a height of the protruded parts is substantially the same as a height of the linear bank.