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LCD Production Frame
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1. LCD panel's constitution
The main difference between TN type and STN type lies in the twisted angle . TN LC. has a twisted angle of 90 while STN LC's twisted angle can have 90—270. With the change of twisted angle and different angle of polarizer film, STN panel can display yellow-green, blue and gray modes. TN panel has positive and negative features. STN panels are superior to TN panels in more duty cycles and excellent opto-electro functions.
Based on STN, FSTN panel has retardation films added to compensate the interfering color of STN so that a real black and white color could be realized. Different angle of retardation film can make different displays, i.e. positive, white background with black character; negative, black background with white character.
Holographic FSTN display is an FSTN display with an additional holographic film attached. Its display effect is more beautiful than FSTN and it has a higher photoelectrical parameters.2. Flowchart for key process
3. A brief of main processes
Photolithography: forming electrodes in the form required on the ITO film.