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Driving method for switchable 2D/3D lenticulars Disclosure Number: IPCOM000083334D
Publication Date: 2005-Mar-01
Document File: 1 page(s) / 6K

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ID 692345

Driving method for switchable 2D/3D lenticulars

For 2D/3D displays 2D to 3D switchability can be obtained by switching the lenses on and off. Between two glass plates with Indium Tin Oxide (ITO), there is on one glass plate with a lens structure made by for instance replication technique. On this lens structure and the opposite glass plate there is an orientation layer and in between those layers there is LC material During the construction of such a display two problems were encountered.

Firstly, the display makes a sound at the driving frequency. Secondly, there is an interaction between the display and the driving that results in disturbed images. Due to the electrostatic force between the electrode at the backplane of the switchable lenticular and the (common) electrode of the LCD display, the LCD display and the switchable cell are attracted to each other and generate a sound at the same frequency as the driving frequency.

Secondly, there was sometimes an interaction between the switchable cell and the display that resulted in disturbed and scrolling images on the LCD display. This is the result of an EMC problem.

Both problems were solved by a modified driving scheme, in which the electrode of the switchable lenses on the display side (backplane) was put at a fixed potential (preferably earth-potential). In this way there is no electrostatic force between the common electrode of the LCD and the electrode on the backplane of the switchable lenses....