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Temperature compensation for 2D/3D switchable displays Disclosure Number: IPCOM000083335D
Publication Date: 2005-Mar-01
Document File: 1 page(s) / 5K

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ID 693858

Temperature compensation for 2D/3D switchable displays

Most 2D/3D switchable display currently being developed are based on LC lenses which show temperature dependence of the lens strength. To have an optimal performance over the whole temperature range, the lens strength can however be adjusted by applying a (small) voltage across the cell.

For a higher temperature, the lens strength is less and the lens strength can only be reduced and not increased by applying a voltage across the (lens) cell. Therefore, the lens needs to be optimized for a maximum temperature. For lower temperatures the lens strength can be adjusted by applying a voltage across the cell.

However, a high voltage results in a high power consumption. The cell is driven by a AC voltage, so the power consumption is proportional to the square of the voltage. Reducing the driving voltage results in a reduced power consumption. Equipping the display with a temperature sensor and adjusting the voltage applied to the cell in 3D and 2D mode gives an optimal performance in 3D mode and a reduced power consumption in 2D mode.

In some LCD screens a temperature sensor is already available. In this case this sensor can be used to control the lenses.

So a method is proposed to obtain a good display performance in 3D mode for all temperatures, by designing the lenses for a high temperature and adjusting the lens strength for a lower temperature by lowering the drive voltages. For the 2D mode the drivi...