lcd_shutter_close time 320 us. - a photo on Flickriver

            Lcd_shutter hack from SSG-5100 3D shutter glasses. This shutter is mounted before the background LED module. The shutter must be closed as the foreground LED module is on. Without this shutter you obtain too many reflections of the white reflection ballon  of the background LED module. Once the foreground exposure is done, the shutter may open again to allow the background exposure.

The shutter works with a square wave signal of 12V peak at 1Khz. This close the shutter. To open the shutter the 2 connection pins need the same voltage. This will be 6V here with a difference of less than 5 mV. There should be no DC offset so as not to degrade the LCD in the the long time.

With the LCD shutter open I obtain with an background  exposure time of 4msec, a histogram level of 200, once closed, the light value is no longer measurable. Useful area is 24x40 mm. This shutter fits the Cokin filter holder. LCD glass is attached with double adhesive tape.

Time to close the shutter glass 320 us.

Taken on: April 26, 2015

Sets appears in: • setups 2014-2024

Stats: 1,979 views

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