| Electronics > Repair |
| Help,Can ordinary LEDs replace thin-film LEDs? |
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| daisizhou:
This is a ventilator.It is no longer used on patients.I usually use it to learn and practice the operation of the ventilator. Due to the long time,Aging of the digital luminous film of the main display.I unpacked it,Found that there are 5 HV6506PJ drivers, I guess 4 HV6506PJs should be used for the step display, and 1 HV6506PJ should be used for the 2 8-bit digital tubes in the center. https://www.scribd.com/document/249426163/Manual-e100m-Serman-Rev-d-2202 104 pages I hope to fix it cheaply.The original factory has stopped after-sales maintenance. My plan is to use ordinary LEDs (chips) to replace each film, then make a PCB, install the LEDs on the PCB, and use them to replace the original display. The center will use the most easily available 8-bit digital tube to replace the original display. I don't know if my idea is feasible. If you have a better idea, I look forward to your help, thank you |
| daisizhou:
I don't know if this connection is possible, it looks like HVout and BPout are high voltages, I don't know if it's possible to connect a light-emitting LED here |
| MathWizard:
IDK the circuit, but for the chip it says it's 'a low-voltage serial to high-voltage parallel converter'. The output voltage is upto 80V in this datasheet. Yeah so that be a huge amount to drop just with resistors to some single LED. IDK about chip LED's or how many LED's could be put in series. If the HV was only 15V, then you could probably use some logic IC like a level-shifter to get back to the 5 or 12V you might have wanted to use for regular LED's. Any idea if the chip's have a problem? IDK about digital luminous film, what about getting more of that? |
| daisizhou:
--- Quote from: MathWizard on August 17, 2024, 06:34:09 pm ---IDK the circuit, but for the chip it says it's 'a low-voltage serial to high-voltage parallel converter'. The output voltage is upto 80V in this datasheet. Yeah so that be a huge amount to drop just with resistors to some single LED. IDK about chip LED's or how many LED's could be put in series. If the HV was only 15V, then you could probably use some logic IC like a level-shifter to get back to the 5 or 12V you might have wanted to use for regular LED's. Any idea if the chip's have a problem? IDK about digital luminous film, what about getting more of that? --- End quote --- This is the first time I have come across this type of display.It looks like a monochrome LCD screen, but on top of a plastic film. In the picture below, you can vaguely see that only part of the LCD display is normal.This means the chip is functioning normally. There is a 3-core flat wire in the lower right corner. I guess it may be connected to high voltage, similar to the backlight. |
| oPossum:
May be an EL display https://en.wikipedia.org/wiki/Electroluminescent_display Check the high voltage power supply. Should be about 100 volts. The display itself may be in serviceable condition. |
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