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Questions tagged [backlight]

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2answers
60 views

LCD Backlight Control Circuit

I'm trying to control the back-light of a TC1602A-09T 16X2 Character LCD by using an output pin on a Teensy 3.2 microcontroller. This is the circuit I have at the moment: The LED- pin would be ...
0
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1answer
145 views

Is the voltage supplied by an LCD backlight inverter in a laptop dangerous in any way?

It is my understanding that in a laptop, voltage from a low voltage (say 10V) battery can be converted into higher much higher voltages by way of inverter for an LCD display module. Is this voltage ...
0
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2answers
116 views

Laptop keyboard backlight ribbon cable broken [closed]

I've accidentally broke my laptop keyboard backlight ribbon cable when disassembling my laptop. I want to solder it back by patching with copper wires or maybe copper plates. My question is, it is a ...
3
votes
1answer
45 views

LCD module with backlight

I am using COG-C144MVGI. I am trying to turn it on with my Raspberry Pi. I am not sure if I am following the "power on sequence" correctly. Does this kind of LCD modules work without backlight? I am ...
0
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1answer
53 views

Do cold cathode fluorescent lights (CCFLs) degrade as a function of idle time?

I have a HP LP2475w display with a cold cathode fluorescent light (CCFL) backlight. It is approximately 8 years old. However, it has only 9041 backlight hours, meaning it has been used for only 12.9% ...
0
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1answer
295 views

Backlight dimming Innolux at065tn14 with vs-ty2662-v1 (PCB800099) LCD driver board

I would like to dim an Innolux at065tn14 LCD backlight via an PWM signal generated by an arduino pro mini. The driver board has an pt4103 Step-Up Converter to drive the backlight of the LCD display. I'...
0
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2answers
82 views

Which things should I have in mind when choosing LED backlight frequency in range 10 kHz to 100 kHz?

So I have a display which has an integrated LED driver for backlight. The driver expects PWM input with frequency between 10 kHz and 100 kHz. The only other information I have are the maximum voltage ...
0
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1answer
86 views

LED strips for TV

My LCD back-light strip has broken (LEDs exploded) so I want to replace the LEDs. I measured the output of the wire that act as source for TV strip, it yields 35 V, so am asking if I can take the ...
0
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1answer
77 views

Driving LCDs with parallel LEDs in singles

I am implementing a LED driver for a LCD that has the particular arrangement of the backlight LEDs shown in the picture bellow, 4 parallel LEDs. It seems quite inconvenient not to have them in a ...
1
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1answer
642 views

LCD 16x2: circuit to adjust the LCD backlight by a PWM signal

I am testing a lcd 16x2 whith msp430g2553. I am controlling the backlight by PWM signal. I am using the P2.4 as output generating a PWM signal. I have connected the anode directly to pin P2.4 of the ...
0
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1answer
51 views

Switching backlight to RGB in the following monitor C24FG70

I have the following monitor: Samsung C24FG70. Is it possible to change the white led backlights with RGB leds? Possibly the smd APA102 with the following microcontroller: ESP8266. How could i hook ...
1
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1answer
451 views

Philips 26PF5321 backlight mod, dim backlight

Got this older Philips 26PF5321 LCD-TV, like it because it is not a smart-tv. What I dislike about this TV is the fixed backlight setting (cannot change it via software menu and there is no update ...
3
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2answers
533 views

Can't understand where backlight pins are in this LCD module

I have this LCD display: RC0802A-BIW-CSX It is supposed to have a backlight, but I can't understand where the backlight LED is since the connections are just 14 pin, and backlight is not mentioned. ...
-1
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1answer
59 views

Microwave lcd display works but lost color.instead numbers are now greyish. [closed]

Microwave is completely usable. And still goes to sleep to power save after some time. Problem is although display updates and works as it should...the values are now shown in a greyish color instead ...
1
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1answer
1k views

Vee negative voltage output LCD

I have a LCD i want to use for a project but still can't get it working on a breadboard. I have used LCD's before so I'm familiar with them, this one however has something i haven't seen before. ...
0
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3answers
241 views

Drive backlight LCD led

I need to drive LEDs in LCD backlighting. My LED are in this circuit: The backlight needs a current of 700 mA at 9 V. What driver should I use for control? According to the current peak calculation ...
1
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2answers
2k views

What is the purpose of the diodes on a Samsung LED TV backlight bar

Skip to the question below if you don't care about the details ;) The bottom half of the backlight in my TV went off so I opened it up to see if I could fix it. I found four of the 7 bars of LEDs ...
1
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1answer
49 views

Sensitive instrument 5 V needed

I need advice on powering a STN-display module. I am confused on getting the correct power source for the backlight. The backlight of old module (SP12N002) contained CCFL and new (SP12N01L6ALCZ) is ...
0
votes
1answer
267 views

TFT backlight control via GPIO

I need to control TFT backlight via single GPIO output from atxmega128a4u. The LCD backlight requires +3.0V, while the rest of my schematic runs on +3.3V. I do not have access to backlight ground pin,...