Timeline for LCD Brightness Control & LCD Datasheet Interpretation
Current License: CC BY-SA 4.0
3 events
| when toggle format | what | by | license | comment | |
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| Mar 9 at 19:37 | comment | added | Robin Iddon | 10v isn't enough to drive the backlight you included in your question. That aside 50% duty cycle will give you 50% current but the human eye might not perceive that as 'half as bright'. Quite often human responses are logarithmic not linear. | |
| Mar 8 at 21:44 | comment | added | user346278 | Thanks for the information! This has helped me connect a few dots. Just a few clarifying questions: - If I'm supplying 10V to the LCD backlight, if I want to have the brightest setting, I would set the series resistor to ~185 ohms (10V-7.8V)/12.0mA =~183 ohms. Then drive the transistor at 50% duty cycle via PWM to halve that brightness? | |
| Mar 8 at 20:02 | history | answered | Robin Iddon | CC BY-SA 4.0 |