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Messages - Paul_B

Pages: 1 ... 16 17 [18] 19
256
Hello,

Transmissive:

An LCD screen that uses a backlight. Transmissive LCDs are widely used in portable computers and provide excellent viewing indoors. They must be used outdoors in the shade because direct sunlight overwhelms the backlight, making viewing difficult, if not impossible.

Reflective:

A reflective LCD uses the ambient light in the vicinity. The light passes through the LCD layer to a mirror, which reflects it back to the viewer. Reflective LCDs are the least costly, but require bright light. Viewing is difficult in dark rooms or outside at night. Reflective LCDs can also be built with frontlights, which significantly improve the viewing in dimly lit environments.

Transflective:

A transflective LCD uses both transmissive and reflective methods. It uses a backlight as does transmissive, but also adds a reflective mirror that lets light pass through from the back.

Transflective LCDs are a compromise that allows users to obtain better viewing under both lighting conditions. However, because the mirror is built to let through backlight as well as reflect frontlight, it cannot do both equally as well as mirrors dedicated to one purpose. As a result, transflective LCDs are typically not quite as bright indoors as transmissive units and not as bright outdoors as reflective ones.


Even though transflective appears to be the best method, it may not be the best for you. You need to consider your applications specific needs. For your application you can use either a reflective or a transflective LCD.

Hope this helps!

257
TFTs / Re: NHD-5.0-800480TF-ATXL#-CTP backlight Driver
« on: February 11, 2015, 07:49:17 AM »
Hello,

We do not have a specific part number for driving the backlight, if you search on Mouser for "LED Lighting Drivers" you will find what you are looking for.

Please see the link below:

http://www.mouser.com/ProductDetail/Fairchild-Semiconductor/FAN5333BSX/?qs=7b5JlGc8jUgG8nkhKPwSvQ%3D%3D

Hope this helps!

258
OLEDs / Re: 0420CW-AB3 I2C Talking, Display is off and low current drawn
« on: February 10, 2015, 07:39:49 AM »
No problem, enjoy your display!

259
OLEDs / Re: Need help/wisdom using the new NHD-0420CW-xxx
« on: February 10, 2015, 07:38:06 AM »
No problem George, happy coding!

260
OLEDs / Re: 0420CW-AB3 I2C Talking, Display is off and low current drawn
« on: February 09, 2015, 02:05:33 PM »
Hello,

It is definitely possible that you may have damaged the display, however lets first rule out user error.


Can you please answer the following questions:

What value pull-up resistors are you using?

When using VDD is REGVDD grounded?

Does your initialization sequence match with what is listed in the datasheet.

Finally, if possible can you please upload your code.

Thanks!


261
TFTs / Re: nhd-ffc20-1
« on: February 09, 2015, 09:17:50 AM »
Hello,

Welcome to the forum! To answer your question the pin description of the TFT and controller board can be seen on page 4 of the datasheet.

http://www.newhavendisplay.com/specs/NHD-7.0-800480EF-20%20Controller%20Board.pdf

Regarding the pin numbering please see the mechanical drawing, listed on page 3.

Finally both FFC connectors on the controller board are Top Contact, meaning the pins on the FFC /FPC cable face up.

Hope this helps!


262
OLEDs / Re: Need help/wisdom using the new NHD-0420CW-xxx
« on: February 09, 2015, 08:24:05 AM »
Hello George,

I actually have some example code I can share with you.  It is written for the Arduino Mega.  See below:

https://github.com/NewhavenDisplay/NHD_US2066-Arduino-Mega

Hope this helps and please keep me posted on your progress!

263
OLEDs / Re: NHD-0420DZW 8-bit interface
« on: February 03, 2015, 07:39:54 AM »
No problem, enjoy your OLED!

264
OLEDs / Re: NHD-0420DZW 8-bit interface
« on: February 02, 2015, 02:46:16 PM »
Hello,

The example code provided is 100% verified to work. Please double check your wiring and if possible check your control signals with an oscilloscope, see page 11 in the displays datasheet.

http://www.newhavendisplay.com/specs/NHD-0420DZW-AY5.pdf

Can you also please list your full code. e.g. Initialization sequence

Thanks!


265
TFTs / Re: NHD-5.0-800480TFT-ATXI#CTP TOUCH problem
« on: January 06, 2015, 08:58:05 AM »
Hello,

You're welcome!  Thank you for sharing your issue & solution!

266
OLEDs / Re: NHD-042ODZW-AY5 Jumpers for Serial Interface
« on: December 18, 2014, 02:01:21 PM »
Hello,

Question:

1. When the spec sheet calls for an "OPEN" jumper, do I need to unsolder the factory installed surface mount resister and remove it from the board entirely?

Answer: Yes, you will need to unsolder the surface mount resister and remove it from the board entirely.



Question:

2. When the spec sheet calls for an "L" jumper, do I need to unsolder the factory installed surface mount resister and resolder it in a new position?

Answer: Yes, you will need to unsolder the surface mount resistor and shift it over. You will see 3 pads labeled H_PS_L.
H = High
L = Low

In your case position the resistor across PS and L.

Hope this helps!


P.S. Don't forget to check out the image I attached.

267
TFTs / Re: NHD-7.0-800480EF-20 Color Modes
« on: December 18, 2014, 07:57:13 AM »
Hello Tim,

NHD-7.0-800480EF-20 supports Up to 24-bit BGR. It can support any of the other SSD-1963 color modes.

Have a good one!

268
TFTs / Re: NHD-5.0-800480TF-ATXL#-T with the FT800 EVE GFX Engine
« on: December 04, 2014, 08:43:54 AM »
Hello,

PCLK is used to control panel refresh rate.
VSYNC is used to reset the LCD row pointer to top of the display.
HSYNC is used to reset the LCD column pointer to the edge of the display.

Regarding the PCLK, adjusting these values should not affect the H/VSync, H/V*-Porch values.


If you would like to learn more about LCD signal interface and timing parameters I highly recommend reading through this power-point:

Link:  http://www.nxp.com/wcm_documents/techzones/microcontrollers-techzone/Presentations/graphics.lcd.technologies.pdf


269
TFTs / Re: NHD-5.0-800480TF-ATXL#-T with the FT800 EVE GFX Engine
« on: December 02, 2014, 04:47:40 PM »
Hello,

Yes you can, however the values attached are verified to work.

Good luck!

270
TFTs / Re: NHD-5.0-800480TF-ATXL#-T with the FT800 EVE GFX Engine
« on: December 02, 2014, 12:08:31 PM »
Hello,

Iím sorry, unfortunately I am not familiar with the FT800 gfx engine. However, I am more then happy to help out with your timing issues!

To figure out the required timing parameters open up the NHD-5.0-800480TF-ATXL#-T datasheet (Page 6) or HX8264-D02 datasheet (Page 55)

Link: http://www.newhavendisplay.com/specs/NHD-5.0-800480TF-ATXL-T.pdf
Link: http://www.orientdisplay.com/pdf/HX8264-D02.pdf



The code snip-it below is an example of how your timing parameters should be set up on the NHD-5.0-800480TF-ATXL#-T display.

Code: [Select]
Linux Example:

display-timings {
+ native-mode = <&timing0>;
+ /* Settings for NHD-5.0-800480TF-ATXL#-T: */
+ timing0: 800x480 {
+ clock-frequency = <30000000>;
+ hactive         = <800>;
+ vactive         = <480>;
+ hback-porch     = <40>;
+ hfront-porch    = <40>;
+ hsync-len       = <48>;
+ vback-porch     = <29>;
+ vfront-porch    = <13>;
+ vsync-len       = <3>;
+ hsync-active = <0>;
+ vsync-active = <0>;
+ };


Hope this helps!










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