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will
 will
Active Member
Joined: 2 weeks  ago
Posts: 5
02/01/2017 4:51 pm  

Hello here !

I am starting the same project based on a GBzero of a friend. 

By searching about PSP possibilities I found this blog with so much good info !

About the LCD resolution, I am in doubt on the fact we can found 640x480 LCD like in this  https://www.alibaba.com/product-detail/car-roof-mount-lcd-monitor-composite_60548603109.html?spm=a2700.7724838.0.0.xqo2oC

But for this kind of LCD I also see that the resolution is 480x272 or 480x234 like in the last picture of my link...

Does someone have explored the LCD market deeply enough to clarify what is really available ?

Thanks for your help. 

 

 


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othermod
Eminent Member
Joined: 4 months  ago
Posts: 38
02/01/2017 5:05 pm  

Thank you for checking out my site.

I've purchased these from many different sellers, and so far all of them have been 480x272. I do have a favorite, this one here. It runs more efficiently than most and has a better image quality. There are a few panels that do higher resolutions, but most of them either don't come with the drivers or the drivers are too large to use in projects.

Maybe someone else out there has purchased a 4.3" and received a different resolution. I've had to put the LCD research on the side for the last couple months while I finish the all-in-one board. 


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will
 will
Active Member
Joined: 2 weeks  ago
Posts: 5
03/01/2017 9:08 am  

Hi ! 

Finaly I see this driver that could be a nice option to improve image quality level :  https://www.aliexpress.com/store/product/HDMI-TTL-little-Driver-Board-test-Board-PCB800168-HDMI-input-50pin-TTL-output-tn90-tn92-tn94/1264367_32387766346.html

(I am affraid of the potential result of having a screen resolution not equal to what is provided by composent controler in NTSC).

Do you have the pinout of the connector between LCD panel and driver board ?

I will see if the board could be optimized in term of size if I have some time to explore deeper the datasheet of the RTD2660H. It may be possible to integrate it to your all-in-one board in a next version...

What are the screens that you found with higher resolution but too large driver ? 

 

 

 


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will
 will
Active Member
Joined: 2 weeks  ago
Posts: 5
04/01/2017 8:25 am  

Hello 

Could someone told me the dimension of the original LCD screen and also the maximum thickness that could fit the PSP case ?

Thanks.


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will
 will
Active Member
Joined: 2 weeks  ago
Posts: 5
04/01/2017 10:21 am  

Hello, 

I will leave messages here as a collection of data 🙂

The original PSP 1000 LCD is a Sharp LQ043T1DG03 : Datasheet could be found by googling it.

Possible replacement LCD could be Innolux AT043TN13 or 24 or 25 coupled to a little driver board called PCB-800168 and found on Ebay for 25$.

I think this driver board is interresting because of its thickness and the fact that RTD266x could be added directly to the "all-in-one" board in order to have more free space in a PSP 2000 or 3000 project. 

I need to verify it deeply but may be that original PSP LCD could be addapted to this driver board by changing the 50pins FPC pinout.


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othermod
Eminent Member
Joined: 4 months  ago
Posts: 38
04/01/2017 10:33 am  

There are definitely many options. I purchased one of the HDMI boards and it has a similar driver. There is also this:

http://www.ebay.com/itm/Raspberry-pi-4-3-inch-touchscreen-HDMI-LCD-more-smarter-than-5inch-and-7-inch-/331916611953?hash=item4d47c59171:g:-qIAAOSw-YVXkx6O

The board is too large for most projects, but the components don't take up much space. A long-term goal of mine is to integrate the driver onto the all-in-one, and this is probably my favorite at the moment.


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will
 will
Active Member
Joined: 2 weeks  ago
Posts: 5
04/01/2017 5:30 pm  

I saw also the TFP401 but it seems to be a bit more expensive. 

Adafruit have made a driver board not so large (2 x 2.6") that I look for before Realtek one.

 


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othermod
Eminent Member
Joined: 4 months  ago
Posts: 38
04/01/2017 11:22 pm  

A little more, maybe an extra dollar or so.

I found this on aliexpress.

The LCD driver area is one where I would prefer to build from someone else's work, and be able to incorporate a schematic that has already been made and tested. I say this because I could easily spend months researching design rules for the wire routing and power circuits on these chips. That's time I won't have for a while.

There is also the programming that's required, so I would need to use a well-documented chip.

Hopefully more people can collaborate on this part.


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