Need help to identify this LCD panel?

[nty]

Hi,

I have a LCD panel from surplus store. It is a SHARP LQ10PX22 TFT LCD. Could you educate me about this LCD. Is this an analog or digital panel and if possible show me where I could find its data sheet. It also connect to a LVDS receiver PCB and comes with the LVDS driver PCB. My goal is to use this for a DIY projector TV project.

Thanks in advance!

nty

 

[mhelin]

You paid how much for it? Anyway, usually those Sharp panels come with response time of 60 ms (20 rise + 40 decay), see
here for examples.

NEC's got some panels with low enough rt and 24-bit color but those are pretty expensive.

 

[mhelin]

I don't get it why people are buying crap panels when there are excellent and less expensive available. BenQ FP557s or 567s with Au Optronic's 16 ms panel is easy to use. It's 15" panel with XGA (1024x768) resolution, but you don't have to use the whole area of it. With proper software (on PC) you can use just a 12" diagonal area of it (or 800x600) or even less (like native DVD resolution 720:576 PAL). If you build the projector just large enough (the panel fits in) you can make it quite small (about 12" x 10" or little bit more). Fitting the controller inside may be difficult but it can be done for sure.

 

[nty]

LVDS?

Hi mhelin,

Thanks for the response. So my lcd panel is not good for this project due to higher rt time. I guess what you meant the pictures will be sluggish, please correct me if I am wrong. Even though I made a wrong decison to buy this lcd like some of the newbies, at least I have some good people like you to educate me in this area. Thanks! Next time I will ask first before any purchasing decision is made.

Next question, could you or other experts can tell me more about the LVDS? I have a LVDS driver and receiver PCB that connected to this LCD, they are in good working condition. The driver has two slots, one for a graphic card and the other unknow. The LVDS are ploycom products.

Thanks!

nty

 

[mhelin]

You better first try the LCD so you see, I didn't found the specifications for your LCD. Before you buy, you should know the response time (Rt) which is the sum of rise and decay times. Rt should be <25 ms or as low as possible. Current LCD monitors have as low as 16 ms Rt. Another thing is the contrast of the panel, this should be > 300:1, again BenQ FP567s have contrast ratio of ~500:1. Third important factor is the number of colors. Ideally you should have 16.7 million colors *without dithering*. Some panels use dithering to increase the number of colors from 262000 to 16 million using this technique which also makes moving action blurry just like the too slow response time.

Response time explained here .

LVDS interface seems to became popular, though afaik there are no standards except manufacturers' on it. So all LVDS are not compatible. With 8-bit LVDS you can have the full colors (24 bit), with 6-bit the 262k colors (18 bit). Both are OK. Single channel LVDS supports upto 1024x768 resolution (XGA). For SXGA you need 2-channel LVDS.

Does you LVDS board have VGA input or is it just an interface to panel's parallel TTL input? Anyway, www.dr-berghaus.de does have a AGP LVDS card with ATI Rage chipset and are coming with the ATI Mobility Radeon version later this year (dFlat-AGP-1 ).

This 15" LCD panel have good specs but may be too large for your needs.

This 6.3" Toshiba does have 100 ms Rt (tON+tOFF), no good.

Buy this LCD if you can afford! This is the famous 6.3" NEC NL1027BC12-02 with XGA resolution, 500:1 contrast, 16.2 million color and 21 ms Rt (6 ms tON, 15 ms tOFF). It's got 1-channel 8-bit LVDS interface. Price about $750.

 

[mhelin]

Color resolution

Seems that panels that can show 16.2 million colors actually have 262144 colors but use dithering, where as panels that can show 16.7 million colors = 2^24 do it properly without dithering.