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4.3" TFT LCD Composite Video display for the prop $25 — Parallax Forums

4.3" TFT LCD Composite Video display for the prop $25

Cluso99Cluso99 Posts: 18,069
edited 2011-05-03 05:06 in Propeller 1
LCD.JPG


I just received this 4.3{ TFT LCD car composite video display from eBay US$25 inc postage.

Attached is a pic generated by the prop and Chips graphics code. I used a TriBlade which has the standard TV 3 resistor network. The out of focus is mainly me, as it is pretty good although there is some red bleed. Perhaps I can adjust that out - I haven't tried.

I also tried potato tv text v12 which gave a fairly nice 40x25 color display. There was a little shimmering on the last text display with lots of colored text, but less than I recall on my real TV.

While the spec says its 1440x272 I doubt that it is 1440w. However as I said, its great for the price, and compact.
http://cgi.ebay.com.au/ws/eBayISAPI.dll?ViewItem&item=160564067335&ssPageName=STRK:MEWNX:IT
LCD.JPG
952 x 538 - 92K
LCD.JPG 92.3K

Comments

  • Dr_AculaDr_Acula Posts: 5,484
    edited 2011-05-02 01:10
    Nice find. On the 40x25 text, can you see individual pixels? Also can you reattach your photo - it seems to have fallen off.

    I might see if I can get me one of these!
  • Cluso99Cluso99 Posts: 18,069
    edited 2011-05-02 01:28
    Senior moment LOL. Pic attached to top post.

    I don't recall seeing the pixels. Later tonight I am going to try the digital tuner & video player on it :)

    Update: I just viewed our digital TV tuner (Standard Definition) and the pic is great. Maybe not quite as clear as out TV but tiny writing is fine. I don't expect any problems in seeing 80x25 text now.

    Now to see how much room there is inside LOL :)

    If the pcb was offset instead of centered then there would be some room for a thin long pcb. But with the current mounting that is not possible. A thin pcb with qfp prop could work although the xtal would be an issue. The smt sram I use is too thick.
  • AleAle Posts: 2,363
    edited 2011-05-02 01:50
    It is then probably 1440 individual pixels with 3 per color leaving 480 RGB pixels :)... and with analog input ? nice !
  • Dr_AculaDr_Acula Posts: 5,484
    edited 2011-05-02 02:32
    Cluso, you are not thinking of trying to get a propeller in that case, are you? *grin*
  • Cluso99Cluso99 Posts: 18,069
    edited 2011-05-02 03:04
    Drac: No, not A prop. Just an SMT TriBlade :)

    BTW I was thinking of taking a photo of RamBlade (1pin version) running CPM on that monitor with a PS2 keyboard. What would be wrong with that photo?

    Answer:
    The power supply for the monitor is the biggest as it is coming from an old PC (12V)
    The next biggest item is the keyboard
    Then comes the monitor 4.8"x2.8"
    And the smallest item, the computer... RamBlade pcb 1.2"x1.8" :)
  • TubularTubular Posts: 4,726
    edited 2011-05-02 03:13
    Looks like a neat little package, Cluso.

    That size and resolution is commonly referred to as the "PSP" screen I believe. 480 x 272. At that size they are generally well priced but viewing angle and brightness varies.
  • RaymanRayman Posts: 14,992
    edited 2011-05-02 03:21
    Very nice. I'd like to open one up to see what kind of chips they use to convert the analog NTSC signal into LCD control signals...
  • WBA ConsultingWBA Consulting Posts: 2,936
    edited 2011-05-02 10:57
    Very nice little display. Might use one of these for a setup I am designing for a 1972 Ford Bronco (corner cameras and engine monitoring for a rock crawler). Nice to see that they include a couple extra "safety tubes". You never can have too many of those...... LOL
  • Cluso99Cluso99 Posts: 18,069
    edited 2011-05-02 20:24
    Ray: While there is quite a bit of logic, the main chip is a large qfp (maybe 100pin?) and has some form of itallic M on the chip. Just cannot recall all the details. I am a bit rushed at the mo' so will take it apart again later and take a photo - will be a few days at least as I am off interstate again.
  • Dr_AculaDr_Acula Posts: 5,484
    edited 2011-05-02 22:06
    Just bought one now.

    Re your mini computer,. The "power supply" could be batteries. How tight does the 12V regulation need to be - could you check if it runs on 11V say?
  • Cluso99Cluso99 Posts: 18,069
    edited 2011-05-03 02:00
    It was a ready 12V supply sitting on the floor :) It is designed to run off a car battery so I expect it will have quite a wide tolerance, certainly up to 13.6V anyway.
  • JRetSapDoogJRetSapDoog Posts: 954
    edited 2011-05-03 05:06
    I haven't used the above display, but I've used 3 different 7" composite (headrest) displays w/ Prop TV output:

    800x480 w/Realtek chip, 480x234 w/MStar chip and 480x234 w/Weltrend chip, all from Taiwan design houses.

    I've ran the latter 2 seemingly without issues at 9V (I've only tried 12V with the Realtek); however, the back lights won't come on once the voltage goes much below 9V. I supply power for both the Prop and the display from a 9V adapter, which makes for less of a voltage drop across the Prop's voltage regulator compared to a 12V adapter.
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