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HDMI to LVDS Conversion Options
I was wondering if TI has anything to offer for a HDMI to LVDS solution? I must admit I am not very familiar with the high speed interface lineup, but looking through the parts I did not see anything that would perform this particular function directly, though it looks like it may be possible with unencrypted video with a pair of devices (i.e. DVI receiver coupled to a LVDS transmitter).
In any case I was wondering what the best solution TI has to offer for this would be if there is anything practical, and if this is the proper place to ask, thank you for your help.
There is not a one chip solution, will 2 chip solution work?
Hello Ajinder Singh,
I am interested in this solution you may have. Could you please specify which ic's are used and if there is some sort of application note that covers such a converter?
I am the business development manager for this product area. We currently do not have anything that will support an HDMI(TM) to LVDS link but I am not sure this is needed. HDMI(TM) contains audio but LVDS does not. Do you really need a TMDS(TM) to LVDS translator, DVI --> LVDS? We could provide a two chip solution for this application if audio is not involved. The TFP401A or TFP403 DVI recievers hooked up to the SN75LVDS83B FlatLink(TM) transmitter might work depending on the application. We need to understand what the pixel clock need is for us to determine that we have a potential solution. Fill free to contact me at email@example.com.
We have an application where we need to convert the HDMI to LVDS (video only no audio). Can I use TFP401A or TFP403 and SN75LVDS83B as the HDMI to LVDS receiver. Is there better solution from TI for single port HDMI.
Thanks n regards
This is our best solution for this application. We need to understand the pixel clock, bits per color, and refresh rate in order to determine whether this solution has the bandwidth needed. Once these are known we can have you discuss this with an applicaiton engineer for support.
Wow, glad I ran across these boards, I'm looking to work on a CE class project and decided to do something I wanted to do for myself while I'm at it. Scouring the net finding no useful information until these posts. I'm looking for a solution of what you've stated just before... I want to take DVI(from external graphics card) input and convert to LVDS(LCD laptop screen). Basically I want to take my Lenovo W510 notebook, attach an external desktop graphics card via PCIe ExpressCard expansion board (if TI also has components to make this I would be very much interested also but I plan on just buying a ViDoc), then using the output from that graphics card hook it back up to the notebook's LCD screen and not utilizing the onboard graphics card.
Does this make sense? And more importantly does TI have all the components to make such a thing happen assuming I know the specifications of my LCD and such. I can get some help afterwards if I am pointed in the right direction as far as components. Number of components is not an issue, being bulky isn't a problem, as it is going to be a bulky prototype.
Thanks in advance,
I am a project trainee and i need to design a HDMI to composite convereter.I went through your post and found out that TI has a solution for
DVI to LVDS conversion.Well the HDMI to DVI conversion is possible via a cable but I don't know whether a LVDS signal will be compatible with
a LCD or not.If not , then please suggest me a LVDS to composite conversion circuit. Moreover do give the circuit and the components required for
a DVI to LVDS conversion.
Saptarshi dutta chowdhury
I need to understand the application in order to understand your need. Are you trying to drive a panel or a monitor?
The components needed depend upon the answers above.
Please provide your email address so that I can put in contact with our application team.
I actually want to design a HDMI to component converter.I got a suggested solution for this.Do tell me whether this will work or not.
HDMI -----------------DVI---------------TFP401--------------- IP00C725 ------------------------THS8135--------------------------NTSC(Component)
(via cable) (DVI Receiver) (Down scaler from IChips) (Video DAC)
I went through the datasheets of TFP401 and THS8135 but couldnot get the same for IP00C725.Do tell me if TI has any other alternatives for this IC.
Moreover TFP401 accepts DVI inputs and gives out 24 bits of even and odd RBG pixels( QE[0:23} and QO[0:23]) but THS8135 accepts 10 bits of
RBG/YCbCr inputs, then how to interface between this two without any loss of data.
In addition to this if i directly want to connect the output of THS8135 to a TV then from where I will get the SYNC signal as there is no
HSYNC and VSYNC coming out from DAC.
Please help me out. I will soon be posting about the specifications that you want to know.
I am away for the office until Tuesday of next week. We save asked our application engineer to respond to this message. Undrea will either post here or contact you directly via the email provided above. This may take a couple of days as we research the THS device. We do not have any information on the IP00C725. Here are some questions that may help though.
I have got several NEC LCD panels (1024x768) having 20 pins LVDS connector. It was originally used with C&T 6550 PCI to LVDS convertor add-on card to be mounted on old Intel Pentium compatible Motherboard during those time when on board VGA right on motherboards were not available. Most of them, we have purchased many years back for Embedded PC solutions at astonishing price of 1000 US$/ piece. It was no of use to us until latest motherboard started to come with direct DVI or HDMI port built right on motherboard. Most of current LCD monitor I have seen is coming with 30 pins LVDS connector may be because of 1280 x 768 size resolution.
Can I convert these DVI or HDMI to drive my 20 pins LVDS LCD panels?
Thanks in advance with regards,
If using the TFP401 to the THS8135, the two LSBs would be dropped. The THS8135 generates the sync signals internally with one external sync provided along with the clock (From the TFP401). The sync levels are carried in the outputs of the DAC. The THS8135 datasheet and EVM guide have additional details (http://focus.ti.com/lit/ug/sleu109/sleu109.pdf).
Will TI be able to provide me with the schematic connections along with all the passive components required for TFP401A.
Is there any EVM for TF401A available.I need that desperately and how to interface it with a THS8135 EVM as the latter
takes a analog RGB input which is then internally converted into a digital RGB via TVP7002 then again back to an analog RGB output.
Please help me out if you can.
The TFP401A EVM is not available, we do have a TFP403/TFP410 EVM. These EVM's are basically DVI repeater boards, with no external probe points or access to the data signals out of the TFP403, only DE, HSYNC, VSYNC and ODCK are accessible.
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