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Toshiba 50L7300U Review: A 50-Inch LED HDTV With Wi-Fi

Results: Pixel Response And Input Lag

To perform these tests, we use a high-speed camera that shoots at 1000 frames per second. Analyzing the video frame-by-frame allows us to observe the exact time it takes to go from a zero-percent signal to a 100% white field.

The pattern generator is placed at the base of the monitor so our camera can capture the precise moment its front-panel LED lights up, indicating that a video signal is being received by the monitor. With this camera placement, we can easily see how long it takes to fully display a pattern after pressing the button on the generator’s remote. This testing methodology allows for accurate and repeatable results when comparing panels.

Here’s a shot of our test setup. Click on the photo to enlarge.

The brighter section of the camera’s screen is what actually appears in the video. You can see the lights of the pattern generator in the bottom of the viewfinder. We flash the pattern on and off five times and average the results.

Here’s the screen draw result.

The 50L7300U has a Game mode, which, as you’ll see below, is necessary. The screen draw time is the same regardless of picture mode. The 240 Hz refresh rate is responsible for that first-place finish. Remember that this is an IPS panel. The only faster screen we’ve tested is the Asus VG248Q, and that TN-based display completed our black-to-white test in only seven milliseconds.

Here is the lag result in the Game mode.

We'd call this a fair result among HDTVs, but it won’t match any computer monitor we’ve tested. And the other picture modes are even slower. In Movie, we recorded a total lag time of 135 ms. Of course, most gamers employing this display will use a console, which is limited to 60 Hz. While the 240 Hz refresh rate reduces motion blur and judder artifacts, players with speedy reaction times will find noticeable input lag in their gameplay.

  • cats_Paw
    A bit expensive. Give me a good plasma 50-60 inch, low input lag, no smart, wifi... maybe 3d and usb play, but even that not necesary for a low price and im sold (like maybe LG 50PN6500, althou most reviews say its not too good).Leds are a bit more pricey at 50 inch >D
    Reply
  • iam2thecrowe
    Toshiba have always made good stuff, i had a toshiba tv a while ago and it had a better picture and more picture adjustments than anything else on the market at the time.I fully disagree with the above about a plasma, regardless of input lag or whatever, the picture quality is total garbage with all the speckles, all plasmas have it.
    Reply
  • cgsample
    Does it "phone home" like LG?
    Reply
  • BigMack70
    dat PPI *shudder*
    Reply
  • toddybody
    Love Toms...truly.BUTWhy are they reviewing a Ho-Hum 1080p TV from Toshiba? Seems more up CNET's alley to review blase consumer tech. Tom's is special for it's in depth and technical reviews of less heralded techie gear (i.e., CPU/GPU/HDD/Special Peripherals/Technical Prototypes...etc) What Im really trying to say is, Where is Half Life 3 and nVidia Maxwell? :D
    Reply
  • cangelini
    Love Toms...truly.BUTWhy are they reviewing a Ho-Hum 1080p TV from Toshiba? Seems more up CNET's alley to review blase consumer tech. Tom's is special for it's in depth and technical reviews of less heralded techie gear (i.e., CPU/GPU/HDD/Special Peripherals/Technical Prototypes...etc) What Im really trying to say is, Where is Half Life 3 and nVidia Maxwell? :D
    Christian is writing Tom's Hardware-style display coverage for us, and doing a fantastic job applying the same deep-dive methodologies we use for other components to help quantify the strengths and weaknesses of monitors/TVs. Don't worry; you'll see us cover Maxwell when the embargo lifts on it ;) For Half-Life 3, you need to talk to Gabe.
    Reply
  • Nintendo Maniac 64
    Toms, could you please confirm/deny if you actually tested that the Movie preset was the best and didn't just assume it was like many people do? While it doesn't sound like the TV model you tested has this specific issue, it's definitely something to keep in mind that the "Movie" preset may not always provide the best picture. I own a Toshiba 39L1350U and the Movie preset reduces the contrast and black levels considerably. To quote myself from the following post I made on AVS Forum:
    http://www.avsforum.com/t/1477874/toshiba-l1350u-series-2013/30#post_23923173

    "Using the same settings on both Game and Movie, via OCD-levels of eye-balling I found that Game and/or PC modes (which look identical) have similar white levels with backlight @ 50 compared to Movie's backlight @ 68. By comparison Movie's backlight setting had to be set to 40 just to get black levels similar to Game and/or PC with backlight @ 50. And for reference,"Standard" seems to be about the same as Game and/or PC except that the backlight @ 42 seems to equal Game/PC's backlight @ 50."


    For reference, CNET seemed to have assumed that the the "Movie" preset was the best when reviewing the L2300U (which is the same as the L1350U but in a different color) and then went and criticized the TV for having poor contrast and black levels. I just want to make sure Tom's doesn't make the same mistake in the future.
    Reply
  • ceberle
    12613485 said:
    Toms, please do not just assume that the Movie preset is the best. I own a Toshiba 39L1350U and the Movie preset reduces the contrast and black levels considerably. To quote myself from the following AVS Forum thread post:
    http://www.avsforum.com/t/1477874/toshiba-l1350u-series-2013/30#post_23923173

    "Using the same settings on both Game and Movie, via OCD-levels of eye-balling I found that Game and/or PC modes (which look identical) have similar white levels with backlight @ 50 compared to Movie's backlight @ 68. By comparison Movie's backlight setting had to be set to 40 just to get black levels similar to Game and/or PC with backlight @ 50. And for reference,"Standard" seems to be about the same as Game and/or PC except that the backlight @ 42 seems to equal Game/PC's backlight @ 50."

    This also means that your calibration settings are most likely incorrect for Game mode.

    It's important to note that CNET made the same mistake by calibrating via the "Movie" preset when reviewing the L2300U (which is the same as the L1350U but in a different color) and then went and criticized the TV for having poor contrast and black levels.

    We did not assume that Movie mode produced the best contrast, we measured every mode to determine which was the best starting point for calibration. Our black level measurements take into account the full rendering of detail down to the lowest brightness steps. It's easy to drop the brightness control and measure a better black level but detail will be crushed. In the game mode, we couldn't get any better black levels than movie when you take detail into account. Check out the article where we talk about the use of dynamic contrast. That will give you a pretty good idea where the balance is between contrast and detail. Remember also that Game mode does not have the accurate color gamut or flat grayscale and gamma tracking possible in Movie.

    When referring to forum posts, a statement like "via OCD-levels of eye-balling" means that the writer is expressing an opinion, not facts arrived at by science. We suggest taking information like that with a grain of salt.

    And yes, our calibration settings would be incorrect in Game mode.

    -Christian-

    Reply
  • Nintendo Maniac 64
    We did not assume that Movie mode produced the best contrast
    Could you please read the edit I made to that post? I attempted to remove (or at least greatly reduce) any accusatory wording I may have used.

    When referring to forum posts, a statement like "via OCD-levels of eye-balling" means that the writer is expressing an opinion, not facts arrived at by science. We suggest taking information like that with a grain of salt.
    I stated that I was quoting and linking to a post I made myself; if look at the user name of said AVS Forum post you would see that it is my own. Therefore I don't exactly appreciate it when you say that my results have no scientific merit and are purely an opinion...not all of us can afford multi-hundred dollar calibration tools just to provide exact numbers on what we're seeing. (for reference, I was not even the person that insisted on buying the TV, I would have been fine without one)
    Reply
  • n3cw4rr10r
    I want to see a review on the Vizio 4K TVs :)
    Reply