Table of contents(14)+
- 01The 30-Second Test: Phone Orientation or TV Setting?
- 02Method 1: Rotate Your Phone to Match the TV's Orientation
- 03Method 2: Change Your TV's Picture or Zoom Mode
- 04Method 3: Use a Casting App Instead of Mirroring for Video
- 05Method 4: Check Your Phone's Display-Fit Setting
- 06Method 5: Turn Off Overscan if You're Mirroring Over a Cable
- 07Mirroring vs. Casting: Which Fills the Screen?
- 08Frequently Asked Questions
- 09Why does screen mirroring show black bars on my TV?
- 10Does rotating my phone fix full-screen mirroring?
- 11Can I stretch the picture to fill the whole TV screen?
- 12Why is my Hisense TV not full screen when mirroring?
- 13Is casting better than mirroring for full-screen video?
- 14Related Guides
In practice, this gap shows up most on VIDAA-based Hisense TVs in the U6 to U9 range. It also shows up on Android TV models like the H9 and H10 series. Their panels are a fixed 16:9 shape. A phone screen is usually taller and narrower. Mirroring copies that shape exactly. The picture lands in the middle of the TV, with black bars on both sides.
The 30-Second Test: Phone Orientation or TV Setting?
Before you touch any TV menu, run this quick check. It tells you which fix to try first.
- Start mirroring and look at the TV. If the picture is small and surrounded by black on all four sides, your phone is still in portrait mode.
- Rotate your phone to landscape. If the picture now fills most of the screen, orientation was the problem. Skip to Method 1 below.
- If black bars stay even in landscape, the issue is likely your TV's picture or zoom setting, not your phone. Skip to Method 2.
If you'd rather fix this from your TV's menu and can't find the physical remote, HiRemote turns your iPhone into a Hisense remote, so you can reach the picture settings without digging through drawers. It won't make mirroring itself full screen — that part is still on your phone and TV — but it gets you to the right menu fast.
Method 1: Rotate Your Phone to Match the TV's Orientation
This is the fastest fix, and it solves the problem most of the time. Screen mirroring sends your phone's exact screen shape to the TV. A portrait phone screen is tall and narrow. A TV screen is wide and short. Turn your phone sideways before or during mirroring, and the two shapes line up better. Most video apps rotate automatically once you tilt the phone. For Apple's own current steps on turning on screen mirroring, see Apple's AirPlay support hub.
When this won't work: some apps lock their video player to portrait, even when your phone is sideways. Others only rotate once playback starts, not on the home screen. If your mirrored picture still looks small after rotating, move on to Method 2.
Method 2: Change Your TV's Picture or Zoom Mode
Most smart TVs, including Hisense models, include a picture size or aspect ratio option somewhere in the display settings. The exact menu path and label vary by brand and model year. Open your TV's settings menu and look in the picture or display section for a zoom, wide, or fill choice. Cycling through the options there can stretch the mirrored image toward the edges.
When this won't work: stretching a portrait image to fill a 16:9 screen distorts faces and text. If the result looks warped, undo the change and rely on orientation instead.
Method 3: Use a Casting App Instead of Mirroring for Video
Mirroring and casting are not the same thing, even though people use the words interchangeably. Mirroring copies your entire phone screen, shape and all. Casting sends just the video file, and the TV's own app draws it at full screen in its native 16:9 player. If you only want to watch a show full screen, opening it directly in a casting-enabled app skips the aspect ratio problem completely.
For a full walkthrough of casting specifically to a Hisense TV, see our guide to casting on Hisense TVs. If you started with mirroring and want the full comparison, our iPhone-to-Hisense mirroring guide covers every method side by side. For the official list of apps that support casting, see Google's Chromecast help center.
When this won't work: casting only applies to apps that support it, and not every app does. For a presentation, a game, or a photo slideshow, mirroring is still your only option, and the aspect ratio limits in Methods 1 and 2 still apply.
If your Hisense TV runs the Roku platform, you can also check the picture settings right from a browser, without installing anything. Our free Roku TV web remote works from any device on the same Wi-Fi. For daily use, the HiRemote app (4.4 rating, 1,600+ App Store reviews) is faster and adds Apple Watch and widgets.
Method 4: Check Your Phone's Display-Fit Setting
Some Android phones add an extra setting for this inside their casting controls. It is sometimes labeled as a screen-fit or resolution option, though the exact wording depends on your phone's brand. Open your phone's casting menu while mirroring is active, and look there for a display size or resolution choice. Not every phone brand includes this option, so if you don't see it, your device simply does not offer it.
When this won't work: iPhones don't expose a manual fit setting for AirPlay mirroring. On iPhone, orientation and the TV's own zoom mode in Method 2 are your only two levers.
Method 5: Turn Off Overscan if You're Mirroring Over a Cable
If you connect your phone to the TV with a cable instead of Wi-Fi, an old overscan setting on the TV can crop or shrink the image. That leaves a border even when your phone sends a full 16:9 picture. Look in the TV's picture settings for an overscan or screen-fit toggle, and turn it off if you find one. This issue shows up more on older TVs than new ones.
When this won't work: newer TVs mostly auto-detect the correct scan setting and don't expose this toggle at all. If you don't find it, your TV probably doesn't need it, and the black bars are coming from Method 1 or 2 instead.
Mirroring vs. Casting: Which Fills the Screen?
| Method | Fills the TV screen? | Keeps sound | Works for any app |
|---|---|---|---|
| Mirroring (portrait phone) | No — black bars on the sides | Yes | Yes |
| Mirroring (landscape phone) | Usually, if the app rotates | Yes | Yes |
| Casting to a streaming app | Yes, in the app's own player | Yes | Only casting-enabled apps |
| TV zoom/stretch setting | Yes, but may distort the image | Yes | Yes |
Frequently Asked Questions
Why does screen mirroring show black bars on my TV?
Black bars appear because your phone's screen shape and your TV's screen shape don't match. Mirroring copies your phone's exact display, which is usually tall and narrow in portrait mode. A TV panel is a fixed 16:9 widescreen shape. The gap between the two shapes shows up as black space on the sides or top and bottom.
Does rotating my phone fix full-screen mirroring?
Yes, in most cases rotating your phone to landscape fixes it, since the shapes line up closer to the TV's own 16:9 panel. Some apps rotate their video player automatically once you tilt the phone. Others stay locked in portrait regardless of how you hold the phone, so you may still see thin bars even after rotating.
Can I stretch the picture to fill the whole TV screen?
Yes, most TVs include a zoom, wide, or stretch option in the picture or display settings that fills the screen edge to edge. The trade-off is distortion — stretching a portrait image to a 16:9 frame can make faces and text look wider or shorter than normal. Use it for games or menus more than for faces on screen.
Why is my Hisense TV not full screen when mirroring?
Your Hisense TV is likely displaying mirrored content at your phone's native aspect ratio, which is common on VIDAA, Roku, and Android TV models alike. Check the picture or aspect ratio setting in your TV's menu first. If you can't locate your physical remote to open that menu, a phone-based remote app can get you there without searching the couch.
Is casting better than mirroring for full-screen video?
Yes, casting is usually better for full-screen video, because the TV's own app renders the video natively instead of copying your phone's screen shape. Mirroring is still necessary for content that has no casting support, like most games, presentations, or photo apps. Pick casting when the app supports it, and mirroring everywhere else.
