LG

LG OLED77C55LA 77-Inch 4K OLED TV

A 77 inch C-series OLED on webOS, the big-screen pick for film fans and gamers who want perfect blacks at cinema scale without going full flagship.

75/100
Very good
Overall score · how we rate
77 inch OLED120HzwebOSBrightness Boosterα9 AI processorDolby Atmos
£2,199best price at Amazon
In stock at 1 retailer

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Why we rate it

  • OLED contrast at 77 inches
  • Brightness Booster
  • α9 processing and webOS
  • 120Hz for gaming
  • You need the space
  • OLED brightness in daylight
Score profile

Where the LG OLED77C55LA 77-Inch 4K OLED TV wins and loses

Scored against the tvs class
PictureGamingSmartScaleBrightness9288869080
Picture quality
92
Gaming
88
Smart features
86
Scale and impact
90
Brightness
80
Full specification

Specifications

Grouped · supported features marked in blue

Panel

Size77 "
Panel typeOLED
Resolution4
Refresh rate120 Hz

Audio

Dolby AtmosYes

Platform and apps

Smart TV OSwebOS

Watch it in action

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Head to head

LG OLED77C55LA 77-Inch 4K OLED TV vs Samsung Samsung 83-inch S99H OLED

Highlighted cell = better in that row
PictureGamingSmartScaleBrightness
LG OLED77C55LA 77-Inch 4K OLED TVSamsung 83-inch S99H OLED
 LGLG OLED77C55LA 77-Inch 4K OLED TVThis pageSamsungSamsung 83-inch S99H OLED
Overall score75 /10075 /100
Size77 "83 "
Panel typeOLEDOLED
Refresh120 Hz165 HzBetter
Who it's for

Is the LG OLED77C55LA 77-Inch 4K OLED TV right for you?

Buy it if
Large-room film fans

If you have the space and want cinema-scale OLED with perfect blacks, strong gaming and a polished platform, the 77 inch C-series is a superb home-cinema centrepiece.

Skip it if
Smaller rooms and bright spaces

If your room cannot offer a long viewing distance, or it is very bright, a smaller OLED or a high-brightness Mini-LED will suit the space better.

Large-room cinephile
Has the space and wants cinema-scale OLED with reference film picture.
excellent
Big-screen gamer
Wants 120Hz gaming on a huge panel with LG's strong feature set.
good
Design-led buyer
Wants a slim, premium-looking statement screen as much as the picture.
okay
Small-room buyer
Has a standard living room with a short viewing distance.
skip
Common questions

Before you buy

How big a room do I need for the LG OLED77C55LA?

A 77 inch screen suits rooms where you can sit roughly three metres or more back. In a smaller room it can feel overwhelming and you will sit too close.

Is it good for gaming?

Yes. It has a 120Hz panel and LG's C-series is known for a strong gaming feature set, so it suits PS5 and Series X play well.

How bright is it compared with a Mini-LED?

Brightness Booster lifts it above older OLEDs, but a top Mini-LED still goes brighter, so in a very sunny room an LCD can be more practical.

Do I need to worry about burn-in?

Modern OLEDs include protections, but long periods of static logos or HUDs remain a long-term consideration, so vary your content where you can.