Best For
The LG OLED55C56LA and LG OLED55C56LB are closely matched 55-inch OLED TVs built around LG's latest α9 AI Processor 4K Gen8 platform. Both offer stunning OLED contrast, Dolby Vision, Dolby Atmos, HDMI 2.1 connectivity, 4K 120Hz gaming, and WebOS 25 smart features. For most buyers, picture quality and everyday performance will feel nearly identical. However, the OLED55C56LB adds a few refinements, including a dedicated security update commitment through 2029, a CI slot in select regions, and slightly broader feature documentation for refresh rate and connectivity. The differences are small, but they can matter depending on your long-term usage needs.
Verdict
Both TVs deliver premium OLED picture quality and excellent gaming performance, making either a strong choice. The LG OLED55C56LB edges ahead thanks to its documented security support until 2029, CI slot availability, and clearer support for VRR up to 144Hz. If pricing is similar, the OLED55C56LB is the safer long-term purchase. The OLED55C56LA remains an excellent alternative if available at a noticeably lower price.
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| Model No |
OLED55C56LA |
OLED55C56LB |
| TV Type |
Smart TV |
Smart TV |
| Screen Size |
55 Inch (139 cm) |
55 Inch (139 cm) |
| Resolution |
4K 3840 x 2160 |
4K 3840 x 2160 |
| Aspect Ratio |
16:9 |
16:9 |
| Motion Rate |
120 Hz |
120 Hz |
| Viewing Angle |
178°/178° |
178°/178° |
| USB |
| USB Version |
: 2.0 |
| Supported Audio Formats |
: MP3, AC4, AC3, EAC3, AAC, MP2, PCM, WMA |
| Supported Video Formats |
: MKV, DivX, MP4, AVI, ASF, MOV, FLV |
| Supported Picture Formats |
: JPEG, PNG, BMP, WebP, JPS, MPO |
|
| USB Version |
: 2.0 |
| Supported Audio Formats |
: MP3, AC4, AC3, EAC3, AAC, MP2, PCM, WMA |
| Supported Video Formats |
: MKV, DivX, MP4, AVI, ASF, MOV, FLV |
| Supported Picture Formats |
: JPEG, PNG, BMP |
|
| Video |
| Backlight |
: 4K UHD OLED |
| HLG |
: Yes |
| HDR10 |
: Yes |
| Dolby Vision |
: Yes |
| AI Picture Pro |
: Yes |
| Auto Calibration |
: Yes |
| Filmmaker Mode ™ |
: Yes |
| AI Brightness Control |
: Yes |
| Quick Media Switching ( QMS ) |
: Yes |
| OLED Dynamic Tone Mapping Pro |
: Yes |
| Wide Color Gamut |
: OLED Color |
| Motion |
: OLED Motion |
| Dimming Technology |
: Pixel Dimming |
| AI Genre Selection |
: Yes ( SDR, HDR ) |
| High Frame Rate ( HFR ) |
: 4K 120 Fps ( HDMI, USB ) |
| Picture Processor |
: α9 AI Processor 4K Gen8 |
| AI Upscaling |
: α9 AI Super Upscaling 4K |
| Picture Mode |
: 10 Modes ( Personalized Picture Wizard, Vivid, Standard, Eco, Cinema, Sports, Game, Filmmaker, ( ISF ) Expert ( Bright Room ), ( ISF )Expert ( Dark Room )) |
|
| Backlight |
: 4K UHD OLED |
| HLG |
: Yes |
| HDR10 |
: Yes |
| Dolby Vision |
: Yes |
| AI Picture Pro |
: Yes |
| Filmmaker Mode™ |
: Yes |
| AI Brightness Control |
: Yes |
| Quick Media Switching ( QMS ) |
: Yes |
| LED Dynamic Tone Mapping Pro |
: Yes |
| Wide Color Gamut |
: OLED Colour |
| Motion |
: OLED Motion |
| Dimming Technology |
: Pixel Dimming |
| AI Genre Selection |
: Yes ( SDR / HDR ) |
| Picture Processor |
: α9 AI Processor 4K Gen8 |
| AI Upscaling |
: α9 AI Super Upscaling 4K |
| Refresh Rate |
: 120Hz Native ( VRR 144Hz ) |
| High Frame Rate ( HFR ) |
: 4K 120 Fps ( HDMI, RF, USB ) |
| Picture Mode |
: 10 Modes ( Personalized Picture Wizard, Vivid, Standard, Eco, Cinema, Sports, Game, Filmmaker, ( ISF ) Expert ( Bright Room ), ( ISF ) Expert ( Dark Room )) |
|
| Audio |
| Audio Output ( RMS ) |
: 40 W |
| Dolby Atmos |
: Yes |
| LG Sound Sync |
: Yes |
| WOW Orchestra |
: Yes |
| AI Acoustic Tuning |
: Yes |
| Sound Mode Share |
: Yes |
| Simultaneous Audio Output |
: Yes |
| Speaker Direction |
: Down Firing |
| Speaker System |
: 2.2 Channel |
| Bluetooth Surround Ready |
: Yes ( 2 Way Playback ) |
| WiSA Ready |
: Yes ( Up To 2.1 Channel ) |
| Clear Voice Pro |
: Yes ( AI Voice Remastering ) |
| AI Sound |
: α9 AI Sound Pro ( Virtual 11.1.2 Up-Mix ) |
| Audio Codec |
: AC4, AC3 ( Dolby Digital ), EAC3, HE-AAC, AAC, MP2, MP3, PCM, WMA, apt-X ( Refer To Manual ) |
|
| Audio Output ( RMS ) |
: 40 W |
| Dolby Atmos |
: Yes |
| LG Sound Sync |
: Yes |
| WOW Orchestra |
: Yes |
| AI Acoustic Tuning |
: Yes |
| Sound Mode Share |
: Yes |
| Simultaneous Audio Output |
: Yes |
| Speaker System |
: 2.2 Channel |
| Speaker Direction |
: Down Firing |
| Bluetooth Surround Ready |
: Yes ( 2 Way Playback ) |
| Clear Voice Pro |
: Yes ( AI Voice Remastering ) |
| AI Sound |
: α9 AI Sound Pro ( Virtual 11.1.2 Up-Mix ) |
| Audio Codec |
: AC4, AC3 ( Dolby Digital ), EAC3, HE-AAC, AAC, MP2, MP3, PCM, WMA, apt-X ( Refer To Manual ) |
|
| Connectivity Options |
| HDMI 2.1 |
: 4ea ( Supports 4K 120Hz, eARC, VRR, ALLM, QMS ( 4 Port )) |
| USB 2.0 |
: 3ea |
| Ethernet / LAN |
: 1ea |
| RF Input ( Antenna / Cable ) |
: 2ea |
| Optical Digital Audio Out ( SPDIF ) |
: 1ea |
| Wi-Fi 6 |
: Yes |
| Bluetooth 5.3 |
: Yes |
| Simplink ( HDMI CEC ) |
: Yes |
| HDMI Audio Return Channel |
: eARC ( HDMI 2 ) |
|
| HDMI 2.1 |
: 4ea ( Supports 4K 120Hz, eARC, VRR, ALLM, QMS ( 4 Port )) |
| USB 2.0 |
: 3ea |
| Ethernet / LAN |
: 1ea |
| RF Input ( Antenna / Cable ) |
: 2ea |
| Optical Digital Audio Out ( SPDIF ) |
: 1ea |
| Wi-Fi 6 |
: Yes |
| Bluetooth 5.3 |
: Yes |
| Simplink ( HDMI CEC ) |
: Yes |
| HDMI Audio Return Channel |
: eARC ( HDMI 2 ) |
| CI Slot |
: 1ea ( Except For UK,Ireland ) |
|
| Smart TV Features |
| Operating System |
: WebOS 25 Smart TV |
| Voice ID |
: Yes |
| Home Hub |
: Yes |
| AI Chatbot |
: Yes |
| Multi View |
: Yes |
| Google Cast |
: Yes |
| LG Channels |
: Yes |
| Always Ready |
: Yes |
| Full Web Browser |
: Yes |
| Google Home, Hub |
: Yes |
| USB Camera Compatible |
: Yes |
| Works With Apple Home |
: Yes |
| Hands-Free Voice Control |
: Yes |
| Works With Apple Airplay |
: Yes |
| Intelligent Voice Recognition |
: Yes |
| Magic Remote Control Built-In |
: Yes |
| Smartphone Remote App |
: Yes ( LG ThinQ ) |
|
| Operating System |
: WebOS 25 Smart TV |
| Voice ID |
: Yes |
| Multi View |
: Yes |
| Home Hub |
: Yes |
| AI Chatbot |
: Yes |
| Google Cast |
: Yes |
| LG Channels |
: Yes |
| Always Ready |
: Yes |
| Full Web Browser |
: Yes |
| Google Home, Hub |
: Yes |
| Works With Apple Home |
: Yes |
| USB Camera Compatible |
: Yes |
| Works With Apple Airplay |
: Yes |
| Hands-Free Voice Control |
: Yes |
| Intelligent Voice Recognition |
: Yes |
| Magic Remote Control |
: Built-In |
| The Security Update Is Supported Until |
: 31/12/2029 |
| Smartphone Remote App |
: Yes ( LG ThinQ ) |
|
| Other Features |
| Design |
: Ultra Slim Design |
| Gray Scale |
: Yes |
| Invert Colors |
: Yes |
| High Contrast |
: Yes |
| Analog TV Reception |
: Yes |
| Limited Warranty |
: 1 Year Parts & Labor |
| Digital TV Reception |
: DVB-T2/T ( Terrestrial ), DVB-C ( Cable ), DVB-S2/S ( Satellite ) |
|
| Design |
: Ultra Slim Design |
| Gray Scale |
: Yes |
| Invert Colors |
: Yes |
| High Contrast |
: Yes |
| Analog TV Reception |
: Yes |
| Digital TV Reception |
: DVB-T2/T ( Terrestrial ), DVB-C ( Cable ), DVB-S2/S ( Satellite ) |
|
| General Details |
| Power Supply |
: AC 100~240V 50-60Hz |
| Standby Power Consumption |
: Under 0.5 W |
| Energy Star Rating |
: 2 |
| Weight Without Stand |
: 14.1 Kg |
| Weight With Stand |
: 16.0 Kg |
| Packaging Weight |
: 21.3 Kg |
| VESA Mounting |
: 300 mm X 200 mm |
|
| Power Supply |
: AC 100~240V 50-60Hz |
| Power Consumption Standby |
: Under 0.5 W |
| Weight Without Stand |
: 14.1 Kg |
| Weight With Stand |
: 16.0 Kg |
| Packaging Weight |
: 21.3 Kg |
| VESA Mounting |
: 300 mm X 200 mm |
|
| Supplied Accessories |
| Remote Control |
: Magic Remote Control MR25 |
| Power Cable |
: Yes ( Attached ) |
|
| Remote Control |
: Magic Remote MR25GA, MR25GB ( UK, Italy ) |
| Power Cable |
: Yes ( TV Attached ) |
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Compare LG OLED55C56LA with:
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Compare LG OLED55C56LB with:
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Frequently Asked Questions
Which product is better for gaming?
Both TVs are excellent for gaming with HDMI 2.1, VRR, ALLM, FreeSync, and G-Sync support, but the OLED55C56LB has clearer support documentation for VRR up to 144Hz, giving it a slight advantage.
Does Product 1 support Dolby Atmos?
Yes, the LG OLED55C56LA supports Dolby Atmos and includes a 40W 2.2-channel speaker system with AI Sound Pro processing.
Is there any picture quality difference between the two TVs?
Picture quality is nearly identical since both models use OLED panels, Dolby Vision, HDR10, Pixel Dimming, and the α9 AI Processor 4K Gen8.
Which TV is better for long-term ownership?
The LG OLED55C56LB is the better long-term option because LG specifies security update support through December 2029.
Do both TVs support 4K 120Hz gaming?
Yes, both models support 4K 120Hz gaming through their HDMI 2.1 ports and include advanced gaming features such as VRR and ALLM.
Should I upgrade from OLED55C56LA to OLED55C56LB?
Not necessarily. The improvements are minor, so upgrading only makes sense if you specifically want the extended software support or additional regional connectivity features.
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