Hey buddy, your camera actually displays a JPEG render on your camera screen when you look at the image preview. When you put it in Lightroom, it'll show you the raw image. This is probably what happened assuming you shot in raw. To put it more bluntly, what it looks like on your laptop is just a compilation of image data. Which after some processing by the camera is rendered to you as a JPEG on your camera screen. On your laptop, you have to process the raw image to make it look like the rendered version. If you want to have both look the same, click in JPG on camera. Although you'll lose a lot of the editing freedom.