A display device (100; 500), comprising a display module (110; 510), an image analysis device and a controller, wherein the display module (110; 510) comprises a plurality of display subareas, and each of the display subareas comprises at least one display pixel; and the display device is characterized in that: the image analysis device is configured to perform an analysis of an input image received by the image analysis device, so as to obtain an information zone of the input image and a non-information zone outside the information zone, wherein the information zone and the non-information zone is obtained by: dividing the input image into a plurality of image subregions based on a number and a shape of each of the display subareas possessed by the display module; extracting texts and symbols in the image by a feature extraction algorithm; and determining, according to a location of the extracted texts and symbols, whether any of the plurality of image subregions is the information zone of the input image, or the non-information zone of the input image; and the controller is configured to render brightness of a display pixel, with a lowest brightness in a first region, in the first region of the display module (110; 510) higher than brightness of any display pixel in at least part of a second region of the display module (110; 510), when the display module (110; 510) displays the input image, wherein the first region of the display module (110; 510) is a display subarea of the display module (110; 510) corresponding to the information zone of the input image, and the second region of the display module (110; 510) is a display subarea of the display module (110; 510) corresponding to the non-information zone of the input image. wherein the display module (110; 510) comprises a plurality of display subareas, and each of the display subareas comprises at least one display pixel; and the display device is characterized in that: the image analysis device is configured to perform an analysis of an input image received by the image analysis device, so as to obtain an information zone of the input image and a non-information zone outside the information zone, wherein the information zone and the non-information zone is obtained by: dividing the input image into a plurality of image subregions based on a number and a shape of each of the display subareas possessed by the display module; extracting texts and symbols in the image by a feature extraction algorithm; and determining, according to a location of the extracted texts and symbols, whether any of the plurality of image subregions is the information zone of the input image, or the non-information zone of the input image; and the controller is configured to render brightness of a display pixel, with a lowest brightness in a first region, in the first region of the display module (110; 510) higher than brightness of any display pixel in at least part of a second region of the display module (110; 510), when the display module (110; 510) displays the input image, wherein the first region of the display module (110; 510) is a display subarea of the display module (110; 510) corresponding to the information zone of the input image, and the second region of the display module (110; 510) is a display subarea of the display module (110; 510) corresponding to the non-information zone of the input image. the image analysis device is configured to perform an analysis of an input image received by the image analysis device, so as to obtain an information zone of the input image and a non-information zone outside the information zone, wherein the information zone and the non-information zone is obtained by: dividing the input image into a plurality of image subregions based on a number and a shape of each of the display subareas possessed by the display module; extracting texts and symbols in the image by a feature extraction algorithm; and determining, according to a location of the extracted texts and symbols, whether any of the plurality of image subregions is the information zone of the input image, or the non-information zone of the input image; and the controller is configured to render brightness of a display pixel, with a lowest brightness in a first region, in the first region of the display module (110; 510) higher than brightness of any display pixel in at least part of a second region of the display module (110; 510), when the display module (110; 510) displays the input image, wherein the first region of the display module (110; 510) is a display subarea of the display module (110; 510) corresponding to the information zone of the input image, and the second region of the display module (110; 510) is a display subarea of the display module (110; 510) corresponding to the non-information zone of the input image.