A display apparatus, comprising: a transparent display panel having a plurality of subpixels; and an array of a plurality of micro light modulators (M) on the display panel and configured to adaptively modulate display contrast of the display apparatus; wherein each of the plurality of micro light modulators (M) is configured to adaptively modulate a light intensity of light emitted out of a light emitting side of the display panel in a region corresponding to each of the plurality of micro light modulators (M) based on a luminance level of a current image displayed in the region; the display panel has a first side distal to the array of the plurality of micro light modulators (M), and a second side opposite to the first side and proximal to the array of the plurality of micro light modulators (M); each of the plurality of micro light modulators (M) is configured to adaptively modulate a first light intensity of first light (L1) by reflecting a first portion (L2-1) of second light (L2) toward the second side thereby increasing the first light intensity; each of the plurality of micro light modulators (M) comprises a micro mirror ; the micro mirror has a reflective surface at a first angle with respect to a surface of the second side of the display panel ; the reflective surface is configured to reflect a first portion (L2-1) of the second light (L2) toward the second side and the second portion (L2-2) of the second light (L2) along a direction away from the second side; and the display apparatus further comprises an adaptive control circuit configured to control the first angle to adaptively adjust a ratio of the first portion (L2-1) to the second portion (L2-2) in response to a change in the second light intensity thereby adaptively modulating the first light intensity based on the second light intensity. a transparent display panel having a plurality of subpixels; and an array of a plurality of micro light modulators (M) on the display panel and configured to adaptively modulate display contrast of the display apparatus; wherein each of the plurality of micro light modulators (M) is configured to adaptively modulate a light intensity of light emitted out of a light emitting side of the display panel in a region corresponding to each of the plurality of micro light modulators (M) based on a luminance level of a current image displayed in the region; the display panel has a first side distal to the array of the plurality of micro light modulators (M), and a second side opposite to the first side and proximal to the array of the plurality of micro light modulators (M); each of the plurality of micro light modulators (M) is configured to adaptively modulate a first light intensity of first light (L1) by reflecting a first portion (L2-1) of second light (L2) toward the second side thereby increasing the first light intensity; each of the plurality of micro light modulators (M) comprises a micro mirror ; the micro mirror has a reflective surface at a first angle with respect to a surface of the second side of the display panel ; the reflective surface is configured to reflect a first portion (L2-1) of the second light (L2) toward the second side and the second portion (L2-2) of the second light (L2) along a direction away from the second side; and the display apparatus further comprises an adaptive control circuit configured to control the first angle to adaptively adjust a ratio of the first portion (L2-1) to the second portion (L2-2) in response to a change in the second light intensity thereby adaptively modulating the first light intensity based on the second light intensity. <EOS>