Abstract: An image display unit (1) with a front frame (2) and with a sensor device (6) provided with a sensor (9). The sensor (9) is provided for detecting the luminance and/or the color location of an image that displayed on a display (7) of the image display unit (1). To detect luminance, known image display units have a sensor support that, in a non-operating position, is placed in a recess of a frame of a flat screen in an area that cannot be seen by a viewer. Suitable drives make it possible for the sensor support to swivel out from its non-operating position into a position for detecting the luminance. The production of an image display unit of this type is complex. In addition, the drives are susceptible to malfunction, making continuous and fault-free luminance detection impossible. The disclosed arrangement avoids these drawbacks.