Display device

Abstract

The invention discloses a display device that comprises a casing, a screen, a photoconductive cell, a photoreceptor and a control circuit. The screen is set on front of the casing. The photoconductive cell is used to guide a beam, and the photoconductive cell includes a first surface, a second surface and a side surface. The first surface is used to receive light beam, and the first surface is on front of the casing; the second surface is used to lead out the beam, the second surface possesses a irregular structure to decrease the total reflection light flux; the side surface connects the edge of the first surface and the second surface, and the light flux that beam is refracted from the first surface to the second surface is bigger than the light flux that beam is refracted from the first surface to the side surface. The photoreceptor is mounted in the casing and faced to the second surface, it is used to receive the beam lead out from the second surface and output a signal. The control circuit is couple connected with the screen and the photoreceptor, and adjust the brightness of the screen according to signal.

Description

technical field [0001] The present invention relates to a display device, in particular to a display device whose light-guiding element has a proportional relationship limit in size and an irregular structured surface. Background technique [0002] In general display devices such as LCD TVs, the display brightness of the screen images can be manually adjusted by the user to adapt to the ambient brightness when viewing. For example, when watching programs in a dark room or at night, the screen may feel too bright under the contrast of human eyes, or the screen may feel darker in a well-lit room or during the day. At present, in addition to the traditional control buttons on the display device or the remote controller, there is also a design of adding a light sensor to the casing of the display device to automatically sense the ambient brightness and adjust the screen brightness accordingly. [0003] In addition, for the sake of aesthetics, the light sensor is usually arrange...

AI Technical Summary

Problems solved by technology

For example, the distance from the light source cannot be too far, or although LCD TVs are becoming thinner and thinner, and the market demand for wall-mounting is emphasized, the display device cannot be embedded in the wall due to the possibility of covering the light guide installed on the top of the cabinet. Give more play to the decorative effect

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