Peripheral light sensor and liquid crystal display device using the same

#This application claims the priority to and the benefit of Korean Patent Application No. 10-2006-0131859, filed on Dec. 21, 2006, in the Korean Intellectual Property Office, the entire content of which is incorporated herein by reference.

#1. Field of the Invention

#The present invention relates to a peripheral light sensor and a liquid crystal display device using the same, and more particularly to a peripheral light sensor and a liquid crystal display device, which improves output characteristics of the peripheral light sensor and reduces power consumption of the liquid crystal display device.

#These and/or other aspects and advantages of the invention will become apparent and more readily appreciated from the following description of some embodiments, taken in conjunction with the accompanying drawings of which:

#FIG. 1 is a view showing a liquid crystal display device according to one embodiment of the present invention;

#FIG. 2 is a view showing one embodiment of a peripheral light sensor shown in FIG. 1; and

#Hereinafter, embodiments according to the present invention will be described with reference to the accompanying drawings, namely, FIGS. 1, 2 and 3. Here, when one element is coupled to another element, one element may be not only directly coupled to another element but also indirectly coupled to another element via another element. Further, irrelative elements are omitted for clarity. Also, like reference numerals refer to like elements throughout.

#FIG. 1 is a view showing a liquid crystal display device according to one embodiment of the present invention. Although FIG. 1 shows an active matrix liquid crystal display device, the present invention is not limited thereto.

#With reference to FIG. 1, the liquid crystal display device according to one embodiment of the present invention includes a pixel portion 20, a scan driver 40, a data driver 60, a gamma voltage supply section 80, a timing controller 100, peripheral light sensor 110 for detecting peripheral light, a back light driver 120, and a back light emitter 140. The peripheral light sensor 110 is formed in at least one region of a black matrix 30, which is formed at a peripheral portion of the pixel portion 20. An opening portion 35 is formed in the black matrix 30. Peripheral light may be incident on the region of the peripheral light sensor 110 through the opening portion 35. When the peripheral light is incident on the peripheral light sensor 110, the peripheral light sensor 110 generates a peripheral light sensing signal corresponding to an intensity of the peripheral light in order to control the back light driver 120.