Liquid crystal display apparatus

1. A liquid crystal display apparatus, comprising:

a liquid crystal panel having a display region for displaying an image and having a plurality of pixels disposed in said display region; said liquid crystal panel including

a first substrate,

a second substrate opposed in a spaced relationship to said first substrate,

a backlight disposed adjacent to said first substrate;

a liquid crystal layer sandwiched between said first substrate and said second substrates and oriented; and

a pair of first and second polarizing plates provided in an opposing relationship to each other through said display region;

an illuminating section disposed in an opposing relationship to the face of said liquid crystal panel adjacent said first substrate and configured to irradiate light so as to advance from said first substrate side toward said second substrate side;

said liquid crystal panel having a light receiving region in which a light receiving element is formed on a face of said first substrate and configured to receive light advancing from said second substrate toward said first substrate and to output a signal based upon the received light, and

said pair of first and second polarizing plates and said liquid crystal layer being disposed such that light advancing from said first substrate toward said second substrate is blocked in said light receiving region,

said liquid crystal panel further includes a black matrix layer formed so as to partition said pixels in said display region and block light;

said black matrix layer being formed such that an opening through which light is transmitted corresponds to said light receiving region;

said liquid crystal panel being formed such that light transmitted through the opening formed in said black matrix layer from within the light advancing from said second substrate toward said first substrate is received by said light receiving element; and

said liquid crystal layer being formed such that said light advancing from said first substrate toward said second substrate is blocked without being transmitted through the opening formed in said black matrix layer;

said light receiving element is provided on said first substrate so as to receive said light advancing from said second substrate toward said first substrate through said liquid crystal layer;

said liquid crystal panel being configured such that said plurality of pixels modulate the light irradiated from said illuminating section to display an image in said display region and

said liquid crystal layer blocks the light irradiated from said illumination section in said-light receiving region.

2. The liquid crystal display apparatus according to claim 1 , wherein said liquid crystal panel is configured such that an image is displayed in a normally black mode in the display region and, when an image is displayed in the display region, no voltage is applied to said liquid crystal layer in the light receiving region.

3. The liquid crystal display apparatus according to claim 2 , further comprising:

a conductive layer which formed in a corresponding relationship to the light receiving region and connected to said liquid crystal layer;

said conductive layer being placed in a grounded state.

4. The liquid crystal display apparatus according to claim 2 , further comprising:

a first electrode formed in a corresponding relationship to the light receiving region on the face of said first substrate which opposes to said second substrate and connected to said liquid crystal layer; and

a second electrode formed in an opposing relationship to said first electrode through said liquid crystal layer on the face of said second substrate which opposes to said first substrate and connected to said liquid crystal layer; and wherein,

when an image is displayed in the display region, potentials equal to each other are inputted to said first and second electrodes so that no voltage is applied to said liquid crystal layer.

5. The liquid crystal display apparatus according to claim 4 , wherein one of said first and second electrodes is placed in a grounded state while the other one of said first and second electrodes is placed in a floating state.

6. The liquid crystal display apparatus according to claim 1 , wherein said liquid crystal panel is configured such that an image is displayed in a normally white mode in the display region and, when an image is displayed in the display region, a voltage is applied to said liquid crystal layer in the light receiving region.

7. The liquid crystal display apparatus according to claim 6 , further comprising:

a first electrode formed in a corresponding relationship to the light receiving region on the face of said first substrate which opposes to said second substrate and connected to said liquid crystal layer; and

a second electrode formed in an opposing relationship to said first electrode through said liquid crystal layer on the face of said second substrate which opposes to said first substrate and connected to said liquid crystal layer; and wherein,

when an image is displayed in the display region, potentials different from each other are inputted to said first and second electrodes.