Image display unit and method of detecting object
First Claim
1. An image display unit comprising:
- a light source that emits a light;
a pair of transparent substrates;
a liquid crystal layer disposed between the pair of transparent substrates;
a transmission layer that includes first and second filters, the first filter configured to transmit a first light from the light and a second filter configured to transmit a second light from the light;
a plurality of pixels, each pixel including a first sub-pixel element that modulates the first light to a visible wavelength range based on image data, a second sub-pixel element that modulates the second light to an invisible wavelength range,and a third sub-pixel element that receives reflected light, the reflected light being the second light that is reflected from a target object;
a display driving means for driving the first sub-pixel element of the plurality of pixels based on the image data to emit the first light in the visible wavelength range;
a light reception driving means for driving the second sub-pixel element of the plurality of pixels to receive the reflected light; and
a detecting means for detecting the target object based on the reflected light.
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Accused Products
Abstract
An image display unit and a method of detecting an object which are capable of reliably detecting an object with a simple structure irrespective of use conditions are provided. Invisible light is emitted from a screen of a display portion. The invisible light reflected from a target object which comes in contact with or close to the screen is received on the screen. On the basis of the received invisible light, the target object is detected. Thus, the target object can be reliably detected without influence of the display state of the display portion, and influence of use conditions such as surrounding circumstances (the case where it is bright or dark). Moreover, for example, it is not necessary to separately arrange a component such as a touch panel, so the image display unit can be achieved with a simple structure.
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Citations
22 Claims
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1. An image display unit comprising:
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a light source that emits a light; a pair of transparent substrates; a liquid crystal layer disposed between the pair of transparent substrates; a transmission layer that includes first and second filters, the first filter configured to transmit a first light from the light and a second filter configured to transmit a second light from the light; a plurality of pixels, each pixel including a first sub-pixel element that modulates the first light to a visible wavelength range based on image data, a second sub-pixel element that modulates the second light to an invisible wavelength range, and a third sub-pixel element that receives reflected light, the reflected light being the second light that is reflected from a target object; a display driving means for driving the first sub-pixel element of the plurality of pixels based on the image data to emit the first light in the visible wavelength range; a light reception driving means for driving the second sub-pixel element of the plurality of pixels to receive the reflected light; and a detecting means for detecting the target object based on the reflected light. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An image display unit comprising:
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a light source that emits a light; a pair of transparent substrates; a liquid crystal layer disposed between the pair of transparent substrates; a transmission layer that includes first and second filters, the first filter configured to transmit a first light from the light and a second filter configured to transmit a second light from the light; a plurality of pixels, each pixel including a first sub-pixel element that modulates the first light to a visible wavelength range based on image data, a second sub-pixel element that modulates the second light to an invisible wavelength range, and a third sub-pixel element that receives reflected light, the reflected light being the second light that is reflected from a target object; a display driving unit configured to drive each first sub-pixel element of the plurality of pixels based on the image data to emit the first light in the visible wavelength range; a light reception driving unit configured to drive each second sub-pixel element of the plurality of pixels to receive the reflected light; and a detecting unit configured to detect the target object based on the reflected light. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification