Energy sensing light emitting diode display
First Claim
1. A display device, comprising:
- a plurality of light emitting diodes (LEDs) forming a display of the display device;
a driving circuit coupled to each of the LEDs, the driving circuit configured to drive each LED to emit light; and
a sensing circuit coupled to each of the LEDs, the sensing circuit configured to detect a shadow, wherein an LED in the shadow senses less light energy than an LED partially in or completely out of the shadow.
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Accused Products
Abstract
A display that includes energy sensors within the display itself is disclosed. An Organic Light Emitting Diode (OLED) can be made to operate both as a light emitter and as an energy detector. When forward biased with an appropriate driving signal, the OLED emits light via electroluminescence, which can be used to make a portion of an image on the display. In another mode, the OLED can detect energy by converting incoming photons or energy into an electrical signal by the photoelectric effect. By operating OLEDs in the display in both emissive and sensing modes, energy that shines on the display, such as from an outside source can be detected at the same time an image is shown. Additionally, a display including OLEDs can detect light energy generated by the display itself.
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Citations
24 Claims
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1. A display device, comprising:
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a plurality of light emitting diodes (LEDs) forming a display of the display device; a driving circuit coupled to each of the LEDs, the driving circuit configured to drive each LED to emit light; and a sensing circuit coupled to each of the LEDs, the sensing circuit configured to detect a shadow, wherein an LED in the shadow senses less light energy than an LED partially in or completely out of the shadow. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A display device, comprising:
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a plurality of light emitting diodes (LEDs) forming a display of the display device; a driving circuit coupled to each of the LEDs, the driving circuit configured to drive each LED to emit light; and a sensing circuit coupled to each of the LEDs, the sensing circuit configured to detect a shadow, wherein the sensing circuit is configured to receive an electrical signal from each LED when that LED is operated in a sense mode, and wherein; the plurality of LEDs includes first and second LEDs that are electrically connected to the driving circuit and the sensing circuit; the sensing circuit is configured to sense first and second amounts of light incident on the first and second LEDs, respectively, wherein an LED in the shadow senses less light energy than an LED partially in or completely out of the shadow; and the driving circuit is configured to individually control a brightness level of the first and second LEDs responsive to the first and second amounts of light, respectively, incident on the first and second LEDs as detected by the sensing circuit. - View Dependent Claims (9, 10)
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11. A display device, comprising:
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a plurality of light emitting diodes (LEDs) forming a display of the display device; a driving circuit coupled to each of the LEDs, the driving circuit configured to drive each LED to emit light; and a sensing circuit coupled to each of the LEDs, the sensing circuit configured to detect light energy, wherein the sensing circuit is configured to receive an electrical signal from each LED when that LED is operated in a sense mode, and wherein; the plurality of LEDs includes first, second and third LEDs that are electrically connected to the driving circuit and the sensing circuit; the sensing circuit is configured to sense first, second and third amounts of light incident on the first, second and third LEDs, respectively, based on whether each LED is in, partially in, or completely out of a shadow; and the driving circuit is configured to individually control a brightness level of the first, second and third LEDs responsive to the first, second and third amounts of light, respectively, incident on the first, second and third LEDs as detected by the sensing circuit. - View Dependent Claims (12, 13, 14)
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15. A method of operating a display having a plurality of light emitting diodes (LEDs), the method comprising:
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driving each LED in an emit mode to display an image on the display; switching at least one LED from the emit mode to a sense mode; sensing an electrical signal from the at least one LED in the sense mode; detecting a shadow on the display based on light energy sensed by the at least one LED, wherein an LED in the shadow senses less light energy than an LED that is partially in or completely out of the shadow; and switching the at least one LED from the sense mode to the emit mode. - View Dependent Claims (16, 17, 18)
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19. A display system comprising:
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a display panel capable of displaying an image wherein the display panel comprises a plurality of display elements wherein the display elements are capable of causing an image to be formed on the display panel and a plurality of sensing elements wherein the sensing elements are capable of sensing external light and wherein the display elements and the sensing elements are located in columns and rows, driving circuitry capable of driving the display elements and causing an image to be formed on the display panel, sensing circuitry capable of outputting information based on an amount of external light received by the sensing elements according to the column and row in which the sensing element is located, and a data storage unit capable of storing output from the sensing circuitry according to the column and row in which the sensing element is located. - View Dependent Claims (20, 21, 22, 23, 24)
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Specification