Display device, method of manufacturing the same, and method of HMD interfacing using the same
Inventors
Lee, Doyoung • EOM, JaeWon • WON, JunHo • HAN, Chang Hoon
Assignees
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Publication Number
US-10109778-B2
Publication Date
2018-10-23
Expiration Date
Abstract
A display device includes an upper structure, a lower structure, and a connecting element. The upper structure includes a display element having a first electrode, a light emitting layer, and a second electrode. The light emitting layer is disposed on the first electrode to generate light. The second electrode is disposed on the light emitting layer to transmit the light. The lower structure includes a display driving circuit. The display driving circuit receives an image signal to apply an electric power to the first electrode. The lower structure is physically separated from the upper structure to be spaced apart from the upper structure by a predetermined distance with respect to a vertical direction. The connecting element is disposed between the upper structure and the lower structure to connect the first electrode to the display driving circuit.
Core Innovation
The invention is a display device that includes an upper structure with a display element and a lower structure with a display driving circuit. The display element includes a first electrode, a light emitting layer disposed on the first electrode to generate light, and a second electrode disposed on the light emitting layer to transmit the light. The lower structure is physically separated from the upper structure so that it is spaced apart from the upper structure by a predetermined distance with respect to a vertical direction, and a connecting element disposed between the upper structure and the lower structure connects the first electrode to the display driving circuit.
Adjacent display elements of the upper structure are spaced apart so that external light is incident into a space between the adjacent display elements. A photo sensing element disposed between the display elements changes the external light into an electric signal, and a photo sensing readout circuit generates a photo sensing signal using the electric signal received from the photo sensing element. The display driving circuit receives an image signal and applies electric power to the first electrode or to the second electrode through the first electrode, depending on the configuration.
The disclosure further integrates photo sensing and display elements within a stacked arrangement and supports associated configurations, including photo sensing readout circuitry and optical conversion features. The photo sensing element and the photo sensing readout circuit generate a photo sensing signal using the external light between display elements, and optional conversion is described using a photo change layer and a color filter to convert emitted light into primary color light.
A method of manufacturing is described in which display driving circuitry, photo sensing elements, and photo sensing readout circuitry are formed on a base substrate, and a light emitting layer and electrodes are formed on an additional substrate, aligned and combined, and then the additional substrate is removed. The disclosure also states an HMD interfacing method that uses the display device with the upper structure and lower structure, including the photo sensing element and the photo sensing readout circuit, to release a lock mode, display a cursor or a command icon, couple iris movement with the cursor, select the command icon through blinking, and perform a command corresponding to the command icon.
Claims Coverage
The partial content includes three independent claim categories: one independent device claim, a second independent device claim with a light-emitting element electrode arrangement, and independent manufacturing and HMD interfacing method claims. Across these, the main inventive features are the stacked upper/lower structure separation with external-light photo sensing between adjacent display elements, the integration of photo sensing readout circuitry that generates a photo sensing signal from external light, the manufacturing approach that aligns and combines an additional substrate carrying the light emitting layer and electrodes with a base substrate carrying the driving and photo sensing circuits, and an HMD interaction method driven by photo sensing to control cursor and command selection.
Stacked upper and lower structures with predetermined vertical separation and connecting element
A display device comprising an upper structure including a display element having a first electrode, a light emitting layer disposed on the first electrode to generate light, and a second electrode disposed on the light emitting layer to transmit the light; a lower structure including a display driving circuit, the display driving circuit receiving an image signal to apply an electric power to the first electrode; the lower structure physically separated from the upper structure to be spaced apart from the upper structure by a predetermined distance with respect to a vertical direction; and a connecting element disposed between the upper structure and the lower structure to connect the first electrode to the display driving circuit.
External-light incidence between adjacent display elements enabling photo sensing and photo sensing readout
The display element of the upper structure is spaced apart from an adjacent display element so that an external light is incident into a space between the adjacent display elements, and the lower structure further comprises a photo sensing element disposed between the display elements to change the external light into an electric signal, and a photo sensing readout circuit generating a photo sensing signal using the electric signal received from the photo sensing element.
Light-emitting layer electrodes arranged so first electrode does not block light path
A display device including an upper structure in which a light emitting layer generating light has a first electrode disposed under the light emitting layer to be coupled with a positive electrode and a negative electrode of the light emitting layer, the first electrode not blocking a path of the light generated from the light emitting layer; a lower structure physically separated from the upper structure by a predetermined distance with respect to a vertical direction; and a connecting element disposed between the upper structure and the lower structure to connect the first electrode to the display driving circuit, wherein external light is incident into a space between adjacent display elements and is changed into an electric signal by a photo sensing element for a photo sensing readout circuit.
Base substrate photo sensing and driving circuit formation with additional-substrate light emitting layer alignment and substrate removal
A method of manufacturing a display device comprising forming a display driving circuit, a photo sensing element, and a photo sensing readout circuit on the same surface of a base substrate; forming a connecting element on the display driving circuit; sequentially forming a light emitting layer and a first electrode on an additional substrate; aligning the additional substrate over the base substrate; combining the first electrode with the connecting element; removing the additional substrate from the light emitting layer; and forming a second electrode on the light emitting layer.
HMD interfacing using photo sensing to release lock mode, control cursor, select command icon, and execute command
A method of head mount display (HMD) interfacing using a display device comprising an upper structure, a lower structure, and a connecting element, including releasing a lock mode using the photo sensing element and the photo sensing readout circuit; sensing an operation of continuously blinking two or more times or closing one eye to display a cursor or a command icon on the display element; sensing iris movement so that the iris movement is coupled with the cursor; transporting the cursor to the command icon; selecting the command icon through blinking one or more times; and performing a command corresponding to the command icon.
Within the partial content, the claim coverage centers on a physically separated stacked display device where spaces between adjacent display elements admit external light to a photo sensing element, and where a photo sensing readout circuit generates a photo sensing signal. The independent claims also cover a manufacturing sequence that forms driving and photo sensing circuitry on a base substrate and forms the light emitting layer and electrodes on an additional substrate that is aligned, combined via an electrode connection, and then removed, and an HMD interfacing method that uses the photo sensing to move a cursor and select a command icon based on blinking and eye actions.
Stated Advantages
Improved opening ratio
Sensing accuracy via noise minimization and optical filtering
Stable driving voltage
Suitable for a micro-display
Reduced upper-structure cost
Technical advantages enabled by reducing optical noise and using optical components
Documented Applications
Head mount display (HMD) interfacing using a cursor and command icon controlled by eye and iris interactions
Smart glass and sensing devices
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