# US 7,745,817 B2 · Combined information display and information input device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,745,817 B2 - Document ID: US7745817B2 - Status: Granted - Kind: B2 - Application number: 10/519,371 - Filed: 2003-06-26 - Published: 2006-07-06 - Granted: 2010-06-29 - Earliest claimed: 2002-07-03 - Assignees: Cambridge Display Technology Limited - Inventors: Jonathan Halls; Matthew Shade - Web page: https://patentgrep.com/patent/US7745817B2 ## CPC - H04N 1/02805: {with photodetectors arranged in a two-dimensional array} - B82Y 10/00: Nanotechnology for information processing, storage or transmission, e.g. quantum computing or single electron logic - G06F 3/0421: {by interrupting or reflecting a light beam, e.g. optical touch-screen} - H04N 1/00129: {with a display device, e.g. CRT or LCD monitor (with a television apparatus H04N1/00283; arrangements for control of display devices G09G)} - H10F 39/10: Integrated devices - H10F 39/1892: {Direct radiation image sensors} - H10K 39/00: Integrated devices, or assemblies of multiple devices, comprising at least one organic radiation-sensitive element covered by group H10K30/00 - H10K 39/30: Devices controlled by radiation - H10K 59/17: Passive-matrix OLED displays - H10K 59/40: OLEDs integrated with touch screens - H10K 30/30: comprising bulk heterojunctions, e.g. interpenetrating networks of donor and acceptor material domains - H10K 59/173: comprising banks or shadow masks - H10K 59/179: Interconnections, e.g. wiring lines or terminals - H10K 59/35: comprising red-green-blue [RGB] subpixels - H10K 65/00: Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element and at least one organic radiation-sensitive element, e.g. organic opto-couplers (organic image sensors integrated with organic light-emitting devices H10K39/34; OLED displays integrated with photosensors H10K59/13) - H10K 71/13: using printing techniques, e.g. ink-jet printing or screen printing - H10K 85/113: {Heteroaromatic compounds comprising sulfur or selene, e.g. polythiophene} - H10K 85/1135: {Polyethylene dioxythiophene [PEDOT]; Derivatives thereof} - H10K 85/114: {Poly-phenylenevinylene; Derivatives thereof} - H10K 85/115: {Polyfluorene; Derivatives thereof} - H10K 85/211: {Fullerenes, e.g. C60} - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION - B82Y: SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - H10F: INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES ## Abstract A combined information display and information input device comprising a matrix of independently addressable light emitting devices and a plurality of light sensing devices, the light emitting devices comprising organic light emitting diodes comprising organic light emitting material positioned between a low work function electrode and a high work function electrode characterized in that the light sensing devices comprise organic photovoltaic devices comprising at least an organic electron donor and at least an organic electron acceptor positioned between a high work function electrode and a low work function electrode. The combined information display and information input device has application as a touch screen, for example for a mobile communication device. ## Claims ### Claim 1 A combined information display and information input device comprising a matrix of independently addressable light emitting devices and a plurality of light sensing devices, said light emitting devices comprising organic light emitting diodes comprising organic light emitting material positioned between a low work function electrode formed from a low work function material layer and a high work function electrode formed from a high work function material layer, and said light sensing devices comprising organic photovoltaic devices comprising at least an organic electron donor and at least an organic electron acceptor positioned between a high work function electrode formed from a high work function material layer and a low work function electrode formed from a low work function material layer, wherein the light emitting devices and the light sensing devices are disposed on a common substrate, and the high work function electrode of both the light emitting devices and the light sensing devices is formed from the same high work function layer and/or the low work function electrode of both the light emitting devices and the light sensing devices is formed from the same low work function layer. ### Claim 2 (depends on 1) The device of claim 1 wherein at least one of said organic electron donor and said organic electron acceptor comprises a semiconductive organic polymer. ### Claim 3 (depends on 1) The device of claim 1 wherein at least one of said organic electron donor and said organic electron acceptor comprises a fullerene. ### Claim 4 (depends on 1) The device of claim 1 wherein said organic electron donor and said organic electron acceptor comprise semiconductive organic polymers. ### Claim 5 (depends on 1) The device of claim 1 wherein said organic electron donor and said organic electron acceptor comprise a blend of semiconductive organic electron donor polymer and semiconductive organic electron acceptor polymer. ### Claim 6 (depends on 1) The device of claim 1 wherein at least one of said organic photovoltaic devices is sensitive to light in a non-visible region of the electromagnetic spectrum. ### Claim 7 (depends on 1) The device of claim 1 wherein more than one of said organic photovoltaic devices are sensitive to light in a non-visible region of the electromagnetic spectrum. ### Claim 8 (depends on 1) The device of claim 1 wherein all of said organic photovoltaic devices are sensitive to light in a non-visible region of the electromagnetic spectrum. ### Claim 9 (depends on 1) The device of claim 1 wherein at least one of said organic photovoltaic devices is sensitive to light in the infrared region of the electromagnetic spectrum. ### Claim 10 (depends on 1) The device of claim 1 wherein more than one of said organic photovoltaic devices are sensitive to light in the infrared region of the electromagnetic spectrum. ### Claim 11 (depends on 1) The device of claim 1 wherein all of said photovoltaic devices are sensitive to light in the infrared region of the electromagnetic spectrum. ### Claim 12 (depends on 1) The device of claim 1 wherein said organic light emitting devices comprise a group of light emitting devices emitting light of a color in the visible range of the electromagnetic spectrum and a further group of light emitting devices emitting light in a non-visible region of the electromagnetic spectrum. ### Claim 13 (depends on 12) The device of claim 12 wherein said further group of light emitting devices emit light in the infrared region of the electromagnetic spectrum. ### Claim 14 (depends on 1) The device of claim 1 wherein said matrix of independently addressable light emitting devices comprises a plurality of light emitting device addressing column electrodes and a plurality of light emitting device addressing row electrodes, said column electrodes intersecting said row electrodes, and said organic light emitting devices being positioned at the intersection of said column electrodes and said row electrodes. ### Claim 15 (depends on 14) The device of claim 14 wherein said plurality of light sensing devices comprises a matrix of independently addressable light sensing devices. ### Claim 16 (depends on 15) The device of claim 15 wherein said matrix of independently addressable light sensing devices comprises a plurality of light sensing device addressing column electrodes and a plurality of light sensing device addressing row electrodes, said column electrodes intersecting said row electrodes, and said light sensing devices being positioned at the intersection of said column electrodes and said row electrodes. ### Claim 17 (depends on 16) The device of claim 16 further comprising a combined column driver and detector for addressing said light emitting device column electrodes and said light sensing device column electrodes, said column driver and detector comprising circuitry for providing a forward bias to said light emitting devices to cause them to emit light and comprising circuitry for detecting light incident on said light sensing devices. ### Claim 18 (depends on 16) The device of claim 16 comprising a) a column driver for addressing said light emitting device column electrodes, said column driver comprising circuitry for providing a forward bias to said light emitting devices to cause them to emit light, and b) a column detector for addressing said light sensing device column electrodes, said column detector comprising circuitry for detecting light incident on said light sensing devices. ### Claim 19 (depends on 16) The device of claim 16 further comprising a combined row selector driver for addressing said light emitting device row electrodes and said light sensing device row electrodes. ### Claim 20 (depends on 16) The device of claim 16 further comprising (a) a light emitting device row selector driver for addressing said light emitting devices row electrodes and (b) a light sensing device row selector driver for addressing said light sensing device row electrodes. ### Claim 21 (depends on 17) The device of claim 17 wherein said combined column driver and detector or said column detector further comprises means for reverse biasing said light sensing devices. ### Claim 22 (depends on 18) The device of claim 18 further comprising a clock signal generator for providing a scanning signal to the combined row selector driver or to said light emitting device row selector driver and said light sensing device row selector driver. ### Claim 23 (depends on 22) The device of claim 22 wherein said clock signal generator provides scanning signals to the combined row selector driver or to said light emitting device row selector driver and said light sensing device row selector driver at a first higher frequency and a second lower frequency said first higher frequency scanning signal addressing said light emitting device row electrodes and said second lower frequency scanning signal addressing said light sensing device row electrodes. ### Claim 24 (depends on 20) The device of claim 20 further comprising a first clock signal generator and a second clock signal generator, said first clock signal generator providing a scanning signal to said light emitting device row electrodes and said second clock signal generator providing a scanning signal to said light sensing device row electrodes. ### Claim 25 (depends on 24) The device of claim 24 wherein said first clock signal generator provides a higher frequency scanning signal than said second clock signal generator. ### Claim 26 (depends on 1) The device of claim 1 further comprising a hole transporting layer between said high work function electrode and said organic light emitting material. ### Claim 27 (depends on 26) The device of claim 26, wherein the hole transporting layer of both the light emitting devices and the light sensing devices is formed from the same layer. ### Claim 28 (depends on 1) Method of preparing the device of claim 1 comprising the steps of: (a) providing a substrate, (b) providing a patterned layer of high work function material, (c) providing a patterned layer of organic light emitting material and a patterned layer of organic photovoltaic material, said organic photovoltaic material comprising at least an organic electron donor and at least an organic electron acceptor, and (d) providing a layer of low work function material, wherein at least one of said steps of providing a patterned layer of organic light emitting material or a patterned layer of organic photovoltaic material over said layer of conductive material of high work function comprises applying said material using a method of selective printing. ### Claim 29 (depends on 28) The method of claim 28 wherein said method of selective printing is selected from the group consisting of ink-jet printing, flexographic printing, gravure printing, and screen printing. ### Claim 30 (depends on 29) The method of claim 29 wherein said method of selective printing comprises ink-jet printing. ### Claim 31 (depends on 1) Method of preparing a combined information display and information input device according to claim 1 comprising the steps of: (a) providing a substrate, (b) providing a patterned layer of high work function material, (c) providing a first layer of insulating material over said layer of high work function material said first layer of insulating material being patterned to form a series of wells, (d) providing a second layer of insulating material, said second layer of insulating material being patterned to form a series of parallel banks over said first layer of insulating material, (e) optionally depositing by means of ink-jet printing a layer of hole transporting material into a selection of said wells, (f) depositing by means of ink-jet printing a layer of an organic light emitting material into a first selection of said wells, (g) depositing by means of ink-jet printing a layer of organic photovoltaic material comprising at least an organic electron donor and at least an organic electron acceptor into a second selection of said wells, and (h) depositing a layer of low work function material over said layer of organic light emitting material and said layer of organic photovoltaic material, wherein steps (f) and (g) may be carried out in any order. ### Claim 32 (depends on 1) Method of preparing a combined information display and information input device according to claim 1, comprising the steps of; (a) providing a substrate, (b) providing a patterned layer of high work function material, (c) providing a first layer of insulating material over said layer of high work function material, said first layer of insulating material being patterned to form a series of wells, (d) providing a second layer of insulating material, said second layer of insulating material being patterned to form a series of parallel banks over said first layer of insulating material, (e) optionally depositing by means of ink-jet printing a layer of hole transporting material into a selection of said wells, (f) depositing by means of ink-jet printing a third layer of insulating material in a first selection of said wells, (g) depositing by means of ink-jet printing a layer of an organic light emitting material into a second selection of said wells, (h) depositing by means of ink-jet printing a layer of organic photovoltaic material comprising at least an organic electron donor and at least an organic electron acceptor into a third selection of said wells, and (i) depositing a layer of low work function material over said layer of organic light emitting material and said layer of organic photovoltaic material, wherein steps (e), (f), (g) and (h) may be carried out in any order provided that when present the layer of hole transporting material is deposited prior to the deposition of the organic light emitting material or the organic photovoltaic material.