# US 11,307,687 B2 · Display device and input/output device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,307,687 B2 - Document ID: US11307687B2 - Status: Granted - Kind: B2 - Application number: 16/720,040 - Filed: 2019-12-19 - Published: 2020-04-23 - Granted: 2022-04-19 - Earliest claimed: 2014-05-02 - Assignees: Semiconductor Energy Laboratory Co., Ltd. - Applicants: Semiconductor Energy Laboratory Co., Ltd. - Inventors: Kei Takahashi; Hiroyuki Miyake - Web page: https://patentgrep.com/patent/US11307687B2 ## CPC - G06F 3/0412: {Digitisers structurally integrated in a display} - G06F 3/041: Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means - G06F 3/04166: {Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving (Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184)} - G06F 3/04182: {Filtering of noise external to the device and not generated by digitiser components} - G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element - G06F 3/042: by opto-electronic means - G06F 3/044: by capacitive means - G06F 2203/04102: Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper - G09G 2300/0842: forming a memory circuit, e.g. a dynamic memory with one capacitor - G09G 2300/0876: Supplementary capacities in pixels having special driving circuits and electrodes instead of being connected to common electrode or ground; Use of additional capacitively coupled compensation electrodes - G09G 2310/02: Addressing, scanning or driving the display screen or processing steps related thereto - G09G 2320/0295: by monitoring each display pixel - G09G 2320/043: Preventing or counteracting the effects of ageing - G09G 2380/02: Flexible displays - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00) ## Abstract A circuit which detects an output current from a pixel and an output current from an input device, and converts the output current into data is provided. The current detection circuit includes an integrator circuit, a comparator, a counter, and a latch. The integrator circuit integrates the potential of a first signal during a period determined by a second signal and outputting it as a third signal. The comparator compares the potential of the third signal with a first potential and outputting a fourth signal. The counter outputs the number of pulses included in a fifth signal as a sixth signal during a period determined by the fourth signal. The latch holds the sixth signal. The integrator circuit preferably further includes an operational amplifier and some capacitors. The first signal is supplied from a pixel included in a display device or an input portion included in an input device. ## Claims ### Claim 1 An electronic device comprising: a display portion comprising a pixel, the pixel comprising a first transistor; a touch sensor; a first driver circuit configured to supply an image signal to the display portion; a second driver circuit electrically connected to the touch sensor; a scan line driver circuit configured to supply a selection signal to the display portion, the scan line driver circuit comprising a second transistor; a first circuit configured to be supplied with a first signal from the display portion and a second signal from the touch sensor; and a second signal circuit configured to supply the image signal to the first driver circuit and a driving signal to the second driver circuit, wherein the first driver circuit and the second driver circuit are provided in one integrated circuit (IC) chip, wherein the first transistor of the display portion and the second transistor of the scan line driver circuit are formed in the same process and over the same substrate, wherein the scan line driver circuit is positioned adjacent to a long side of the display portion, wherein the IC chip is positioned adjacent to a short side of the display portion, and wherein, when the electronic device is folded, the display portion and the scan line driver circuit are folded while the IC chip is not folded. ### Claim 2 (depends on 1) The electronic device according to claim 1, wherein the IC chip is formed by chip-on-glass. ### Claim 3 (depends on 1) The electronic device according to claim 1, wherein the electronic device is a portable information terminal. ### Claim 4 (depends on 1) The electronic device according to claim 1, wherein the IC chip includes a memory, a Central Processing Unit (CPU), and an image processing circuit. ### Claim 5 (depends on 1) The electronic device according to claim 1, wherein the IC chip includes a current detection circuit, a memory, a Central Processing Unit (CPU), and an image processing circuit. ### Claim 6 (depends on 1) The electronic device according to claim 1, wherein the electronic device is folded in a direction parallel to the short side. ### Claim 7 An electronic device comprising: a display portion comprising a pixel, the pixel comprising a first transistor; a touch sensor; a first driver circuit configured to supply an image signal to the display portion; a second driver circuit electrically connected to the touch sensor; a scan line driver circuit configured to supply a selection signal to the display portion, the scan line driver circuit comprising a second transistor; a first circuit configured to be supplied with a first signal from the display portion and a second signal from the touch sensor; and a second signal circuit configured to supply the image signal to the first driver circuit and a driving signal to the second driver circuit, wherein the first driver circuit and the second driver circuit are provided in one integrated circuit (IC) chip, wherein the scan line driver circuit is positioned adjacent to a long side of the display portion, wherein the IC chip is positioned adjacent to a short side of the display portion, and wherein, when the electronic device is folded, the display portion and the scan line driver circuit are folded while the IC chip is not folded. ### Claim 8 (depends on 7) The electronic device according to claim 7, wherein the IC chip is formed by chip-on-glass. ### Claim 9 (depends on 7) The electronic device according to claim 7, wherein the electronic device is a portable information terminal. ### Claim 10 (depends on 7) The electronic device according to claim 7, wherein the IC chip includes a memory, a Central Processing Unit (CPU), and an image processing circuit. ### Claim 11 (depends on 7) The electronic device according to claim 7, wherein the IC chip includes a current detection circuit, a memory, a Central Processing Unit (CPU), and an image processing circuit. ### Claim 12 (depends on 7) The electronic device according to claim 7, wherein the electronic device is folded in a direction parallel to the short side.