# US 11,308,915 B2 · Photoelectric selection signal control circuit, display apparatus, display method and control apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,308,915 B2 - Document ID: US11308915B2 - Status: Granted - Kind: B2 - Application number: 16/975,531 - Filed: 2020-01-22 - Published: 2021-02-04 - Granted: 2022-04-19 - Earliest claimed: 2019-01-29 - Assignees: Boe Technology Group Co., Ltd. - Applicants: Boe Technology Group Co., Ltd. - Inventors: Xinyi Cheng - Web page: https://patentgrep.com/patent/US11308915B2 ## CPC - G09G 5/10: Intensity circuits - G09G 3/20: for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix {no fixed position being assigned to or needed to be assigned to the individual characters or partial characters} - G09G 2310/08: Details of timing specific for flat panels, other than clock recovery - G09G 2354/00: Aspects of interface with display user - G09G 2360/14: Detecting light within display terminals, e.g. using a single or a plurality of photosensors - G09G 2380/04: Electronic labels - 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 photoelectric selection signal control circuit, a display apparatus, a display method and a control apparatus. The photoelectric selection signal control circuit comprises an output circuit and at least one signal control circuit. The signal control circuit is configured to output a comparison result signal under the control of a selection signal and an illumination signal; and the output circuit is configured to output an output signal according to the comparison result signal. ## Claims ### Claim 1 A photoelectric selection signal control circuit, comprising an output circuit and at least one signal control circuit, wherein the signal control circuit is configured to output a comparison result signal under control of a selection signal and a lighting signal, and the output circuit is configured to output an output signal according to the comparison result signal, wherein the signal control circuit comprises: an input circuit, configured to receive a first voltage signal and output a first control signal under control of the selection signal; a photosensitive circuit, configured to output a second control signal according to the first control signal under control of the lighting signal; and a comparison circuit, configured to compare the second control signal with a second voltage signal different from the first voltage signal and output the comparison result signal. ### Claim 2 (depends on 1) The photoelectric selection signal control circuit according to claim 1, wherein the photosensitive circuit comprises a phototransistor, a collector electrode of the phototransistor is connected to the input circuit and configured to receive the first control signal, an emitter electrode of the phototransistor is connected to the comparison circuit and configured to output the second control signal, and a base electrode of the phototransistor is configured to receive the lighting signal. ### Claim 3 (depends on 1) The photoelectric selection signal control circuit according to claim 1, wherein the input circuit comprises a transistor, a control electrode of the transistor is configured to receive the selection signal, a first electrode of the transistor is configured to receive the first voltage signal, and a second electrode of the transistor is connected to the photosensitive circuit and configured to output the first control signal. ### Claim 4 (depends on 1) The photoelectric selection signal control circuit according to claim 1, wherein the comparison circuit comprises a comparator, a non-inverting input terminal of the comparator is connected to the photosensitive circuit and configured to receive the second control signal, an inverting input terminal of the comparator is configured to receive the second voltage signal, and an output terminal of the comparator is configured to output the comparison result signal. ### Claim 5 (depends on 1) The photoelectric selection signal control circuit according to claim 1, wherein the at least one signal control circuit comprises a plurality of signal control circuits, and the plurality of signal control circuits transmit comparison result signals output by the plurality of signal control circuits to the output circuit, respectively. ### Claim 6 (depends on 5) The photoelectric selection signal control circuit according to claim 5, wherein the plurality of signal control circuits are connected in parallel with each other. ### Claim 7 (depends on 1) The photoelectric selection signal control circuit according to claim 1, wherein the output circuit comprises an OR gate, an input terminal of the OR gate is connected to the signal control circuit and configured to receive the comparison result signal, and an output terminal of the OR gate is configured to output the output signal. ### Claim 8 A display device, comprising a control circuit, a display element, and a photoelectric selection signal control circuit, wherein the photoelectric selection signal control circuit comprises an output circuit and at least one signal control circuit, the signal control circuit is configured to output a comparison result signal under control of a selection signal and a lighting signal, and the output circuit is configured to output an output signal according to the comparison result signal; the control circuit is configured to generate the selection signal and output the selection signal to the signal control circuit of the photoelectric selection signal control circuit, and is configured to control the display element to display according to the output signal of the output circuit of the photoelectric selection signal control circuit; and the at least one signal control circuit comprises a plurality of signal control circuits, the selection signal selects and turns on an input circuit of only one signal control circuit of the plurality of signal control circuits at any moment, and the control circuit is configured to determine whether to start a decoding step at a current moment according to the output signal of the photoelectric selection signal control circuit, and is configured to continuously generate and output the selection signal to an input circuit selected at the current moment and continuously receive and decode the output signal to obtain authentication information and to enable a display control function in a case where the decoding step is started. ### Claim 9 (depends on 8) The display device according to claim 8, further comprising a signal receiving circuit, wherein the signal receiving circuit is configured to receive a label control signal; the control circuit is configured to control a display state of a label according to the label control signal; and the display element is configured to display the label according to the display state. ### Claim 10 (depends on 9) The display device according to claim 9, wherein the display element is configured to display a plurality of labels, each label of the plurality of labels corresponds to one signal control circuit of the plurality of signal control circuits, and a position corresponding to the each label is provided with a photosensitive circuit of the one signal control circuit; the display state comprises a label position state; the control circuit is configured to determine a corresponding photosensitive circuit according to the input circuit selected at the current moment, determine a label corresponding to the label control signal according to a location of the photosensitive circuit, and control the label position state of the label according to the label control signal; and the display element is configured to display the label according to the label position state. ### Claim 11 (depends on 9) The display device according to claim 9, wherein a plurality of photosensitive circuits of the plurality of signal control circuits comprise a photosensitive circuit provided on one side of the display element; the display state comprises a label arrangement state; the control circuit is configured to control the label arrangement state of the label according to the label control signal if a photosensitive circuit corresponding to the input circuit selected at the current moment is the photosensitive circuit provided on the one side of the display element; and the display element is configured to display the label according to the label arrangement state. ### Claim 12 (depends on 8) The display device according to claim 8, wherein the output signal comprises a preamble code, a synchronization code, a data code, and a verification code, the preamble code is used to start the decoding step, the synchronization code is used to provide synchronization of timing, the data code comprises data information to be transmitted, and the verification code is used to verify whether transmitted data information is correct. ### Claim 13 A control device, comprising: a trigger circuit, configured to receive a trigger instruction from a user and send out a trigger signal; a signal generation circuit, configured to generate a lighting signal based on a preset code according to the trigger signal; and a signal sending circuit, configured to transmit the lighting signal to a photosensitive circuit of a photoelectric selection signal control circuit, wherein the lighting signal comprises a preamble code, a synchronization code, a data code, and a verification code, the preamble code is used to start a decoding step, the synchronization code is used to provide synchronization of timing, the data code comprises data information to be transmitted, and the verification code is used to verify whether transmitted data information is correct. ### Claim 14 (depends on 13) The control device according to claim 13, wherein the trigger circuit comprises at least one button, and the button sends out the trigger signal when being pressed. ### Claim 15 (depends on 13) A display system, comprising the control device according to claim 13, and a display device, wherein the display device comprises a control circuit, a display element, and a photoelectric selection signal control circuit; the photoelectric selection signal control circuit comprises an output circuit and at least one signal control circuit, the signal control circuit is configured to output a comparison result signal under control of a selection signal and a lighting signal, and the output circuit is configured to output an output signal according to the comparison result signal; and the control circuit is configured to generate the selection signal and output the selection signal to the signal control circuit of the photoelectric selection signal control circuit, and is configured to control the display element to display according to the output signal of the output circuit of the photoelectric selection signal control circuit. ### Claim 16 (depends on 8) A display method applied to the display device according to claim 8, comprising: using the control circuit to generate the selection signal and output the selection signal to the signal control circuit of the photoelectric selection signal control circuit; and using the control circuit to control the display element to display according to the output signal of the output circuit of the photoelectric selection signal control circuit. ### Claim 17 (depends on 16) The display method according to claim 16, wherein the photoelectric selection signal control circuit comprises a plurality of signal control circuits, the selection signal selects and turns on an input circuit of only one signal control circuit of the plurality of signal control circuits at any moment, and the display method further comprises: using the control circuit to determine whether to start a decoding step at a current moment according to the output signal of the photoelectric selection signal control circuit; and using the control circuit to continuously generate and output the selection signal to an input circuit selected at the current moment and using the control circuit to continuously receive and decode the output signal to obtain authentication information and enable a display control function after the decoding step is started.