# US 2018/0024356 A1 · Head-up display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0024356 A1 - Document ID: US20180024356A1 - Status: Published application - Kind: A1 - Application number: 15/549,506 - Filed: 2015-12-22 - Published: 2018-01-25 - Earliest claimed: 2015-02-09 - Assignees: Nippon Seiki Co., Ltd. - Applicants: Nippon Seiki Co., Ltd. - Inventors: Yasuhiro YAMAKAWA; Makoto HADA - Web page: https://patentgrep.com/patent/US20180024356A1 ## CPC - G02B 27/0101: {characterised by optical features (G02B27/0172 takes precedence)} - B60K 35/23: Head-up displays [HUD] (optical aspects of head-up displays G02B27/01) - G02B 26/10: Scanning systems - G02B 27/01: Head-up displays - G09G 3/02: by tracing or scanning a light beam on a screen - G09G 3/025: {with scanning or deflecting the beams in two directions or dimensions} - 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} - H04N 5/64: Constructional details of receivers, e.g. cabinets or dust covers (furniture aspects {of television cabinets} A47B81/06) - G02B 2027/0196: {having transparent supporting structure for display mounting, e.g. to a window or a windshield} - G09G 2320/0233: Improving the luminance or brightness uniformity across the screen - G09G 2320/041: Temperature compensation - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES - 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) - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract Provided is a head-up display device with which it is possible to display an image easily recognized by a user. A display for a display mechanism in the head-up display device includes: a light source unit capable of generating light that is the origin of a scanning line; a scan unit for scanning light in a first direction and in a second direction using a first scan element and a second scan element, respectively; a processing unit for generating a first drive signal having a frequency that matches the resonance frequency of the first scan element; and a drive unit for executing a resonance mode that is based on the first drive signal. The processing unit generates a second drive signal having a variable display waveform that is dependent on the resonance frequency, fixed first non-display waveforms that are not dependent on the resonance frequency, and a variable second non-display waveform that is dependent on the resonance frequency. The drive unit drives the second scan element in a non-resonance mode that is based on the second drive signal. ## Claims ### Claim 1 A head-up display device provided with a display mechanism including a display and a reflector, the display comprising: a light source unit capable of generating light that is an origin of a scanning line; a scan unit for scanning the light in a first direction and in a second direction using a first scan element and a second scan element, respectively; a processing unit for generating a first drive signal having a frequency identical to a resonance frequency of the first scan element; and a drive unit for driving the first scan element in a resonance mode that is based on the first drive signal, wherein the processing unit generates a second drive signal having a variable display waveform that depends on the resonance frequency, a fixed first non-display waveform that does not depend on the resonance frequency, and a variable second non-display waveform that depends on the resonance frequency, and the drive unit drives the second scan element in a non-resonance mode that is based on the second drive signal. ### Claim 2 (depends on 1) The head-up display device according to claim 1, wherein the fixed first non-display waveform is set in a non-display section corresponding to the maximum level and/or the minimum level of the second drive signal. ### Claim 3 (depends on 2) The head-up display device according to claim 2, wherein the absolute value of a change rate of a level of the second drive signal at the maximum level and/or the minimum level is the minimum value. ### Claim 4 (depends on 3) The head-up display device according to claim 3, wherein, when a current level of the second drive signal approaches the maximum level and/or the minimum level, the absolute value of the change rate of the current level is gradually reduced to the minimum value. ### Claim 5 (depends on 3) The head-up display device according to claim 3, wherein, when a current level of the second drive signal deviates from the maximum level and/or the minimum level, the absolute value of the change rate of the current level is gradually increased from the minimum value. ### Claim 6 (depends on 1) The head-up display device according to claim 1, wherein the display further includes a storage unit in which fixed data necessary to generate the fixed first non-display waveform is stored, and the processing unit generates the fixed first non-display waveform based on the fixed data. ### Claim 7 (depends on 1) The head-up display device according to claim 1, wherein the processing unit changes a range of a level of the variable display waveform based on a temperature of the second scan element.