WO2017145859A1 - Dispositif de source de lumière laser et dispositif d'affichage à balayage laser - Google Patents

Dispositif de source de lumière laser et dispositif d'affichage à balayage laser Download PDF

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Publication number
WO2017145859A1
WO2017145859A1 PCT/JP2017/005263 JP2017005263W WO2017145859A1 WO 2017145859 A1 WO2017145859 A1 WO 2017145859A1 JP 2017005263 W JP2017005263 W JP 2017005263W WO 2017145859 A1 WO2017145859 A1 WO 2017145859A1
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Prior art keywords
light source
light
laser
scanning
period
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PCT/JP2017/005263
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English (en)
Japanese (ja)
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泰弘 山川
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日本精機株式会社
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Publication of WO2017145859A1 publication Critical patent/WO2017145859A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • 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
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
    • G02B26/10—Scanning systems
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/02—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes by tracing or scanning a light beam on a screen
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/74—Projection arrangements for image reproduction, e.g. using eidophor

Definitions

  • the present invention relates to a laser light source device and a laser scanning display device.
  • This type of laser scanning display device includes, for example, a light source that emits laser light, a light detection unit that detects the light intensity of the laser light, and a laser that is detected by the light detection unit, as described in Patent Document 1.
  • a control unit that realizes desired luminance and color in the display image by adjusting the output of the light source based on the light intensity of light.
  • the screen includes a visible region 801 located in the center of the screen and an invisible region 802 located on the outer periphery of the visible region 801 when viewed from the thickness direction.
  • the laser light is irradiated on the visible region 801
  • the laser light is visually recognized by reaching the user through the visible region 801.
  • the laser beam is irradiated on the invisible region 802
  • the laser beam is blocked by the time it reaches the user and is not visually recognized by the user.
  • the control unit scans the laser beam in the sub-scanning direction Y orthogonal to the main scanning direction X while reciprocating the laser light along the main scanning direction X through the scanning unit as indicated by an arrow in FIG.
  • the control unit emits detection light having a preset intensity through the light source.
  • the control unit detects the light intensity of the detection light through the light detection unit, and adjusts the output of the light source based on the detection result, thereby realizing desired luminance and color in the display image.
  • an irradiation range 702a where the detection light is irradiated is formed at a position away from the visible region 801.
  • the area of the irradiation range 702a shown in FIG. 11 is increased, so that the light from the irradiation range 702a easily becomes stray light or diffused light, and the display quality of the image is improved by reflection of the stray light or the like on the image. May decrease.
  • a sufficient amount of light detection unit is required to suitably adjust the output of the light source. There is a possibility that a detection result cannot be obtained, and as a result, desired luminance and color cannot be realized in the display image.
  • the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a laser light source device and a laser scanning display device in which the output of the light source can be suitably adjusted and the deterioration in display quality is suppressed. .
  • a laser light source device includes a light source that emits laser light, a light intensity detector that detects the light intensity of the laser light, and a reciprocation of the laser light along a main scanning direction.
  • An image is generated by scanning in the sub-scanning direction intersecting with the main scanning direction while moving, and inspection light out of the laser light is emitted through the light source in an inspection period different from the period for generating the image, and the light
  • a drive unit that adjusts the output of the light source based on the light intensity of the inspection light detected by the intensity detection unit, and the drive unit is configured to scan the laser beam during the forward pass period.
  • the laser beam is moved from the end position toward the other direction in the sub-scanning direction to reach the start position, and the inspection period is a period spanning the forward path period and the return path period.
  • a laser scanning display device includes the laser light source device and a screen on which the image is generated by scanning the laser light from the laser light source device.
  • the screen is located in the visible region where the laser beam reaches the user through the screen when irradiated with the laser beam, as viewed from the thickness direction of the screen, and on the outer periphery of the visible region, and the laser An invisible region that is blocked before the laser beam that has passed through the screen reaches a user when light is irradiated or is blocked until the laser beam is irradiated to the screen, and the termination
  • the position is located on the one direction side in the sub-scanning direction with respect to the visible area in the invisible area, and the start position is
  • the inspection area irradiated with the inspection light in the range where the laser light on the screen is scanned is positioned on the other direction side in the sub-scanning direction with respect to the visible area in the invisible area. It is formed at a position farthest from the visible region among the regions
  • the present invention it is possible to suitably control the output of the light source and suppress the deterioration of display quality.
  • (A) which concerns on one Embodiment of this invention is a graph which shows a subscanning position
  • (b) is a timing chart which shows the connection state of a switch part
  • (c) is a timing which shows the input signal to an input line It is a chart
  • (d) is a timing chart showing the emission timing of the inspection light.
  • (A), (b) which concerns on one Embodiment of this invention is a graph which shows the change of the voltage applied to the scanning part corresponding to a subscanning position
  • (c) is a timing which shows the emission timing of inspection light It is a chart. It is the front view which expanded the inspection field of the screen concerning one embodiment of the present invention.
  • FIG. 1 It is a flowchart which shows the process sequence performed by the light source control part which concerns on one Embodiment of this invention.
  • A which concerns on the modification of this invention is a graph which shows the change of the voltage applied to the scanning part corresponding to a subscanning position
  • (b) is a timing chart which shows the output timing of image data
  • (c ) Is a timing chart showing the emission timing of the inspection light. It is a side view of the screen which receives a laser beam from the scanning part which concerns on the modification of this invention. It is a front view of the screen which concerns on background art.
  • the laser scanning display device is mounted on, for example, an in-vehicle head-up display device.
  • the vehicle-mounted head-up display device projects light that represents an image generated by the laser scanning display device according to the present embodiment through an optical system, and then projects the light onto a projection member such as a windshield or a combiner.
  • the user receives light representing the image reflected by the projection member and visually recognizes the image as a virtual image.
  • the laser scanning display device 1 includes a laser light source device 10 that emits laser light K, and a scanning unit 20 that scans the laser light K emitted from the laser light source device 10. And a screen 30 that receives the laser beam K scanned by the scanning unit 20 and displays an image as a real image on the surface.
  • the screen 30 is a transmissive diffusive screen such as a microlens array, and is formed in, for example, a rectangular plate shape. Specifically, as shown in FIG. 1, the screen 30 has a rectangular frame-shaped invisible region 32 that surrounds the outer periphery of the screen 30 and a rectangular visible region 31 located in the invisible region 32 as viewed from the thickness direction. And comprising.
  • the visible region 31 of the screen 30 is a region where the light from the visible region 31 reaches the user when the laser beam K is irradiated.
  • the invisible region 32 of the screen 30 is a region where the light from the invisible region 32 is blocked by a part of a casing (not shown) or the like when the laser light K is irradiated and does not reach the user.
  • the screen 30 is not limited to a transmissive screen, and may be a reflective screen.
  • boundary lines X1, X2, Y1, and Y2 are set at the boundary between the visible region 31 and the invisible region 32 on the screen 30.
  • the boundary lines X1 and X2 extend in the sub-scanning direction Y and are positioned so as to sandwich the visible region 31 in the main scanning direction X.
  • the boundary lines Y1 and Y2 extend in the main scanning direction X and are positioned so as to sandwich the visible region 31 in the sub-scanning direction Y.
  • the main scanning direction X is along the longitudinal direction of the screen 30, that is, the horizontal direction in FIG. 1
  • the sub-scanning direction Y is along the short side direction of the screen 30, that is, the vertical direction in FIG.
  • the scanning unit 20 is configured by, for example, a MEMS (Micro Electro Mechanical System) scanner. As shown in FIG. 1, the scanning unit 20 includes a mirror surface 20a, and is configured to be able to vibrate the mirror surface 20a. As the MEMS scanner, any of a piezoelectric type, an electromagnetic type, and an electrostatic type may be adopted.
  • the scanning unit 20 reflects the laser light K toward the screen 30 through the mirror surface 20a, and further scans the laser light K on the screen 30 by vibrating the mirror surface 20a.
  • the scanning unit 20 scans the laser light K from the laser light source device 10 along the main scanning direction X and the sub-scanning direction Y as indicated by the broken line in FIG. 1 under the control of the laser light source device 10. Thus, an image is generated on the screen 30.
  • the scanning by the scanning unit 20 will be described in detail later.
  • the scanning unit 20 includes a scanning position detection unit 20 b that detects the scanning position of the laser light K in the main scanning direction X and the sub-scanning direction Y.
  • the scanning position detection unit 20b outputs the detection result as scanning information to the laser light source device 10 (more precisely, the display control unit 14 described later).
  • the laser light source device 10 includes, for example, a light source 11 composed of a plurality of semiconductor laser light sources that emit laser light K of different colors of blue, green, and red, and laser light K (inspection light Ka).
  • a light intensity detector 12 including a photodiode for detecting the light intensity of the light source 11 and a drive unit 18 that generates an image on the screen 30 by driving the scanning unit 20 and the light source 11 in synchronization.
  • the drive unit 18 synchronizes the light source control unit 13 that adjusts the output of the light source 11 based on the light intensity detected by the light intensity detection unit 12 and the scanning position of the scanning unit 20 while controlling the scanning unit 20. Therefore, the display controller 14 that generates an image by turning on the light source 11 at a desired timing, the constant voltage generation circuit 15 that outputs a constant voltage signal Sb having a constant voltage level, and the input line 111 of the light source 11 are connected. And a switch unit 16 that switches the target to be switched between the constant voltage generation circuit 15 and the display control unit 14.
  • the light intensity detection unit 12 is disposed on an optical path of light divided in a direction not directed to the scanning unit 20 out of the laser light K directed from the laser light source device 10 to the scanning unit 20.
  • the light intensity detection unit 12 includes an integration circuit 12a.
  • the integration circuit 12 a integrates the light intensity of the inspection light Ka detected by the light intensity detection unit 12 with time, and outputs the integrated light intensity to the light source control unit 13.
  • the switch unit 16 is composed of an analog switch such as a field effect transistor, for example.
  • the switch unit 16 switches the input line 111 of the light source 11 to a state connected to either the display control unit 14 or the constant voltage generation circuit 15 under the control of the light source control unit 13.
  • the constant voltage generation circuit 15 is a circuit that generates a constant voltage signal Sb having a constant voltage level from a power source (not shown).
  • the constant voltage generation circuit 15 is connected to the input line 111 of the light source 11 through the switch unit 16, thereby supplying the constant voltage signal Sb to the light source 11 via the input line 111.
  • the light source 11 receives the constant voltage signal Sb and emits the inspection light Ka. That is, the inspection light Ka is the laser light K emitted when the constant voltage signal Sb is supplied to the light source 11.
  • the constant voltage signal Sb of the constant voltage generation circuit 15 may be variable based on a predetermined condition.
  • the constant voltage generation circuit 15 may be configured by a pulse voltage generation circuit that generates a pulse voltage signal that periodically outputs a plurality of voltage levels.
  • the light source control unit 13 is configured by, for example, a microcontroller and adjusts the output of the light source 11 in response to the light intensity detected by the light intensity detection unit 12. By adjusting the output of the light source 11 in this way, a desired luminance and color (for example, white balance) can be realized in an image generated on the screen 30.
  • the light source control unit 13 inputs information regarding the scanning position from the scanning unit 20 via the display control unit 14 and operates the switch unit 16 based on the scanning position of the scanning unit 20.
  • the control of the switch unit 16 by the light source control unit 13 will be described in detail later.
  • the display control unit 14 can control the light source 11 with 256 gradation levels, and by driving the light source 11 at a timing in accordance with the scanning of the scanning unit 20, each pixel of the image has a desired luminance and color. Displayed with the laser beam K of (white balance).
  • the display control unit 14 is configured by, for example, an FPGA (Field Programmable Gate Array) or an ASIC (Application Specific Integrated Circuit).
  • the display control unit 14 stores light source control data (not shown) in which 256 gradation levels and current control data for driving each light source 11 are associated with each other.
  • each pixel of the image is displayed in a color with 256 gradations of blue, 256 gradations of green, and 256 gradations of red. To do.
  • the display control unit 14 emits the laser light K through the light source 11 and operates the scanning unit 20 by applying a voltage to the scanning unit 20, thereby causing the laser light K to scan on the screen 30.
  • the laser beam K is positioned on the screen 30 at the start and end of one frame F, which is a control unit, and the start position Ps is positioned at one corner of the screen 30.
  • an end position Pe located at the other corner located on the diagonal of that one corner.
  • one corner of the screen 30 is the upper left corner of FIG. 2
  • the other corner of the screen 30 is the lower right corner of FIG.
  • the laser beam K that starts at the same time as the forward path period Ta until the laser beam K reaches the end position Pe from the start position Ps and the forward period Ta is generated. And a return period Tb from the end position Pe to the start position Ps.
  • This frame F is repeated during the period when the image is displayed on the screen 30.
  • the display control unit 14 reciprocates the laser light K along the main scanning direction X from the start position Ps to the end position Pe in one direction Y1 in the sub-scanning direction Y (downward in FIG. 2). Scan to move to.
  • the display control unit 14 reciprocates the laser light K along the main scanning direction X from the end position Pe to the start position Ps in the return period Tb, and the other direction Y2 in the sub-scanning direction Y (upward direction in FIG. 2). Scan to move to.
  • the scanning speed in the main scanning direction X is higher than the scanning speed in the sub-scanning direction Y.
  • the scanning speed in the sub-scanning direction Y in the return path period Tb is higher than the scanning speed in the sub-scanning direction Y in the forward path period Ta. Therefore, the return path period Tb is set to a period shorter than the forward path period Ta.
  • the display control unit 14 inputs scanning information from the scanning position detection unit 20b of the scanning unit 20, and sets the scanning positions Px and Py of the scanning unit 20 in the main scanning direction X and the sub scanning direction Y included in the scanning information. recognize.
  • the scanning positions Px and Py of the scanning unit 20 are in the visible region 31 (specifically, the main scanning position Px is between the boundary line X1 and the boundary line X2 and the sub-scanning position is displayed).
  • Py is between the boundary line Y1 and the boundary line Y2
  • the light source 11 is driven to display an image.
  • the display control unit 14 displays the recognized sub-scanning position Py as indicated by the scanning position P1 in FIG. 2 during the drawing period in which the recognized sub-scanning position Py is located between the boundary line Y1 and the boundary line Y2.
  • the drive signal Sa1 for driving the light source 11 according to the image data is output to the input line 111 of the light source 11 as the normal drive signal Sa.
  • the display control unit 14 stops the driving of the light source as the normal driving signal Sa when the recognized main scanning position Px is in the invisible region 32 as shown by the scanning position P2 in FIG. Sa2 is output to the input line 111 of the light source 11.
  • the light source 11 emits the laser light K according to the image data when receiving the driving signal Sa1, and stops emitting the laser light K when receiving the stop signal Sa2.
  • the switch unit 16 is always set to be connected to the display control unit 14 by the unit 13.
  • the drive signal Sa1 is output to the input line 111 of the light source 11 in the period T1 in which the main scanning position Px is in the visible region 31,
  • the stop signal Sa2 is output to the input line 111 of the light source 11.
  • an inspection area A1 is formed at the end of the screen 30 on the one side Y1 side in the sub-scanning direction Y.
  • the inspection area A1 is located farthest from the visible area 31 in the screen 30 in the sub-scanning direction Y, and forms a rectangle having a long side having the same length as the longitudinal direction of the screen 30.
  • the light source controller 13 is shown in FIG. 5B during the period (inspection period T3) in which the sub-scanning position Py recognized through the display controller 14 is located in the inspection area A1.
  • the input line 111 of the light source 11 is connected to the constant voltage generation circuit 15 through the switch unit 16.
  • the constant voltage signal Sb from the constant voltage generation circuit 15 is always supplied to the input line 111 regardless of the main scanning position Px.
  • the inspection light Ka is emitted from the light source 11 by the constant voltage signal Sb.
  • FIGS. 6A and 6B show a change in the voltage Vy applied to the scanning unit 20 corresponding to the sub-scanning position Py.
  • the maximum voltage Vmax is applied to the scanning unit 20 at time tp when the laser beam K is located at the end position Pe
  • the minimum voltage is applied to the scanning unit 20 at time tq when the laser beam K is located at the start position Ps.
  • Vmin is applied.
  • the inspection period T3 includes a time tp when the laser beam K reaches the end position Pe, and is set so as to straddle the return path period Tb and the return path period Tb. Yes.
  • the inspection period T3 is set to a period during which the detection result of the light intensity detector 12 can be obtained by an amount sufficient for adjusting the output of the light source 11.
  • the forward scanning line La that is the inspection light Ka toward the end position Pe in the forward period Ta.
  • the return scanning line Lb which is the inspection light Ka returning to the start position Ps in the return path period Tb, is formed so as to overlap.
  • the forward scanning line La and the backward scanning line Lb overlap in the inspection region A1, thereby reducing the area of the inspection region A1 while securing the length of the scanning line in the inspection period T3 and the inspection period T3. Can do.
  • the light source controller 13 inputs the scanning information from the scanning position detector 20b through the display controller 14 (step S101). Then, the light source control unit 13 determines whether or not the scanning positions Px and Py included in the scanning information are within the inspection area A1 (step S102). In step S102, the light source control unit 13 may determine whether or not the inspection area A1 is within the scanning area P1 by referring to only the sub-scanning position Py among the scanning positions Px and Py. When the light source control unit 13 determines that the scanning positions Px and Py included in the scanning information are not within the inspection area A1 (NO in S102), the process returns to step S101. That is, the light source control unit 13 repeats the processes of steps S101 and S102 with the switch unit 16 connected to the display control unit 14 until the scanning positions Px and Py are within the inspection area A1.
  • the light source controller 13 determines that the scanning positions Px and Py included in the scanning information are within the inspection region A1 (YES in S102)
  • the light source controller 13 inspects the light source 11 by connecting the switch unit 16 to the constant voltage generation circuit 15.
  • the light Ka is emitted.
  • the light source control part 13 inputs the light intensity information from the light intensity detection part 12 (step S104).
  • the light source control unit 13 compares the light intensity included in the light intensity information with a preset reference light intensity, and calculates a correction value based on the comparison result (step S105).
  • the light source control unit 13 adjusts the output of the light source 11 based on the calculated correction value (step S106), and ends the processing according to the flowchart.
  • the light source controller 13 stops the emission of the inspection light Ka when the scanning positions Px and Py included in the scanning information are outside the inspection area A1.
  • the light source control unit 13 drives the light source 11 with the adjusted output in accordance with the image data input from the image generation unit 2.
  • the laser light source device 10 includes a light source 11 that emits laser light K, a light intensity detection unit 12 that detects the light intensity of the laser light K, and a reciprocating motion of the laser light K along the main scanning direction X.
  • An image is generated by scanning in the sub-scanning direction Y crossing the main scanning direction X, and the inspection light Ka is emitted from the laser light K through the light source 11 in the inspection period T3 different from the period in which the image is generated.
  • a drive unit 18 that adjusts the output of the light source 11 based on the light intensity of the inspection light Ka detected by the detection unit 12.
  • the drive unit 18 moves the laser beam K from the start position Ps toward the one direction Y1 in the sub-scanning direction Y during the forward path period Ta to reach the end position Pe.
  • the return pass period Tb that repeats alternately and continuously with the period Ta, the laser beam K is moved from the end position Pe toward the other direction Y2 in the sub-scanning direction Y to reach the start position Ps.
  • the inspection period T3 is set to a period extending over the forward path period Ta and the return path period Tb. According to this configuration, as illustrated in FIG.
  • the inspection period T3 is set to a period spanning the forward path period Ta and the return path period Tb so as to include the time tp when the inspection light Ka reaches the end position Pe. According to this configuration, since the laser light source device 10 immediately enters the drawing period after the inspection period T3 has elapsed and the output adjustment of the light source 11 is completed, an image that quickly reflects the output adjustment of the light source 11 is displayed. Can be generated.
  • the light intensity detection unit 12 includes an integration circuit 12a that integrates the detected light intensity of the inspection light Ka with time and outputs the integrated light intensity of the inspection light Ka to the drive unit 18. By integrating the detected light intensity with time, the detected light intensity, and hence the brightness of the laser light K from the light source 11, can be stabilized.
  • the laser scanning display device 1 includes a laser light source device 10 and a screen 30 that generates an image by scanning the laser light K from the laser light source device 10.
  • the screen 30 is positioned in the visible region 31 where the laser beam K reaches the user through the screen 30 when the laser beam K is irradiated when viewed from the thickness direction of the screen 30, and the laser is positioned on the outer periphery of the visible region 31. And an invisible region 32 that is blocked before the laser light K that has passed through the screen 30 reaches the user when the light K is irradiated.
  • the end position Pe is located on the Y1 side (lower side in FIG.
  • the start position Ps is sub-scanned from the visible area 31 in the invisible area 32. It is located on the other direction Y2 side (the upper side in FIG. 2) of the direction Y. Further, in the range where the laser beam K is scanned on the screen 30, the inspection area A ⁇ b> 1 irradiated with the inspection light Ka is formed at a position farthest from the visible area 31 in the invisible area 32. According to this configuration, stray light or the like is prevented from entering the visible region 31 based on the inspection light Ka, and as a result, deterioration in image display quality can be suppressed.
  • the light source control unit 13 emits the inspection light Ka when the scanning positions Px and Py are within the inspection area A1 based on the scanning positions Px and Py included in the scanning information from the scanning position detection unit 20b.
  • the emission timing of the inspection light Ka may be determined by other methods. For example, as illustrated in FIG. 9A, the light source control unit 13 determines that the voltage Vy applied to the scanning unit 20 corresponding to the sub-scanning position Py is a predetermined value (in the example of FIG. 9A, the minimum voltage Vmin).
  • the measurement of the time may be started from the reference time t1 taking (), and when the time reaches a certain time Tc, the emission of the inspection light Ka may be started as shown in FIG.
  • the fixed time Tc is set to a time from the reference time t1 to the start of the inspection period T3.
  • the light source control unit 13 starts measuring time from the reference time t2 of the image data input from the image generation unit 2, and the time reaches a certain time Tc.
  • the emission of the inspection light Ka may be started.
  • the fixed time Tc is set to a time from the reference time t2 to the time when the inspection period T3 starts.
  • the reference time t2 is set at the end of image data output. In these configurations, the scanning position detector 20b may be omitted.
  • the light source control unit 13 starts measuring time from the reference time when the scanning positions Px and Py included in the scanning information reach a predetermined position, and when the time reaches a certain time, the light source control unit 13 The emission may be started.
  • the light source control unit 13 also measures the time from the reference times t1 and t2 for the emission stop timing of the inspection light Ka, and when the measured time reaches a certain time, the inspection light Ka is measured.
  • the emission of the inspection light Ka may be stopped when a certain time has elapsed from the start of the emission of the inspection light Ka.
  • the light source control unit 13 may count the scanning lines in the main scanning direction X, and recognize the scanning positions Px and Py and the inspection period T3 based on the count number.
  • the light source 11 emits laser light K of three primary colors of blue, green, and red.
  • laser light K of four or more colors including white, yellow, etc. can be emitted. It may also be one that emits two colors of laser light K.
  • the light intensity detector 12 includes the integration circuit 12a, but the integration circuit 12a may be omitted.
  • the inspection period T3 is set to include the time tp when the inspection light Ka reaches the end position Pe, but includes the time tq when the inspection light Ka reaches the start position Ps. May be set. Even in this configuration, as in the above-described embodiment, it is possible to suitably adjust the output of the light source 11 and to suppress a reduction in image display quality. Further, the light source control unit 13 may emit the inspection light Ka in the inspection period T3 including the time tp and the inspection period T3 including the time tq.
  • the return trip period Tb is set to a period shorter than the forward trip period Ta, but the present invention is not limited to this, and the return trip period Tb may be set to a period longer than the forward trip period Ta.
  • the scanning speed in the sub-scanning direction Y in the forward pass period Ta is set to be equal to or higher than the scanning speed in the sub-scanning direction Y in the return pass period Tb.
  • the invisible region 32 of the screen 30 is irradiated with the laser light K from the laser light source device 10 to block light from the invisible region 32 of the screen 30 toward the user.
  • the light directed to the invisible region 32 of the screen 30 is blocked by the light shielding wall 40 formed by a part of the housing shown in FIG. 10 to prevent the inspection light Ka from being visually recognized by the user. Also good.
  • the light shielding wall 40 does not need to be provided in the entire invisible region 32, and may be provided at least in a region where the inspection light Ka directed from the scanning unit 20 toward the inspection region A1 of the screen 30 can be shielded.
  • the laser scanning display device 1 inputs an image signal indicating an image from the image generation unit 2 that is separate from the laser scanning display device 1 and displays an image based on the image signal. It was.
  • the laser scanning display device 1 may have a function as a graphic controller. In this case, an information signal indicating predetermined information is input, and the laser scanning display device 1 based on the information signal (specifically, Specifically, the display control unit 14) may generate image data and display an image.
  • the present invention can be applied to a laser light source device and a laser scanning display device used in an in-vehicle head-up display device or the like.

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Abstract

La présente invention concerne un dispositif de source de lumière laser et un dispositif d'affichage à balayage laser, la sortie de la source de lumière pouvant être ajustée de manière appropriée tout en minimisant la dégradation de qualité de l'affichage. Le dispositif de source de lumière laser comprend : une source de lumière qui émet une lumière laser ; une unité de détection d'intensité lumineuse qui détecte l'intensité lumineuse de la lumière laser ; et une unité de commande qui génère une image en faisant aller et venir la lumière laser le long de la direction de balayage principal X tout en balayant la lumière laser le long de la sous-direction de balayage Y, amène une lumière d'inspection parmi la lumière laser à être émise pendant une période d'inspection, et ajuste la sortie de la source de lumière sur la base de l'intensité lumineuse détectée de la lumière d'inspection. L'unité de commande amène la lumière laser à atteindre une position finale Pe par déplacement de la lumière laser depuis une position de départ Ps le long d'une direction Y1 de la sous-direction de balayage Y pendant une période de sortie, et amène la lumière laser à atteindre la position de départ Ps par déplacement de la lumière laser depuis la position finale Pe le long de l'autre direction Y2 de la sous-direction de balayage Y pendant une période de retour. La période d'inspection est établie pour couvrir les périodes de sortie et de retour.
PCT/JP2017/005263 2016-02-23 2017-02-14 Dispositif de source de lumière laser et dispositif d'affichage à balayage laser WO2017145859A1 (fr)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1178117A (ja) * 1997-09-12 1999-03-23 Fuji Xerox Co Ltd 画像形成装置及び画像形成方法
JP2010079198A (ja) * 2008-09-29 2010-04-08 Brother Ind Ltd 画像投影装置
JP2014086426A (ja) * 2012-10-19 2014-05-12 Nippon Seiki Co Ltd レーザー出力制御装置及びレーザー走査型表示装置
JP2014130257A (ja) * 2012-12-28 2014-07-10 Jvc Kenwood Corp 画像表示装置、画像表示方法及びプログラム
JP2015031782A (ja) * 2013-08-01 2015-02-16 株式会社リコー 画像表示装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1178117A (ja) * 1997-09-12 1999-03-23 Fuji Xerox Co Ltd 画像形成装置及び画像形成方法
JP2010079198A (ja) * 2008-09-29 2010-04-08 Brother Ind Ltd 画像投影装置
JP2014086426A (ja) * 2012-10-19 2014-05-12 Nippon Seiki Co Ltd レーザー出力制御装置及びレーザー走査型表示装置
JP2014130257A (ja) * 2012-12-28 2014-07-10 Jvc Kenwood Corp 画像表示装置、画像表示方法及びプログラム
JP2015031782A (ja) * 2013-08-01 2015-02-16 株式会社リコー 画像表示装置

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