JP2013195797A - Light source device, projector and light source control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively use a period of time when color of a light source switches due to rotation of a color wheel, to prevent reduction in luminance, and to improve expression of chroma.SOLUTION: The light source device includes: an LD array 31 in which multiple light emitting elements for emitting light of the same color are arranged in first-third divisions; a color wheel 38 which is made up of multiple color filters 38g, 38b and emits light of multiple colors by time sharing, by radiating light emitted by the LD array 31; and a projection processing part (13) for individually driving the LDs of the first-third divisions at different light emission timing, according to timing when light emitted by the respective LDs of the first-third divisions passes a boundary position of the multiple color filters 38g, 38b.

Description

  The present invention relates to a light source device, a projection device, and a light source control method particularly suitable for a DLP (Digital Light Processing) (registered trademark) projector using a color wheel.

  In recent years, DLP (registered trademark) projector devices using micromirror elements have been widely used in place of liquid crystal projector devices.

  In this type of DLP (registered trademark) projector device, in a so-called “single plate” type device in which one micromirror element is used as a spatial light modulation element, light from the light source element is called a color wheel. In many cases, the color filter is configured to generate light of a plurality of colors that are time-divided by interposing a mechanism that is divided and arranged on the circumference of the rotating disk.

  FIG. 5 shows a configuration example of a part of a light source unit using a color wheel and an operation example thereof. In FIG. 1A, reference numeral 1 denotes an LD in which a plurality of LDs (laser diodes), which are semiconductor light emitting elements emitting blue laser light, for example, a total of 24 x 8 (in the vertical direction in the drawing) are arranged in an array. An array.

  The individual blue laser beams emitted from the LD array 1 are reflected at 90 ° angles by the mirror array 2 arranged stepwise so as to face the LD array 1, and are condensed by the lenses L1 and L2 to be parallel. Then, the light passes through the dichroic mirror 3 and is further irradiated onto the peripheral surface of the fluorescent wheel 4 as a part of the light source through the lenses L3 and L4.

  The fluorescent wheel 4 is rotated by the drive of the motor (M) 5, and as shown in FIG. 5C, a diffusing plate 4b for transmission and a phosphor layer 4g are arranged in a divided area on the peripheral surface. ing. At the peripheral surface position where the phosphor layer 4g of the phosphor wheel 4 is present, the phosphor is applied to the surface irradiated with the laser light from the LD array 1 to form the phosphor layer, and the phosphor layer is formed. A reflection plate is provided on the back surface of the surface so as to overlap the phosphor layer.

  When there is a phosphor layer 4g of the fluorescent wheel 4 on the optical path of the laser light from the LD array 1, the phosphor layer 4g is excited by irradiation with blue laser light and emits green light. The green light emitted from the fluorescent wheel 4 is uniformly guided to the lenses L3 and L4 by the reflecting plate formed on the back side of the fluorescent wheel 4 and reflected by the dichroic mirror 3.

  On the other hand, when the diffusing plate 4b for transmission of the fluorescent wheel 4 is on the optical path of the laser light from the LD array 1 as described above, the blue laser light transmitted through the diffusing plate 4b for transmission and diffused The light beam is made parallel through L5 and reflected by the mirror 6 at an angle of 90 °.

  As described above, FIG. 5A shows a partial configuration of the light source unit, and includes, for example, an LED (not shown) that emits red light in addition to the LD array 1 as a light emitting element. The LEDs emitting red light and the LD array 1 are driven to emit light in a time-sharing manner, and the rotation phase of the fluorescent wheel 4 is synchronized with the light emission of the LD array 1 so that R, G, B from the light source unit can be synchronized. Primary color light can be emitted to a micromirror element (not shown) in a time-sharing manner.

  FIG. 5B shows an example of the arrangement of the LD array 1 composed of a total of 24 LDs, for example, 8 × 3 columns. Semiconductor light emitting devices such as LEDs and LDs have different forward drop voltages depending on the individual, and connecting a plurality of devices in parallel causes destruction of the devices, so that they are basically connected in series. As shown in “column 1” to “column 3” in FIG. 5B, the LD array 1 divides eight LDs connected in series into three columns and drives each column.

  FIG. 5C shows a condensing point position where the laser light from the LD array 1 is irradiated on the phosphor layer 4g on the fluorescent wheel 4 rotating in the direction of arrow A or the diffusing plate 4b for transmission. The light source shape of is shown. It can be understood that the actual condensing position on the fluorescent wheel 4 varies depending on the position of the LD row constituting the LD array 1.

  In this case, the boundary between the phosphor layer 4g of the fluorescent wheel 4 and the diffusing plate 4b for transmission is condensed in the arrangement direction, which is the direction in which the “array 1” to “array 3” of the LD array 1 are arranged as a whole. The point positions are arranged so as to coincide with the moving direction.

  Accordingly, when each column of the LD array 1 is driven to emit light at the same time, the boundary between the phosphor layer 4g of the fluorescent wheel 4 and the diffusing plate 4b for transmission is the condensing point of “column 3” and the collection of “column 2”. The position is moved in the order of the light spot and the condensing point of “column 1”.

  FIG. 6 shows the light source color obtained by the light emission for each column of the LD array 1 and the LD when one frame of the projected image is configured in the order of R, G, B fields (FIG. 6A). 4 is a timing chart showing light source colors obtained in the entire array 1.

  As shown in FIGS. 6B to 6D, the boundary position between the phosphor layer 4 g and the transmissive diffusion plate 4 b that accompanies the rotation of the fluorescent wheel 4 is the light condensing from “row 3” of the LD array 1. Since the light reaches the point first, and then reaches the condensing point position from “Row 2” and the condensing point position from “Row 1”, the green light and blue light emitted from each condensing point position as shown in FIG. The emission timing is different.

  Accordingly, as shown in FIG. 6 (E), the light emitted from the light source unit in the spoke period SP between the G and B fields is a mixed color of green (G) and blue (B), and a complementary color of red (R). Becomes cyan (Cy).

  Therefore, in the projector using the light source unit configured as described above, the brightness of the projected image is improved by displaying an image corresponding to the cyan color with the micromirror element in the spoke period SP located between the G and B fields. it can.

  On the other hand, since the spoke period SP positioned between the primary color fields must be a period for projecting a complementary color image, the expressive power in the projection mode in which saturation is required rather than the brightness of the image is reduced. .

  In order to overcome this type of problem and enable a clear image to be projected, a technique is conceived in which light emission is intentionally stopped for a very short time at the timing of the spoke period when the color of the primary color light on the light source side is switched. Yes. (For example, Patent Document 1)

JP 2010-085745 A

  The technique described in the above-mentioned patent document is designed to avoid a reduction in saturation expression power by intentionally stopping the light emission in the spoke period when a complementary color image must be projected by color mixing. Yes, the brightness of the projected image is reduced by the amount of light emission of the spokes.

  The present invention has been made in view of the above circumstances, and the object of the present invention is to effectively utilize the period during which the color of the light source is switched, to prevent a decrease in luminance and to improve the ability to express saturation. It is an object of the present invention to provide a light source device, a projection device, and a light source control method capable of performing the above.

  According to one embodiment of the present invention, a plurality of light emitting elements that emit light of the same color are formed of a light emitting unit arranged in a state of being divided into a first section and a second section, and a plurality of color filters. Timing when each of the color wheel that emits light of a plurality of colors in a time-division manner when irradiated with light emitted and the light-emitting elements of the first section and the second section pass through the boundary positions of the plurality of color filters And a light source driving unit for controlling the light emitting unit so as to drive the light emitting elements of the first and second sections at different light emission timings.

  According to the present invention, it is possible to effectively use the period during which the color of the light source is switched, to prevent a decrease in luminance, and to improve the ability to express saturation.

1 is a block diagram showing a schematic functional configuration of a data projector apparatus according to an embodiment of the present invention. The figure which shows the structural example of the light source part which concerns on the same embodiment. 4 is a timing chart showing a relationship between a light source color obtained by light emission for each column of the LD array according to the embodiment and a light source color obtained in the entire LD array. The figure which shows the relationship between the light emission timing for every column of the LD array which concerns on the embodiment, and the light source color obtained by the whole. The figure which shows the partial structure and operation | movement of a projector light source part of a DLP (trademark) system. 6 is a timing chart showing a relationship between a light source color obtained by light emission for each column of the LD array in the configuration of FIG. 5 and a light source color obtained in the entire LD array.

  An embodiment in which the present invention is applied to a DLP (registered trademark) data projector apparatus will be described below with reference to the drawings.

  FIG. 1 is a diagram showing a schematic functional configuration of a data projector apparatus 10 according to the present embodiment. The input unit 11 includes, for example, a pin jack (RCA) type video input terminal, a D-sub 15 type RGB input terminal, and the like. Analog image signals of various standards input to the input unit 11 are digitized by the input unit 11 and then sent to the image conversion unit 12 via the system bus SB.

  The image conversion unit 12 is also referred to as a scaler, and the input image data is unified into image data of a predetermined format suitable for projection and sent to the projection processing unit 13.

  The projection processing unit 13 multiplies a frame rate according to a predetermined format, for example, 60 [frames / second], the number of color component divisions, and the number of display gradations according to the transmitted image data. The micromirror element 14 is driven to display by a time-sharing drive.

  This micromirror element 14 is turned on / off individually at a high speed for each inclination angle of a plurality of micromirrors arranged in an array, for example, WXGA (Wide eXtended Graphics Array) (horizontal 1280 pixels × vertical 800 pixels). By displaying the image, an optical image is formed by the reflected light.

On the other hand, light of a plurality of colors including primary color lights of R, G, and B is sequentially emitted in a time division manner from the light source unit 15 in a time division manner. The light from the light source unit 15 is totally reflected by the mirror 16 and applied to the micromirror element 14.
Then, an optical image is formed by the reflected light from the micromirror element 14, and the formed optical image is projected and displayed on a screen (not shown) to be projected via the projection lens unit 17.

  Note that the projection processing unit 13 directly executes control such as drive timing of the light emitting elements in the light source unit 15 described later under the control of the CPU 18.

  The CPU 18 controls all the operations of the above circuits. The CPU 18 is directly connected to the main memory 19 and the program memory 20. The main memory 19 is composed of, for example, an SRAM and functions as a work memory for the CPU 18. The program memory 20 is composed of an electrically rewritable nonvolatile memory, and stores an operation program executed by the CPU 18 and various fixed data. The CPU 18 uses the main memory 19 and the program memory 20 to execute control operations in the data projector device 10.

The CPU 18 performs various projection operations according to key operation signals from the operation unit 21.
The operation unit 21 includes a key operation unit provided in the main body of the data projector device 10 and an infrared light receiving unit that receives infrared light from a remote controller (not shown) dedicated to the data projector device 10. A key operation signal based on a key operated by the key operation unit or the remote controller is directly output to the CPU 18.

  The CPU 18 is further connected to the audio processing unit 22 via the system bus SB. The sound processing unit 22 includes a sound source circuit such as a PCM sound source, converts the sound data given during the projection operation into an analog signal, drives the speaker unit 23 to emit a loud sound, or generates a beep sound or the like as necessary.

The configuration of the optical system when the light source unit 15 is configured using two types of semiconductor light emitting elements will be described with reference to FIG.
The light source unit 15 includes, as a light source, an LD (laser diode, semiconductor laser) array 31 that is a semiconductor light emitting element that emits blue laser light.
In this LD array 31, for example, a total of 24 LDs of 8 × 3 (in the vertical direction in the drawing) are arranged in an array, and three LDs are connected in series in units of eight, and light emission is driven. That is, the light emission is driven in units of sections in a state where the LD is divided into three sections.

  The blue laser light emitted from the LD array 31 is reflected at an angle of 90 ° by the mirror array 32 arranged in a stepped manner so as to face the LD array 31, condensed by the lenses 33 and 34, and a parallel light beam. Then, the light passes through the dichroic mirror 35 and is irradiated onto the peripheral surface of the color wheel 38 as a part of the light source through the lenses 36 and 37.

  The color wheel 38 is rotated by driving a motor (M) 39 which is a rotation driving unit, and a transmission diffusion plate (color filter) 38b and a phosphor layer (color filter) 38g are divided into regions on the peripheral surface. Arranged. The configuration of the color wheel 38 is basically the same as that of the transmissive diffusion plate 4b and the phosphor layer 4g of the fluorescent wheel 4 shown in FIG.

  The rotation synchronization of the color wheel 38 is controlled by the projection processing unit 13 detecting and rotating the marker formed on the peripheral surface (not shown).

  At the peripheral surface position where the phosphor layer 38g of the color wheel 38 is located, the phosphor is applied to the surface irradiated with the laser light from the LD array 31 to form the phosphor layer, and the phosphor layer 38g is formed. A reflective plate is provided on the back surface of the surface to overlap the phosphor layer.

  When the phosphor layer 38g of the color wheel 38 is on the optical path of the laser light from the LD array 31, the phosphor layer 38g is excited by irradiation with blue laser light and emits green light.

  The green light emitted from the color wheel 38 is uniformly guided to the lenses 36 and 37 side by the reflecting plate formed on the back side of the phosphor layer 38g and reflected by the dichroic mirror 35.

  The green light reflected by the dichroic mirror 35 is reflected by the dichroic mirror 42 through the lens 41, and then passes through the lens 43 through the integrator 44 to become a light flux having a uniform luminance distribution. The green light emitted from the integrator 44 is further reflected by the mirror 46 via the lens 45, reflected by the mirror 16 via the lens 47, and then irradiated to the micromirror element 14 via the lens 48.

  An optical image is formed by the reflected light from the micromirror element 14 toward the projection lens unit 17, and the optical image is not projected by the projection lens unit 17 via the lens 48. Irradiated to the screen.

  Further, when the transmission diffusion plate 38 b of the color wheel 38 is on the optical path of the laser light from the LD array 31, the blue light transmitted through the diffusion plate 38 b while being diffused is mirrored through the lens 50. After being reflected by 51 and further reflected by the mirror 53 via the lens 52, the light passes through the dichroic mirror 42, passes through the integrator 44 via the lens 43, and becomes a luminous flux having a uniform luminance distribution. The blue light emitted from the integrator 44 is further reflected by the mirror 46 via the lens 45 and reaches the mirror 16 via the lens 47.

Further, the light source unit 15 includes an LED (light emitting diode) 55, which is a semiconductor light emitting element that emits red light, as a light source.
The red light emitted from the LED 55 passes through the dichroic mirror 35 through the lenses 56 and 57, is reflected by the dichroic mirror 42 through the lens 41, and then passes through the integrator 44 through the lens 43. The light distribution is uniform. The red light emitted from the integrator 44 is further reflected by the mirror 46 via the lens 45 and reaches the mirror 16 via the lens 47.

Next, the operation of the above embodiment will be described.
In order to simplify the description, the arrangement and lighting sequence of the LD array 31 constituting the light source unit 15, the configuration of the color wheel 38, the column position of the condensing point, and the like are almost the same as those described in FIG. It shall be the same.

  That is, the light source unit 15 includes a total of 24 LDs of 8 × 3 (vertical direction in the drawing) arranged in an array, and each of the eight LDs is divided into three rows, and each of “row 1” to “row 3” is divided. It has an LD array 31 that is driven to emit light.

  At the condensing point position of the light of the LD array 31 irradiated toward the color wheel 38, the arrangement direction in which the condensing positions of “row 1” to “row 3” are arranged, The color wheel 38 and the light source unit 15 are formed so that the boundary between the phosphor layer 38g and the transmissive diffusion plate 38b coincides with the direction in which the light converging positions of the "row 1" to "row 3" move. .

  FIG. 3 shows the light source color obtained by light emission for each column of the LD array 31 when one frame of the projection image is composed of three fields of primary colors R, G, and B (FIG. 3A), and LD 4 is a timing chart showing the relationship of light source colors obtained in the entire array 31.

  As shown in FIG. 3B, each LD belonging to “column 1” (first division) of the LD array 31 has “column 1” to “column 3” in the spoke period SP from the G field to the B field. ”, The boundary BD1 between the phosphor layer 38g of the color wheel 38 and the transmissive diffusion plate 38b passes through the slowest time, and therefore continues to be on (lights on) until the timing t2 and t3 of the G field period from the previous timing t1. After that, the signal is turned off (lights off) at timing t4 when the B field is reached, and turned on again at timing t5 after the end of the subsequent spoke period SP.

  As shown in FIG. 3C, each LD belonging to “column 2” (second section) of the LD array 31 continues from the previous timing t1 in the spoke period SP from the G field to the B field. Then, it is turned on (lights on) until the timing t2 until the middle of the G field period, turned off (lights off) at the timing t3 in the remaining G field, and then turned on at the timing t4 when it becomes the B field.

  Further, as shown in FIG. 3D, each LD belonging to “column 3” (third section) of the LD array 31 has “column 1” to “column” in the spoke period SP from the G field to the B field. 3 ", since the boundary BD1 between the phosphor layer 38g of the color wheel 38 and the diffusing plate 38b for transmission passes through the earliest time, the G field period remaining after entering the spoke period SP after turning on at the timing t1 before that. After turning off (lights off) at the timings t2 and t3, the signals are turned on at the timing t4 when the B field is reached.

  FIG. 4 shows the condensing positions of “row 1” to “row 3” of the LD array 31, the phosphor layer 38g of the color wheel 38, and the diffusing plate for transmission at timings t1 to t5 before and after the spoke period SP. The correspondence relationship between the passing position state of the boundary BD1 with respect to 38b, the on / off state of each column, and the projection color emitted as a result from the light source unit 15 is shown with reference to the conventional projection color shown in FIG. FIG.

  At the timing t1 before the spoke period SP where the boundary BD1 between the phosphor layer 38g of the color wheel 38 and the diffusing plate for transmission 38b has not yet reached the condensing point position, each of “column 1” to “column 3” All the LDs are on (lighted), and the light source light emitted as the light source unit 15 is green.

  Subsequently, the spoke period SP is entered, and at the timing t2 when the boundary BD1 passes through the “row 3” position, the LDs belonging to the “row 3” are turned off (turned off), and the “row” where the boundary BD1 has not yet reached. By turning on (lighting) each LD belonging to “1” and “row 2”, the light source light emitted as the light source unit 15 is still green.

  Further, at the timing t3 when the boundary BD1 passes through the central “column 2” position, the LDs belonging to “column 2” and “column 3” are turned off (turned off), and the boundary BD1 has not yet reached “column 1”. The light source light emitted as the light source unit 15 is maintained to be green by turning on (lighting) only the LDs belonging to “”.

  Thereafter, at the timing t4 when the border BD1 of the color wheel 38 passes through the "row 1" position, the LDs belonging to the "row 2" and "row 3" that have already passed through the border BD1 are turned on (lighted). On the other hand, by turning off (extinguishing) only the LDs belonging to “column 1”, the light source light emitted as the light source unit 15 is switched to become blue.

  Further, at the timing t5 when the spoke period SP is finished and the boundary BD1 of the color wheel 38 has finished passing through the “row 1” position, all LDs belonging to “row 1” to “row 3” are turned on (lighted), The light source light emitted as the light source unit 15 is blue.

  Incidentally, in the conventional light source control in which all the LDs belonging to “row 1” to “row 3” are continuously turned on, the green light from the phosphor layer 38g and the diffusing plate 38b for transmission are transmitted during the timing t2 to t4. Therefore, the light source light emitted as the light source unit 15 by the color mixture becomes cyan.

  In this way, the LDs constituting the LD array 31 are divided for each column position according to the timing at which the position of the boundary BD1 between the phosphor layer 38g and the transmission diffusion plate 38b passes the irradiation position, and light emission is different for each divided column position. By driving at the timing, as shown in FIG. 3E, light of a color accurately synchronized with the original G and B fields can be emitted.

  In the spoke period SP, each LD belonging to “column 1” to “column 3” is turned on or off. For example, in a certain period, the columns 1 and 2 are turned on and the column 3 is turned off. Alternatively, since the column 1 is turned on in a certain period and the columns 2 and 3 are turned off, the light source compared with the period in which all the light sources are turned on when viewed from the light source unit 15 as a whole. Irradiance unevenness occurs on the light irradiation surface of the unit 15, but the light irradiated from the light source unit 15 is incident on the micromirror element 14 after being converted into a luminous flux having a uniform luminance distribution through the integrator 44. There is no effect on image unevenness.

  Further, in this embodiment, a total of 24 LDs of 8 × 3 (vertical direction in the drawing) are arranged in an array, and each 8 is divided into 3 rows, and each of “row 1” to “row 3” is divided. As described above, the LD array driven to emit light is used as the light source unit.

  However, the light source unit is not limited to the “row”, and the light source unit divides a plurality of installed light emitting elements into a plurality of sections, and the arrangement direction of the sections is a boundary portion between the phosphor layer 38g of the color wheel and the diffusing plate 38b for transmission May be arranged so as to coincide with the moving direction of the condensing point position.

  Moreover, the light source part should just consist of at least 2 light emitting elements, and these light emitting elements should be the structures which can be driven mutually independently. In other words, the light source section includes a plurality of light emitting elements arranged in a state of being divided into a first section and a second section, and each of the light emitting elements in the first section and the second section has a plurality of colors. It is sufficient that the light emitting elements of the first section and the second section are driven at different light emission timings according to the timing of passing through the filter boundary position.

  As described above in detail, according to the present embodiment, it is possible to appropriately manage the period during which the color of the light source is switched, to prevent a decrease in luminance, and to improve the ability to express saturation.

  Furthermore, according to the above embodiment, the LD array 31 is connected in series in units of columns according to the condensing position, and the projection processing unit 13 is driven to emit light, so that the driving by the projection processing unit 13 can be simplified.

  In the above embodiment, one frame of a color image to be projected is composed of three fields of R, G, and B, and the phosphor layer 38g and B for exciting the green light by irradiating the blue light with the color wheel 38 in the G field. The case of having the diffusing plate 38b for transmitting blue light in the field has been described. However, the present invention is not limited to this, and a color wheel that switches between different color filters and an irradiation position on the color wheel. The present invention is applicable to any projector apparatus that uses a light emitting element that can variably control the light emission timing every time.

  In addition, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention in the implementation stage. Further, the functions executed in the above-described embodiments may be combined as appropriate as possible. The above-described embodiment includes various stages, and various inventions can be extracted by an appropriate combination of a plurality of disclosed constituent elements. For example, even if some constituent requirements are deleted from all the constituent requirements shown in the embodiment, if the effect is obtained, a configuration from which the constituent requirements are deleted can be extracted as an invention.

Hereinafter, the invention described in the scope of claims of the present application will be appended.
According to a first aspect of the present invention, a plurality of light emitting elements emitting the same color light are formed of a light emitting section arranged in a state of being divided into a first section and a second section, and a plurality of color filters, and the light emitting section A color wheel that emits light of a plurality of colors in a time-sharing manner when irradiated with light emitted from the light source, and light emitted from each of the light emitting elements of the first section and the second section is a boundary position of the plurality of color filters. And a light source driving unit that controls the light emitting unit so as to drive the light emitting elements of the first section and the second section at different light emission timings according to the timing of passing through the light source.

  According to a second aspect of the present invention, in the first aspect of the present invention, the condensing position of the first section and the condensing position of the second section of the light emitted from the light emitting unit to the color wheel are The arrangement direction and the direction in which the boundary positions of the plurality of color filters of the color wheel match the condensing position of the first section and the condensing position of the second section are the same. The light emitting portion and the color wheel are formed.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, each of the first section and the second section of the light-emitting portion includes a plurality of light-emitting elements connected in series. It is formed.

  The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein the light emitting element is a semiconductor light emitting element emitting blue laser light, and the color wheel is irradiated from the light emitting portion. It has a light diffusing plate that transmits and diffuses light, and a phosphor layer that is excited by irradiation light from the light emitting portion and emits green light.

  According to a fifth aspect of the present invention, a plurality of light emitting elements that emit light of the same color are formed of a light emitting section and a plurality of color filters arranged in a state of being divided into a first section and a second section. A color wheel that emits light of a plurality of colors in a time-division manner when irradiated with light emitted, and light emitted by each of the light emitting elements of the first section and the second section defines a boundary position of the plurality of color filters. A light source having a light source driving unit for controlling the light emitting unit to drive the light emitting elements of the first section and the second section at different light emission timings according to the passing timing, and an input means for inputting an image signal A light image forming means for forming a light image using light from the light source based on an image signal input by the input means; and a projection for projecting the light image formed by the light image forming means toward a projection target. hand Characterized by comprising and.

  According to a sixth aspect of the present invention, a plurality of light emitting elements that emit light of the same color are formed of a light emitting section arranged in a state of being divided into a first section and a second section, and a plurality of color filters, and the light emitting section A light source control method in a device including a color wheel that emits light of a plurality of colors in a time-sharing manner by being irradiated with light emitted from each of the light-emitting elements of the first section and the second section. A light source driving step of controlling the light emitting unit so as to drive the light emitting elements of the first section and the second section at different light emission timings according to the timing at which the light emitted by the light passes through the boundary positions of the plurality of color filters. It is characterized by having.

  DESCRIPTION OF SYMBOLS 1 ... LD array, 2 ... Mirror array, 3 ... Dichroic mirror, 4 ... Fluorescent wheel, 5 ... Motor (M), 6 ... Mirror, 10 ... Data projector apparatus, 11 ... Input part, 12 ... Image conversion part, 13 ... Projection processing unit, 14 ... micromirror element, 15 ... light source unit, 16 ... mirror, 17 ... projection lens unit, 18 ... CPU, 19 ... main memory, 20 ... program memory, 21 ... operation unit, 22 ... audio processing unit, 23 ... Speaker unit, 31 ... LD array, 32 ... Mirror array, 33, 34 ... Lens, 35 ... Dichroic mirror, 36, 37 ... Lens, 38 ... Color wheel, 38b ... Diffusion plate for transmission, 38g ... Phosphor layer, 39 ... Motor (M), 41 ... Lens, 42 ... Dichroic mirror, 43 ... Lens, 44 ... Integrator, 45 ... Lens, 46 ... Mirror, 4 , 48 ... lens, 50 ... lens, 51 ... mirror, 52 ... lens, 53 ... mirror, 54 ... lens, L1 to L4 ... lens, SB ... system bus, SP ... spoke period.

Claims (6)

A plurality of light emitting elements emitting the same color light arranged in a state divided into a first section and a second section;
A color wheel that is formed from a plurality of color filters and emits light of a plurality of colors in a time-division manner by being irradiated with light emitted from the light emitting unit,
The light emitting elements of the first section and the second section emit different light according to the timing at which the light emitted from the light emitting elements of the first section and the second section passes through the boundary positions of the plurality of color filters. A light source device comprising: a light source driving unit that controls the light emitting unit so as to be driven at timing.   A direction in which the condensing position of the first section and the condensing position of the second section of light radiated from the light emitting unit to the color wheel are arranged; and the plurality of color filters of the color wheel The light emitting section and the color wheel are formed so that a boundary position coincides with a direction in which the light collecting position of the first section and the light collecting position of the second section are moved. The light source device according to claim 1.   3. The light source device according to claim 1, wherein each of the first section and the second section of the light emitting section is formed by connecting a plurality of light emitting elements in series. The light-emitting element is a semiconductor light-emitting element that emits blue laser light,
The color wheel includes a light diffusing plate that transmits and diffuses irradiation light from the light emitting unit, and a phosphor layer that is excited by irradiation light from the light emitting unit and emits green light. The light source device according to claim 1. A plurality of light emitting elements that emit the same color light are formed from a light emitting unit and a plurality of color filters arranged in a state of being divided into a first section and a second section, and light emitted from the light emitting section is irradiated. The color wheel that emits light of a plurality of colors in a time-sharing manner, and the light emitted from each of the light emitting elements of the first section and the second section, according to the timing at which the light passes through the boundary positions of the plurality of color filters. A light source having a light source driving unit that controls the light emitting unit so as to drive the light emitting elements of the section and the second section at different light emission timings,
An input means for inputting an image signal;
An optical image forming unit that forms an optical image using light from the light source based on an image signal input by the input unit;
A projection apparatus comprising: projection means for projecting the optical image formed by the optical image forming means toward a projection target. A plurality of light emitting elements emitting the same color light are formed from a light emitting unit arranged in a state divided into a first section and a second section, and a plurality of color filters, and the light emitted from the light emitting section is irradiated. And a light source control method in a device having a color wheel that emits light of a plurality of colors in a time-sharing manner,
The light emitting elements of the first section and the second section emit different light according to the timing at which the light emitted from the light emitting elements of the first section and the second section passes through the boundary positions of the plurality of color filters. A light source control method comprising a light source driving step of controlling the light emitting unit so as to be driven at a timing.

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