JP2007193988A - Lamp for light source and projector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lamp for a light source capable of securing constant luminance and reducing power consumption of the lamp, and to provide a projector using the lamp for the light source. <P>SOLUTION: The lamp 1 for the light source condenses light from the light source and emits it. The light sources 3 and 6 are formed of a plurality of aligned light emitting diodes 32 and 62 and driven by controlling the pulse width modulation of light emitting diodes 32 and 62. This allows to secure constant luminance lm and reduce power consumption of the lamp comparing with the construction that the light source 3 and 6 are analogically controlled. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a light source lamp and a projector, and more particularly to a light source lamp capable of reducing power consumption of the lamp while ensuring a certain luminance and a projector using the light source lamp.

  In recent years, light source lamps using LEDs (light-emitting diodes) have been adopted as light sources for projectors and the like. For such a conventional light source lamp, a technique described in Patent Document 1 is known. A conventional light source lamp (projector light source) has a plurality of light emitting diodes arranged so as to form a surface of a light source of a predetermined size, and light emitted from each of the light emitting diodes becomes parallel light. Each of the light emitting diodes is provided with a lens provided at the tip thereof.

JP 2005-17576 A

  An object of the present invention is to provide a light source lamp capable of reducing the power consumption of the lamp while ensuring a certain luminance, and a projector using the light source lamp.

  In order to achieve the above object, a light source lamp according to the present invention is a light source lamp that collects and emits light from a light source with a lens, and includes a plurality of light emitting diodes in which the light sources are arranged. The light source is driven by pulse width modulation control of the light emitting diode.

  In this light source lamp, since the main light source is driven by pulse width modulation control, there is an advantage that the power consumption of the lamp can be reduced while ensuring a constant luminance lm, compared to a configuration in which the light source is analog controlled. . In addition, there is an advantage that heat generation of the main light source (light emitting diode) is reduced.

  In the lamp for a light source according to the present invention, the light source includes a main light source and a sub light source, the sub light source is arranged in tandem and rearward with respect to the light emission direction of the main light source, and the sub light source Light guiding means for guiding light from the light source to the front of the main light source is provided.

  In this light source lamp, the light from the main light source and the light from the sub light source guided to the front of the main light source by the light guiding means are condensed by the lens and emitted to the outside. Thereby, there is an advantage that the luminous intensity of the lamp is increased as compared with the configuration in which the light source of the lamp is composed only of the main light source. Further, as described above, the configuration in which the main light source and the sub light source are subjected to pulse width modulation control has an advantage that optimization for reducing the power consumption of the lamp can be achieved while ensuring a constant luminance lm. In particular, in the main light source and the sub light source, a large number of light emitting diodes are used, which is advantageous in that the power consumption can be efficiently reduced.

  In the light source lamp according to the present invention, the light source includes a main light source and a sub light source, the sub light source is arranged in tandem and rearward with respect to the light emission direction of the main light source, and the main light source Cooling means for cooling the light source and the sub-light source is provided.

  Since the main light source and the sub light source are cooled by the cooling means, this light source lamp has an advantage of reducing adverse effects caused by heat generated when the lamp is turned on.

  A projector according to the present invention includes the light source lamp as a light source.

  In the projector using the above light source lamp, the light source of the light source lamp 1 is driven by PWM control as described above. Therefore, the power consumption and heat generation of the lamp are compared with the configuration in which the light source is driven by analog control. Is reduced. Thereby, there is an advantage that the low power property and the low heat generation property of the applied product are improved.

  In the light source lamp according to the present invention, since the main light source is driven by pulse width modulation control, the power consumption of the lamp can be reduced while ensuring a constant luminance lm, as compared with a configuration in which the light source is analog controlled. There are advantages. In addition, there is an advantage that heat generation of the main light source (light emitting diode) is reduced.

  Hereinafter, the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments. The constituent elements of this embodiment include those that can be easily replaced by those skilled in the art or those that are substantially the same. In addition, a plurality of modifications described in this embodiment can be arbitrarily combined within a range obvious to those skilled in the art.

  1 to 3 are a sectional view (FIGS. 1 and 2) and a block diagram (FIG. 3) showing a lamp for a light source according to an embodiment of the present invention. 4-6 is explanatory drawing which shows the effect | action of the lamp | ramp for light sources described in FIG. 7 and 8 are a plan view (FIG. 7) and a cross-sectional view (FIG. 8) showing the light guide means of the light source lamp shown in FIG. 9 and 10 are explanatory views showing the operation of the light source lamp shown in FIG. 11 and 12 are explanatory views showing a modification of the light source lamp shown in FIG. FIG. 13 is an explanatory view showing the operation of the cooling means of the light source lamp shown in FIG. 14-18 is explanatory drawing which shows the modification of the cooling means of the lamp for light sources described in FIG. 19 and 20 are explanatory diagrams showing application examples of the light source lamp shown in FIG.

[Light source lamp]
The light source lamp 1 includes a lamp housing 2, a main light source 3, a lens 4, and a control unit 5 (see FIGS. 1 to 3). The lamp housing 2 is formed of a cylindrical member, and houses the main light source 3, the lens 4, and the control unit 5 therein. The main light source 3 includes a plurality of light emitting diodes 32 and a circuit board 31 of these light emitting diodes 32, and each light emitting diode 32 is arranged on the circuit board 31 in a grid pattern. The main light source 3 is fixedly installed in the lamp housing 2 with the arrangement surface of the light emitting diodes 32 facing the axial direction of the lamp housing 2. The main light source 3 employs a circuit board 31 made of aluminum or magnesium in order to improve heat dissipation. The lens 4 is disposed in front of the main light source 3 (the arrangement surface of the light emitting diodes 32) and has a function of condensing light from the main light source 3. The control unit 5 has a function of controlling the driving of the main light source 3 and is connected to an external power source (not shown). The power source of the light source lamp 1 is constituted by, for example, a household power source or a vehicle battery. In the light source lamp 1, the main light source 3 is driven and turned on during operation, and the light is condensed via the lens 4 and emitted forward.

  In this light source lamp 1, since the main light source 3 is composed of a light emitting diode 32, (1) the advantage that the lamp life, luminous efficiency and startability are improved as compared with a configuration in which the light source is composed of a xenon lamp or an ultrahigh pressure mercury lamp. (See FIG. 6). Note that the lamp life and luminous efficiency shown in the chart of FIG. 6 are measured values during 500 [W] operation. Also, (2) since the amount of heat generated by the main light source 3 is small, there is an advantage that the lamp cooling system can be simplified. For example, a xenon lamp has a lamp temperature of about 500 [° C.] during operation. In the light source lamp 1, the lamp temperature is reduced to about 100 [° C.] under equivalent output conditions. (3) Since the power consumption of the main light source 3 is small, there is an advantage that the power consumption of the lamp can be reduced, and there is an advantage that the safety of the lamp and the driving circuit are simplified. For example, a xenon lamp is driven by a DC power source of about 200 [V], but the light source lamp 1 can be driven under a similar output condition by a DC voltage of about 10 [V].

[PWM control]
Here, in the light source lamp 1, the main light source 3 is driven by pulse width modulation control (PWM control). Specifically, the control unit 5 generates a pulse signal, whereby a pulse voltage is applied to the main light source 3 and the main light source 3 is turned on (see FIG. 4). Further, the dimming control of the lamp is performed by adjusting the duty value T / N of the pulse signal. Further, the frequency f of the pulse signal is selected based on the saturation value of the luminance lm of the main light source 3, and the driving frequency of the lamp is optimized (see FIG. 5).

  In such a configuration, since the main light source 3 is driven by pulse width modulation control, there is an advantage that the power consumption of the lamp can be reduced while ensuring a constant luminance lm, compared to a configuration in which the light source is analog controlled. In addition, there is an advantage that heat generation of the main light source 3 (light emitting diode 32) is reduced.

[Light guiding means]
In general, a light source composed of a light emitting diode has a light intensity smaller than that of a xenon lamp or the like. For this reason, in a conventional light source lamp that employs a light source composed of light emitting diodes (see Patent Document 1), it is necessary to arrange a large number of light emitting diodes on a plane in order to ensure sufficient luminous intensity. For this reason, since a lamp enlarges in the width direction, there is a problem that it cannot be applied to an existing projector or a vehicle headlamp.

  In view of the above points, the light source lamp 1 employs the following configuration (see FIG. 1). First, in addition to the main light source 3, a sub light source 6 is arranged. Similar to the main light source 3, the sub light source 6 includes a plurality of light emitting diodes 62 arranged in a grid on a circuit board 61 made of aluminum or magnesium. The sub light source 6 is arranged in a column and rearward with respect to the light emitting direction of the main light source 3. Further, the sub light source 6 is arranged so that the arrangement surface of the light emitting diodes 62 and the arrangement surface of the light emitting diodes 32 of the main light source 3 are substantially parallel. The sub light source 6 is driven by the control unit 5 under pulse width modulation control.

  In addition, light guide means 7 is disposed in the lamp housing 2 (see FIGS. 1, 7 and 8). The light guiding means 7 has a function of guiding light from the sub light source 6 to the front of the main light source 3. The light guide means 7 is configured by combining a plurality of light guide parts (first light guide part 71 and second light guide part 72) made of, for example, acrylic resin. Further, the light guide means 7 is disposed so as to be sandwiched between the main light source 3 and the sub light source 6. Further, the light guide means 7 has a plane of the first light guide portion 71 positioned in front of the sub light source 6 (on the arrangement surface side of the light emitting diode 62), and the second light guide portion 72 of the first light guide portion 71. It is arranged to face the front from the surroundings. The light guide means 7 is subjected to embossing and deposition of a reflective film to reduce light leakage and diffusely reflect light inside.

  In such a configuration, the light of the main light source 3 and the light of the sub light source 6 guided to the front of the main light source 3 by the light guide means 7 are collected by the lens 4 and emitted to the outside (see FIG. 9). ). Specifically, the light from the sub-light source 6 enters the light guide means 7 from the bottom surface of the first light guide 71 and is diffused and diffused radially in the first light guide 71 to the surrounding second light guide. 72, and is emitted from the end portion to the front of the main light source 3 through the second light guide portion 72. Thereby, there is an advantage that the luminous intensity of the lamp is increased as compared with the configuration in which the light source of the lamp is composed only of the main light source 3. Further, in such a configuration, the main light source 3 and the sub light source 6 are arranged in tandem (see FIGS. 1 and 7), and therefore, a configuration comprising a large number of light emitting diodes in which the light source of the lamp is arranged on a single plane. As compared with the above, there is an advantage that the lamp is miniaturized in the width direction.

  Further, as described above, the configuration in which the main light source 3 and the sub light source 6 are subjected to pulse width modulation control has an advantage that optimization for reducing the power consumption of the lamp can be achieved while ensuring a constant luminance lm. . In particular, the main light source 3 and the sub light source 6 use a large number of light emitting diodes 32 and 62, which is advantageous in that power consumption can be efficiently reduced.

[Modification 1 of the light guiding means]
The light source lamp 1 preferably has a configuration in which the light guide means 7 guides the light from the sub light source 6 from the periphery of the main light source 3 to the front of the main light source 3 (see FIG. 9). Usually, the light emitted from the lamp is collected by the lens 4 at the center of the lamp. For this reason, the light emitted from the lamp has a higher luminance lm toward the center and lowers toward the end (see FIG. 10). In this regard, in the above configuration, since the light from the sub light source 6 is emitted forward from the periphery of the main light source 3, the luminance lm of the lamp is made uniform at the center and the end (high parallelism). There is an advantage of obtaining irradiation light). In addition, such a configuration is particularly advantageous in that, for example, when the light source lamp 1 is used in a projector, the brightness of the entire projected image (the central portion and the end portion) is uniformed so that the image is easy to see.

  Further, in this configuration, the light guide means 7 has a first light guide portion 71 that becomes an incident surface of light from the sub light source 6 and a substantially annular structure surrounding the outer periphery of the main light source 3 and the first light guide portion 71. It is preferable to have the 2nd light guide part 72 which guides the light guide | induced by the front of the main light source 3 (refer FIGS. 7-9). In such a configuration, since the light guide means 7 has a substantially annular structure (second light guide portion 72), the light from the sub light source 6 is emitted from the periphery of the main light source 3 in an annular shape. Thereby, there exists an advantage by which a brightness | luminance of a lamp | ramp is equalize | homogenized by the center part and an edge part by simple structure (refer FIG. 10).

  Moreover, in said structure, it is preferable that the 2nd light guide part 72 of the light guide means 7 consists of several light guide plates combined substantially cyclically | annularly (refer FIG. 7 and FIG. 8). For example, the light guide means 7 includes a first light guide portion 71 having a regular octagonal flat plate shape and eight light guide plates having a trapezoidal cross section. And the 2nd light guide part 72 is cyclically combined and arrange | positioned so that the outer periphery of the 1st light guide part 71 may be enclosed. In such a configuration, there is an advantage that the light guide means 7 is easily processed as compared with a configuration in which the light guide means 7 is formed of a single member.

  However, the present invention is not limited to this, and it is preferable that the second light guide portion 72 of the light guide means 7 is composed of a single light guide member having a substantially annular shape (not shown). In such a configuration, the main light source 3 is disposed inside the annular shape of the second light guide portion 72, and the light of the sub light source 6 is emitted from the periphery of the main light source 3 (annular second light guide portion 72). The Then, due to the annular shape of the second light guide portion 72, the light emitted from the entire lamp becomes circular. Thereby, there is an advantage that the play of the light distribution pattern of the lamp is reduced.

  Moreover, the light guide means 7 is not limited to a light guide plate. For example, the light guide means 7 may be constituted by an optical fiber (see FIG. 11). For example, the light guide means 7 is composed of a plurality of optical fibers 73 bundled in an annular shape, and one end of each optical fiber 73 is disposed in front of the sub-light source 6 and the other end is the main light source 3. It is arranged to face the front from the side. In such a configuration, the light from the sub light source 6 is guided to the front of the main light source 3 through each optical fiber 73. This configuration also has the advantage that the light from the main light source 3 and the light from the sub light source 6 are emitted in the same direction, and the luminous intensity of the lamp is sufficiently ensured. Further, since the optical fiber 73 has flexibility, it is easy to form a light guide path from the sub light source 6 to the front of the main light source 3 (the structure of the light guide means 7 is simplified).

[Modification 2 of the light guiding means]
In the light source lamp 1, the main light source 3 and the sub light source 6 are arranged so that the light emission direction of the main light source 3 and the light emission direction of the sub light source 6 are substantially coaxial and in the same direction. It is preferable (see FIG. 1 and FIG. 9). In such a configuration, since the main light source 3 and the sub light source 6 are directed in the same direction, the loss of light when the light from the sub light source 6 is guided to the front of the main light source 3 is small. Thereby, for example, compared to a configuration in which the main light source 3 and the sub light source 6 are directed in opposite directions, there is an advantage that the luminous efficiency of the lamp is improved, and an advantage that the configuration of the light guide means 7 is simplified. There is.

  However, the present invention is not limited to this, and the main light source 3 and the sub light source 6 may be arranged so that the light emission direction of the main light source 3 and the light emission direction of the sub light source 6 are substantially coaxial and opposite to each other ( (See FIG. 12). In such a configuration, the first light guide portion 71 of the light guide means 7 is disposed at the subsequent stage of the main light source 3 and the sub light source 6. Then, the light from the sub light source 6 enters the light guide means 7 from the first light guide portion 71, is diffused and diffused radially in the first light guide portion 71, and is guided to the surrounding second light guide portion 72, The light passes through the second light guide 72 and is emitted from the end to the front of the main light source 3 (see FIG. 9). Therefore, the light from the sub light source 6 is guided by the light guide means 7 so as to make a U-turn and reaches the front of the main light source 3. This configuration also has the advantage that the light from the main light source 3 and the light from the sub light source 6 are emitted in the same direction, and the luminous intensity of the lamp is sufficiently ensured.

[Modification 3 of the light guiding means]
In addition, the light source lamp 1 has a two-stage structure in which the light source includes a main light source 3 and a sub light source 6 (see FIG. 1). However, the present invention is not limited to this, and the light source may have a three-stage structure including the main light source 3 and the plurality of sub-light sources 6 (not shown). Thereby, there exists an advantage by which the luminous intensity of a lamp | ramp is ensured more suitably. Such a configuration can be appropriately designed within the range obvious to those skilled in the art according to the configuration shown in FIG.

[Cooling means]
In general, a high-intensity light-emitting diode has a property of generating high heat during light emission. In addition, when lamps using light emitting diodes as light sources are applied to projectors and vehicle headlamps, a large number of light emitting diodes are arranged on the substrate so as to be densely arranged in an array to ensure sufficient lamp brightness. Thus, a light source is configured. For this reason, when the lamp is lit, the light source becomes hot due to heat generated by the light emitting diode. As a result, the light emitting diode does not function in the rated state, and the light source may ignite.

  In view of the above points, the light source lamp 1 is provided with cooling means 8 for cooling the main light source 3 and the sub light source 6 (see FIGS. 1, 2 and 13). The cooling unit 8 includes, for example, a blower fan 81 and a plurality of vent holes 82 formed in the lamp housing 2. An air passage is formed in the lamp housing 2 so that air from the blower fan 81 is supplied to the main light source 3 and the sub light source 6 through the vent hole 82.

  In such a configuration, since the main light source 3 and the sub light source 6 are cooled by the cooling means 8, there is an advantage that the adverse effect due to heat generated when the lamp is lit is reduced. In addition, a configuration (air cooling structure) in which the cooling means 8 includes the blower fan 81 and a plurality of vent holes 82 is preferable in that the main light source 3 and the sub light source 6 are cooled simply and effectively.

[Modification 1 of Cooling Means]
In the light source lamp 1, it is preferable that the outlet of the vent hole 82 is disposed at a position substantially opposite to the arrangement surface of the light emitting diodes 32 of the main light source 3 or the arrangement surface of the light emitting diodes 62 of the sub light source 6 (FIG. 1 and FIG. 13). For example, the vent hole 82 is formed on the side of the lens 4 or on the side of the light guide means 7, and the outlet of the vent hole 82 is configured to face the arrangement surface side of the main light source 3 or the sub light source 6. In such a configuration, the air that has passed through the vent hole 82 is blown substantially perpendicularly to the front surface of the main light source 3 or the sub light source 6 (the arrangement surface of the light emitting diodes 32 and 62). Thereby, there exists an advantage by which the main light source 3 and the sub light source 6 are cooled effectively.

  However, the present invention is not limited to this, and the outlet of the vent hole 82 may be formed substantially on the side of the array surface of the light emitting diodes 32 of the main light source 3 or the array surface of the light emitting diodes 62 of the sub light source 6 (see FIG. 14). For example, the vent hole 82 is formed on the side surface (cylindrical peripheral surface) of the lamp housing 2. In such a configuration, the air that has passed through the vent hole 82 is blown from the side to the main light source 3 or the sub light source 6. Then, air passes through the front surface of the arrangement surface of the light emitting diodes 32 and 62 so as to be boiled from the side, and the main light source 3 and the sub light source 6 are cooled. With this configuration, the outer diameter of the lamp housing 2 can be reduced by an amount corresponding to the space for forming the vent hole 82 as compared with a configuration in which the vent hole 82 is formed at a position facing the main light source 3 or the sub light source 6. There are advantages (see FIG. 13 and FIG. 14).

  In the light source lamp 1, in the configuration in which the main light source 3 and the sub light source 6 are arranged adjacent to each other with a gap, an air passage from the blower fan 81 is provided in the gap between the main light source 3 and the sub light source 6. Preferably, it is formed (see FIG. 15). For example, the main light source 3 and the sub light source 6 are arranged facing each other or back to back, and an air passage is formed so that cooling air passes between the main light source 3 and the sub light source 6. In such a configuration, both the main light source 3 and the sub light source 6 are simultaneously cooled by the air passing through the gap between the main light source 3 and the sub light source 6. Thereby, since the main light source 3 and the sub light source 6 are cooled by the single air passage, there exists an advantage by which the structure of the air passage in the lamp housing 2 is simplified.

  Further, in the light source lamp 1, it is preferable that a plurality of vent holes 82 be arranged so that the air passage from the blower fan 81 crosses the surface of the main light source 3 or the sub light source 6 (FIGS. 14 to FIG. 14). 18). For example, the outlet of the vent 82 on the upstream side (the side that supplies air to the main light source 3 or the sub light source 6) and the vent hole on the downstream side (the side that discharges air after cooling the main light source 3 or the sub light source 6). A plurality of vent holes 82 are arranged so that a straight line connecting the entrance of 82 crosses the main light source 3 or the sub light source 6. Such a configuration has an advantage that the main light source 3 and the sub light source 6 are effectively cooled because the cooling air crosses the surface of the main light source 3 or the sub light source 6.

  In addition, not only said air cooling structure but a water cooling structure may be employ | adopted as the cooling means 8 (illustration omitted).

[Modification 2 of Cooling Means]
In addition, it is preferable that the light source lamp 1 is provided with a blower guide 83 that guides air from the vent 82 to the surface of the main light source 3 or the sub light source 6 (see FIGS. 1 and 13). The air blowing guide 83 is made of, for example, a fin-like member, and is disposed on the downstream side of the air hole 82 to guide the air that has passed through the air hole 82 to the main light source 3 or the sub light source 6. In such a configuration, since the air guided by the air blowing guide 83 is efficiently blown to the main light source 3 or the sub light source 6, there is an advantage that the main light source 3 and the sub light source 6 are effectively cooled.

[Modification 3 of Cooling Means]
In the light source lamp 1, the light emitting diodes 32 and 62 of the main light source 3 and the sub light source 6 are preferably arranged on the circuit boards 31 and 61 made of aluminum or magnesium (see FIG. 1). In such a configuration, cooling of the light emitting diodes 32 and 62 is promoted by the heat dissipation of the circuit boards 31 and 61. Thereby, there exists an advantage by which the main light source 3 and the sub light source 6 are cooled more effectively.

[Applicable object 1]
The light source lamp 1 is preferably applied to, for example, a projector light source. In such a projector, since the light sources 3 and 6 of the light source lamp 1 are driven by PWM control as described above (see FIGS. 1 to 5), compared with a configuration in which the light source is driven by analog control, Power consumption and heat generation are reduced. Thereby, there is an advantage that the low power property and the low heat generation property of the applied product are improved. Further, in the light source lamp 1, since the light source is composed of the main light source 3 and the sub light source 6 arranged in tandem (see FIGS. 1 and 9), a large number of light emitting diodes in which the light source is arranged on a single plane. Compared with the structure which consists of this, a lamp | ramp can be reduced in the width direction, ensuring the luminous intensity of a lamp | ramp more than fixed. Thereby, there is an advantage that the applied product can be downsized and the design can be improved. Moreover, in this light source lamp 1, since the light sources 3 and 6 are cooled by the cooling means 8 (see FIG. 13), there is an advantage that heat generation of the applied product during operation is reduced.

  Hereinafter, examples in which the light source lamp 1 is applied to the liquid crystal projector 100 and the DLP (registered trademark) projector 110 will be described respectively (see FIGS. 19 and 20).

  In the liquid crystal projector 100 shown in FIG. 19, first, white light is emitted from the light source lamp 1. The white light is separated into red light (transmitted light), green light, and blue light (reflected light) by the first dichroic mirror 101, and further green light (transmitted) by the second dichroic mirror 102. Light) and blue light (reflected light). Next, the red light, the green light, and the blue light are projected as images of respective colors (red, green, and blue) through the liquid crystal panels 103 to 105. Then, the images of the respective colors are synthesized by the prism 106, and this synthesized light is projected onto the screen 108 via the projection lens 107. As a result, an image is displayed on the screen 108.

  In the DLP projector 110 shown in FIG. 20, first, white light is emitted from the light source lamp 1. Then, the white light is separated into red light, green light and blue light by the color wheel 111. Specifically, the color wheel 111 has red, green, and blue, and is rotated at a high speed so that white light is transmitted and separated by the filters of the respective colors. Then, red light, green light and blue light transmitted through the color wheel 111 are sequentially reflected by a DMD (Digital Micromirror Device) 112 and projected onto a screen 114 via a projection lens 113. As a result, an image is displayed on the screen 114.

[Applicable object 2]
The light source lamp 1 is preferably used as an illumination lamp installed in a power plant or the like. For example, in a power plant, monitoring lamps are continuously operated for a long time because of the necessity of monitoring the premises. In this respect, the light source lamp 1 is preferable in terms of excellent lamp life and luminous efficiency (see FIG. 6). In addition, since the light source lamp 1 realizes a large amount of light and space saving by a plurality of light sources 3 and 6 arranged in a column, it can output a sufficient amount of light necessary for monitoring and can be installed in a narrow space. (Refer to FIG. 7). In addition, the light source lamp 1 is preferable in that it can cool the light sources 3 and 6 by the cooling means 8, which prevents overheating of the lamp during long and continuous operation (see FIG. 13).

[Applicable object 3]
The light source lamp 1 can be applied to, for example, a vehicle headlamp (not shown).

  As described above, the light source lamp according to the present invention is useful in that the power consumption of the lamp can be reduced while ensuring a certain luminance.

It is sectional drawing which shows the lamp | ramp for light sources concerning the Example of this invention. It is sectional drawing which shows the lamp | ramp for light sources concerning the Example of this invention. It is a block diagram which shows the lamp | ramp for light sources concerning the Example of this invention. It is explanatory drawing which shows the effect | action of the lamp for light sources described in FIG. It is explanatory drawing which shows the effect | action of the lamp for light sources described in FIG. It is explanatory drawing which shows the effect | action of the lamp for light sources described in FIG. It is a top view which shows the light guide means of the lamp | ramp for light sources described in FIG. It is sectional drawing which shows the light guide means of the lamp | ramp for light sources described in FIG. It is explanatory drawing which shows the effect | action of the lamp for light sources described in FIG. It is explanatory drawing which shows the effect | action of the lamp for light sources described in FIG. It is explanatory drawing which shows the modification of the lamp for light sources described in FIG. It is explanatory drawing which shows the modification of the lamp for light sources described in FIG. It is explanatory drawing which shows the effect | action of the cooling means of the lamp for light sources described in FIG. It is explanatory drawing which shows the modification of the cooling means of the lamp for light sources described in FIG. It is explanatory drawing which shows the modification of the cooling means of the lamp for light sources described in FIG. It is explanatory drawing which shows the modification of the cooling means of the lamp for light sources described in FIG. It is explanatory drawing which shows the modification of the cooling means of the lamp for light sources described in FIG. It is explanatory drawing which shows the modification of the cooling means of the lamp for light sources described in FIG. It is explanatory drawing which shows the example of application of the lamp | ramp for light sources described in FIG. It is explanatory drawing which shows the example of application of the lamp | ramp for light sources described in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Light source lamp 2 Lamp housing 3 Main light source 31 Circuit board 32 Light emitting diode 4 Lens 5 Control part 6 Sub light source 61 Circuit board 62 Light emitting diode 7 Light guide means 71 First light guide part 72 Second light guide part 73 Optical fiber 8 Cooling Means 81 Blower fan 82 Ventilation hole 83 Blower guide

Claims (4)

A light source lamp that collects and emits light from a light source by a lens;
A light source lamp comprising a plurality of light emitting diodes in which the light sources are arranged, wherein the light sources are driven by pulse width modulation control of the light emitting diodes.   The light source has a main light source and a sub light source, the sub light source is arranged in tandem and rearward with respect to the light emitting direction of the main light source, and the light from the sub light source is placed in front of the main light source. The light source lamp according to claim 1, wherein a light guide means for guiding is provided.   The light source includes a main light source and a sub light source, the sub light source is arranged in tandem and rearward with respect to the light emission direction of the main light source, and cooling means for cooling the main light source and the sub light source The light source lamp according to claim 1, wherein the light source lamp is provided.   A projector comprising the light source lamp according to claim 1 as a light source.

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