CN1920639A - Light source system and light source module - Google Patents
Light source system and light source module Download PDFInfo
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- CN1920639A CN1920639A CN 200510090933 CN200510090933A CN1920639A CN 1920639 A CN1920639 A CN 1920639A CN 200510090933 CN200510090933 CN 200510090933 CN 200510090933 A CN200510090933 A CN 200510090933A CN 1920639 A CN1920639 A CN 1920639A
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Abstract
The invention relates to a light source module which comprises several light-emitting diodes and one control circuit, wherein each light-emitting diode can generate different colors; the control circuit is connected to the light-emitting diodes, via one switching speed and one switching sequence, to periodically switch light-emitting diodes to light, to form special mixed light. One light source system comprises several said light source modules and one control circuit, while the control circuit is connected to each light source module, to switch the light source module periodically to light at one switching speed and one switching sequence.
Description
Technical field
The present invention relates to a kind of light-source system and light source module thereof, particularly a kind of light-source system and light source module thereof that utilizes light emitting diode.
Background technology
Known LCD is to utilize a large amount of luminous points that luminescence unit produced, and constitutes one and desires picture displayed.Each luminescence unit comprises a light emitting diode, is used for sending specific coloured light.
United States Patent (USP) the 6th, disclosing a kind of illuminator 536, No. 914, is to be used for LCD, it comprises a light emitting surface plate, and this panel has a light emission windows and at least one is in order to the edge surface (edge surface) of coupling light to the light emitting surface plate.This illuminator also comprises a light mixing chamber, and the adjacent edge surface is in order to provide light source.This light source comprises the light emitting diodes that many groups have the emission wavelength of not sharing the same light, for example comprise blueness, green, redness or even amber light emitting diode, so that even light distribution to be provided.
Though this kind illuminator is than the power saving of conventional cathode ray tube formula display, but when every group of light emitting diode is applied to medium-and-large-sized display, luminous because of continuing between the operating period, its power consumption is still surprising, and every group of lasting luminous display that also can cause of light emitting diode is overheated, influence its life-span, therefore the light source module of a low power consumption is still the industry problem demanding prompt solution.
Summary of the invention
One object of the present invention is to provide a kind of light source module, comprise first light emitting diode, second light emitting diode, the 3rd light emitting diode and control circuit, wherein first light emitting diode is in order to produce first coloured light, second light emitting diode is in order to produce second coloured light, and the 3rd light emitting diode is in order to produce the 3rd coloured light.Control circuit is electrically connected to first, second and third light emitting diode, and with all throw-over rates and a switching sequence period switching first, second and third lumination of light emitting diode, be mixed into particular light ray by first, second and third coloured light, and reach the purpose of power saving, low heating and high light transmittance efficiency.
Its transfer sequence can be (1) first lumination of light emitting diode; (2) second lumination of light emitting diode; (3) the 3rd lumination of light emitting diode; And (4) first, second and third light emitting diode simultaneously luminous.
This light source module also can comprise the 4th light emitting diode, and in order to produce the 4th coloured light, the first, second, third and the 4th coloured light is mixed into this particular light ray.Its transfer sequence can be (1) first lumination of light emitting diode; (2) second lumination of light emitting diode; (3) the 3rd lumination of light emitting diode; (4) the 4th lumination of light emitting diode; And the (5) first, second, third and the 4th light emitting diode simultaneously luminous.
Another object of the present invention is to provide a kind of light-source system, comprise a plurality of light source modules and a control circuit.Each light source module comprises first light emitting diode, second light emitting diode and the 3rd light emitting diode.First light emitting diode is in order to produce first coloured light, and second light emitting diode is in order to produce second coloured light, and the 3rd light emitting diode is in order to produce the 3rd coloured light, and wherein first, second and third coloured light is mixed into particular light ray.Control circuit is electrically connected to above-mentioned a plurality of light source module, and it is luminous to switch sequence period toggle lights module with all throw-over rates and, and then cause and visually feel just like a whole large-scale light source luminescent, to reach power saving, low heating and the purpose of large tracts of land evenly luminous effect visually.
Behind the embodiment of consulting accompanying drawing and describing subsequently, this technical field has knows that usually the knowledgeable just can understand other purpose of the present invention, and technological means of the present invention and embodiment.
Description of drawings
Fig. 1 is for showing the synoptic diagram of the first light source module embodiment;
Fig. 2 is for showing the synoptic diagram of secondary light source module embodiment;
Fig. 3 is for showing the synoptic diagram of the 3rd light source module embodiment;
Fig. 4 is the synoptic diagram of another embodiment of demonstration the 3rd light source module embodiment;
Fig. 5 is the synoptic diagram of another embodiment of demonstration the 3rd light source module embodiment; And
Fig. 6 is for showing the synoptic diagram of a light-source system embodiment.
The main element description of symbols
1: 100: the first coloured light of light source module
102: the second coloured light of 101: the first light emitting diodes
104: the three coloured light of 103: the second light emitting diodes
107: control circuit 109: light-guide device
113: the second sides of 111: the first sides
117: the four sides of 115: the three sides
2: 200: the four coloured light of light source module
Light emitting diode 202 in 201: the four: particular light ray
3: light source module 300: particular light ray
301: 303: the first sides of light-guide device
307: the three sides of 305: the second sides
403: reflecting element 501: prism array
Coloured light 601 in 600: the first: light source module
Coloured light 603 in 602: the second: light source module
605: the first light emitting diodes of 604: the three coloured light
606: 607: the second light emitting diodes of particular light ray
Light emitting diode 611 in 609: the three: control circuit
Embodiment
One embodiment of the invention for a kind of light source module 1, are used for the backlight liquid crystal display module as shown in Figure 1.In more detail, backlight module comprises the array that a plurality of light source modules 1 are formed, and each light source module 1 can produce a luminous point, i.e. illumination pixel (lighting pixel), and these pel arrays just can form picture.
Light source module 1 comprises first light emitting diode 101 in order to produce first coloured light 100, second light emitting diode 103 in order to produce second coloured light 102, the 3rd light emitting diode 105 in order to produce the 3rd coloured light 104 and control circuit 107.Control circuit 107 is electrically connected to first light emitting diode 101, second light emitting diode 103 and the 3rd light emitting diode 105, and it is luminous to switch sequence period switching first, second and third light emitting diode 101,103 and 105 with all throw-over rates and.
Light source module 1 also comprises light-guide device 109, the first coloured light 100, second coloured light 102 and the 3rd coloured light 104 and be mixed into particular light ray 106 in light-guide device 109.Light-guide device 109 comprises first side 111, second side 113, the 3rd side 115 and the 4th side 117.First, second and third light emitting diode 101,103 and 105 is to be positioned at first side 111.Second side 113 and the 3rd side 115 are a minute surface, in order to reflect first coloured light 100, second coloured light 102 and the 3rd coloured light 104, promptly reflect particular light ray 106.The 4th side 117 is the light-emitting window of light source module 1 for this reason.Particular light ray 106 can be launched by the 4th side 117, to form above-mentioned luminous point after second side 113 and 115 reflections of the 3rd side.
In this embodiment, first coloured light 100 is red, and second coloured light 102 is green, and the 3rd coloured light 104 is blue.The transfer sequence that control circuit 107 is controlled is: (1) first light emitting diode is 101 luminous, (2) second light emitting diodes are 103 luminous, (3) the 3rd light emitting diodes are 105 luminous, (4) first light emitting diodes 101, second light emitting diode 103 and the 3rd light emitting diode 105 are simultaneously luminous.So each light emitting diode is not all to be in luminance at any time, therefore can reach purpose of power saving.The switching fluorescent lifetime of supposing each light emitting diode is all identical, then in same period, and the backlight module power saving about 50% that this embodiment is more luminous than not switching.Because light source module 1 is to be made by semiconductor material, too high temperature can influence the work efficiency of semiconductor material, therefore each light emitting diode switches that luminous that its semiconductor material is kept is high-effect, and therefore except power saving, this embodiment also has the advantage of low heating and high light transmittance efficiency.
If this light source module 1 desire produces the particular light ray 106 of white light, then first light emitting diode 101, second light emitting diode 103 and the 3rd light emitting diode 105 produce first coloured light 100, second coloured light 102 and the 3rd coloured light 104 of suitable saturation degree respectively, to be mixed into white light.But if switching rate is too slow, promptly do not exceed the rapid rate that naked eyes can be differentiated, when then switching with above-mentioned transfer sequence, the coloured light that naked eyes are seen in a switching cycle is (1) ruddiness, (2) green glow, (3) blue light, (4) white light, can't reach the purpose that is mixed into white light.Therefore, the speed that the switching rate need can be differentiated faster than naked eyes is preferably and is not slower than 1/120 second, and just switching rate is 1/120 second the most slowly, and the coloured light that makes naked eyes be seen in a switching cycle is permanent to be white light.
In general, red, green, blue three coloured light can be mixed into the light of any color, but with present technology, the brightness meeting that green glow and blue light-emitting diode produced is greater than red light-emitting diode, and so difference can cause the light generation deviation of the particular color of desire generation.In order to remedy the deficiency of red light emitting diodes brightness, another embodiment of the present invention as shown in Figure 2, also comprise the 4th light emitting diode 201 with light source module 1 different being in light source module 2 (control circuit 107 is not represented), in order to producing the 4th coloured light 200, thereby first coloured light 100, second coloured light 102, the 3rd coloured light 104 and the 4th coloured light 200 can be mixed into particular light ray 202.The 4th coloured light 200 is yellow, can remedy the deficiency of first light emitting diode, 101 brightness.
In this embodiment, the transfer sequence of its light emitting diode is that (1) first light emitting diode is 101 luminous, (2) second light emitting diodes are 103 luminous, (3) the 3rd light emitting diodes are 105 luminous, (4) the 4th light emitting diodes 201 are luminous and (5) first light emitting diodes 101, second light emitting diode 103, the 3rd light emitting diode 105 and the 4th light emitting diode 201 are simultaneously luminous.Each light emitting diode is not all to be in luminance at any time like this, therefore can reach purpose of power saving.The switching fluorescent lifetime of supposing each light emitting diode is all identical, then in same period, and the backlight module power saving about 60% that this embodiment is more luminous than not switching.Same, this embodiment also has the advantage of low heating.
The light-emitting window of the foregoing description all is positioned at the 4th side 117 of light-guide device 109, but light source module of the present invention can change light direction according to actual needs.As shown in Figure 3, another embodiment of the present invention also is a light source module, light source module 3 comprises first light emitting diode 101, second light emitting diode 103, the 3rd light emitting diode 105, the 4th light emitting diode 201 and control circuit (not shown), as mentioned above, light emitting diode 101,103,105,201 is respectively in order to produce first coloured light 100, second coloured light 102, the 3rd coloured light 104 and the 4th coloured light 200, to be mixed into particular light ray 300.
For particular light ray 300 is launched by the 3rd side 307, second side 305 of light-guide device 301 has the convex-concave surface (not shown), and its convex-concave surface can utilize etching (etch), line (scribe) or sandblast modes such as (sandblast) to form.This convex-concave surface can reflex to the coloured light 100,102,104 and 200 of directive second side 305 the 3rd side 307 of light-guide device 301.
Except utilizing the mode of convex-concave surface, light source module 3 can comprise diffraction element 401 as shown in Figure 4, is second side 305 that is positioned at light-guide device 301.Diffraction element 401 can reflex to the 3rd side 307 with first coloured light 100, second coloured light 102, the 3rd coloured light 104 and the 4th coloured light 200.
Because the material of diffraction element 401 possibly can't reflex to the 3rd side 307 fully with coloured light 100,102,104 and 200, therefore there is part coloured light to reflect and passes diffraction element 401.For increasing reflection efficiency, light source module 3 can comprise reflecting element 403, is to be positioned at the opposite side of diffraction element 401 with respect to light-guide device 301, the i.e. below of diffraction element 401.The coloured light 100,102,104 and 200 that reflecting element 403 can will penetrate diffraction element 401 is the 3rd side 307 of reflected back light-guide device 301 again.Diffraction element 401 and reflecting element 403 can be gratings or other has the element of diffraction function.
Though the light-emitting window of the foregoing description only is positioned at a side (the 3rd side or the 4th side), but the present invention does not limit the direction of light-emitting window, for example light-emitting window can be the 3rd side and the 4th side simultaneously, light source module just has 2 light-emitting windows like this, so the present invention also has the advantage of multiaspect bright dipping, to cooperate the needs of practice.
The present invention also provides a kind of light-source system, is LCD, and this LCD has backlight module, comprises the array that a plurality of light source module is formed, and each light source module can produce an illumination pixel, and these pel arrays just can form picture.One embodiment of the invention for convenience of explanation, are only represented 2 light source modules 601 and 603 as shown in Figure 6 among the figure.Light source module 601 and 603 comprises first light emitting diode 605 respectively in order to produce first coloured light 600, second light emitting diode 607 in order to produce second coloured light 602 and the 3rd light emitting diode 609 in order to produce the 3rd coloured light 604, and wherein first, second and third coloured light 600,602 and 604 is mixed into particular light ray 606.This embodiment also comprises control circuit 611, is electrically connected to light source module 601 and 603, and it is luminous to switch sequence period toggle lights module 601 and 603 with all throw-over rates and, to reach the purpose of power saving and low heating.Light source module 601 and 603 can be that Fig. 1 is to light source module shown in Figure 5.
If switching rate is too slow, during the rapid rate that do not exceed promptly that naked eyes can differentiate, but naked eyes are luminous successively with the identification light source module in a switching cycle, can't reach the pointolite formation line source that the single light source module is produced or the purpose of area source.Therefore, the speed that the switching rate need can be differentiated faster than naked eyes is preferably and is not slower than 1/120 second, and promptly switching rate is 1/120 second the most slowly.
Though the embodiment of Fig. 6 only with 2 light source module explanations, is familiar with this technical field person and can spreads to easily to the enforcement pattern that surpasses 2 light source modules.For example, LCD can be considered as a unit with per 8 light source modules, and each unit controls its sequence of light by a control circuit.
On practice, because it is little that the mould of production light source module is produced the mould of large-scale light source, therefore light-source system of the present invention (large-scale light source) relies on the characteristics that a plurality of light source module is formed, and has avoided making the needs of large mold, so can reach cost-effective purpose.
Though the above embodiments all are example with the LCD, yet the present invention does not only limit and can be applied to this.For example, the person of ordinary skill in the field can be applied to projector (comprising front projection formula and back projection type) or other display device with light source module of the present invention according to above disclosure.In other words, light-source system of the present invention also can be projector or other display device.
In sum, though the present invention discloses as above with a preferred embodiment, right its is not in order to limit embodiments of the present invention, any person of ordinary skill in the field, in the content and impartial technical scope thereof that does not break away from spirit and claim of the present invention and defined, can do various changes and modification.
Claims (26)
1. light source module is characterized in that comprising:
First light emitting diode is in order to produce first coloured light;
Second light emitting diode is in order to produce second coloured light;
The 3rd light emitting diode is in order to produce the 3rd coloured light; And
Control circuit is electrically connected to this first, second and third light emitting diode, and switches this first, second and third lumination of light emitting diode of sequence period switching with all throw-over rates and, is mixed into particular light ray by this first, second and third coloured light.
2. light source module according to claim 1 is characterized in that this switching rate is 1/120 second the most slowly.
3. light source module according to claim 1 is characterized in that this transfer sequence is:
(1) this first lumination of light emitting diode;
(2) this second lumination of light emitting diode;
(3) the 3rd lumination of light emitting diode; And
(4) this first, second and third light emitting diode is simultaneously luminous.
4. light source module according to claim 1 is characterized in that this first coloured light is blue for red, this second coloured light for green, the 3rd coloured light.
5. light source module according to claim 4 is characterized in that this particular light ray is a white light.
6. light source module according to claim 4 is characterized in that also comprising the 4th light emitting diode, and in order to produce the 4th coloured light, wherein this first, second, third and the 4th coloured light is mixed into this particular light ray.
7. light source module according to claim 6 is characterized in that the 4th coloured light is for yellow.
8. light source module according to claim 6 is characterized in that this transfer sequence is:
(1) this first lumination of light emitting diode;
(2) this second lumination of light emitting diode;
(3) the 3rd lumination of light emitting diode;
(4) the 4th lumination of light emitting diode; And
(5) this first, second, third and the 4th light emitting diode is simultaneously luminous.
9. light source module according to claim 7 is characterized in that this particular light ray is a white light.
10. light source module according to claim 1 is characterized in that also comprising light-guide device, and in order to conduct this particular light ray, this light-guide device comprises first side, and this first, second and third light emitting diode is positioned at this first side.
11. light source module according to claim 10, it is characterized in that also comprising diffraction element and reflecting element, this light-guide device also comprises second side, and wherein this diffraction element is positioned at this second side, and this reflecting element is positioned at the opposite side of this diffraction element with respect to this light-guide device.
12. light source module according to claim 10 is characterized in that this light-guide device also comprises second side, this second side has convex-concave surface.
13. light source module according to claim 10 is characterized in that also comprising prism array, this light-guide device also comprises the 3rd side, and this prism array is positioned at the 3rd side.
14. a light-source system is characterized in that comprising:
A plurality of light source modules, each light source module comprises:
First light emitting diode is in order to produce first coloured light;
Second light emitting diode is in order to produce second coloured light; And
The 3rd light emitting diode is in order to produce the 3rd coloured light;
Wherein this first, second and third coloured light is mixed into particular light ray; And
Control circuit is electrically connected to this a plurality of light source modules, and it is luminous to switch these a plurality of light source modules of sequence period switching with all throw-over rates and.
15. light-source system according to claim 14 is characterized in that this switching rate is 1/120 second the most slowly.
16. light-source system according to claim 14 is characterized in that this first coloured light is blue for red, this second coloured light for green, the 3rd coloured light.
17. light-source system according to claim 16 is characterized in that this particular light ray is a white light.
18. light-source system according to claim 16 is characterized in that each light source module also comprises the 4th light emitting diode, in order to produce the 4th coloured light, wherein this first, second, third and the 4th coloured light is mixed into this particular light ray.
19. light-source system according to claim 18 is characterized in that the 4th coloured light is for yellow.
20. light-source system according to claim 19 is characterized in that this particular light ray is a white light.
21. light-source system according to claim 14 is characterized in that each light source module also comprises a light-guide device, in order to conduct this particular light ray, this light-guide device comprises first side, and this first, second and third light emitting diode is positioned at this first side.
22. light-source system according to claim 21, it is characterized in that each light source module also comprises a diffraction element and a reflecting element, this light-guide device also comprises second side, and this diffraction element is positioned at this second side, and this reflecting element is positioned at the opposite side of this diffraction element with respect to this light-guide device.
23. light-source system according to claim 21 is characterized in that this light-guide device also comprises second side, this second side has convex-concave surface.
24. light-source system according to claim 21 is characterized in that each light source module also comprises prism array, this light-guide device also comprises the 3rd side, and this prism array is positioned at the 3rd side.
25. light-source system according to claim 14 is characterized in that this light-source system is a LCD.
26. light-source system according to claim 14 is characterized in that this light-source system is a projector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510090933 CN1920639A (en) | 2005-08-22 | 2005-08-22 | Light source system and light source module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510090933 CN1920639A (en) | 2005-08-22 | 2005-08-22 | Light source system and light source module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1920639A true CN1920639A (en) | 2007-02-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510090933 Pending CN1920639A (en) | 2005-08-22 | 2005-08-22 | Light source system and light source module |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102004379A (en) * | 2009-08-28 | 2011-04-06 | 三洋电机株式会社 | Video projector and image display system |
| CN108266694A (en) * | 2018-02-13 | 2018-07-10 | 上海小糸车灯有限公司 | The vehicle light illumination devices and methods therefor of different function is realized by sharing light-emitting zone |
-
2005
- 2005-08-22 CN CN 200510090933 patent/CN1920639A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102004379A (en) * | 2009-08-28 | 2011-04-06 | 三洋电机株式会社 | Video projector and image display system |
| CN102004379B (en) * | 2009-08-28 | 2012-07-25 | 三洋电机株式会社 | Video projector and image display system |
| CN108266694A (en) * | 2018-02-13 | 2018-07-10 | 上海小糸车灯有限公司 | The vehicle light illumination devices and methods therefor of different function is realized by sharing light-emitting zone |
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