CN2627536Y - Light source module arrangement of backlight module - Google Patents
Light source module arrangement of backlight module Download PDFInfo
- Publication number
- CN2627536Y CN2627536Y CN 03263328 CN03263328U CN2627536Y CN 2627536 Y CN2627536 Y CN 2627536Y CN 03263328 CN03263328 CN 03263328 CN 03263328 U CN03263328 U CN 03263328U CN 2627536 Y CN2627536 Y CN 2627536Y
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- Prior art keywords
- light
- guide plate
- light guide
- assembly structure
- backlight assembly
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Abstract
The utility model provides a backlight assembly structure applied to an LCD. The backlight assembly structure comprises a light guide plate with an incident end face; a first light emitting source positioned at the incident end face of the light guide plate to serve as the main light source of the backlight assembly structure; and a second light emitting source positioned on both sides of the incident end face of the light guide plate to serve as an auxiliary light source to eliminate dark corners of the backlight assembly.
Description
(1) technical field
The light source assembly structure of the relevant a kind of backlight assembly of the utility model refers to a kind of light source assembly structure that solves the dark angle problem of backlight assembly especially.
(2) background technology
Backlight assembly (Back Light Module) is the key part and component of panel of LCD (LCD Panel), because liquid crystal itself can't be luminous, the function of backlight assembly just is to supply the light source that brightness is abundant and be evenly distributed, and makes normally show image of panel.Generally speaking, backlight assembly can be divided into " straight-down negative " and " side-light type " two kinds of designs.Straight-down negative design is that fluorescent tube is placed under the assembly, and because of accommodation space becomes big, can use the fluorescent tube more than two to increase the intensity of light source, but relatively also increase the thickness and the weight of assembly.Many tubes also increase power consumption simultaneously, thereby are applicable to portability and more not fastidious LCD monitor or the LCD TV of space requirement.And the backlight assembly 1 that adopts side-light type to design, shown in Fig. 1 (a) ~ (b), its have light guide plate 11, cold cathode fluorescent lamp (Cold Cathode Fluorescent Lamp, CCFL) 12, light-guiding shade 13, reflector plate 14, diffusion sheet 15, prismatic lens 16 and framework 17.Usually only adopt single cold cathode fluorescent lamp 12 as light source, and utilize the light guide plate 11 that is wedge shape to design the control of strengthening light going direction, difficulty is higher relatively.And this kind design is a demand of considering users such as " gently ", " approaching ", " power saving ", so present stage is mainly used in the LCD panel that notebook computer is used.
Generally when using notebook computer, how the user can perceive corner screen and have darker phenomenon, this is because the employed fluorescent tube of side-light type backlight assembly " cold cathode fluorescent lamp ", luminous intensity deficiency in high-low pressure zone, two ends, and make that the corner of backlight assembly is dark excessively, and then have influence on the display effect of LCD display, shown in Fig. 1 (b), this backlight assembly 1 has dark angle 18, two places.And in order to address this problem, knownly normally increase by the length with cold cathode fluorescent lamp 12, or cold cathode fluorescent lamp 12 is zoomed out increasing the scope of its illumination, but effects that both improve are all limited.And, increase cold cathode fluorescent lamp 12 or cold cathode fluorescent lamp 12 zoomed out the area that all can increase the LCD panel frame.Therefore, stress gently at notebook computer now more, approach, under the small and exquisite situation, this is real does not see for dealer institute is happy.
(3) utility model content
Fundamental purpose of the present utility model is to provide a kind of light source assembly structure of backlight assembly, to improve the dark excessively problem in LCD corner.
Another purpose of the present utility model is to provide a kind of light source assembly structure of backlight assembly, be in high-low pressure zone, the both sides of script cold cathode fluorescent lamp, set up a light emitting diode (LED), more as secondary light source, in order to reinforcement corner illumination, and then improve the problem at dark angle.
According to the utility model backlight assembly structure on the one hand, be to be applied to a LCD, comprise: a light guide plate has an incident end face; One first illuminating source is the incident end face that is positioned at light guide plate, with the main light source as the backlight assembly structure; And one second illuminating source, be the both sides that are positioned at the incident end face of light guide plate, to make backlight assembly not have luminous dark angle as secondary light source.
According to above-mentioned conception, backlight assembly can be the side-light type backlight assembly, and first illuminating source can be cold cathode fluorescent lamp (CCFL), and second illuminating source is at least two light emitting diodes (LEDs), and light guide plate is to be a wedge shape light guide plate.
In addition, second illuminating source has relative oblique angle and is symmetricly set in the both sides of incident end face.
In addition, light guide plate also includes a bottom surface and an exit facet.
As mentioned above, the bottom surface of light guide plate is to have a plurality of sites (patterns), goes into to inject the light of light guide plate in order to interfere first and second illuminating source.
Simultaneously, the backlight assembly structure also includes: a light-guiding shade, in order to covering first illuminating source, and the light that first illuminating source is sent is reflected into light guide plate, a reflector plate, and be positioned under the bottom surface of light guide plate, with the light reflected back light guide plate that will spill by the bottom surface; One diffusion sheet is positioned on the exit facet of light guide plate, so that being more evenly distributed of the light of light guide plate outgoing; And a prismatic lens, be positioned on the diffusion sheet, to revise direction of light, reach the effect of optically focused.
According to the utility model a kind of light source assembly structure on the other hand, be to be applied to a backlight assembly, comprise: one first illuminating source, in order to main light source as backlight assembly; And one second illuminating source, be the left and right sides that is positioned at aforementioned first illuminating source, in order to secondary light source, by the collocation of first, second illuminating source, in order to do making this backlight assembly not have luminous dark angle as backlight assembly.
According to above-mentioned conception, backlight assembly can be the side-light type backlight assembly, and first illuminating source can be cold cathode fluorescent lamp (CCFL), and second illuminating source can be at least two light emitting diodes (LEDs).
In addition, backlight assembly is to include a light guide plate, and it has an exit facet, a bottom surface, and an incident end face, and wherein light guide plate is to be a wedge shape light guide plate.
In addition, first illuminating source is the incident end face that is positioned at light guide plate, enter light guide plate so that an incident light to be provided, and second illuminating source is the both sides that have relative oblique angle and be symmetricly set in incident end face, enters light guide plate so that an auxiliary incident light to be provided.
Simultaneously, the bottom surface of light guide plate has a plurality of sites (patterns), goes into to inject the light of light guide plate to interfere first illuminating source and second illuminating source.
As mentioned above, backlight assembly also includes: a light-guiding shade, covering first illuminating source, and the light that first illuminating source is sent is reflected into light guide plate, a reflector plate, is positioned under the bottom surface of light guide plate, with light reflected back light guide plate, a diffusion sheet that will spill by the bottom surface, be positioned on the exit facet of light guide plate, so that being more evenly distributed and a prismatic lens of the light of light guide plate outgoing is positioned on the diffusion sheet, to revise direction of light, reach the effect of optically focused.
(4) description of drawings
The utility model is by following accompanying drawing and detailed description and can obtained more deep understanding.
Fig. 1 (a) is the vertical view for known backlight assembly;
Fig. 1 (b) is the structure side view for known backlight assembly;
Fig. 2 is the vertical view according to a preferred embodiment of the light source assembly structure of the utility model conception backlight assembly;
Fig. 3 is the structure skeleton view according to a preferred embodiment of the light source assembly structure of the utility model conception backlight assembly;
Fig. 4 is the structural representation according to another preferred embodiment of the light source assembly structure of the utility model conception backlight assembly;
Fig. 5 is the structural representation according to the another preferred embodiment of the light source assembly structure of the utility model conception backlight assembly; And
Fig. 6 is the structural representation of a preferred embodiment again according to the light source assembly structure of the utility model conception backlight assembly.
(5) has the body embodiment
The light source assembly structure of the utility model backlight assembly can fully be understood by following embodiment explanation, make what person skilled in the art person can finish according to this.Right enforcement of the present utility model is not can be limited it by the following example to implement kenel.
See also Fig. 2, it is the vertical view according to a preferred embodiment of the light source assembly structure of the utility model backlight assembly that conception develops.And please consult Fig. 3 simultaneously, it is to be the structural representation according to the utility model light source assembly structure one preferred embodiment of the backlight assembly that conception develops.Shown in Fig. 2,3, backlight assembly 2 comprises: light guide plate 21, cold cathode fluorescent lamp (CCFL) 22, light-guiding shade 23, reflector plate 24, two light emitting diode (LED) 25 and frameworks 27.Wherein, the outward appearance of described light guide plate 21 is to be designed to wedge type, and has incident end face 211 and bottom surface 212, then is printed with a plurality of sites 26 on bottom surface 212.And cold cathode fluorescent lamp 22 is the positions that are positioned at the incident end face 211 of light guide plate 21.Simultaneously, cold cathode fluorescent lamp 22 is also covered by light-guiding shade 23.
The main luminous mechanism of described backlight assembly 2 is: the cold cathode fluorescent lamp 22 that is positioned at incident end face 211 makes light go into to inject in the light guide plate 21 as light source.Then,, therefore, enter the light of light guide plate 21, can reflect upwards because of the bottom surface 212 that runs into light guide plate 21 because light guide plate 21 is a taper structure.The light that spills bottom surface 212 then can be reflected back toward in the light guide plate 21 because of the setting of reflector plate 24.Be used for non-light reflection towards light guide plate 21 is entered light guide plate 21 as for 23 of light-guiding shades, to strengthen light intensity.Simultaneously, 26 of a plurality of sites on the bottom surface 212 can help the light diffusion, be evenly distributed.Under this main luminous mechanism, cold cathode fluorescent lamp 22 sent only as a main light source.
Then, outside main luminous mechanism, other uses an auxiliary light emission mechanism in the utility model, to remedy the defective (that is the corner is dark excessively) of main luminous mechanism in the prior art.Auxiliary light emission mechanism of the present utility model is the both sides (that is high-low pressure zone) at the incident end face of light guide plate, sets up two light emitting diodes (LED) 25 again, with as secondary light source.This auxiliary light emission mechanism is the setting by light emitting diode 25, illuminates dark angle of the prior art, and remedies the deficiency of two ends, the high-low pressure zone light intensity of cold cathode fluorescent lamp 22.
In the side-light type backlight assembly, why dark angle can form, and mainly is because can there be certain limitation in light intensity at two ends, the high-low pressure of cold cathode fluorescent lamp 22 zone because of technical restriction.And can't compare with the brightness at fluorescent tube center, also therefore can't make the suffered light intensity unanimity of whole light guide plate, and then make LCD in the dark excessively phenomenon of corner appearance meeting.Therefore, if this light guide plate insufficient light locate to be provided with other secondary light source, do not influencing other structures, also need not increase under the situation of area of LCD, be the method for a practicality really.
As shown in Figure 3, in the utility model, light emitting diode 25 is arranged at the both sides of light guide plate 21 incident end faces 211, with as secondary light source.And two light emitting diodes are the oblique angle of a symmetry each other.By diagram as can be known, be positioned at the light emitting diode 25 in light guide plate 21 corners, can scattered beam, so that the light source in light guide plate 21 corners to be provided, remedied the shortcoming of cold cathode fluorescent lamp 22 two ends high-low pressure regional luminance deficiencies.And,, therefore, can guarantee that dark angle is bound to be subjected to light, so the situation in the prior art can achieve a solution because light emitting diode 25 directly is arranged at the corner that dark angle takes place.
In addition, the position of the utility model secondary light source setting can be adjusted according to need.See also Fig. 4, it is the structural representation according to another preferred embodiment of the utility model conception.As shown in FIG., the position of light emitting diode 25 only need place the corner of light guide plate 21 to get final product, and might not be limited in the corner cut of light guide plate 21, can solve dark angle problem.Simultaneously, in this case, therefore the length of cold cathode fluorescent lamp 25 more can shorten.Perhaps, also can light emitting diode be set mode as shown in Figure 5, can reach the same effect equally.
The purpose that the utility model is provided with secondary light source is luminous energy is adjusted to the zone that needs, and the brightness of whole LCD is reached unanimity.Therefore,, also can adjust the position that secondary light source is set, as shown in Figure 6, might not be limited in the corner of light guide plate 21 along with the position of required increase brightness region if the position of LCD briliancy deficiency is not to be positioned at the corner.
In sum, light source assembly structure according to backlight assembly described in the utility model, be outside the illuminating source cold cathode fluorescent lamp (CCFL) of general LCD, add secondary light source light emitting diode (LED), and then solve the dark angle common in the LCD and the problem of briliancy deficiency.And, because the volume of light emitting diode is quite little, therefore can't influence the area of whole LCD, that is, do not need to increase the width of LCD frame, avoided the means of the dark angle of known solution problem yet, as: the lengthening cold cathode fluorescent lamp, or the distance of lengthening cold cathode fluorescent lamp and light guide plate, can suffer from the problem that must add big frame.In addition, because the setting of light emitting diode, the length of cold cathode fluorescent lamp even can therefore shorten, and then reduce pipe and press.
Claims (19)
1. a backlight assembly structure is applied to a LCD, it is characterized in that, comprises at least:
One light guide plate has an incident end face;
One first illuminating source is positioned at this incident end face of this light guide plate, with as main light source; And
One second illuminating source is positioned at the both sides of this incident end face of this light guide plate, with as secondary light source.
2. backlight assembly structure as claimed in claim 1 is characterized in that, this backlight assembly is to be a side-light type backlight assembly.
3. backlight assembly structure as claimed in claim 1 is characterized in that, this first illuminating source is to be a cold cathode fluorescent lamp.
4. backlight assembly structure as claimed in claim 1 is characterized in that, this second illuminating source is to be a light emitting diode.
5. backlight assembly structure as claimed in claim 1 is characterized in that, this light guide plate is to be a wedge shape light guide plate.
6. backlight assembly structure as claimed in claim 1 is characterized in that, this second illuminating source is relative oblique angle of tool and the both sides that are symmetricly set in this incident end face.
7. backlight assembly structure as claimed in claim 1 is characterized in that, this light guide plate also comprises a bottom surface and an exit facet.
8. backlight assembly structure as claimed in claim 7 is characterized in that, this bottom surface of this light guide plate is to have a plurality of sites, goes into to inject the light of this light guide plate to interfere this first illuminating source and this second illuminating source.
9. backlight assembly structure as claimed in claim 7 is characterized in that, this backlight assembly structure also comprises:
One light-guiding shade covering this first illuminating source, and is reflected into this light guide plate with the light that this first illuminating source is sent;
One reflector plate is positioned under this bottom surface of this light guide plate, with this light guide plate of light reflected back that will be spilt by this bottom surface;
One diffusion sheet is positioned at the top of this exit facet of this light guide plate, so that being more evenly distributed of the light of this light guide plate outgoing; And
One prismatic lens is positioned on this diffusion sheet, to revise direction of light, reaches the effect of optically focused.
10. a light source assembly structure is applied to a backlight assembly, it is characterized in that, comprises at least:
One first illuminating source is in order to as main light source; And
One second illuminating source is positioned at the both sides of this first illuminating source, with as secondary light source.
11. light source assembly structure as claimed in claim 10 is characterized in that, this backlight assembly is to be a side-light type backlight assembly.
12. light source assembly structure as claimed in claim 10 is characterized in that, this first illuminating source is for being to be a cold cathode fluorescent lamp.
13. light source assembly structure as claimed in claim 10 is characterized in that, this second illuminating source is to be a light emitting diode.
14. light source assembly structure as claimed in claim 10 is characterized in that this backlight assembly comprises a light guide plate, it has an exit facet, a bottom surface and an incident end face.
15. light source assembly structure as claimed in claim 14 is characterized in that, this light guide plate is to be a wedge shape light guide plate.
16. light source assembly structure as claimed in claim 14 is characterized in that, this main light emission light source is this incident end face that is positioned at this light guide plate, enters this light guide plate so that an incident light to be provided.
17. light source assembly structure as claimed in claim 14 is characterized in that, this auxiliary light emission light sources has relative oblique angle and is symmetricly set in the both sides of this incident end face, enters this light guide plate so that an auxiliary incident light to be provided.
18. light source assembly structure as claimed in claim 14 is characterized in that, this bottom surface of this light guide plate has a plurality of sites, goes into to inject the light of this light guide plate to interfere this first illuminating source and this second illuminating source.
19. light source assembly structure as claimed in claim 10 is characterized in that, this backlight assembly also comprises:
One light-guiding shade covering this first illuminating source, and is reflected into this light guide plate with the light that this first illuminating source is sent;
One reflector plate is positioned under this bottom surface of this light guide plate, with this light guide plate of light reflected back that will be spilt by this bottom surface;
One diffusion sheet is positioned at the top of this exit facet of this light guide plate; And
One prismatic lens is positioned on this diffusion sheet, to revise direction of light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03263328 CN2627536Y (en) | 2003-05-29 | 2003-05-29 | Light source module arrangement of backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03263328 CN2627536Y (en) | 2003-05-29 | 2003-05-29 | Light source module arrangement of backlight module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2627536Y true CN2627536Y (en) | 2004-07-21 |
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ID=34255648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03263328 Expired - Lifetime CN2627536Y (en) | 2003-05-29 | 2003-05-29 | Light source module arrangement of backlight module |
Country Status (1)
| Country | Link |
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| CN (1) | CN2627536Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7470053B2 (en) | 2005-04-01 | 2008-12-30 | Lite-On Technology Corp. | Back light module having concave-down luminance distribution |
| CN101655635B (en) * | 2008-08-19 | 2011-06-01 | 北京京东方光电科技有限公司 | Light guide device |
| CN102606956A (en) * | 2011-11-18 | 2012-07-25 | 友达光电股份有限公司 | Backlight module and light source module thereof |
| CN102913812A (en) * | 2011-08-01 | 2013-02-06 | 瀚宇彩晶股份有限公司 | Light source module structure |
| CN102954399A (en) * | 2011-08-16 | 2013-03-06 | 三星显示有限公司 | Backlight assembly and display apparatus having the same |
| CN103133946A (en) * | 2011-12-05 | 2013-06-05 | 奇菱光电股份有限公司 | Backlight module |
-
2003
- 2003-05-29 CN CN 03263328 patent/CN2627536Y/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7470053B2 (en) | 2005-04-01 | 2008-12-30 | Lite-On Technology Corp. | Back light module having concave-down luminance distribution |
| CN101655635B (en) * | 2008-08-19 | 2011-06-01 | 北京京东方光电科技有限公司 | Light guide device |
| US8100572B2 (en) | 2008-08-19 | 2012-01-24 | Beijing Boe Optoelectronics Technology Co., Ltd. | Light guide device |
| CN102913812A (en) * | 2011-08-01 | 2013-02-06 | 瀚宇彩晶股份有限公司 | Light source module structure |
| CN102954399A (en) * | 2011-08-16 | 2013-03-06 | 三星显示有限公司 | Backlight assembly and display apparatus having the same |
| CN102606956A (en) * | 2011-11-18 | 2012-07-25 | 友达光电股份有限公司 | Backlight module and light source module thereof |
| CN102606956B (en) * | 2011-11-18 | 2013-12-11 | 友达光电股份有限公司 | Backlight module and light source module thereof |
| CN103133946A (en) * | 2011-12-05 | 2013-06-05 | 奇菱光电股份有限公司 | Backlight module |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20130529 Granted publication date: 20040721 |