CN100363811C - Surface shaped luminous source construction - Google Patents
Surface shaped luminous source construction Download PDFInfo
- Publication number
- CN100363811C CN100363811C CNB031423817A CN03142381A CN100363811C CN 100363811 C CN100363811 C CN 100363811C CN B031423817 A CNB031423817 A CN B031423817A CN 03142381 A CN03142381 A CN 03142381A CN 100363811 C CN100363811 C CN 100363811C
- Authority
- CN
- China
- Prior art keywords
- guide plate
- luminous zone
- light guide
- cold cathode
- ccfl
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Planar Illumination Modules (AREA)
Abstract
The present invention relates to a planar light source element which comprises a rectangular light guide plate and a cold cathode lamp tube, wherein the lamp tube is arranged on one side edge of the light guide plate, and comprises an effective light emitting zone and two ineffective light emitting zones. The ineffective light emitting zones are arranged on both ends of the lamp tube, and the effective light emitting zone are arranged between the ineffective light emitting zones. Each ineffective light emitting zone is in an arc shape, and the two ineffective light emitting zones are correspondingly arranged in the corner of the rectangular light guide plate.
Description
Technical field
The present invention relates to a kind of flat light source member, particularly relate to a kind ofly, can avoid producing the flat light source member of dark space by arc cold cathode fluorescent lamp (CCFL) is set.
Background technology
Along with semiconductor and flat-panel screens improvement of Manufacturing Technology, known as LCD display device such as (LCD), for example be applied in the notebook various electronic products such as (PC).
In general, in the flat light source member of LCD (LCD), (Cold Cathode Fluorescent Lamp is CCFL) as a light emitting source by a cold cathode fluorescent lamp usually.At first consult Fig. 1, the figure shows the synoptic diagram of a known flat light source member, wherein arrow is represented the direction that light is advanced.As shown in the figure, 1 central authorities have a light-emitting area 2 in a rectangular light guide plate, and wherein the cold cathode fluorescent lamp 3 (CCFL) of a strip is oppositely arranged on a side of light guide plate 1; In addition, light enters light guide plate 1 after sending via cold cathode fluorescent lamp 3 (CCFL), and forms an area source by above-mentioned light-emitting area 2 reflections.
Because cold cathode fluorescent lamp 3 (CCFL) is luminous by electrode tip discharge bump tube inner wall fluorescent material, therefore known cold cathode fluorescent lamp 3 (CCFL) two ends have the darker invalid luminous zone 31 of a brightness usually near the electrode place, and form an effective luminous zone 32 between the invalid luminous zone 31 of left and right end.In general, invalid luminous zone 31 is limited to brightness and is lower than the following zone of whole fluorescent tube average brightness value.
In addition, based on the restriction in display interior space, the range of size that in general above-mentioned strip cold cathode fluorescent lamp 3 (CCFL) can be provided with only is slightly larger than the length of light guide plate 1.As shown in fig. 1, the scope that a cold cathode fluorescent lamp 3 (CCFL) can be provided with that is to say that the length of fluorescent tube must be less than a maximum constraints length L between a left border A and a right side boundary A '.So, the invalid luminous zone 31 that above-mentioned cold cathode fluorescent lamp 3 (CCFL) two ends brightness is darker will be because of being positioned at left and right side place, light guide plate 1 below relatively, thereby and then make the brightness of light-emitting area 2 lower corners lower to produce a dark space 21.
As shown in Figure 1, in the above-mentioned known flat light source member, the dark space 21 that is positioned at light-emitting area 2 lower corners will make flat-panel screens produce the phenomenon of brightness irregularities, and then influence the display quality of flat-panel screens integral body.Therefore, be easy to generate the shortcoming of dark space 23, how design and a kind ofly make brightness more even at known cold cathode fluorescent lamp 3 (CCFL), and the flat light source member that can avoid the dark space to produce, an important problem become really.
Summary of the invention
Cause the shortcoming of dark space 21 generations easily in view of above-mentioned known cold cathode fluorescent lamp 3 (CCFL), the present invention proposes a kind of flat light source member, by disposing the cold cathode fluorescent lamp of an arc, can avoid the generation of dark space, and can provide a brightness more even and simply constructed flat light source member.
In order to achieve the above object, the present invention proposes a kind of flat light source member, comprises a rectangular light guide plate, and wherein at least one corner in light guide plate is circular arc; And a fluorescent tube, being positioned at a side of this light guide plate, it comprises an effective luminous zone and two invalid luminous zones, wherein effectively the luminous zone is between invalid luminous zone, and at least one invalid luminous zone is oppositely arranged on the circular arc corner of light guide plate.
At least one corner of light guide plate of the present invention is circular arc, therefore can moderately produce the optically focused effect, and compile the light of invalid luminous zone, and then improve the brightness of light-emitting area corner.
The present invention can avoid the generation of above-mentioned dark space, and can provide a brightness more even and simply constructed flat light source member by the cold cathode fluorescent lamp (CCFL) of configuration one arc.
Description of drawings
Fig. 1 represents the synoptic diagram of known flat light source member;
Fig. 2 represents the synoptic diagram of first embodiment of the invention;
Fig. 3 represents the synoptic diagram of second embodiment of the invention.
Embodiment
First embodiment
The present invention is improved at the known flat light source member of Fig. 1.And consult Fig. 2, the figure shows the synoptic diagram of first embodiment among the present invention.As shown in the figure, a planar light source component comprises a cold cathode fluorescent lamp 4 (CCFL) and a rectangular light guide plate 5.Wherein, above-mentioned cold cathode fluorescent lamp 4 (CCFL) is an arc, be oppositely arranged on a side of light guide plate 5, comprise an effective luminous zone 42 and two invalid luminous zones 41, wherein above-mentioned invalid luminous zone 41 is positioned at the two ends of cold cathode fluorescent lamp 4 (CCFL), and effectively luminous zone 42 is between above-mentioned invalid luminous zone 41.
Wherein, above-mentioned rectangular light guide plate 5 central authorities have a light-emitting area 6.The light-emitting area 6 that light enters light guide plate 5 central authorities after sending via cold cathode fluorescent lamp 4 (CCFL), and by forming an area source after above-mentioned light-emitting area 6 reflections.
As mentioned above, invalid luminous zone 41 qualification brightness are lower than the following zone of whole fluorescent tube average brightness value.Because above-mentioned cold cathode fluorescent lamp 4 (CCFL) is an arc, therefore be positioned at the invalid luminous zone 41 at the left and right two ends of cold cathode fluorescent lamp 4 (CCFL), can extend out to by the geometrical property of its arc between light guide plate 5 corners and left and right side border A, A ' the space (as shown in Figure 2).
In particular, configuration mode by above-mentioned arc cold cathode fluorescent lamp 4 (CCFL), can more general known pencil-shape lamp pipe have longer fluorescent tube length (even can greater than between left and right side border A, A ' maximum constraints length L), can increase its light emitting region simultaneously.In addition, after invalid luminous zone 41 bendings with two ends extend to the corner of light guide plate 5, can avoid invalid as is well known luminous zone 41 to occur because of the dark space that luminance shortage forms.
As shown in Figure 2, be positioned at effective luminous zone 42 of cold cathode fluorescent lamp 4 (CCFL) central authorities, can enter the light-emitting area 6 of central authorities fully via light guide plate 5 below throw lights, so can lower the influence of the invalid luminous zone 41 of lamp tube ends, and effectively improve the homogeneity of brightness.
Second embodiment
Then consult Fig. 3, the figure shows the synoptic diagram of second embodiment among the present invention.As shown in the figure, a planar light source component comprises a cold cathode fluorescent lamp 4 (CCFL) and a light guide plate 7.Wherein, above-mentioned cold cathode fluorescent lamp 4 (CCFL) is an arc, be oppositely arranged on a side of light guide plate 7, comprise an effective luminous zone 42 and two invalid luminous zones 41, wherein above-mentioned invalid luminous zone 41 is positioned at the two ends of cold cathode fluorescent lamp 4 (CCFL), and effectively luminous zone 42 is between above-mentioned invalid luminous zone 42.
Wherein, above-mentioned rectangular light guide plate 7 central authorities have a light-emitting area 6.The light-emitting area 8 that light enters light guide plate 7 central authorities after sending via cold cathode fluorescent lamp 4 (CCFL), and by forming an area source after above-mentioned light-emitting area 8 reflections.
As mentioned above, invalid luminous zone 41 qualification brightness are lower than the following zone of whole fluorescent tube average brightness value.Consult Fig. 3, because above-mentioned cold cathode fluorescent lamp 4 (CCFL) is an arc, therefore be positioned at the invalid luminous zone 41 at the left and right two ends of cold cathode fluorescent lamp 4 (CCFL), can extend out to by the geometrical property of its arc between light guide plate 7 corners and left and right side border A, A ' the space.
In particular, light guide plate 7 slightly becomes a rectangle in the present embodiment, and with respect to light guide plate 7 corners of invalid luminous zone 41, above-mentioned cold cathode fluorescent lamp 4 (CCFL) two ends, is provided with corresponding arc chord angle 71 (as shown in Figure 3).By being positioned at the arc chord angle 71 of light guide plate 7 corners, can produce a spotlight effect, and, so can effectively improve the brightness that is positioned at light-emitting area 8 corners in order to the light that the invalid luminous zone 41 of compiling the script luminance shortage is produced, avoid the generation of known dark space and improve luminescence efficiency.
In addition,, can more general known pencil-shape lamp pipe have longer fluorescent tube length (even can greater than between left and right side border A, A ' maximum constraints length L), therefore can increase its light emitting region by the cold cathode fluorescent lamp 4 (CCFL) that arc is set.In addition, after invalid luminous zone 41 bendings with two ends extend to light guide plate 7 corners, can avoid known and cause the generation of dark space because of invalid luminous zone 41 luminance shortage.
In sum, the invention is characterized in the cold cathode fluorescent lamp 4 (CCFL) that is provided with arc, and has the longer fluorescent tube length of more known strip fluorescent tube, extend out to the corner of light guide plate 7 by the geometrical property of its arc, can avoid light-emitting area 8 to be subjected to the influence of invalid luminous zone 41, and can avoid the dark space to produce.
In addition, utilize and be provided with arc chord angle 71 (as shown in Figure 3), can produce a spotlight effect, improve the shortcoming of known invalid luminous zone 41 luminance shortage, and can effectively improve the brightness that is positioned at light-emitting area 8 corners at light guide plate 7 corners corresponding to invalid luminous zone 41.
Though the present invention discloses with preferred embodiment; but it is not in order to limiting scope of the present invention, anyly has the knack of those skilled in the art, is not breaking away from the spirit and scope of the invention; can make many changes and retouching, so attached claims define after protection scope of the present invention.
Claims (5)
1. flat light source member comprises:
One rectangular light guide plate, wherein at least one corner in light guide plate is circular arc; And
One fluorescent tube is positioned at a side of this light guide plate, and it comprises an effective luminous zone and two invalid luminous zones, and wherein effectively the luminous zone is between invalid luminous zone, and at least one invalid luminous zone is oppositely arranged on the circular arc corner of light guide plate.
2. flat light source member as claimed in claim 1, wherein invalid luminous zone is an arc.
3. flat light source member as claimed in claim 1, wherein effectively the luminous zone is an arc.
4. flat light source member as claimed in claim 1, wherein the length of fluorescent tube is greater than the length of side.
5. flat light source member as claimed in claim 1, wherein fluorescent tube is a cold cathode fluorescent lamp (CCFL).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031423817A CN100363811C (en) | 2003-06-10 | 2003-06-10 | Surface shaped luminous source construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031423817A CN100363811C (en) | 2003-06-10 | 2003-06-10 | Surface shaped luminous source construction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1567053A CN1567053A (en) | 2005-01-19 |
| CN100363811C true CN100363811C (en) | 2008-01-23 |
Family
ID=34471101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031423817A Expired - Fee Related CN100363811C (en) | 2003-06-10 | 2003-06-10 | Surface shaped luminous source construction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100363811C (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6231202B1 (en) * | 1998-08-20 | 2001-05-15 | Matsushita Electric Industrial Co., Ltd. | Lighting unit and liquid crystal display device using the same |
| JP2002008408A (en) * | 2000-04-15 | 2002-01-11 | 光燮 ▲チョー▼ | Fluorescent lamp, backlight, and operating method for backlight |
| JP2002042532A (en) * | 2000-07-19 | 2002-02-08 | Sharp Corp | Back light device and liquid-crystal display device using it |
| CN1338657A (en) * | 2000-07-28 | 2002-03-06 | 株式会社日立制作所 | Liquid crystal display device |
-
2003
- 2003-06-10 CN CNB031423817A patent/CN100363811C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6231202B1 (en) * | 1998-08-20 | 2001-05-15 | Matsushita Electric Industrial Co., Ltd. | Lighting unit and liquid crystal display device using the same |
| JP2002008408A (en) * | 2000-04-15 | 2002-01-11 | 光燮 ▲チョー▼ | Fluorescent lamp, backlight, and operating method for backlight |
| JP2002042532A (en) * | 2000-07-19 | 2002-02-08 | Sharp Corp | Back light device and liquid-crystal display device using it |
| CN1338657A (en) * | 2000-07-28 | 2002-03-06 | 株式会社日立制作所 | Liquid crystal display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1567053A (en) | 2005-01-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20040183962A1 (en) | Backlight module and liquid crystal display formed therefrom | |
| US20080088770A1 (en) | Lens and backlight unit, liquid crystal display having the same and method thereof | |
| TWI418899B (en) | Liquid crystal display and back-light module thereof | |
| CN1746742A (en) | Backlight assembly and liquid crystal display using the same | |
| US7436119B2 (en) | Flat panel fluorescent lamp and fabricating method thereof | |
| JP2001060409A (en) | Sheet-like lighting system | |
| US6977466B2 (en) | Flat lamp for emitting lights to a surface area and liquid crystal display using the same | |
| US7229193B2 (en) | Backlight unit | |
| CN100363811C (en) | Surface shaped luminous source construction | |
| JP2004134281A (en) | Backlight device and liquid crystal display | |
| US20110134660A1 (en) | Backlight Module Structure | |
| JP2007294252A (en) | Light emitting panel, luminaire, and electric illumination panel | |
| TW455898B (en) | Discharge luminescent device | |
| JPS61198189A (en) | Lighting apparatus for liquid crystal display | |
| CN2834109Y (en) | Casing panel and its light-guiding strip | |
| CN103375705B (en) | Light source module | |
| KR100833205B1 (en) | A reflector having gradually inclined step type multiple parabolic surfaces for ultra violet lamp and ultra violet focussing device having the same | |
| US7671524B2 (en) | Flat light source having phosphor patterns in an edge region | |
| JP3165440U (en) | Cold cathode fluorescent lamp | |
| JP2006202513A (en) | Lighting device | |
| CN2687834Y (en) | Efficient fluo rescent lamp | |
| KR100595935B1 (en) | Back light of direct light type | |
| CN112147815A (en) | Lamp panel for enhancing partitioned dimming effect of miniLED backlight source | |
| KR101274021B1 (en) | backlight unit | |
| CN201402791Y (en) | Flat-panel type high-efficient energy-saving illuminating screen |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080123 Termination date: 20160610 |