CN1740871A - Display device and back light module thereof - Google Patents
Display device and back light module thereof Download PDFInfo
- Publication number
- CN1740871A CN1740871A CN 200510103907 CN200510103907A CN1740871A CN 1740871 A CN1740871 A CN 1740871A CN 200510103907 CN200510103907 CN 200510103907 CN 200510103907 A CN200510103907 A CN 200510103907A CN 1740871 A CN1740871 A CN 1740871A
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- fluorescent tube
- low pressure
- backlight module
- base plate
- pressure side
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Abstract
The present invention relates to a display and its backlight module. The backlight module includes back board and at least a lamp tube, the back board includes a bottom board, a high-voltage end and a low-voltage end. Said bottom board is connected with high-voltage end and low-voltage end, the lamp tube includes two electrodes which are respectively connected with high-voltage end and low-voltage end. The display includes the above-mentioned backlight module.
Description
Technical field
The invention relates to a kind of display and backlight module thereof, particularly relevant for the modes of emplacement of fluorescent tube to reduce the magnitude of leakage current of fluorescent tube.
Background technology
See also Fig. 1, traditional backlight module 10 includes backboard 11 and fluorescent tube 12, backboard 11 comprises base plate 111, high-pressure side 112 and low pressure end 113, fluorescent tube 12 comprises two electrodes 121,122, electrode 122,121 electrically connect with high-pressure side 112 and low pressure end 113 respectively, traditional tube 12 is provided with thereon in the mode that is parallel to backboard 11, but this mode of be arrangeding in parallel can make fluorescent tube 12 because swim capacity effect, and cause the facts of leakage current (current leakage) to take place, see also Fig. 2, line segment T0 is that fluorescent tube 12 is changed by the leakage current number percent of high-pressure side 112 toward low pressure end 113 directions, by line segment T0 as can be known, leakage current number percent % in the fluorescent tube 12 can be risen gradually by the distance L of high-pressure side 112 to low pressure end 113, make the closer near the fluorescent tube briliancy the low pressure end 113 more and more lower, this phenomenon not only causes the luminance nonuniformity of backlight module 10, more can waste electric power.
Summary of the invention
In order to improve above-mentioned shortcoming, the invention provides a kind of display and backlight module thereof, comprise backboard and at least one fluorescent tube, backboard comprises a base plate, a high-pressure side and a low pressure end, and this base plate connects high-pressure side and low pressure end, and fluorescent tube comprises two electrodes, electrically connect high-pressure side and low pressure end respectively, wherein, folder one acute angle between fluorescent tube and base plate is to reduce the number percent of fluorescent tube leakage current.
It should be noted that fluorescent tube and base plate have a spacing, spacing is increased towards the low pressure end direction gradually by high-pressure side.
It should be noted that the present invention comprises that also many fixed parts of being located on the backboard are with fixed lamp tube.
It should be noted that fluorescent tube of the present invention is cold cathode fluorescent lamp (CCFL).
In addition, display of the present invention comprises above-mentioned backlight module.
For above and other objects of the present invention, feature and advantage can be become apparent, hereinafter enumerate preferred embodiment especially, and conjunction with figs., be described in detail below.
Description of drawings:
Fig. 1 is the traditional backlight module diagram;
Fig. 2 is the graph of a relation of fluorescent tube and leakage current number percent in the traditional backlight module;
Fig. 3 is a backlight module synoptic diagram of the present invention;
Fig. 4 be tradition with backlight module of the present invention in the comparison diagram of fluorescent tube and leakage current number percent.
Symbol description.
Conventional art
10 backlight modules
11 backboards
111 base plates
112 high-pressure sides
113 low pressure ends
12 fluorescent tubes
121,122 electrodes
The present invention
20 backlight modules
21 backboards
211 base plates
212 high-pressure sides
213 low pressure ends
22 fluorescent tubes
221,222 electrodes
23,24 fixed parts
T0, T1 line segment
D1 first spacing
D2 second spacing
The L distance
The θ acute angle
Embodiment
See also Fig. 3, backlight module 20 comprises backboard 21, fluorescent tube 22 and fixed part 23,24, fixed part 23,24 is located at backboard 21 2 ends, in order to fixed lamp tube 22, backboard 21 includes base plate 211, high-pressure side 212 and low pressure end 213, and base plate 211 is located between high-pressure side 212 and the low pressure end 213, and fluorescent tube 22 comprises two electrodes 221,222, fluorescent tube 22 is by electrode 221,222 and high-pressure side 212 and low pressure end 213 electric connections, and fluorescent tube 22 and base plate 211 folders one acute angle theta.In Fig. 3, can find out, near having first space D 1 between near fluorescent tube 22 the high-pressure side 212 and the base plate 211, and near having second space D 2 between near fluorescent tube 22 the low pressure end 213 and the base plate 211, wherein first space D 1 is little than second space D 2, and distance is increased towards low pressure end 213 directions gradually by high-pressure side 212 between fluorescent tube 22 and the base plate 211.In addition, in present embodiment, fluorescent tube 22 is cold cathode fluorescent lamp (CCFL).
Please arrange in pairs or groups and consult Fig. 3, the correlation formula of leakage current (current leakage) is %=ζ * A/d, and wherein, % is the number percent of leakage current, ζ is a dielectric coefficient, A is the projected area of fluorescent tube, and d is the spacing of fluorescent tube and backboard, because the projected area A of fluorescent tube 22 on base plate 211 is definite value, when ζ (dielectric coefficient) more hour, magnitude of leakage current is few more, and perhaps when the spacing d of fluorescent tube 22 and base plate 211 was big more, magnitude of leakage current was few more.Because the leakage current number percent % in the fluorescent tube 22 can be risen gradually by the distance L of high-pressure side 212 to low pressure end 213, so the present invention is the spacing d that utilizes control fluorescent tube 22 and base plate 211, therefore among Fig. 3 of the present invention, to increase gradually towards second space D 2 with base plate 211 first space D 1 near the fluorescent tube 22 at high-pressure side 212 places, so can make the closer to fluorescent tube 22 magnitudes of leakage current at low pressure end 213 places and reduce near low pressure end 213 places.
See also Fig. 4, line segment T0 is that traditional tube 12 is by the leakage current number percent variation (please arrange in pairs or groups consult Fig. 1) of high-pressure side 112 toward low pressure end 113 directions, and line segment T1 is the leakage current number percent variation (please arrange in pairs or groups consult Fig. 3) of fluorescent tube 22 of the present invention by high-pressure side 212 past low pressure end 213 directions, scheme to compare line segment T0 and line segment T1 thus as can be known, because fluorescent tube 22 the closer to low pressure end 212 places, the number percent of its leakage current is big more, so the present invention will strengthen gradually the closer to the fluorescent tube 22 at low pressure end 212 places and the spacing of base plate 211, can fully reduce the leakage current of whole fluorescent tube 22, more can make the average and saving electric power of fluorescent tube 21 briliancy.
In addition, backlight module 20 of the present invention can be applicable in the display (not shown), for example is LCD, makes the integral brightness of display average, and the display of more saving electric power is provided.
Though the present invention with preferred embodiment openly as above; right its is not in order to qualification the present invention, any insider, without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention is as the criterion when looking claims person of defining.
Claims (4)
1. backlight module includes:
One backboard includes a base plate, a high-pressure side and a low pressure end, and this base plate is connected between this high-pressure side and this low pressure end and with this high-pressure side and this low pressure end; And
At least one fluorescent tube comprises two electrodes, electrically connects this high-pressure side and this low pressure end respectively;
Wherein, this fluorescent tube and this base plate press from both sides an acute angle.
2. backlight module according to claim 1 is characterized in that, wherein this fluorescent tube and this base plate have a spacing, and this spacing is increased towards this low pressure end direction gradually by this high-pressure side.
3. backlight module according to claim 1 is characterized in that it also comprises many fixed parts, and this fixed part is located on this backboard, in order to fix this fluorescent tube.
4. backlight module according to claim 1 is characterized in that, wherein this fluorescent tube is a cold cathode fluorescent lamp (CCFL).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510103907 CN1740871A (en) | 2005-09-15 | 2005-09-15 | Display device and back light module thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510103907 CN1740871A (en) | 2005-09-15 | 2005-09-15 | Display device and back light module thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1740871A true CN1740871A (en) | 2006-03-01 |
Family
ID=36093302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510103907 Pending CN1740871A (en) | 2005-09-15 | 2005-09-15 | Display device and back light module thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1740871A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7575342B2 (en) | 2006-05-25 | 2009-08-18 | Chunghwa Picture Tubes, Ltd. | Liquid crystal display and backlight module including tilted lamp tubes |
-
2005
- 2005-09-15 CN CN 200510103907 patent/CN1740871A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7575342B2 (en) | 2006-05-25 | 2009-08-18 | Chunghwa Picture Tubes, Ltd. | Liquid crystal display and backlight module including tilted lamp tubes |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |