CN2161938Y - Background light plate for liquid crystal indicator - Google Patents
Background light plate for liquid crystal indicator Download PDFInfo
- Publication number
- CN2161938Y CN2161938Y CN 93217460 CN93217460U CN2161938Y CN 2161938 Y CN2161938 Y CN 2161938Y CN 93217460 CN93217460 CN 93217460 CN 93217460 U CN93217460 U CN 93217460U CN 2161938 Y CN2161938 Y CN 2161938Y
- Authority
- CN
- China
- Prior art keywords
- background
- tabula rasa
- liquid crystal
- light
- background light
- 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
Abstract
The utility model relates to a background light board used for a liquid crystal displayer, which is combined to compose by a body and a circuit board at the bottom. A background light region is arranged in the center of the body. A frame body is arranged at the circumference. A plurality of light-emitting diodes is welded on the circuit board. The light-emitting diodes are positioned in the background light region of the body. Reflecting barriers are arranged at the circumference of each light emitting diode, in order to reflect rays. Therefore, the dark band of the background light board is eliminated.
Description
The utility model relates to a kind of structure of background tabula rasa of liquid crystal display use.
LCD is called for short lcd, is widely used in clock and watch and other character or image display device.Because LCD itself is not luminous, its visualization portion must set off out by bias light thereafter, and this background light device claims the background tabula rasa.
Existing background tabula rasa is by light emitting diode (LED) and EL or other device formation, all is long-acting life-span and the low heat generations that utilize them.
The structure (as Fig. 1) of existing light emitting diode background tabula rasa, it comprises background tabula rasa body (10), is combined in the circuit board (11) of this body bottom, be welded with at least two row's light emitting diodes (12) on the circuit board, and be distributed in the bias light district (13) of body, generally speaking, the bias light district is in body center, then is lighttight framework around it.
As shown in Figure 2, because the distribution of light of light emitting diode (12) radiation is in having the angle A of certain limitation, when adjacent light emitting diode hypertelorism, can form blanking bar B on background tabula rasa surface, the bias light that the background tabula rasa is formed is inhomogeneous.Existing method, be with the light emitting diode in the bias light zone be provided with very dense.The shortcoming of the method is that speed of production is slowed down, and production cost improves.
The purpose of this utility model is to provide a kind of structure that makes cost reduction, unit area power consumption reduction, long service life, can eliminate the background tabula rasa of blanking bar.
The purpose of this utility model is to realize like this, the background tabula rasa is combined by the circuit board (30) of body (20) with the body bottom, body center is bias light district (22), be lighttight framework (21) on every side, be welded with several light emitting diodes (31) on the circuit board, and be arranged in the bias light district of body; Be provided with reflecting wall (50) around each light emitting diode, in order to reflection ray, to eliminate the blanking bar on the background tabula rasa.
The utility model advantage compared with prior art is, reflecting wall enlarges the lighting angle of light emitting diode, when adjacent light emitting diode hypertelorism, the background tabula rasa can not produce blanking bar yet, therefore when background tabula rasa equal and opposite in direction, can reduce the quantity of diode, thereby reduce the power consumption of cost and unit area.
Below in conjunction with accompanying drawing the utility model is described further:
Fig. 1 is the vertical view of prior art
Fig. 2 is the side partial cross-sectional of prior art
Fig. 3 is the stereographic map of the utility model preferred embodiment
Fig. 4 is the side partial cross-sectional of Fig. 3 along the A-A cross section
Fig. 5 is a local amplification stereogram of the present utility model
Embodiment one, and as shown in Figure 3, background tabula rasa body (20) is lighttight framework (21) on every side in the present embodiment, and central authorities are the bias light zone (22) of hollow.This body bottom is circuit board (30), is welded with several light emitting diodes (31) on the circuit board, is provided with the reflecting wall (50) of square frame shape around the light emitting diode (31).
As shown in Figure 4, reflecting wall (50) makes the light of light emitting diode (31) except directly injecting the bias light district, can also after reflecting wall (50) reflection, enter the bias light district,, thoroughly eliminate the blanking bar on the backlight in order to enlarge the lighting angle of each light emitting diode.
Embodiment two, and as shown in Figure 5, reflecting wall in the present embodiment (50) is an annular, and further feature is identical with embodiment 1.
Reflecting wall can be made the part of body, also moulding in addition; Can piece together system by several parts and form, also can be connected to each other is integral.Reflective wall is plane or cambered surface.
The production method in bias light district (22) can be to go up perfusion transparent resin (40) at each light emitting diode (31); Also can be with the whole perfusion resins in bias light district, must paste a translucent diaphragm (41) this moment at body surface, in order to the brightness of homogeneous background tabula rasa, eliminates the bright spot that LED produces.
Claims (4)
1, a kind of background tabula rasa of liquid crystal display use, comprise background tabula rasa body (20), be combined in the circuit board (30) of this body bottom, be welded with a plurality of light emitting diodes (31) on the circuit board, around the background tabula rasa is lighttight framework (21), and constitutes the bias light district (22) of hollow at the middle section of this body; Translucent diaphragm is posted on the top layer of body, it is characterized in that: respectively be provided with reflecting wall (50) around the light emitting diode (31).
2, the background tabula rasa of a kind of liquid crystal display use according to claim 1 is characterized in that reflecting wall is an annular.
3, the background tabula rasa of a kind of liquid crystal display use according to claim 1 is characterized in that reflecting wall is cubic shaped as frame.
4, the background tabula rasa of a kind of liquid crystal display use according to claim 1 is characterized in that reflecting wall (50) is connected to each other to one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93217460 CN2161938Y (en) | 1993-07-06 | 1993-07-06 | Background light plate for liquid crystal indicator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93217460 CN2161938Y (en) | 1993-07-06 | 1993-07-06 | Background light plate for liquid crystal indicator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2161938Y true CN2161938Y (en) | 1994-04-13 |
Family
ID=33797385
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93217460 Expired - Fee Related CN2161938Y (en) | 1993-07-06 | 1993-07-06 | Background light plate for liquid crystal indicator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2161938Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7304697B2 (en) | 2003-06-24 | 2007-12-04 | Lg.Philips Lcd Co., Ltd. | Liquid crystal display device using light emitting diode |
-
1993
- 1993-07-06 CN CN 93217460 patent/CN2161938Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7304697B2 (en) | 2003-06-24 | 2007-12-04 | Lg.Philips Lcd Co., Ltd. | Liquid crystal display device using light emitting diode |
| CN1573474B (en) * | 2003-06-24 | 2010-04-07 | 乐金显示有限公司 | Liquid crystal display device using light emitting diode |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |