CN201004095Y - Light guiding plate and display device with the same - Google Patents
Light guiding plate and display device with the same Download PDFInfo
- Publication number
- CN201004095Y CN201004095Y CNU2007200021681U CN200720002168U CN201004095Y CN 201004095 Y CN201004095 Y CN 201004095Y CN U2007200021681 U CNU2007200021681 U CN U2007200021681U CN 200720002168 U CN200720002168 U CN 200720002168U CN 201004095 Y CN201004095 Y CN 201004095Y
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- CN
- China
- Prior art keywords
- guide plate
- light guide
- light
- entrance window
- salient point
- 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 - Lifetime
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Abstract
The utility model provides a light guide plate, which is characterized in that: the facade of the light guide plate is light emergent face; an entrance window is arranged at the middle of one end in the lengthwise direction; the back of the light guide plate is provided with a salient point of diffuse light; the rate that the salient point occupies the back area increases gradually from one end of the entrance window to the opposite end. By adopting the indicating device of the light guide plate in the utility model, the background illumination effect can be obtained that is equivalent to the bypast technology, and therefore reduce the production cost to large extent as well as simplify the design.
Description
Technical field
The utility model relates to a kind of light guide plate.In particular, relate to a kind of light guide plate that is used for the LCD Panel back lighting.
Background technology
In existing small-sized liquid crystal indicator, use light guide plate as shown in Figure 1 usually, this light guide plate 31 is arranged on the LCD screen rear, and on the both ends of light guide plate 31, is respectively arranged with 2 light-emitting components 32.Light guide plate as shown in Figure 1, has even salient point (diagram slightly) at its back side, reflect at bump surface to play the light that light-emitting component was sent that makes from two ends, and from the exit facet outgoing of this light guide plate, thereby see through the back lighting that LCD screen realizes LCD screen.
But aforesaid light guide plate need be provided with a plurality of light-emitting components respectively at these light guide plate two ends usually, to improve the brightness of back lighting.Therefore, cost is higher, and the wiring of the light-emitting component of having to consider together in Design of device.
The utility model content
The utility model provides a kind of light guide plate, and this light guide plate not only can only at one end be provided with 1 light-emitting component, and obtain with prior art as mentioned above in same brightness, and, because number of elements reduces, and can reduce production costs, and make Design of device more flexible.
The utility model provides a kind of light guide plate, and this light guide plate is the rectangle transparent panel, and its front is a light-emitting face; Middle part at an end of its length direction has entrance window; The a plurality of salient points that have scattered beam at the above-mentioned light guide plate back side; From having above-mentioned entrance window one end to an end relative with above-mentioned entrance window, the ratio that above-mentioned salient point accounts for above-mentioned backside area increases gradually.
According to light guide plate of the present utility model, owing to only be provided with 1 light-emitting component at the one end, when light is incident to light guide plate from entrance window, and in light guide plate when the other end transmits, pass through the scattering of above-mentioned salient point overleaf and change direction, and from the front of light guide plate, be that exit facet penetrates, but, when light arrives the other end, because through the scattering of salient point and the loss of in light guide plate, transmitting before, and become very faint, therefore, can improve the reflection of light amount, make after light is delivered to the other end and can also obtain higher outgoing brightness by improving the ratio that above-mentioned salient point occupies backside area.
As mentioned above, the ratio that the change salient point occupies backside area can have several different methods, for example, increases the density of salient point under the situation of the area that does not change each salient point, perhaps, increases the area of salient point self under the situation that does not change the spacing between the salient point.But according to above-mentioned light guide plate of the present utility model, preferably from having above-mentioned entrance window one end to an end relative with above-mentioned entrance window, the area of above-mentioned salient point increases gradually.
In addition, according to light guide plate of the present utility model,, have and form zigzag light reflection surface also at an end relative with above-mentioned entrance window.Thus, after light arrives the other end from the entrance window end, be arranged at repeatedly total reflection takes place on the sawtooth pattern surface of emission of the other end after, turn back in the light guide plate once more, and reflect being arranged on the salient point at the back side, can improve the utilization factor of incident ray, thereby improve the brightness of emergent light.And, also preferably, have the bight reflecting surface in two bights of the light guide plate of above-mentioned entrance window one end.Owing to is the minimum position of irradiate light in two bights of entrance window end, therefore, by the bight reflecting surface is set on this position, can with the light that reflects from the sawtooth pattern reflecting surface in this bight secondary reflection again, thereby improve this bight reflected light brightness.In addition, also preferred at the back side of described light guide plate, be formed on the described salient point on the near zone of described bight reflecting surface, to compare with other the described salient points on being formed on the described light guide plate back side, area is bigger.And, on the near zone of described bight reflecting surface, and form the regional corresponding of described scattering salient point preferably at the exit facet of described light guide plate, be formed with dermatoglyph.Utilize this dermatoglyph, can further improve near the scattered light intensity the bight, thereby improve near the backlight illumination this.
In addition, the utility model also provides a kind of display device with above-mentioned light guide plate, and this light guide plate is arranged on the rear of display panel, and on an end entrance window position of this light guide plate light-emitting component is set.
Utilize light guide plate as mentioned above, can be only a light-emitting component be set, and reach and in the past the suitable emergent light brightness of light guide plate, therefore, can reduce the production cost of device, and make the device design more convenient at an end of light guide plate.
Description of drawings
Fig. 1 is the structural representation of light guide plate in the past.
Fig. 2 is the brief configuration synoptic diagram of light guide plate of the present utility model.
Fig. 3 is that the back side salient point of light guide plate of the present utility model forms view.
Fig. 4 is the entrance window end structure synoptic diagram at the light guide plate of the present utility model back side.
Fig. 5 is the entrance window end structure synoptic diagram of light guide plate exit facet of the present utility model.
Fig. 6 is the structural drawing of display device of the present utility model.
Embodiment
Below, the embodiment to light guide plate of the present utility model is described in further detail in conjunction with the accompanying drawings.
At first, as Fig. 2, shown in Figure 3, be respectively the brief configuration synoptic diagram of light guide plate of the present utility model and the back side salient point of light guide plate of the present utility model and form view.The middle position of one end of light guide plate 1 is provided with entrance window 15, and the back side is provided with and is used for catoptrical salient point 11, this salient point can utilize with in the past light guide plate in the identical structure of employed salient point.But, be different from conventional art, in the light guide plate 1 of present embodiment, to an end relative with entrance window 15, the ratio of salient point 11 shared backside area increases gradually from a end with entrance window 15.Therefore, even 1 light-emitting component only at one end is set, also can on distance entrance window one end part far away, obtain bigger emergent light brightness.Thereby, can reduce the manufacturing cost of whole device, and simplify Design of device.As shown in Figure 2, in the light guide plate 1 of present embodiment,, the area of above-mentioned each salient point 11 is increased gradually from the entrance window end to the other end relative with this entrance window.
In addition, as shown in Figure 2, also be provided with zigzag light reflection surface 12 at an end relative with entrance window 15, owing to be provided with this light reflection surface, stop the light that from the light of entrance window 15 incidents, is not scattered to bring out and penetrate, and reflect back in the light guide plate once more from this through whole light guide plate, carry out further scattering by the salient point that is arranged on the back side once more, improved the utilization factor of light, thereby increased the brightness of emergent light, locational emergent light brightness especially far away apart from the incident end.
As Fig. 2 and shown in Figure 4, also be provided with bight reflecting surface 13 in two bights of entrance window 15 1 ends, this bight reflecting surface 13 of present embodiment is to form by the reflection configuration that runs through this position is set in the bight, this bight reflecting surface 13 can reflect by above-mentioned sawtooth pattern reflecting surface 12 and reflect light, and, owing to be difficult to make light to reach the bight of these entrance window 15 1 ends, therefore, by said structure is set, light volume reflection on corner positions is increased, thereby improve this part brightness.
And, as shown in Figure 4, can also make near the salient point 14 that is formed on above-mentioned bight reflecting surface 13, to compare with other salient points 11 on the back side that is formed on light guide plate 1, area is bigger.Like this, can further improve the scattered beam intensity on folding corner region, thereby improve the brightness on the folding corner region.
In addition, when adopting the as above light guide plate of structure, still can not obtain in the bight of incident end under the situation of enough brightness, can also be as shown in Figure 5, on exit facet, the zone relative with forming scattering salient point 14, form dermatoglyph 16, this dermatoglyph 16 forms by polishing, can be to the further scattering of light of 14 scatterings of scattering salient point at the back side, thus brightness on the incident vertex angle part zone further improved.
In addition,, can also provide a kind of display device according to the utility model,
Utilize light guide plate of the present utility model, can make this display device as shown in Figure 6, have display device, reflective sheeting 23 and the light-emitting component 24 of light guide plate 22, display panel 21 as mentioned above.Light guide plate 22 is arranged on the rear of above-mentioned display panel 21, and on the position of the entrance window of light guide plate 22, light-emitting component 24 is set.In this display device,,, therefore can obtain the back lighting brightness suitable with the display device of prior art owing to adopted light guide plate 22 of the present utility model though only used 1 light-emitting component.And, owing to reduced the usage quantity of light-emitting component significantly, can effectively reduce cost, and make the design of display device obtain simplifying.
As mentioned above can, light guide plate utilization of the present utility model can reach the reflected light brightness suitable with it than conventional art light-emitting component (being 1 in the present embodiment) still less, therefore utilize the display device of light guide plate of the present utility model can obtain the background illumination effects suitable with conventional art, and reduce manufacturing cost significantly, and simplified design.
Claims (7)
1. light guide plate is characterized in that:
The front of described light guide plate is a light-emitting face;
End at the length direction of described light guide plate has the entrance window that makes light incident;
The a plurality of salient points that have scattered beam at the described light guide plate back side;
From having described entrance window one end to an end relative with described entrance window, the ratio that described salient point accounts for described backside area increases gradually.
2. light guide plate as claimed in claim 1 is characterized in that:
From having described entrance window one end to an end relative with described entrance window, the area of described salient point increases gradually.
3. light guide plate as claimed in claim 1 is characterized in that:
At an end relative, have and form zigzag light reflection surface with described entrance window.
4. light guide plate as claimed in claim 3 is characterized in that:
Two bights in the described light guide plate that is provided with described entrance window one end have the bight reflecting surface.
5. light guide plate as claimed in claim 3 is characterized in that:
At the back side of described light guide plate, be formed on the described salient point on the near zone of described bight reflecting surface, to compare with other the described salient points on being formed on the described light guide plate back side, area is bigger.
6. light guide plate as claimed in claim 5 is characterized in that:
At the exit facet of described light guide plate, on the near zone of described bight reflecting surface, and form the regional corresponding of described scattering salient point, be formed with dermatoglyph.
7. display device is characterized in that: have display panel and be arranged on described display panel rear as any one described light guide plate in the claim 1～6, and described light guide plate entrance window position is provided with light-emitting component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200021681U CN201004095Y (en) | 2007-01-31 | 2007-01-31 | Light guiding plate and display device with the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200021681U CN201004095Y (en) | 2007-01-31 | 2007-01-31 | Light guiding plate and display device with the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201004095Y true CN201004095Y (en) | 2008-01-09 |
Family
ID=39039637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200021681U Expired - Lifetime CN201004095Y (en) | 2007-01-31 | 2007-01-31 | Light guiding plate and display device with the same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201004095Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102472453A (en) * | 2009-07-30 | 2012-05-23 | 夏普株式会社 | Edge-light-type illuminating device, liquid crystal display device, and television receiver |
| US8591090B2 (en) | 2010-02-06 | 2013-11-26 | Hon Hai Precision Industry Co., Ltd. | Backlight module and light guide plate thereof |
-
2007
- 2007-01-31 CN CNU2007200021681U patent/CN201004095Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102472453A (en) * | 2009-07-30 | 2012-05-23 | 夏普株式会社 | Edge-light-type illuminating device, liquid crystal display device, and television receiver |
| US8591090B2 (en) | 2010-02-06 | 2013-11-26 | Hon Hai Precision Industry Co., Ltd. | Backlight module and light guide plate thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080109 |