JP3101220U - Light guide plate of the type that resists light - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the uniformity of a light guide plate of a type against light.
The present invention provides a light guide plate of a type opposing a light beam applied to a backlight module provided with at least one light emitting diode, and the light guide plate of the type opposing the light beam has at least one reflection plate. and area, and a reflecting surface provided in the reflective area, and a light guiding portion which is connected to the reflective area, is utilized to form a display area, among which, prior SL-emitting member is a rear surface of the display area located in part and facing the reflecting surface, the reflecting surface of the front Symbol reflection area reflects the emitted light of the light emitting member, and transmits the beam to beam delivery unit, and predetermined on the light guide portion The display areas of different formats are formed according to the needs of the above.
[Selection diagram] FIG.

Description

This invention relates to a light guide plate of the type against the light, in particular to the type of light guide plate against the light having a high degree of uniformity.

  Now, with the development of consumer electronics products, the application range of backlight modules has been further expanded, for example, indicators and buttons of mobile phones, portable computers and personal digital assistants, touch pads and pointing devices. Provide illumination light in fields such as sticks.

  FIG. 1 shows a conventional light guide plate 1a, which is applied to a backlight module having a light emitting diode (LED) 5a, in which the light emitting diode 5a faces a display area 6a. The light emitting diode 5a, which is adjacent to a certain edge of the plate 10a of FIG. 1a, has a different light emitting angle α because the design and manufacturing process of the light emitting diode 5a are different from each other. Is formed between the first light guide path 51a and the second light guide path 52a at the widest limit of the light beam that can be emitted by the light emitting diode 5a. Since a dark zone d in which no ray can be displayed is formed on both symmetric sides of 5a, the ray plan is made. It can not be improved uniformity of the plate 1a.

SUMMARY OF THE INVENTION An object of the present invention is to provide a beam guide plate of a type that is capable of improving the uniformity according to a predetermined need, and is of a type that is opposed to light beams.

In order to achieve the above object, the present invention provides a light guide plate of the type applied to a backlight module provided with at least one light emitting diode, and a light guide of the type opposed to the light beam. the plate, at least one reflective area, and a reflecting surface provided in the reflective area, and a light guiding portion which is connected to the reflective area, is utilized to form a display area, therein, before Symbol located in the light emitting member is the rear portion of the display area, and facing the reflecting surface, the reflecting surface of the front Symbol reflection area reflects the emitted light of the light emitting member, and transmits the beam to beam delivery unit In addition, by forming the display areas of different types in the light guide unit according to predetermined needs, the uniformity of the light guide plate of the type against the light rays is improved.

  Hereinafter, in order to elucidate the technology and features of the present invention in more detail, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It goes without saying that a simple structure does not limit the present invention.

As shown in FIGS. 2 (A) and 2 (B), the present invention provides a light guide plate 1 of a type that resists a kind of light, which is provided with at least one light emitting member 5. The light guide plate 1 of the type that opposes the light beam includes at least one reflection area 2, a reflection surface 3 wrapped by the reflection area 2, and a light guide portion having a predetermined shape connected to the reflection area 2. 4 to form the display area 6. Among them, the reflection area 2 includes at least one reflection surface 21 and a transmission surface 22 connected to the reflection surface 21, and the light emitted from the light emitting member 5 passes through the reflection area 2 to the light guide 4. The light is reflected to form the display area 6, in which the reflection surface 21 is formed in an arc shape, or is formed in a parabolic shape that reflects the light rays so as to be parallel light, or the reflection surface 21 is formed in a flat shape. are formed on, the reflecting surface 21 is paired, it is sandwiched at a predetermined angle is and articulated, among which, the light emission member 5 is housed in the reflection area 2.

The light-emitting member 5 is a point light source, and the emitted light beam is non-parallel light having an emission angle, and the emission angle is set to be different according to the degree of the design and manufacturing process of each maker, and A light emitting diode (LED, Light Emitting Device) is adopted as the light emitting member 5, and generally, the light emitting angle of the light emitting diode is in the range of 70 to 120 degrees. Therefore, in the present invention, the reflection surface 21 has different predetermined angles. The light-emitting member 5 has different reflection abilities, and is used to enlarge the angle at which the light-emitting member 5 reflects light emitted by the light-emitting member 5. By limiting the angle, it is not necessary to limit the light guide 4 to only a certain area, and furthermore, the light guide 4 It can be improved uniformity. Light guide portion 4 is connected to the transmission surface 22 of the reflection area 2, within its located to the rear portion of the light emitting member 5 is the display area 6, and faces the reflecting face 21, is and housed reflection area 2 You. As a result, the reflection surface 21 of the reflection area 2 reflects the light emitted from the light emitting member 5, and the light is transmitted to the light guide 4 through the transmission surface 22. The reflection surface 3 covers the reflection area 2 so that the light can be transmitted only to the light guide 4 through the transmission surface 22, so that the consumption of the light can be reduced. In addition, the light guides 4 are connected to the transmission surface 22 with different predetermined shapes, so that different types of display areas 6 can be formed on the light guide plate 1 of the type that opposes the light.

The present invention has a high uniformity by forming the light emitting member 5 on the back of the display area 6 and arranging the reflection surface 21 to reflect the light and transmit the light to the light guide 4. A light guide plate 1 of a type that opposes the light beam is formed.

The light guide 4 is formed on a frame, which can be formed in a rectangular, triangular or circular shape according to needs. As shown in FIG. 2A, when the light guide 4 is formed, for example, in a rectangular shape, the reflection surface 3 is wrapped in the bottom surface of the light guide 4, or the outer frame of the light guide 4 is further provided. Or further wrapped around the side surface of the inner frame of the light guide 4, so that the display area 6 becomes a rectangular illumination area along the light guide 4, in which the light emitting member 5 emits light. Is transmitted along the first ray guide path 51 and the second ray guide path 52, and the rays of the first ray guide path 51 are emitted from the light emitting member 5 and once reflected by the reflection surface 21, The light is transmitted into the light guide 4 through the transmission surface 22, and two reflection surfaces 41 are formed at two opposite ends of the light guide 4 on the side opposite to the light emitting member 5, thereby forming the first light guide. Reflect the light rays along the path 51. The light ray of the second ray guide path 52 is emitted from the light emitting member 5, is reflected twice by the reflection surface 21, and is transmitted through the transmission surface 22 to the same side as the light emission member 5 where the light guide member 4 is located. Therefore, the light is uniformly distributed in the light guide unit 4 by the transmission of the first light guide path 51 and the second light guide path 52.

As shown in FIG. 3A, the reflection area 2 is composed of a transmission surface 22. pair of reflective surfaces 21, the light emitting of the light emission member 5 along the third light guide path 53, the reflection surface 21 therein The reflected light is transmitted to the transmission surface 22 or the light emitted by the light emitting member 5 is reflected along the fourth ray guide path 54 to the reflection surface 21 therein and to another reflection surface 21, and further reflected. Then, the light is transmitted to the transmission surface 22. Therefore, the reflecting surface 21 can surely exhibit the function of distributing and transmitting the light beam to the light guide unit 4, and can sandwich the predetermined angle according to predetermined needs, adjust the light dispersion transmission path, and Can satisfy the predetermined needs.

As shown in FIG. 3B, the reflection area 2 is composed of two pairs of reflection surfaces 21 and transmission surfaces 22, and the two pairs of reflection surfaces 21 are connected so as to be symmetrical via the concave valley 211. The light emitting member 5 emits the light beam facing the concave valley 211, and the light beam forms a larger incident angle due to the close arrangement of the concave valley 211, so that the light beam is transmitted to the light beam guide 4. The longer the distance of the concave valley 211, the wider the dispersion range of the light beam.

As shown in FIG. 3C, the smaller the predetermined angle of the reflection surface 21 is, the larger the dispersion ratio of the light beam transmitted to the light guide unit is, and therefore, as described above, the present invention is applied. Can adjust the distribution range of the light beam transmitted to the light guide unit 4 by the predetermined angle to be sandwiched by the reflection surface 21 and the arrangement distance of the concave valley 211. The uniformity of the light guide plate 1 can be realized.

After as shown in FIG. 3D, the reflective surface 21 is formed in a parabolic, the light emitting member 5 is arranged at the focal point of the parabola, the emitted light of the light emitting element 5 is reflected on the reflecting surface 21 by its parallel Is transmitted to the inside of the light guide 4.

As shown in FIG. 3E, the reflection surface 21 is formed in a pair of arc shapes, and the path of the light beam transmitted to the light guide unit 4 can be adjusted by adjusting the curvature of the arc shape.

As shown in FIG. 4, the light guide 4 is formed in a circular shape, the light emitting member 5 is located at the back of the light guide 4, is housed in the reflection area 2, and the reflection surface 21 is By reflecting the emitted light beam, the light beam is moved along a predetermined shape of the light guide unit 11, and the light beam is transmitted along the fifth light guide path 55 and the sixth light guide path 56, whereby The need for high uniformity of the opposing type light guide plate 1 is satisfied.

As shown in FIG. 5, the light guide 4 is formed in a rectangular plate shape, and two reflection areas 2 are connected on both sides facing each other. And is accommodated in the reflection area 2, and the reflection surface 21 reflects the light emitted by the light emitting member 5, and transmits the light along the seventh ray guide path 57 and the eighth ray guide path 58. The need for high uniformity of the light guide plate 1 of the type that opposes the light beam by transmitting it to the guide portion 4 is satisfied.

The present invention reflects the light beam by arranging the light emitting member 5 on the back of the display area 6 and arranging the reflection surface 21 and has high uniformity by transmitting the light beam to the light guide unit 4. A light guide plate that resists light is realized.

As described above, the light guide plate 1 of the present invention, which opposes the light beam, can provide illumination of the display area in a specific area, and can be applied to products requiring identification, instructions, etc. It has applications not only for electronic products but also for diversification.

  As described above, the present invention can certainly achieve the predetermined purpose and effect, however, the specific technical means listed above are merely practicable embodiments of the present invention, and any of the present invention All modifications and changes made based on the gist and characteristics fall within the claimed scope of the present invention.

It is explanatory drawing which shows the conventional light guide plate. (A) is a front view showing a light guide plate of the present invention which opposes light rays, and (B) is a side view showing a light guide plate of the present invention which opposes light rays. It is an explanatory view showing a first embodiment of a reflection area of the present invention. FIG. 5 is an explanatory view showing a second embodiment of the reflection area of the present invention. It is an explanatory view showing a third embodiment of the reflection area of the present invention. It is an explanatory view showing a fourth embodiment of the reflection area of the present invention. It is an explanatory view showing a fifth embodiment of the reflection area of the present invention. FIG. 4 is an explanatory view showing an embodiment of the light guide unit of the present invention. FIG. 7 is an explanatory view showing another embodiment of the light guide unit of the present invention.

Explanation of reference numerals

DESCRIPTION OF THE REFERENCE NUMERALS 1 A light guide plate of the present invention that opposes light rays 2 Reflecting area 3 Reflecting surface 4 Light guiding section 5 Light emitting member 6 Display area 21 Reflecting surface 22 Transmitting surface 41 Reflecting surface 51 First ray guiding path 52 Second ray guiding path 53 Third ray guide path 54 Fourth ray guide path 55 Fifth ray guide path 56 Sixth ray guide path 57 Seventh ray guide path 58 Eighth ray guide path 211 Recessed valley

Claims (7)

In a light guide thin plate of a type opposed to a light beam applied to a backlight module provided with at least one light emitting member,
At least one reflection area comprising at least one reflection slope, a transmission surface adjacent to the reflection slope, and at least one storage tank formed to be recessed in the transmission surface,
A reflection member wrapped in the reflection area,
A light guide portion having a predetermined shape, which is connected to the transmission surface of the reflection area, is used to form a display area, and has a thickness set to be 2 mm or less.
The light-emitting member is located at the back of the display area, faces the reflection slope, and is stored in the storage tank.   The light guide thin plate of claim 1, wherein a light emitting diode is used as the light emitting member.   2. The light guide thin plate of claim 1, wherein the reflection slope is formed in an arc shape or a straight shape.   4. The light guide thin plate of claim 3, wherein the reflection slopes are paired and connected two by two.   The light guide thin plate of claim 1, wherein the light guide is formed in a frame shape or a flat shape.   When the light guide is formed in the shape of a frame, the number of reflection areas is one, and the light guide is connected to the light guide, and the shape of the frame is two opposing sides of the reflection area. 6. The method according to claim 5, wherein two reflection surfaces are formed at each of the ends to be recessed, and the amount of light reflected by the reflection surface is adjusted by changing the depth of the recesses. A light guide thin plate of the type that opposes the described light beam.   When the light guide portion is formed in a flat plate shape, the reflection slope is formed in a parabolic shape, and the storage tank is located at the focal point of the parabola, thereby transmitting light rays to the flat plate light guide portion in parallel. A light guide thin plate of the type against light rays according to claim 6, characterized in that:

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