TWM526693U - Secondary optical lens with uniform and square light distribution - Google Patents

Description

Secondary optical lens with uniform and square light distribution

The requirement of the backlight module is a uniform light-emitting surface, and the use of a light-emitting diode (LED) needs to improve the light distribution of the lens.

The use of Light-Emitting Diodes (LEDs) in backlight modules has become more and more common. The most important factors are the brightness and uniformity of light, and the light distribution of LEDs is circular and the center point. The brightness will be the brightest, and the farther the distance is, the weaker. If multiple LEDs are arranged, the overlapping portions of the light distribution will overlap each other, so there is a problem that the light distribution is uneven.

The purpose of the new shape is to enable the backlight module to have a uniform light distribution, to solve the uneven distribution of the LED light, and to distribute the square light to have a uniform light distribution surface. The novel secondary optical lens of the uniform and square light distribution can be used in various forms of backlight modules, such as liquid crystal displays, televisions, electronic instrument panels, and the like.

1‧‧‧ square lens

11‧‧‧The surface above the freeform surface

111‧‧‧Square formed by four arcs

112‧‧‧ Tangent square

12‧‧‧ diagonal section of square lens

2‧‧‧Light source

3‧‧‧ circuit board

Figure 1 is a schematic diagram of a secondary optical lens with a uniform and square light distribution.

Figure 2 is a top plan view of a secondary optical lens with a uniform and square light distribution.

Figure 3 is the diagonal section of the secondary optical lens with uniform and square light distribution. schematic diagram

The above and other technical contents, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments. Before the present invention is described in detail, it is noted that in the following description, similar elements are denoted by the same reference numerals. Referring to FIG. 1 , in a first embodiment of the present invention, a secondary optical lens of a uniform and condensable square light distribution mainly comprises: a square lens 1 having a square structure with a free curved surface; and a light source 2 located at the lens and the circuit board. Between the two, the circuit board 3, the bottom layer enables the light source 2 to emit light; and the function of the light source 2 on the circuit board 3 can directly project a high-efficiency light beam of uniform square light distribution through the square lens 1 without shielding the periphery. A secondary lens with a uniform and square light distribution, the square lens comprising a free surface upper surface 11 and a square 111 formed by four arcs. A secondary lens with uniform square light distribution, the square lens consists of four arcs of square 111, and the tangent of the highest point of the four arcs constitutes a square 112, which may be a square or a rectangle, and its total side length and four arcs The difference in length is less than 1.7 times the shortest distance from the center to the side length. A secondary lens with a uniform and square light distribution, the shape of the diagonal section of the square lens 12 is surrounded by a concave and convex batwing free-form surface. The secondary lens of the uniform and square light distribution, the light source 2 can be any kind, such as a bulb, a light emitting diode (LED), and the like. A secondary lens of uniform and square light distribution, the circuit board 3 being a circuit of any form.

However, the above description is only a preferred embodiment of the present invention, and the scope of the present invention cannot be limited thereto, that is, the simple equivalent change and modification made by the novel patent application scope and the novel description content, All remain within the scope of this new patent.

1‧‧‧ square lens

2‧‧‧Light source

3‧‧‧ circuit board

Claims (6)

A secondary optical lens with uniform and square light distribution, comprising: a square lens having a square structure with a free curved surface and placed above the light source; a light source located between the lens and the circuit board; and a circuit board at the bottom layer enabling The light source emits light; its function can directly project a high-efficiency light beam with uniform square light distribution through the square lens without the need for peripheral light shielding through the square lens. According to the secondary optical lens of the uniform and condensable square light distribution according to claim 1, the square lens comprises a surface of the free curved surface and a square formed by four arcs. According to the secondary optical lens of the uniform and condensable square light distribution according to the first aspect of the patent application, the square lens is formed by four arcs, and the tangent of the highest point of the four arcs is square, which can be square or rectangular. The difference between the total side length and the four arc lengths is less than 1.7 times the shortest distance from the center to the side length. According to the secondary optical lens of the uniform and square-shaped light distribution according to the first aspect of the patent application, the diagonal cross-sectional shape of the square lens surrounds the concave convex batwing free-form surface. According to the secondary optical lens of the uniform and condensable square light distribution described in claim 1, the light source may be of any kind, such as a bulb, a light emitting diode (LED) or the like. According to the secondary optical lens of the uniform and condensable square light distribution described in claim 1, the circuit board is any form of circuit.