A led secondary cylindrical lens for direct backlight source
A secondary cylinder and backlight light source technology, applied in the field of LED backlight advertising boards and backlight sources, can solve the problems of high assembly cost, light intensity reduction, dark spots, etc., and achieve simple structure, high light uniformity, and energy saving Effect
Inactive Publication Date: 2016-01-20
HANGZHOU AUTOON ENVIRONMENTAL TECH CORP
View PDF8 Cites 2 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The lens of this solution diffuses the LED light energy along the 360-degree direction, so the reduction in light intensity is relatively large, especially when the diffusion ratio is large (the diffusion ratio is the ratio of the light source spacing to the light mixing height); at the same time, this kind of lens generally produces Circular light spot, in the case of LED array arrangement, it is easy to form dark spots. In addition, a lens must be installed on each LED, and the assembly accuracy requirements make this backlight solution have a higher assembly cost.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0023] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in combination with specific implementation cases and with reference to the accompanying drawings.
[0024] The LED secondary cylindrical lens (cylindrical lens for short, the same below) of the present invention is an axisymmetric entity made of transparent material, and the LED secondary cylindrical lens includes an incident surface 1 (ie, a light receiving surface), a reflecting surface 2 And the exit surface 3 (ie, the light exit surface), the incident surface 1 for receiving light is located at the lower part (center) of the LED secondary cylindrical lens and is a curved surface, the LED light source 4 is installed under the incident surface 1, and the reflective surface 2 is located on the LED The bottom surface of the secondary cylindrical lens is flat and used to reflect the light reflected from the upper...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses an LED quadratic cylindrical lens for a direct type backlight source. The LED quadratic cylindrical lens is characterized in that the LED quadratic cylindrical lens is an axially symmetrical substance made of transparent materials, and comprises an incident surface, a reflecting surface and an emergent surface; the incident surface is positioned on the lower portion of the LED quadratic cylindrical lens and is a curved surface, the reflecting surface is positioned at the bottom of the LED quadratic cylindrical lens, and the emergent surface is a curved surface; and a contour line of each of the incident surface and the emergent surface along a normal direction of a cylindrical surface can be represented by a formula, a z in the formula represents the height of each contour line, and an r in the formula represents the distance from each contour line to the axis of the LED quadratic cylindrical lens. The LED quadratic cylindrical lens has the advantages that the LED quadratic cylindrical lens is simple in structure and assembly, the light uniformity of a product is high as compared with a like product under the condition of identical diffusion ratio, and energy is saved.
Description
technical field [0001] The invention relates to an LED secondary cylindrical lens for a direct-type backlight source, and is mainly suitable for the backlight source of the direct-type backlight source, or an LED backlight advertising board. Background technique [0002] Backlight sources are widely used in traditional liquid crystal displays (LCD) and large advertising boards. The traditional cold cathode tube (CCFL) backlight has been gradually replaced by light emitting diode (LED) backlight. The initial backlight is realized by a light guide plate with engraving on the back, and the light source (CCFL for line light source or LED for point light source) introduces light from the side of the light guide plate. Due to the limitation of light guide plate technology, this method is not efficient. The direct-type liquid crystal display backlight effectively improves the lighting efficiency problem. Since LED is a point light source with limited beam angle, when it is used i...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): F21V5/04F21Y101/02F21Y115/10
Inventor 郑睿韬郑睿敏
Owner HANGZHOU AUTOON ENVIRONMENTAL TECH CORP