High-flatness light source

Abstract

The utility model discloses a high-flatness light source which comprises a glass substrate plated with ITO (indium tin oxide), a light-emitting chip and a reflecting cover, the ITO-plated glass substrate comprises a glass substrate body, the lower surface of the glass substrate body is a light emitting face, and a first conducting film circuit and a second conducting film circuit are formed on the upper surface of the glass substrate body through ITO plating. The ITO-plated glass substrate has the advantages of being conductive, high in transparency, free of a metal support and capable of evenly blocking light in a small amount, meanwhile, the characteristic that the glass substrate is high in planeness is utilized, the light source with the high-planeness light-emitting face is manufactured, the number of molds used for manufacturing is small, the requirement is low, cost is greatly saved, and production efficiency is improved. The requirement for high flatness can be met more easily, the product yield is effectively improved, convenience is brought to production and manufacturing, and meanwhile the same glass in the product is balanced in stress, small in deformation, durable and better in use performance.

Description

Technical Field

[0001] The utility model relates to the technology of light source field, in particular to a high-planarity light source. Background Art

[0002] The invention of electric light sources has promoted the construction of power devices. Electric light sources have high conversion efficiency, stable power supply, convenient control and use, safety and reliability, and can be easily counted by instruments and meters. Therefore, they have quickly become popular in the more than 100 years since their advent. The research, development and promotion of energy-saving electric light sources have attracted great attention. A uniform plane light source refers to a light source with a uniform luminous intensity in a plane geometric shape. In special occasions of daily application, the light source is often required to have the characteristics of a uniform plane. For example, the backlighting of liquid crystal displays and the backlight used in measuring instruments require the use of a plane light source with very high uniformity.

[0003] The grating ruler light source needs to have good parallel characteristics in order to have good moiré fringes and projection imaging on the Fresnel focal plane. The displacement distance can be calculated based on the number of times and amount of intersection of this projection image with another grating image.

[0004] At present, most of them adopt the lens method, and there are many methods of lens method: one of them is to use a lens to parallelize the light generated by the light source. The advantages of this method are: good light source characteristics; the disadvantages are: difficult process, high cost, large volume, long optical path, dispersion, and spherical aberration. Therefore, another method is to use a reflective method, which is similar to the reverse of a reflective telescope. The advantages of this method are: small volume and easy to make; the disadvantages are: because there is a metal bracket on it, the metal bracket itself is not transparent, which will block part of the light and lose part of the light energy when used. This area needs to be avoided during design. At the same time, due to the high requirements for the flatness of the light-emitting surface, the mold used for production needs to meet the following requirements at the same time: (1) the optical curvature requirements of the aspheric reflective surface; (2) the light-emitting surface is flat and perpendicular to the direction of the light; therefore, the mold requirements are high, the injection molding machine requirements are also high, and the cost is high. Utility Model Content

[0005] In view of this, the utility model aims to solve the deficiencies in the prior art, and its main purpose is to provide a high-planarity light source, which can effectively solve the problems of partial light blocking, high mold manufacturing cost and low yield in the existing light source used for grating rulers.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A high-planarity light source comprises an ITO-coated glass substrate, a light-emitting chip and a reflector; the ITO-coated glass substrate comprises a glass substrate, the lower surface of the glass substrate is a light-emitting surface, the upper surface of the glass substrate is formed with a first conductive film circuit and a second conductive film circuit by ITO coating, the first conductive film circuit has a first welding part and a first connecting part, and the second conductive film circuit has a second welding part and a second connecting part; the light-emitting chip is welded and connected between the first welding part and the second welding part; the reflector is formed and fixed on the upper surface of the glass substrate and covers the light-emitting chip.

[0008] As a preferred solution, the glass substrate is electronic grade glass with higher flatness.

[0009] As a preferred solution, the first welding portion and the second welding portion are both in the shape of slender strips, and the first welding portion and the second welding portion are arranged and extended laterally to minimize the shielding of light by the first welding portion and the second welding portion.

[0010] As a preferred solution, the first connection portion and the second connection portion are both in the shape of wide long strips, are respectively located outside of two sides of the reflector, and extend longitudinally to facilitate connection with the circuit.

[0011] As a preferred solution, the first connecting portion is connected to a first FPC lead, the second connecting portion is connected to a second FPC lead, and the first FPC lead and the second FPC lead are used to conduct and connect with an external circuit, which has a simple structure and is easy to install and connect.

[0012] As a preferred solution, one end of the light emitting chip is welded to the tail end of the first welding part, and the other end of the light emitting chip is welded to the tail end of the second welding part through a gold wire, which has a simple structure and is easy to install and connect.

[0013] As a preferred solution, the reflector includes an aspheric lens, which is molded and fixed on the upper surface of the glass substrate and covers the light-emitting chip. The outer surface of the aspheric lens is coated with a reflective film, which completely covers the outer surface of the aspheric lens. It has a simple structure, is easy to mold, and has low cost.

[0014] Compared with the prior art, the utility model has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical solution that:

[0015] By adopting an ITO-coated glass substrate, which is conductive and highly transparent, and has no metal bracket, it only causes a small amount of uniform obstruction to the light. At the same time, the glass substrate has the characteristic of high flatness, so a light source with a high-flatness light-emitting surface is obtained. The number of molds used in the production is small, and the requirements are low, which greatly saves costs and makes it easier to meet the requirements of high flatness, effectively improving the product yield and bringing convenience to production. At the same time, the same glass in this product has balanced stress, small deformation, durability, and better product performance.

[0016] In order to more clearly illustrate the structural features and functions of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a cross-sectional schematic diagram of a preferred embodiment of the utility model;

[0018] Figure 2 It is a top view of a preferred embodiment of the utility model;

[0019] Figure 3 It is a cross-sectional schematic diagram of the preferred embodiment of the utility model in use.

[0020] Description of the accompanying drawings:

[0021] 10. ITO-coated glass substrate 11. Glass substrate

[0022] 12. First conductive film circuit 121, first welding portion

[0023] 122, first connecting portion 13, second conductive film circuit

[0024] 131. Second welding portion 132. Second connecting portion

[0025] 101, light emitting surface 20, light emitting chip

[0026] 30. Reflector 31. Aspherical lens

[0027] 32. Reflective film 41. First FPC lead

[0028] 42. Second FPC lead 43. Gold wire

[0029] 50. Circuit board 51. Light-transmitting hole. DETAILED DESCRIPTION

[0030] Please refer to Figures 1 to 3 As shown, it shows the specific structure of a preferred embodiment of the utility model, including an ITO-coated glass substrate 10, a light-emitting chip 20 and a reflector 30.

[0031] The ITO-plated glass substrate 10 includes a glass substrate 11, the lower surface of the glass substrate 11 is a light-emitting surface 101, and the upper surface of the glass substrate 11 is formed with a first conductive film circuit 12 and a second conductive film circuit 13 by plating ITO, the first conductive film circuit 12 has a first welding portion 121 and a first connecting portion 122, and the second conductive film circuit 13 has a second welding portion 131 and a second connecting portion 132. In this embodiment, the glass substrate 11 is electronic grade glass with higher flatness. The first welding portion 121 and the second welding portion 131 are both slender strips, and the first welding portion 121 and the second welding portion 131 are arranged horizontally and extend horizontally to minimize the shielding of light by the first welding portion 121 and the second welding portion 131. The first connection part 122 and the second connection part 132 are both in the shape of wide strips. The first connection part 122 and the second connection part 132 are respectively located outside the two sides of the reflector 30. The first connection part 122 and the second connection part 132 are both extended longitudinally to facilitate connection with the circuit. In addition, the first connection part 122 is connected to the first FPC lead 41, and the second connection part 132 is connected to the second FPC lead 42. The first FPC lead 41 and the second FPC lead 42 are used to conduct and connect with the external circuit, so the structure is simple and the installation and connection are convenient.

[0032] The light emitting chip 20 is welded and connected between the first welding part 121 and the second welding part 131. In this embodiment, one end of the light emitting chip 20 is welded against the tail end of the first welding part 121, and the other end of the light emitting chip 20 is welded to the tail end of the second welding part 131 through a gold wire 43. The structure is simple and the installation and connection are easy. The light emitting chip 20 is a light emitting diode, a laser diode or other electroluminescent element, but is not limited thereto.

[0033] The reflector 30 is molded and fixed on the upper surface of the glass substrate 11 and covers the light emitting chip 20. In this embodiment, the reflector 30 includes an aspheric lens 31, which is molded and fixed on the upper surface of the glass substrate 11 and covers the light emitting chip 20. The outer surface of the aspheric lens 31 is plated with a reflective film 32, and the reflective film 32 completely covers the outer surface of the aspheric lens 31, which has a simple structure, is easy to mold, and has a low cost.

[0034] The production process of this embodiment is described in detail as follows:

[0035] During the production, first, the glass is coated and cut through the ITO process to obtain the ITO-coated glass substrate 10, then, the light-emitting chip 20 is solidified and wire-bonded on the ITO-coated glass substrate 10, so that the light-emitting chip 20 is welded and connected between the first welding part 121 and the second welding part 131, and then, the aspheric lens 31 is molded on the upper surface of the ITO-coated glass substrate 10, and then, the outer surface of the aspheric lens 31 is coated to form a reflective film 32, and finally, the first FPC lead 41 is connected to the first connecting part 122, and the second FPC lead 42 is connected to the second connecting part 132.

[0036] When using, Figure 3 As shown, the product is fixed on the surface of an external circuit board 50, a light-transmitting hole 51 is opened on the circuit board 50, and the first FPC lead 41 and the second FPC lead 42 are connected to an external power source. After power is turned on, the light-emitting chip 20 emits light, and the light is reflected by the reflector 30 and then emitted from the light-emitting surface 101. The light is very uniform, and then the light is emitted from the light-transmitting hole 51.

[0037] The design focus of the utility model is: by adopting an ITO-plated glass substrate, which has the characteristics of being conductive and highly transparent, without a metal bracket, only a small amount of and uniform obstruction to light is caused, and at the same time, the glass substrate has the characteristic of high flatness, so a light source with a high-flatness light-emitting surface is obtained, and the number of molds used in production is small and the requirements are low, which greatly saves costs, and it is easier to meet the requirements of high flatness, effectively improving the product yield, and bringing convenience to production. At the same time, the same glass in this product has balanced stress, small deformation, durability, and better product performance.

[0038] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A high-planarity light source, characterized in that: The invention comprises an ITO-plated glass substrate, a light-emitting chip and a reflector; the ITO-plated glass substrate comprises a glass substrate, the lower surface of the glass substrate is a light-emitting surface, the upper surface of the glass substrate is formed with a first conductive film circuit and a second conductive film circuit by ITO plating, the first conductive film circuit has a first welding part and a first connecting part, the second conductive film circuit has a second welding part and a second connecting part; the light-emitting chip is welded and connected between the first welding part and the second welding part; the reflector is formed and fixed on the upper surface of the glass substrate and covers the light-emitting chip.

2. The high-planarity light source according to claim 1, characterized in that: The glass substrate is electronic grade glass.

3. The high-planarity light source according to claim 1, characterized in that: The first welding portion and the second welding portion are both in the shape of slender strips, and the first welding portion and the second welding portion are arranged transversely and extend transversely.

4. The high-planarity light source according to claim 1, characterized in that: The first connection portion and the second connection portion are both in the shape of wide long strips. The first connection portion and the second connection portion are respectively located outside the two sides of the reflector, and the first connection portion and the second connection portion are both extended longitudinally.

5. The high-planarity light source according to claim 1, characterized in that: The first connecting portion is connected to a first FPC lead, and the second connecting portion is connected to a second FPC lead.

6. The high-planarity light source according to claim 1, characterized in that: One end of the light emitting chip is welded against the tail end of the first welding portion, and the other end of the light emitting chip is welded to the tail end of the second welding portion through a gold wire.

7. The high-planarity light source according to claim 1, characterized in that: The reflector includes an aspheric lens, which is molded and fixed on the upper surface of the glass substrate and covers the light-emitting chip. The outer surface of the aspheric lens is plated with a reflective film, which completely covers the outer surface of the aspheric lens.

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