Improved structure of proximity sensor

Abstract

The invention discloses an improved structure of a proximity sensor. The improved structure is composed of a substrate, a transmitting unit, a receiving unit, a packaging unit and a shielding unit. The substrate has a transmitting terminal region and a receiving terminal region. The transmitting unit is arranged in the transmitting terminal region; and the receiving unit is arranged in the receiving terminal region. The packaging unit consists of a first packaging body for covering the transmitting unit and a second packaging body for covering the receiving unit. The shielding unit includes afirst metallic shielding film formed on the outer surface of the first packaging body and a second metallic shielding film formed on the outer surface of the second packaging body, wherein the minimumdistance between the outer surface of the first packaging body and the outer surface of the second packaging body is less than 50 microns. On the basis of the design, the size of the sensor can be reduced effectively.

Description

technical field [0001] The present invention relates to a proximity sensor, in particular to an improved structure of the proximity sensor which can effectively reduce the volume of the sensor and avoid noise cross-talk. Background technique [0002] At present, touch screens are often used in conjunction with ambient light sensors and proximity sensors. The ambient light sensor is used to adjust the brightness of the screen so that the screen changes with the ambient light to achieve energy saving and eye protection. Technical effect, the proximity sensor is used to sense whether there is an object in front. For example, the proximity sensor can be combined with a smart phone to judge whether the user is close to answering the call through optical or electromagnetic means, so as to trigger the smart phone A function to temporarily turn off the touch screen during communication. [0003] see figure 1 and figure 2 A traditional proximity sensor 100' usually includes a sub...

AI Technical Summary

Problems solved by technology

However, because the traditional proximity sensor 100' is equipped with a shielding shell 5', it not only cannot meet the requirements of product lightweight, but also the thickness of the barrier plate 51' will cause the distance between the light emitting unit 2' and the light receiving unit 3' to be insufficient. Effective reduction, making it difficult to reduce the size of the sensor

[0005] In addition, from the point of view of product mass production, the manufacture of the traditional proximity sensor 100 ′ requires a special placement machine to fix the shielding shell 5 ′, and the shielding shell 5 ′ is usually made of glue (not shown in the figure). ) to be fixed on the substrate 1', but it is difficult for the machine to accurately control the amount of glue and its distribution position. Too much glue will cause overflow problems, and too little glue or poor uniformity of distribution will easily cause shadowing The shell 5' falls off or shifts, which affects the shielding effect, and these problems will reduce the product yield

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