Array color sensor

Abstract

The utility model discloses an array type color sensor. The array type color sensor comprises a photosensitive diode array chip, a multi-window optical filter, a bracket and a plastic package body, the photosensitive diode array chip is installed on the support and electrically connected with the support, the number of windows of the multi-window optical filter is consistent with the number of light receiving sources of the photosensitive diode array chip, and when the multi-window optical filter is attached to the photosensitive diode array chip in a matched mode, the photosensitive diode array chip receives light through the windows of the multi-window optical filter; the photosensitive diode array chip and the multi-window optical filter are packaged on the support through the plastic packaging body. The utility model relates to the technical field of detection equipment, and can solve the problems of complex structure and high cost of a color sensor in the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of detection equipment, in particular to an array type color sensor. Background Art

[0002] In devices such as color mark sensors, color detection, and spectrum detection, it is necessary to sense and detect colors. For example, Chinese invention patent CN105683728B discloses a color sensor device and a method for color sensor calibration, including a color sensor, which is arranged to generate at least a first channel signal, and the first channel signal indicates the color of light incident on the color sensor. The processing unit is connected to the color sensor and is arranged to generate a tuple of color signals by processing at least the first channel signal. The memory is connected to the processing unit, and the control unit is connected to the processing unit and the memory. In addition, the control unit is arranged to receive calibration data and is arranged to store the calibration data with the help of the memory, which associates the tuple of color signals with the tuple of calibrated color signals. The interface is connected to the processing unit and includes an interface terminal.

[0003] The color sensor device has many parts, a complex structure, and a high cost. Therefore, it is necessary to provide an array color sensor that can solve the problem of complex structure and high cost of color sensors in the prior art. Summary of the invention

[0004] The utility model aims to provide an array type color sensor, which can solve the problems of complex structure and high cost of color sensors in the prior art.

[0005] The utility model is achieved in this way:

[0006] An array color sensor comprises a photodiode array chip, a multi-window filter, a bracket and a plastic package; the photodiode array chip is mounted on the bracket and electrically connected to the bracket, the number of windows of the multi-window filter is consistent with the number of light receiving sources of the photodiode array chip, so that when the multi-window filter is matched and attached to the photodiode array chip, the photodiode array chip receives light through the windows of the multi-window filter; the photodiode array chip and the multi-window filter are encapsulated on the bracket through the plastic package.

[0007] The photodiode array chip is provided with a plurality of photodiodes, which are arranged in an array in groups of three, and the multi-window filters are attached to the plurality of photodiodes.

[0008] A plurality of filter windows are formed on the multi-window filter, and the filter windows are arranged in an array in groups of three, so that the filter windows are respectively correspondingly attached to a plurality of photosensitive diodes.

[0009] Each group of filter windows includes a red filter window, a green filter window and a blue filter window, and the red filter window, the green filter window and the blue filter window are respectively covered on each group of three photosensitive diodes.

[0010] The center distance between each two adjacent filter windows is consistent with the center distance between each two adjacent photosensitive diodes, so as to ensure that each filter window is arranged in a one-to-one correspondence with each photosensitive diode.

[0011] A light shielding material is provided at the gap between two adjacent filter windows, so that when the filter window covers the photodiode, the photodiode receives light through the filter window.

[0012] The array color sensor also includes an infrared absorption filter, which covers the multi-window filter and is packaged on the bracket through a plastic package.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The utility model is provided with a photodiode array chip and a multi-window filter, and each filter window of the multi-window filter filters light to form light of corresponding color, and receives the light of the color through the photodiode corresponding to each filter window, and outputs a corresponding electrical signal, thereby realizing color detection. The sensor structure and the detection process are simple, and the cost is reduced. The utility model can be widely used in the fields of color mark sensors, color detection, spectrum detection, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional view of the array color sensor of the utility model (without the infrared absorption filter installed);

[0016] Figure 2 It is a cross-sectional view of the array color sensor of the utility model (with infrared absorption filter installed);

[0017] Figure 3 This is a front view of the photodiode array chip in the array color sensor of the utility model;

[0018] Figure 4 It is a front view of a multi-window filter in an array-type color sensor of the utility model.

[0019] In the figure, 1 is a photodiode array chip, 11 is a photodiode, 2 is a multi-window filter, 21 is a filter window, 3 is an infrared absorption filter, 4 is a bracket, and 5 is a plastic package. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0021] Please see attached Figure 1 , an array color sensor, comprising a photodiode array chip 1, a multi-window filter 2, a bracket 4 and a plastic package 5; the photodiode array chip 1 is mounted on the bracket 4 and electrically connected to the bracket 4, the number of windows of the multi-window filter 2 is consistent with the number of light sources of the photodiode array chip 1, so that when the multi-window filter 2 is matched and attached to the photodiode array chip 1, the photodiode array chip 1 receives light through the windows of the multi-window filter 2; the photodiode array chip 1 and the multi-window filter 2 are encapsulated on the bracket 4 through the plastic package 5.

[0022] The photodiode array chip 1 can be prepared based on photodiodes using the semiconductor wafer flow process of the existing technology. The number of light sources of the photodiode array chip 1 can be adaptively adjusted according to actual application requirements. The number of windows of the multi-window filter 2 is consistent with the number of light sources of the photodiode array chip 1, so that external light is filtered by the multi-window filter 2 and then irradiated onto the receiving light source of the photodiode array chip 1, thereby achieving the purpose of color detection.

[0023] Preferably, the plastic package 5 can be made of opaque plastic material to prevent external light from directly irradiating the photodiode array chip 1 through the plastic package 5 and interfering with the light receiving light. The bracket 4 can be a PCB board, etc., which can be electrically connected to the photodiode array chip 1 to achieve the output of electrical signals.

[0024] Please see attached Figure 3 The photodiode array chip 1 is provided with a plurality of photodiodes 11 (i.e. the light receiving light mentioned above), and the plurality of photodiodes 11 are arranged in an array in groups of three, and the multi-window filter 2 is attached to the plurality of photodiodes 11.

[0025] The photodiode 11 can convert the optical signal into an electrical signal and output electrical signals of different intensities according to the light intensity, thereby realizing the color detection function by collecting and processing the electrical signals.

[0026] Please see attached Figure 4 The multi-window filter 2 is formed with a plurality of filter windows 21 (i.e., the windows mentioned above), and the plurality of filter windows 21 are grouped into three and arranged in an array, so that the plurality of filter windows 21 are respectively attached to a plurality of photodiodes 11.

[0027] Preferably, the shape, size and number of the filter window 21 are determined according to the shape, size and number of the photosensitive diode 11, so as to ensure that the filter window 21 is arranged in a one-to-one correspondence with the photosensitive diode 11. The light filtered by the filter window 21 is received by the corresponding photosensitive diode 11, and the photosensitive diode 11 outputs a corresponding electrical signal according to the intensity of the light.

[0028] Each group of filter windows 21 includes a red filter window, a green filter window and a blue filter window, and the red filter window, the green filter window and the blue filter window are respectively covered on each group of three photosensitive diodes 11.

[0029] The red filter window is used to pass red light and filter light of other colors, so that the photosensitive diode 11 corresponding to the red filter window can output an electrical signal of red light. If the electrical signal is strong, the color is determined to be red. If the electrical signal is weak, the color is determined to be non-red, which is used to detect red. Similarly, the green filter window and the blue filter window are used to detect green and blue, respectively. During detection, the photosensitive diodes 11 arranged in an array output corresponding electrical signals. After filtering, amplifying and other conventional processing are performed on each electrical signal, the color of the detected light can be determined. The detection process is simple.

[0030] The center distance between each two adjacent filter windows 21 is consistent with the center distance between each two adjacent photodiodes 11 , so as to ensure that each filter window 21 is arranged in a one-to-one correspondence with each photodiode 11 .

[0031] A shading material (not shown in the figure) is provided in the gap between two adjacent filter windows 21, so that when the filter window 21 covers the photodiode 11, the photodiode 11 receives light through the filter window 21, thereby preventing external light from interfering with the photodiode 11 through the gap, thereby ensuring the accuracy of the detection result.

[0032] Please see attached Figure 2 The array color sensor also includes an infrared absorption filter 3, which covers the multi-window filter 2 and is packaged on the bracket 4 through a plastic package 5.

[0033] The infrared absorption filter 3 can be made of glass, which can provide protection for the multi-window filter 2 and facilitate the transmission of light.

[0034] Please see attached Figure 1 To Attachment Figure 4 , the manufacturing method and working principle of the utility model are:

[0035] Through the semiconductor wafer taping process, a photosensitive pixel array is prepared using photodiodes 11 to form a photosensitive diode array chip 1 as an output conversion device for converting light information into electrical signals. The number of photosensitive diodes 11 arranged is usually three in a group, and can be increased or decreased in any number (or group) according to different work requirements. The size of a single pixel and the spacing of the arrangement can reach the micron level, and the maximum array scale can reach tens of thousands of square millimeters.

[0036] The multi-window filter 2 is prepared by existing technology, the center distance and arrangement of each filter window 12 are consistent with the center distance and arrangement of each photodiode 11, the spectral curve of the filter window 12 is customized according to requirements, and the gaps between adjacent filter windows 12 are shielded by shading material.

[0037] In color sensor applications, the filter window 12 is generally a red filter window, a green filter window, and a blue filter window. Ultra-precision assembly equipment such as a high-precision die bonding machine is used to bond the multi-window filter 2 to the photodiode array chip 1, and the bonding accuracy can reach up to 1 micron.

[0038] The infrared absorption filter 3 is used as a glass substrate to filter and detect the target detection light. The photodiode array chip 1, the multi-window filter 2 and the infrared absorption filter 3 are packaged and protected by a plastic package 5 in a Glass on Chip manner and packaged on a bracket 4.

[0039] External light directly passes through the infrared absorption filter 3 and is filtered by the red filter window, the green filter window and the blue filter window of the filter window 12 to form red light, green light and blue light, which are received by the photosensitive diodes 11 respectively. The color of the light is judged by the intensity of the electrical signal output by each photosensitive diode 11 through the bracket 4, thereby realizing the color detection function, which can be used in the fields of color mark sensor, color detection, spectrum detection, etc.

[0040] The above are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An array color sensor, characterized in that: The invention comprises a photodiode array chip (1), a multi-window filter (2), a bracket (4) and a plastic package (5); the photodiode array chip (1) is mounted on the bracket (4) and is electrically connected to the bracket (4); the number of windows of the multi-window filter (2) is consistent with the number of light receiving sources of the photodiode array chip (1), so that when the multi-window filter (2) is matched and attached to the photodiode array chip (1), the photodiode array chip (1) receives light through the windows of the multi-window filter (2); the photodiode array chip (1) and the multi-window filter (2) are packaged on the bracket (4) through the plastic package (5).

2. The array color sensor according to claim 1, characterized in that: The photodiode array chip (1) is provided with a plurality of photodiodes (11), and the plurality of photodiodes (11) are arranged in an array in groups of three. The multi-window filter (2) is attached to the plurality of photodiodes (11).

3. The array color sensor according to claim 2, characterized in that: A plurality of filter windows (21) are formed on the multi-window filter (2), and the filter windows (21) are arranged in an array in groups of three, so that the filter windows (21) are respectively and correspondingly attached to a plurality of photosensitive diodes (11).

4. The array color sensor according to claim 3, characterized in that: Each group of filter windows (21) comprises a red filter window, a green filter window and a blue filter window, and the red filter window, the green filter window and the blue filter window are respectively and correspondingly covered on each group of three photosensitive diodes (11).

5. The array color sensor according to claim 3 or 4, characterized in that: The center distance between each two adjacent filter windows (21) is consistent with the center distance between each two adjacent photosensitive diodes (11), so as to ensure that each filter window (21) and each photosensitive diode (11) are arranged in a one-to-one correspondence.

6. The array color sensor according to claim 5, characterized in that: A light shielding material is provided at the gap between two adjacent filter windows (21), so that when the filter window (21) covers the photodiode (11), the photodiode (11) receives light through the filter window (21).

7. The array color sensor according to claim 1, characterized in that: The array color sensor further comprises an infrared absorption filter (3), which covers the multi-window filter (2) and is packaged on the bracket (4) via a plastic package (5).

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