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OLED-based liquid flow rate photoelectric sensor

A photoelectric sensor and flow rate technology, which is applied in the direction of electric solid-state devices, semiconductor devices, fluid velocity measurement, etc., can solve the problems of large deviation of measurement results, slow response speed of photosensitive devices, and reduced sensitivity

Pending Publication Date: 2019-05-21
CHINA JILIANG UNIV
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  • Claims
  • Application Information

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Problems solved by technology

[0003] However, due to the low light output efficiency of the light source and the slow response speed of the photosensitive device of the traditional photoelectric sensor, the detection sensitivity is greatly reduced, resulting in large deviations in the measurement results. At the same time, the liquid’s ability to reflect light is not strong, so There are certain difficulties in the measurement of liquid flow rate

Method used

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  • OLED-based liquid flow rate photoelectric sensor
  • OLED-based liquid flow rate photoelectric sensor

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Embodiment Construction

[0013] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0014] like figure 1 As shown, it includes two OLED light-emitting units, six photodiodes, a CMOS circuit substrate, and packaging. The OLEDs and photodiodes are sequentially integrated on the CMOS substrate as shown in the figure and packaged.

[0015] Preferably, the photodiode is a PIN photodiode, which has the advantage of fast response.

[0016] Preferably, the driving circuit of the OLED light-emitting unit adopts a driving circuit with a 4T2C structure.

[0017] Described OLED light-emitting unit is made up of anode, hole injection layer, hole transport layer, organic light-emitting layer, electron transport layer, electron injection layer, cathode, as figure 2 As shown, a grating layer is fabricated on the anode, and SiO is deposited on the anode by chemical vapor deposition 2 , in SiO 2 Put a layer of photoresist film on the layer, then irradiate the gr...

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Abstract

The invention provides an OLED-based liquid flow rate photoelectric sensor. The photoelectric sensor comprises a CMOS circuit substrate, two OLED lighting units, six photoelectric diodes, and an encapsulating layer. According to the OLED lighting units, a layer of Si-SiO2 grating is manufactured on an anode, and is used for enhancing light output efficiency of OLED and improving flexibility of thesensor. The OLE and the photoelectric diode are combined with the CMOS process, so that the manufacture process of the photoelectric sensor is simplified, the cost is lowered, and the measurement performance is improved.

Description

technical field [0001] This patent relates to the field of liquid flow rate monitoring, specifically an OLED-based liquid flow rate photoelectric sensor. Background technique [0002] The research and application of photoelectric sensors is the most important technology today. This sensor is based on the photoelectric effect. Objects reflect light waves after being irradiated by visible light. The sensor senses the light waves and converts the broadcast signal into a current signal for transmission. On the CMOS substrate, the manufacturing process of the viewpoint sensor is simplified and the cost is reduced. [0003] However, due to the low light output efficiency of the light source and the slow response speed of the photosensitive device of the traditional photoelectric sensor, the detection sensitivity is greatly reduced, resulting in large deviations in the measurement results. At the same time, the liquid’s ability to reflect light is not strong, so There are certain ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/52H01L25/16G01P5/26
Inventor 韦一柏沁园唐莹彭应全王玉龙杨媚
Owner CHINA JILIANG UNIV