CN111027513A

CN111027513A - Display integrating optical identification function

Info

Publication number: CN111027513A
Application number: CN201911355545.3A
Authority: CN
Inventors: 王世育; 陈俊达
Original assignee: Interface Optoelectronics Shenzhen Co Ltd; Interface Technology Chengdu Co Ltd; General Interface Solution Ltd
Current assignee: Interface Optoelectronics Shenzhen Co Ltd; Interface Technology Chengdu Co Ltd; General Interface Solution Ltd
Priority date: 2019-12-25
Filing date: 2019-12-25
Publication date: 2020-04-17
Also published as: TW202123874A; TWI715401B

Abstract

A display integrated with optical recognition function comprises a circuit substrate, a plurality of pixel micro light emitting diode chips with different colors, a plurality of infrared micro light emitting diode chips, a plurality of optical sensing elements, a flat transparent member and a plurality of pinhole imaging elements. The flat transparent member covers the pixel micro-LED chips, the infrared micro-LED chips and the optical sensing elements. The pinhole imaging elements are arranged on the flat plate light-transmitting piece. Each optical sensing device senses the light emitted from the infrared micro-LED chips reflected by the object to be tested through a corresponding one of the pinhole imaging devices. The display can integrate the optical recognition function therein, and is beneficial to being applied to portable or wearable mobile electronic devices with light and thin volume.

Description

Display integrating optical identification function

Technical Field

The present disclosure relates to a display, and more particularly, to a display with integrated optical recognition function.

Background

The conventional device for recognizing the biological characteristics of human veins is still a module with large volume, thickness and high price, and is not suitable for the portable or wearable mobile electronic device with light and thin volume. Therefore, there is a need to provide an improved biometric device to solve the problems of the prior art.

Disclosure of Invention

An embodiment of the present disclosure provides a display integrated with optical recognition function, which includes a circuit substrate, a plurality of pixel micro light emitting diode chips with different colors, a plurality of infrared micro light emitting diode chips, a plurality of optical sensing elements, a flat light-transmitting element, and a plurality of pinhole imaging elements. The flat transparent member covers the pixel micro-LED chips, the infrared micro-LED chips and the optical sensing elements. The pinhole imaging elements are arranged on the flat plate light-transmitting piece. Each optical sensing device senses the light emitted from the infrared micro-LED chips reflected by the object to be tested through a corresponding one of the pinhole imaging devices.

In other embodiments of the present disclosure, the vertical projection of each pinhole imaging device on the circuit substrate does not cover the pixel micro-led chips.

In other embodiments of the present disclosure, the vertical projection of each pinhole imaging device on the circuit substrate does not cover the infrared micro led chips.

In other embodiments of the present disclosure, the pixel micro-light emitting diode chips include red, green and blue pixel micro-light emitting diode chips.

In other embodiments of the present disclosure, the optical sensing elements are cmos elements.

In other embodiments of the present description, the plate light-transmitting member has a uniform thickness.

In other embodiments of the present disclosure, each optical sensing element is aligned with a corresponding one of the pinhole imaging elements.

In other embodiments of the present disclosure, each optical sensing element is surrounded by one of the adjacent infrared micro-LED chips and a plurality of adjacent pixel micro-LED chips.

In other embodiments of the present disclosure, the width of each pixel micro-LED chip ranges from 1 micron to 100 microns.

In other embodiments of the present disclosure, the width of each infrared micro LED chip ranges from 1 micron to 100 microns.

In summary, the light emitting diode display with integrated optical identification function of the present invention integrates the pixel micro light emitting diode chip, the infrared micro light emitting diode chip and the micro optical sensing device on the circuit substrate together, and replaces the curved optical lens with the micro pinhole imaging device, so as to reduce the overall thickness of the display. Therefore, the display can integrate the optical recognition function therein, and is beneficial to being applied to portable or wearable mobile electronic devices with light and thin volume.

The above description will be described in detail by embodiments, and further explanation will be provided for the technical solution of the present invention.

Drawings

In order to make the aforementioned and other objects, features, advantages and embodiments of the invention more comprehensible, the following description is given:

FIG. 1 is a schematic diagram of a micro light emitting diode display integrated with an optical recognition function according to an embodiment of the invention; and

FIG. 2 is a schematic cross-sectional view illustrating a micro light emitting diode display integrated with optical recognition according to an embodiment of the invention;

FIG. 3 is a schematic diagram illustrating an application of a wristband integrated with an optical recognition function according to an embodiment of the invention;

FIG. 4 is a schematic diagram illustrating an application of a mobile phone integrated with optical recognition according to an embodiment of the present invention; and

fig. 5 is a schematic view illustrating an application of the door access control device with integrated optical recognition function according to an embodiment of the invention.

Reference numerals:

a display device

102

An optical sensing element

106.. pixel micro light emitting diode chip

106R

106G

106B

108.. infrared micro light emitting diode chip

Packaging glue

A plate light transmitting member

A pinhole imaging element

Needle hole

150.. an object to be tested

160

200

300

A screen

400

402

Thickness of

Width of (W1.. d.)

Width of (W2.. d.)

W3.. width

Detailed Description

Referring to fig. 1 and 2, fig. 1 is a schematic diagram of an led display integrated with an optical identification function according to an embodiment of the invention (removing components such as a flat-panel light-transmitting element and a pinhole imaging element), and fig. 2 is a schematic cross-sectional diagram of an led display integrated with an optical identification function according to an embodiment of the invention.

The LED display 100 includes a plurality of pixel micro-LED chips (such as red micro-LED chip 106R, green micro-LED chip 106G, and blue micro-LED chip 106B) with different colors as the display pixels to realize the display function. The optical recognition function of the display is realized by the optical sensing device 104, the infrared micro-LED chip 108 and the pinhole imaging device 112.

In the present embodiment, the optical sensing element 104 may be a complementary metal oxide semiconductor (cmos sensor), but not limited thereto.

In the present embodiment, each optical sensing element 104 is surrounded by the adjacent infrared micro-light emitting diode chip 108, the adjacent red micro-light emitting diode chip 106R, the adjacent green micro-light emitting diode chip 106G and the adjacent blue micro-light emitting diode chip 106B, but not limited thereto.

Specifically, the chip and the device are disposed on the circuit substrate 102 to obtain power and be controlled by the related functions. The circuit substrate 102 may be a printed circuit board or a flexible circuit board, but is not limited thereto.

By "micro" is meant that the dimensions of these chips are on the order of microns. Specifically, the width W2 of the pixel micro LED chip 106 ranges from 1 micron to 100 microns, and the width W3 of the infrared micro LED chip 108 ranges from 1 micron to 100 microns. The size of the optical sensing element 104 may also be on the order of microns, i.e., the width W1 of the optical sensing element 104 also ranges from 1 micron to 100 microns.

After the chips and devices are mounted on the circuit substrate 102, the chips and devices are sealed with a packaging adhesive 109 (e.g., an optical transparent adhesive) to prevent moisture, and then the packaging adhesive 109 is covered with a flat transparent member 110. In the present embodiment, the plate light-transmitting member 110 has a uniform thickness T, but not limited thereto.

A plurality of micro pinhole imaging devices 112 are disposed on the plate light-transmitting member 110. Each pinhole imaging device 112 is aligned with one of the optical sensing devices 104, in other words, the vertical projection of each pinhole imaging device 112 on the circuit substrate 102 covers or overlaps the optical sensing device 104. Therefore, each optical sensing device 104 senses the light emitted from the object 150 (e.g. the vein tissue under the skin of the human body) by the infrared micro led chip 108 reflected by the corresponding pinhole imaging device 112, so as to sense the local image of the object 150. The array formed by the optical sensing devices 104, the infrared micro-LED chips 108 and the pinhole imaging devices 112 on the circuit substrate 102 can perform large-area sensing, vein recognition or non-contact recognition of the object 150 to be tested.

The pinhole imaging device 112 projects the image of the object 150 to be measured to the optical sensing device 104 by using the principle of pinhole imaging. The pinhole imaging device 112 is opaque except for the pinholes 112a, and therefore, the proportion of the pinhole imaging device to the surface of the plate light-transmitting member 110 needs to be controlled.

Although the flat transparent member 110 is provided with a plurality of pinhole imaging devices 112, the proportion of the pinhole imaging devices 112 occupying only a small portion of the surface of the flat transparent member 110 is controlled so that the pinhole imaging devices 112 do not affect the display function of the pixel micro-led chips (e.g., the red micro-led chip 106R, the green micro-led chip 106G, and the blue micro-led chip 106B). In the present embodiment, the vertical projection of each pinhole imaging device 112 on the circuit substrate 102 does not cover any pixel micro led chip 106, but is not limited thereto. In the present embodiment, the vertical projection of each pinhole imaging device 112 on the circuit substrate 102 does not cover any infrared micro led chip 108, but is not limited thereto.

Referring to fig. 3, an application diagram of a wristband integrated with an optical recognition function according to an embodiment of the invention is shown. When the display integrated with the optical recognition function is applied to the wristband 200, the display can be used for sensing the biological characteristics of the vein tissue of the hand 160, thereby achieving various related applications.

Fig. 4 is a schematic application diagram of a mobile phone integrated with optical recognition according to an embodiment of the invention. When the display integrated with the optical recognition function is applied to the mobile phone 300, the screen 302 can be used to sense the biological characteristics of the vein tissue of the hand 160, so as to achieve various related applications.

Fig. 5 is a schematic application diagram of an entrance guard control device integrated with an optical recognition function according to an embodiment of the invention. When the aforementioned display integrated with the optical recognition function is applied to the access control device 400, the panel 402 can be used to sense the biological characteristics of the vein tissue of the hand 160, so as to achieve various related applications.

In summary, the light emitting diode display integrated with optical identification function of the present invention integrates the pixel micro light emitting diode chip, the infrared micro light emitting diode chip and the micro optical sensing device on the circuit substrate together, and replaces the curved optical lens with the micro pinhole imaging device, so as to reduce the overall thickness of the display. Therefore, the display can integrate the optical recognition function therein, and is beneficial to being applied to portable or wearable mobile electronic devices with light and thin volume.

Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A display integrated with optical recognition function, comprising:

a circuit substrate;

a plurality of pixel micro-LED chips with different colors, which are arranged on the circuit substrate;

a plurality of infrared micro LED chips disposed on the circuit substrate;

a plurality of optical sensing elements arranged on the circuit substrate;

a flat transparent member covering the pixel micro-LED chips, the infrared micro-LED chips and the optical sensing elements; and

a plurality of pinhole imaging elements arranged on the flat plate light-transmitting member,

wherein each optical sensing device senses the light emitted by the infrared micro-LED chips reflected by the object to be tested through a corresponding one of the pinhole imaging devices.

2. The display of claim 1, wherein the vertical projection of each pinhole imaging device on the circuit substrate does not cover the pixel micro-led chips.

3. The display of claim 1, wherein the vertical projection of each pinhole imaging device on the circuit substrate does not cover the infrared micro-led chips.

4. The display as claimed in claim 1, wherein the pixel micro-LED chips comprise red, green and blue pixel micro-LED chips.

5. The display of claim 1, wherein the optical sensing elements are CMOS elements.

6. The display of claim 1, wherein the plate light-transmissive member has a uniform thickness.

7. The display of claim 1, wherein each of the optical sensing elements is aligned with a corresponding one of the pinhole imaging elements.

8. The display as claimed in claim 1, wherein each of the optical sensing elements is surrounded by a close proximity of one of the infrared micro-LED chips and a plurality of close proximity of the pixel micro-LED chips.

9. The display as recited in claim 1, wherein each of said pixel micro-LED chips has a width in the range of 1 micron to 100 microns.

10. The display as claimed in claim 1, wherein the width of each infrared micro LED chip ranges from 1 micron to 100 microns.