TWI385880B - Connector of connecting photonic sensor and substrate and method for fabricating photonic sensor - Google Patents

Description

Connector for connecting photo sensor and substrate and photosensor manufacturing method

The present invention relates to a connector, and more particularly to a connector for connecting a photosensor to a substrate.

The optical touch system includes a display screen, a transparent substrate, a light sensor, and a position calculation circuit. In general, the transparent substrate is a glass substrate, and more specifically, the transparent substrate is a Tin-doped Indium Oxide (ITO) glass. The display screen is displayed through a transparent substrate. The photo sensor is a chip module, and the photo sensor needs to be disposed on the transparent substrate, and the light receiving direction of the photo sensor must be parallel to the transparent substrate. In this way, the photo sensor can detect whether there is an indicator (such as a finger or a stylus) on the transparent substrate, and accordingly generate a light sensing signal. For example, the light sensing signal can be a range of sensing images covering the indicator or the distance and angle of the indicator relative to the light sensor. In addition, the photo sensor has a transmission port for transmitting the photo sensing signal to the position calculation circuit. In this way, the position calculation circuit can calculate the position of the indicator above the display screen based on the light sensing signal.

In the prior art, when a user wants to install a wafer module on a glass substrate, most of the user will be taped with a Tape Carrier Package (TCP) or a die bonded die (Chip on Film). , COF), the chip module is first placed on a Flex Printed Circuit (FPC), and then the flexible board is coupled (or pressure bonded) to the glass substrate. However, when the user uses the above method to dispose the photo sensor on the glass substrate, the light receiving direction of the photo sensor is limited. More specifically, if the photo sensor is packaged on a flexible board in the above-described package mode (TCP or COF), the light receiving direction of the photo sensor will be perpendicular to the soft board (as shown in FIG. 1). ). When the flexible board is coupled to the glass substrate, the light receiving direction of the light sensor is perpendicular to the glass substrate. In other words, in an optical touch system, if the user wants to set the photo sensor on the glass substrate by using an existing packaging method (such as TCP or COF), the light receiving direction of the photo sensor is perpendicular to the glass. The substrate causes the light sensor to detect that an indicator (such as a finger or a stylus) is in contact with the display. Although in the prior art, the user can fold the flexible board by an angle and fix the soft board to turn the light receiving direction of the light sensor, the process can only be processed manually, and the process consumes When the yield is not easy to control, the cost of the optical touch system is increased, which brings great inconvenience to the user.

The invention provides a connector for connecting a photo sensor and a substrate. The connector is configured to make a light receiving direction of one of the light sensors parallel to the substrate. The substrate is Tin-doped Indium Oxide (ITO) glass. The light sensor is used to receive light to generate a light sensing signal. The light sensor has a transmission port for transmitting the light sensing signal. The light sensor is applied to an optical touch system. The optical touch system has a display screen and a position calculation circuit. The display screen passes through the substrate to display an image. The position calculation circuit calculates a position of the indicator on the display screen according to a light sensing signal generated by the light sensing module. The connector includes a body and a port. The body is configured to receive the photo sensor, and the photo sensor is transposed such that the light receiving direction of the photo sensor is parallel to the substrate. The port is contained in the body. The port is coupled to the transmission port of the photo sensor such that the photo sensor is coupled to the substrate via the port and the port.

The invention further provides an optical touch system. The optical touch system includes a substrate, a display screen, a light sensing module, and a position calculation circuit. The substrate is a Tin-doped Indium Oxide (ITO) glass. The display is used to display images through the substrate. The light sensing module is configured to receive light to detect an indicator and generate a light sensing signal accordingly. The light sensing module includes a light sensor and a connector. The light sensor is configured to receive light to generate the light sensing signal. The light sensor has a transmission port for transmitting the light sensing signal. The connector includes a body, a connector, and a flexible board. The body is configured to receive the photo sensor, and the photo sensor is transposed such that a light receiving direction of the photo sensor is parallel to the substrate. The port is received in the body and coupled to the transmission port of the photo sensor. The flexible board has a flexible board connector for coupling the connector of the connector to the substrate. The position calculation circuit is configured to calculate a position of the indicator on the display screen according to the light sensing signal.

The invention further provides a method for fabricating a photo sensor. The light sensor has a sensing unit and a lens. The sensing unit is configured to receive light to generate a light sensing signal. The sensing unit has a transmitting end for transmitting the light sensing signal. The lens is used to concentrate light on the sensing unit. The light sensor is applied to an optical touch system. The optical touch system has a substrate, a display screen, and a position calculation circuit. The substrate is Tin-doped Indium Oxide (ITO) glass. The display screen passes through the substrate to display an image. The position calculation circuit calculates a position of an indicator above the display screen based on the light sensing signal. The light sensor can be placed in a connector. The connector can transpose a light receiving direction of the light sensor such that the light receiving direction of the light sensor is parallel to the substrate and the light sensor can avoid the high temperature process. The manufacturing method comprises: filling a bottom filling glue between the sensing unit and a bearing component to fix the sensing unit to the bearing component, pasting the lens on the sensing unit, and in the sensing unit A fixing element is filled around the lens to encapsulate the sensing unit and the lens.

In view of this, the present invention provides a connector that can connect a photo sensor to a substrate. The connector provided by the present invention can transpose the photo sensor such that the light receiving direction of the photo sensor is parallel to the substrate. In this way, by using the connector provided by the present invention, the photo sensor can be disposed on the substrate, and the light receiving direction of the photo sensor can be maintained parallel to the substrate.

Please refer to Figure 2. Fig. 2 is a schematic view showing the connector 200 according to the first embodiment of the present invention. In FIG. 2, the connector 200 is disposed on the substrate 202. The substrate 202 is a transparent substrate (such as a glass substrate or an ITO glass). The connector 200 includes a body 210, a connecting port 220, an upper cover 230, and a light receiving port 240. There is sufficient space in the body 210 for accommodating a photo sensor 201, and the photo sensor 201 is transposed to make the light receiving direction of the photo sensor 201 parallel to the substrate 202. The port 220 is received in the body 210. The port 220 is coupled to the transmission port of the photo sensor 201 so that the photo sensor 201 can be coupled to the substrate 202 through the port and the port 202. As shown in Fig. 2, the port 220 can be implemented by a plurality of L-shaped gold fingers 221 (as shown in Figs. 3 and 4). Each gold finger 221 includes sections L ₁ and L ₂ . The segment L ₁ is used to couple to the transmission port of the photo sensor 201 , and the segment L ₁ is perpendicular to the substrate 202 . Section L ₂ is used to couple to substrate 202 and section L ₂ is parallel to substrate 202. The upper cover 230 can be closed after the photo sensor 201 is placed in the body 210 to prevent the photo sensor 201 from falling off and to prevent the photo sensor 201 from being directly pressed. The light collection port 240 is used to provide light to the photo sensor 201. In this way, the connector 200 of the present invention is coupled to the substrate 202, and the photo sensor 201 is placed in the body 210, so that the receiving direction of the photo sensor 201 is parallel to the substrate 202, and the light is sensed. The device 201 can transmit the optical sensing signal S _LS through the connection port 220 of the connector 200 to the connector 200.

Please refer to Figure 5. Fig. 5 is a schematic view showing a connector 500 according to a second embodiment of the present invention. The structure and working principle of the connector 500, the photo sensor 501, and the substrate 502 are similar to those of the connector 200, the photo sensor 201, and the substrate 202, respectively. The connector 500 further includes a flexible board 550 as compared to the connector 200. The flexible board 550 has a flexible board connection 551. The soft board connection 551 of the flexible board 550 is coupled between the connection port 520 of the connector 300 and the substrate 502. In the current process of the flat panel display, the driving circuit of the display is coupled to the glass substrate through the flexible board. Therefore, the connector 500 can utilize the production equipment of the general flat display by the soft board 550. It is coupled to the substrate 502.

Please refer to Figure 6. Figure 6 is a schematic diagram showing a light sensing module 600 in accordance with a first embodiment of the present invention. The light sensing module 600 includes a light sensor 610 and a connector 620. The photo sensor 610 is disposed in the connector 620. The structure and working principle of the photo sensor 610 and the connector 620 are similar to those of the photo sensor 201 and the connector 200, respectively, and therefore will not be described again. When the light sensing module 600 is coupled to the substrate 601 , the light receiving direction of the light sensing module 600 is parallel to the substrate 601 . Therefore, if the light sensing module 600 is disposed on a substrate of an optical touch system, the light sensing module 600 can detect the indicator on the substrate and generate the light sensing signal S _LS .

Please refer to Figure 7. Figure 7 is a schematic diagram showing a light sensing module 700 in accordance with a second embodiment of the present invention. The light sensing module 700 includes a light sensor 710 and a connector 720. The photo sensor 710 is disposed in the connector 720. The structure and working principle of the photo sensor 710 and the connector 720 are similar to those of the photo sensor 501 and the connector 500, and therefore will not be described again. Similarly, when the light sensing module 700 is coupled to the substrate 701 , the light receiving direction of the light sensing module 700 is parallel to the substrate 701 . Therefore, if the light sensing module 700 is disposed on a substrate of an optical touch system, the light sensing module 700 can detect the indicator on the substrate and generate the light sensing signal S _LS .

Please refer to Figure 8. Figure 8 is a schematic illustration of an optical touch system 800 of the present invention. The optical touch system 800 includes a substrate 810, a display screen 820, a light sensing module 830, and a position calculation circuit 840. In general, the substrate 810 is a transparent substrate, and more specifically, the substrate 810 is a glass substrate or ITO glass. The display screen 820 is transmitted through the substrate 810 to display an image. The light sensing module 830 can be implemented by the light sensing module 600 or 700. The light sensing module 830 is disposed on the substrate 810 , and the light receiving direction of the light sensing module 830 is parallel to the substrate 810 . The light sensing module 830 receives light to detect the indicator O ₁ (such as a finger) on the substrate 810, and accordingly generates the light sensing signal S _LS . In this way, the position calculation circuit 840 can calculate the position of the pointer O ₁ above the display screen 820 according to the light sensing signal S _LS , and realize the function of the touch.

In addition, it is worth noting that in the prior art, the photo sensor is directly disposed on the flexible board in a TCP or COP package, so the photo sensor needs to pass a high temperature process, for example, such as reflow soldering (reflow) ). Since the lens of the light sensor (LENS) is not heat-resistant, the lens of the light sensor needs to be assembled to the light sensor after the light sensor passes the high temperature process. This will incur additional costs. However, with the connector of the present invention, the photosensor can be placed directly into the connector without going through a high temperature process. Therefore, when manufacturing the photo sensor, the other components of the photo sensor and the lens of the photo sensor can be simultaneously packaged into one wafer module, thereby reducing the cost. The method of fabricating the photosensor described above will be further described below.

Please refer to Figure 9 and Figure 10. 9 and 10 are schematic views illustrating a method of fabricating the photo sensor 900 of the present invention. The photo sensor 900 includes a sensing unit 910, a lens 920, and a shading element 930. The sensing unit 910 is configured to receive light to generate a light sensing signal S _LS , and the sensing unit 910 has a transmitting end for use as a transmission port of the light sensor 900 . The sensing unit 910 is typically a chip of a Chip Scale Package (CSP). The lens 920 is used to converge light to the sensing unit 910. The light shielding member 930 is configured to shield the light of the surface of the non-normally incident light sensor 900 so that the light receiving direction of the light sensor 900 is almost from the direction perpendicular to the surface of the lens 920 and the sensing unit 910. It will not be disturbed by light from other directions. In addition, if the sensing unit 910 of the photo sensor 900 is mainly for receiving infrared light to generate the photo sensing signal S _LS , the shading element 930 can block the infrared light.

The photo sensor 900 shown in FIG. 9 is: (1) the transmission end of the sensing unit 910 is coupled to the carrier element 901 by a surface mount technology (SMT), (2) A bottom filling is filled between the sensing unit 910 and the carrying member 901 to fix the sensing unit to the carrying member 901, and (3) the lens 920 is disposed on the sensing unit 910 in an adhesive manner. (4) The fixing unit 902 is filled around the sensing unit 910 and the lens 920 to encapsulate the sensing unit 910 and the lens 920, and (5) the light shielding element 930 is disposed around the lens 920 to shield the non-normally incident light sensor. The light of the surface of 900.

The photo sensor 900 shown in FIG. 10 is manufactured by: (1) filling a bottom filling filler between the sensing unit 910 and the carrier member 901 to fix the sensing unit to the carrier member 901, (2) The lens 920 is disposed on the sensing unit 910 in a pasting manner, (3) the transmission end of the sensing unit 910 is coupled to the carrier element 901 by means of a metal wire connection, and (4) the sensing unit 910 and the lens are The fixing member 902 is filled around the 920 to encapsulate the sensing unit 910 and the lens 920, and (5) the light shielding member 930 is disposed around the lens 920 to shield the light of the surface of the non-normally incident light sensor 900.

In summary, the connector provided by the present invention can connect the photo sensor and the substrate to transpose the photo sensor such that the light receiving direction of the photo sensor is parallel to the substrate. In this way, by using the connector provided by the present invention, the photo sensor can be disposed on the substrate while the light receiving direction of the photo sensor is parallel to the substrate. The present invention further provides a light sensing module. When the light sensing module of the present invention is coupled to a substrate, the light sensing direction of the light sensing module of the present invention is parallel to the substrate. . The invention further provides an optical touch control system. In the optical touch control system of the present invention, the light receiving direction of the light sensing module is parallel to the substrate. In addition, with the connector of the present invention, the present invention further provides a method for manufacturing a photo sensor, which can simultaneously package the lens and the sensing unit of the photo sensor into a wafer module, thereby reducing the cost and bringing the user more Great convenience.

The above are only the preferred embodiments of the present invention, and all changes and modifications made to the scope of the present invention should be within the scope of the present invention.

200, 500, 620, 720‧‧‧ connectors

201, 501, 610, 710‧‧‧ optical sensors

202, 502, 601, 701, 810‧‧‧ substrates

210, 510‧‧‧ ontology

220, 520‧‧‧ Connections

221‧‧‧ Gold Finger

230, 530‧‧ ‧ upper cover

240, 540‧‧‧ light port

550‧‧‧soft board

551‧‧‧Soft board connection埠

600, 700, 830‧‧‧Light sensing module

800‧‧‧Optical touch system

820‧‧‧ display screen

840‧‧‧Location calculation circuit

O ₁ ‧‧‧ Indicators

901‧‧‧Loading components

902‧‧‧Fixed components

910‧‧‧Sensor unit

920‧‧‧ lens

930‧‧‧ shading elements

1 is a schematic view illustrating that a light receiving direction of a photo sensor in a prior art optical touch system is perpendicular to a glass substrate.

Fig. 2 is a schematic view showing a connector according to a first embodiment of the present invention.

3 and 4 are schematic views showing the connection of the connector of the present invention.

Figure 5 is a schematic view showing a connector according to a second embodiment of the present invention.

Figure 6 is a schematic view showing a light sensing module according to a third embodiment of the present invention.

Figure 7 is a schematic view showing a light sensing module according to a fourth embodiment of the present invention.

Figure 8 is a schematic view showing the optical touch system of the present invention.

9 and 10 are schematic views for explaining a method of fabricating the photosensor of the present invention.

200. . . Connector

201. . . Light sensor

202. . . Substrate

210. . . Ontology

220. . . Connection

230. . . Upper cover

240. . . Light collection port

Claims (20)

A connector for connecting a photo sensor and a substrate such that a light receiving direction of one of the photo sensors is parallel to the substrate, the substrate is glass, and the photo sensor is used to receive light to generate a light sensation a light sensor having a transmission port for transmitting the light sensing signal, the light sensor being applied to an optical touch system, the optical touch system having a display screen and a position calculation The display screen is configured to display an image through the substrate, and the position calculation circuit calculates a position of the indicator on the display screen according to the light sensing signal generated by the light sensing module. The device includes: a body for accommodating the photo sensor, and transposing the photo sensor such that the light receiving direction of the photo sensor is parallel to the substrate; and a connection port is received in the body And connecting the transmission port of the photo sensor to enable the photo sensor to be coupled to the substrate through the transmission port. The connector of claim 1, wherein the connector further comprises: a flexible board having a flexible board connection coupled between the connection port of the connector and the substrate. The connector of claim 1, wherein the system is fixed to the flexible board in a package manner, which is a Tape Carrier Package (TCP) or a die soft die bonding ( Chip on Film, COF). The connector of claim 1, wherein the body further comprises an upper cover for preventing the photo sensor from falling off and preventing the photo sensor from being pressed. The connector of claim 1, wherein the body further comprises a light collecting port for providing light to the light sensor. The connector of claim 1, wherein the photo sensor comprises: a sensing unit for receiving light to generate the light sensing signal, the sensing unit having a transmitting end for the light sensing The transmission of the device; and a lens for concentrating the light to the sensing unit. The connector of claim 1, wherein the substrate is Tin-doped Indium Oxide (ITO) glass. A light sensing module includes: a light sensor for receiving light to generate a light sensing signal, the light sensor having a transmission port for transmitting the light sensing signal; and a request item The connector is configured to be coupled to the photo sensor, and the connector transposes the photo sensor such that the light receiving direction of the photo sensor is parallel to the substrate. The optical sensing module of claim 8, wherein the connector further comprises: a flexible board having a flexible board connection coupled between the connecting port of the connector and the substrate. An optical touch system includes: a substrate, the substrate is glass; a display screen for transmitting images through the substrate; and a light sensing module for receiving light to detect Detecting an indicator and generating a light sensing signal, the light sensing module comprising: a light sensor for receiving light to generate the light sensing signal, the light sensor having a transmission port, For transmitting the light sensing signal; a connector comprising: a body for accommodating the light sensor, and transposing the light sensor to cause a light receiving direction of the light sensor Parallel to the substrate; a connection port received in the body, coupled to the transmission port of the photo sensor; and a flexible board having a flexible board connection for the connector The connection port is coupled to the substrate; and a position calculation circuit is configured to calculate a position of the indicator on the display screen according to the light sensing signal. The optical touch system of claim 10, wherein the system is fixed to the flexible board in a package manner, and the package is a Tape Carrier Package (TCP) or a die. Chip on Film (COF). The optical touch system of claim 10, wherein the body further comprises an upper cover for preventing the photo sensor from falling off and preventing the photo sensor from being pressed. The optical touch system of claim 10, wherein the body further comprises a light collecting port for providing light to the light sensor. The optical touch system of claim 10, wherein the light sensor comprises: a sensing unit for receiving light to generate the light sensing signal, the sensing unit having a transmitting end for The transmission port of the photo sensor; and a lens for concentrating the light to the sensing unit. The optical touch system of claim 10, wherein the substrate is Tin-doped Indium Oxide (ITO) glass. A photo sensor has a sensing unit and a lens, the sensing unit is configured to receive light to generate a light sensing signal, and the sensing unit has a transmitting end for Transmitting the light sensing signal, the lens is used to concentrate the light on the sensing unit, the light sensor is applied to an optical touch system, the optical touch system has a substrate, a display screen, and a a position calculation circuit, the substrate is glass, the display screen is transmitted through the substrate to display an image, and the position calculation circuit calculates a position of the indicator on the display screen according to the light sensing signal, the light sense The detector can be placed in a connector, the connector can transpose a light receiving direction of the light sensor, so that the light receiving direction of the light sensor is parallel to the substrate, and the light sensor can be The high-temperature process is avoided. The manufacturing method includes: filling a bottom filling adhesive between the sensing unit and a carrier member to fix the sensing unit to the bearing component; attaching the lens to the sensing unit; The sensing unit and the circumference of the lens Fill a fixing member to enclose the sensing unit and the lens. The method of claim 16, further comprising providing a shading element around the lens for shielding light that is not incident perpendicularly to the photo sensor. The manufacturing method of claim 16, further comprising coupling the transmission end of the sensing unit and the carrier element by surface adhesion technology. The method of claim 16, further comprising coupling the transmission end of the sensing unit to the carrier element by a wire bond. The method of claim 16, wherein the substrate is Tin-doped Indium Oxide (ITO) glass.