CN101509810A - Light source sensing system and testing method thereof - Google Patents

Abstract

A light source sensing system and a testing method thereof are provided. The light source sensing system comprises a light emitting diode sensing module, a bus conversion interface and a change-over switch module. The light emitting diode sensing module senses a light source generated by the light emitting diode and converts a sensing result into digital data. The bus conversion interface is a transmission type for converting digital data. The switch module controls the connection state between the bus conversion interface and the LED sensing module to transmit digital data.

Description

Light source sensing system and testing method thereof

technical field

The present invention relates to a light source sensing device and its testing method, and in particular to a light emitting diode light source sensing device and its testing method.

Background technique

After the mainboard is manufactured, a color identification instrument is usually used to test whether the light-emitting diodes on the mainboard emit light normally and whether the light color meets expectations, so as to determine whether the electronic components on the mainboard are operating normally. For example, it can be judged whether the operation of the hard disk is normal by sensing whether the light-emitting diode of the hard disk is emitting light normally.

The color identification instrument usually converts the light source signal into a voltage signal with a specific frequency, and then the test host reads the voltage signal and judges whether the value of the voltage signal is as expected, thereby judging whether the specific device is operating normally.

However, due to the high cost of color discrimination instruments, general system testers cannot purchase a large number of color discrimination instruments, so they cannot test a large number of LEDs at the same time. They can only test these LEDs in batches, prolonging the production time of motherboards and other devices , more waste of human resources.

Therefore, there is a need for a new light source sensing system that can automatically and efficiently test multiple LEDs to reduce production costs and save human resources.

Contents of the invention

Therefore, one aspect of the present invention is to provide a light source sensing system, which can automatically and effectively test a plurality of light-emitting diodes, reduce production costs and save human resources.

According to an embodiment of the present invention, the light source sensing system includes a light emitting diode sensing module, a bus conversion interface and a switch module. The light emitting diode sensing module senses the light sources generated by multiple light emitting diodes, and converts the sensing results into multiple sets of digital data. The bus conversion interface converts the transmission type of digital data. The switching module controls the connection state between the bus conversion interface and the LED sensing module, so as to transmit the digital data.

Therefore, another aspect of the present invention is to provide a light source testing method, which can automatically and effectively test a plurality of light emitting diodes, and automatically record the test results for user's reference, so as to save production cost and human resources.

According to another embodiment of the present invention, the light source testing method first selects at least one LED to be tested, and drives the LED to generate a light source. Then at least one sensor corresponding to the LED is driven to sense the light source generated by the LED. Then read the digital data stored by the sensor, and judge whether the light color of the light-emitting diode meets expectations based on the digital data.

According to the above-mentioned light source sensing system and its test method, the light-emitting diodes to be tested can be automatically selected, the light sources produced by multiple light-emitting diodes can be effectively sensed, and the test results can be recorded for future reference by users, so it can be effectively Test multiple light-emitting diodes, saving product production costs and human resources.

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.

Description of drawings

1 is a block diagram of a light source sensing system according to an embodiment of the present invention;

Fig. 2 is an online diagram of a switch and a sensor according to an embodiment of the present invention;

Fig. 3 is a flowchart of a light source testing method according to an embodiment of the present invention.

Among them, reference signs

101: Calculator 103: Bus conversion interface

105: Universal Serial Bus transmission line

107: Integrated circuit intermediary bus transmission line

109: Switch module 111: LED sensing module

115: Sensing device 117: Light emitting diode module

201: toggle switch 203: sensor

203a～203h: sensors 301～311: steps

Detailed ways

The light source sensing system and testing method thereof in the following embodiments can effectively sense the light sources generated by multiple light emitting diodes, automatically select the light emitting diode to be tested, and automatically record the test results of the corresponding light emitting diodes for use for future reference.

Please refer to FIG. 1 , which is a block diagram of a light source sensing system according to an embodiment of the present invention. The light source sensing system includes a sensing device 115 and a calculator 101 . Data is transmitted between the sensing device 115 and the calculator 101 through the USB transmission line 105 .

The sensing device 115 includes a light emitting diode sensing module 111, a switch module 109 and a bus conversion interface 103. This sensing device 115 senses the light source generated by the light emitting diode module 117, wherein the light emitting diode module 117 includes several light emitting diodes (not shown in the figure), the light sources generated by these LEDs are transmitted to the corresponding sensors of the LED sensing module 111 through several optical fiber cables 119 .

The LED sensing module 111 includes several color sensors, which sense the light source generated by the LED module 117, convert the sensing results into multiple sets of digital data, and store these digital data in the buffer memory of the sensor itself device. For example, if the sensor senses a certain color of red light emitted by the diode, the sensor will record the digital data (0~255) corresponding to this color of red light in its own red light register.

The switching module 109 controls the connection state between the LED sensing module 111 and the bus conversion interface 103 to transmit digital data. Since the switch module 109 has several switches, each switch corresponds to several sensors, and each switch controls the connection status between these sensors and the bus conversion interface 103 .

The calculator 101 controls the operation of the LED sensing module 111 and the switch module 109 to test the light source generated by the LED module 117 . The calculator 101 can first issue an instruction to adjust the state of the switch module 109. This instruction is transmitted to the switch by the calculator 101 through the universal serial bus transmission line 105, the bus conversion interface 103, and the integrated circuit intermediary bus transmission line (Inter Integrated Circuit Bus) 107. The switch module 109 is used to control the switching module 109 so that the corresponding sensors are connected to the bus conversion interface 103 first, and then an instruction is given to drive the corresponding sensors to sense the light source. By switching the switch module 109, the calculator 101 can drive all the sensors at one time to test the LEDs, or select some sensors to test the LEDs.

The bus conversion interface 103 (such as USB fixture v3.0) is responsible for converting the digital data into the required transmission format to facilitate transmission. In this embodiment, since the bus conversion interface 103 is externally connected to the calculator 101 through a universal serial bus transmission line (USB) 105, and internally connected to the switch module 109 through an integrated circuit intermediary bus transmission line 107, so the bus conversion The interface 103 needs to convert the digital data between the Universal Serial Bus type and the ICIntermediate bus type.

Please refer to FIG. 2 , which is a connection diagram of a switch and a sensor according to an embodiment of the present invention. In this embodiment of the present invention, the switch module 109 includes four switches 201 , and the connections between each switch 201 and the corresponding sensors 203 ( 203 a - 203 h ) are shown in FIG. 2 . Each switch 201 controls eight sensors (203a-203h), and the sensors 203a-203h receive the light source through the optical fiber cable. The eight sets of input/output ports SD0, SC0˜SD7, SC7 of the switch 201 are respectively connected to the input/output ports SDA, SCL of the sensors 203a˜203h. The input/output ports SDA_SW and SCL_SW of the switch 201 are IC bus connection ports, and the two connection ports are connected to the bus conversion interface through the IC bus transmission line.

When the computer needs to drive a specific sensor to sense the light source, for example, it needs to drive the sensor 203a, it will write a default value (such as 8'b00000001) to a specific I/O location (such as 0x70h). This write operation will connect the input/output ports SDA, SCL of the sensor 203a to SDA_SW, SCL_SW. After the input/output ports SDA and SCL of the sensor 203a are connected to SDA_SW and SCL_SW, the calculator can further drive the sensor 203a to receive light, and read the register of the sensor 203a after receiving the light, according to the digital data stored in the register of the sensor 203a (The value is 0x40~0xFF), to judge whether the light source of the corresponding light-emitting diode meets expectations.

Please refer to FIG. 3 , which is a flowchart of a light source testing method according to an embodiment of the present invention. The light source testing method first selects the LED to be tested (step 301), and drives the LED to generate a light source (step 303). Then drive the sensor corresponding to the LED to sense the light source generated by the LED (step 305 ). This step 305 is to adjust the switch state of the switch module to communicate with the corresponding sensor to sense the pre-tested LED. The detailed implementation steps include firstly adjusting the switch to connect the corresponding sensor with the calculator. After the connection, the instructions issued by the calculator can reach the corresponding sensor, and then drive the sensor to scan the light source. The sensor converts the scan result of the light source into digital data and stores it in its own register.

Next, read the digital data stored in the sensor (step 307 ). This reading step is to read the digital data stored in the sensor through the USB and the IC bus. Then, according to the digital data, it is judged whether the light color of the LED is as expected (step 309). In addition to the above steps, the above digital data can also be output to a record file for future reference by the user (step 311 ).

According to the above-mentioned light source sensing system and its test method, the light-emitting diodes to be tested can be automatically selected, the light sources generated by multiple light-emitting diodes can be effectively sensed, the manufacturing cost of the product is saved, the production cycle of the product is shortened, and the Record the test results of the corresponding LEDs for future reference by users.

Of course, the present invention can also have other various embodiments, and those skilled in the art can make various corresponding changes and deformations according to the present invention without departing from the spirit and essence of the present invention, but these corresponding Changes and deformations should belong to the scope of protection of the appended claims of the present invention.

Claims (10)

1. a light source sensing system is characterized in that, comprises:

One light-emitting diode sensing module, the light source that is produced with a plurality of light emitting diode of sensing, and sensing result is converted to many group digital datas;

One bus conversion interface is to change the transmission pattern of those numerical datas;

One switches switch module, is the connecting state between this bus conversion interface of control and this light-emitting diode sensing module, to transmit those numerical datas.

2. light source sensing system according to claim 1, it is characterized in that, wherein this change-over switch module comprises four change-over switches, and this light-emitting diode sensing module comprises 32 sensors, and each change-over switch is the connecting state between eight sensors of control and this bus conversion interface.

3. light source sensing system according to claim 1 is characterized in that, wherein this bus conversion interface is that those numerical datas are done conversion between universal serial bus pattern and integrated circuit intermediary bus pattern.

4. light source sensing system according to claim 1 is characterized in that, more comprises an integrated circuit intermediary bus transmission line, electrically connects this bus conversion interface and this change-over switch module, to transmit those numerical datas.

5. light source sensing system according to claim 1 is characterized in that, more comprises a Connectorized fiber optic cabling, so that the light source that those light emitting diodes were produced is conducted to this light-emitting diode sensing module.

6. light source sensing system according to claim 1 is characterized in that, more comprises a counter, and this counter is the operation of this light-emitting diode sensing module of control and this change-over switch module, carries out sensing to drive this light-emitting diode sensing module.

7. test of light source method in order to the test light source that light emitting diode produced, is characterized in that this method comprises:

Select at least one light emitting diode of institute's desire test;

Drive this light emitting diode to produce light source;

Drive and the corresponding at least one sensor of this light emitting diode the light source that is produced with this light emitting diode of sensing;

Read the stored at least one numerical data of this sensor;

According to this numerical data, whether that judges this light emitting diode photochromicly conforms with expection.

8. test of light source method according to claim 7 is characterized in that, wherein is the on off state that switches a switch module, comes this light emitting diode of sensing institute pretest to be communicated with corresponding this sensor.

9. test of light source method according to claim 7 is characterized in that, wherein is to see through a universal serial bus and an integrated circuit intermediary bus to read this stored numerical data of this sensor.

10. test of light source method according to claim 7 is characterized in that, more comprises to export this numerical data to record archives, for user's later reference.

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