TWI691213B - Portable device, display device and calibration method of display device - Google Patents

Abstract

A portable device including a proximity sensor, a communication module and a processor is provided. The proximity sensor is configured to sense a distance from the portable device to a display panel of a display device. The communication module is configured to communicate with the display device. The processor is coupled to the proximity sensor and the communication module, and configured to determine whether to activate a calibration procedure according to the distance sensed by the proximity sensor, and trigger the display device after the calibration procedure is activated in order to have the display panel display a test image. In addition, a display device and a calibration method of a display device are also provided.

Description

Portable device, display device and calibration method of display device

The invention relates to a display color correction technology, and in particular to a portable device, a display device and a correction method of the display device.

Due to the physical characteristics of each display unit in the display, the color of the screen displayed by the display will gradually deviate from the standard after a long period of use. At this time, the color correction of the display is required to correct the color deviation of the display. At present, most of the monitor color correction devices on the market are connected to a color correction device equipped with a photosensitive element through the Universal Serial Bus (USB). As long as it is matched with appropriate software or programs, the display can be calibrated. However, although the color calibration process using a commercially available monitor color corrector is quite simple, it requires additional high unit price hardware to assist.

In view of this, embodiments of the present invention provide a portable device, a display device, and a color correction method for a display device. The display device can be calibrated through cooperation between the portable device and the display device, and has high convenience and high accuracy.

A portable device according to an embodiment of the present invention includes a proximity sensor, a communication module, and a processor. The proximity sensor is used to sense the distance between the portable device and the display panel of the display device. The communication module is used to communicate with the display device. The processor is coupled to the proximity sensor and the communication module to determine whether to start the calibration process according to the distance sensed by the proximity sensor, and trigger the display device through the communication module after the calibration process is started to enable the display device The display panel displays the test image.

The calibration method of a display device according to an embodiment of the present invention is applicable to a portable device, and includes the following steps: sensing the distance between the portable device and the display panel of the display device; deciding whether to initiate calibration according to the sensed distance Process; and triggering the display device after starting the calibration process so that the display panel of the display device displays the test image.

A display device according to an embodiment of the invention includes a display panel, a communication module, and a processor. The display panel is used to display test images according to the display settings. The communication module is used to receive optical sensing data corresponding to the test image from the portable device. The processor is coupled to the display panel and the communication module, and is used to correct the display settings of the display panel according to the test image and the optical sensing data.

In order to make the above-mentioned features and advantages of the present invention more obvious and understandable, the embodiments are specifically described below in conjunction with the accompanying drawings for detailed description as follows.

FIG. 1 is a schematic diagram of a calibration method of a display device according to an embodiment of the invention; FIG. 2 is a schematic block diagram of a calibration system according to an embodiment of the invention.

1 and 2, the calibration system includes a portable device 100 and a display device 200, wherein the portable device 100 can be used as a calibration tool for the display device 200, and the portable device 100 and the display device 200 pass through the communication mode The group 130 and the communication module 230 cooperate to perform the calibration of the display device 200. Specifically, by bringing the portable device 100 close to the display panel 220 of the display device 200, the photosensitive device 150 such as an ambient light sensor or an image capturing device on the portable device 100 can be used to correct the display panel 220 The display settings are corrected such as color, gamma, or uniformity, but the invention is not limited to this.

For example, the portable device 100 may be a smart phone (smart phone), a tablet (tablet), a personal digital assistant (Personal Digital Assistant, PDA), a handheld game console, etc. equipped with a proximity sensor (proximity sensor) ) 120, the communication module 130, and the above-mentioned electronic devices such as the ambient light sensor or the image capturing device to calibrate the photosensitive element 150. The present invention does not limit the specific type of the portable device 100 here. Therefore, through the portable device 100, the user does not need to additionally purchase a dedicated color corrector for the display device 200, which improves convenience.

In order to avoid the interference of other light in the environment and affect the accuracy during calibration, the embodiment of the present invention uses the proximity sensor 120 provided on the portable device 100 to sense the proximity sensor 120 and the display panel 220 The distance d between them, and the calibration process will be started when the distance d is less than the preset distance. In the calibration process, the portable device 100 triggers the display device 200, and the display device 200 displays the test image through the display panel 220 after being triggered. Subsequently, the portable device 100 obtains the optical sensing data corresponding to the test image by calibrating the photosensitive element 150. The proximity sensor 200 of the portable device 100 is used to start the calibration process, so that the optical sensing data will not include or include little ambient light interference, which can improve the accuracy of the calibration.

Several embodiments will be described below to explain how the portable device 100 and the display device 200 cooperate to perform the calibration method of the display device 200.

First embodiment

2 is a schematic block diagram of a calibration system according to an embodiment of the invention.

Please refer to FIG. 2. In this embodiment, the portable device 100 includes a processor 110 and a proximity sensor 120 coupled to the processor 110, a communication module 130, a storage element 140, and a calibration photosensitive element 150.

The processor 110 is responsible for the overall operation of the portable device 100. For example, the processor 110 may be a central processing unit (Central Processing Unit, CPU), or other programmable general-purpose or special-purpose microprocessor (Microprocessor), digital signal processor (Digital Signal Processor, DSP) ), programmable controller, application specific integrated circuits (ASIC), programmable logic device (Programmable Logic Device, PLD) or other similar devices or combinations of these devices, etc., the invention is not here Set limits.

The proximity sensor 120 is used to obtain sensing data that can reflect the distance d from the display panel 220. For example, the proximity sensor 120 may be a sensor that detects an object close to a predetermined detection surface or a nearby object without mechanical contact by using the force of electromagnetic field or infrared light, such as a transmissive photoelectric inductor Sensor (transmission type photoelectric sensor), direct reflection type photoelectric sensor (direct reflection type photoelectric sensor), mirror reflection type photoelectric sensor (mirror reflection type photoelectric sensor), high-frequency oscillation type proximity sensor (high frequency oscillation type proximity sensor), capacitive proximity sensor (capacitance type proximity sensor), magnetic proximity sensor (magnetic type proximity sensor), infrared light proximity sensor (infrared light proximity sensor) or a combination of these devices, The invention is not limited here.

The communication module 130 is used to communicate with the display device 200, so it can be any wired or wireless interface module compatible with the communication module 230 of the display device 200. For example, the communication module 130 may adopt a wired communication interface such as a cable, a universal serial bus (USB), a thunderbolt, a controller area network (CAN), and a recommended standard (RS ) 232, recommended standard (RS) 422 and other interfaces, universal asynchronous receiver/transmitter (UART), serial peripheral interface bus (SPI), or wireless communication interface such as wireless sensor Test network (eg, EnOcean, Bluetooth, ZigBee), cellular network (2G/3G/Long Term Evolution (LTE)/5G), wireless LAN (eg, wireless LAN) (WLAN), Global Interoperability for Microwave Connections (WiMAX), short-range point-to-point communication (eg, radio frequency identification (RFID), EnOcean, near field communication (NFC)), wireless fidelity network (Wireless Fidelity, WiFi), etc., The invention is not limited here.

The storage element 140 is used to store data. For example, the storage device 140 may be a fixed or mobile random access memory (RAM), read-only memory (ROM), flash memory, or any form of hard disk Or a combination of these devices, the invention is not limited here.

The calibration photosensitive element 150 is used to obtain optical sensing data corresponding to the test image IMG from the display panel 220 displaying the test image IMG during the calibration process. For example, the calibration photosensitive element 150 may include an image capture device (for example, a camera) and an ambient light sensor (Ambient Light Sensor, ALS), where the image capture device may be used to obtain an RGB image corresponding to the test image IMG The ambient light sensor can be used to obtain the brightness value corresponding to the test image IMG. In particular, on the portable device 100, the calibration photosensitive element 150 and the proximity sensor 120 are disposed at adjacent positions. Therefore, the distance d sensed by the proximity sensor 120 can also be regarded as correcting the distance between the photosensitive element 150 and the display panel 220.

On the other hand, the display device 200 includes a processor 210, a display panel 220 coupled to the processor 210, a communication module 230, and a non-volatile memory (NVM) 240. The processor 210 is used to display the test image IMG on the display panel 220. For example, the processor 210 includes a scaler and a micro controller unit (MCU). However, the present invention is not limited to this, and the processor 210 may further include other processing units with computing capabilities such as a central processing unit. The display panel 220 is used to display the test image IMG according to the display settings. For example, the display panel 220 may be a liquid crystal display (Liquid-Crystal Display, LCD), a light-emitting diode (LED), an organic light-emitting diode (Organic Light-Emitting Diode, OLED), etc. The display screen displays the test image IMG according to display settings such as a 3D Lookup Table (LUT) recorded in the non-volatile memory 240, but the invention is not limited thereto. The communication module 230 is used to communicate with the portable device 100, so it can be any wired or wireless interface module compatible with the communication module 130 of the portable device 100. For example, the communication module 230 may use a wired communication interface such as a cable, a universal serial bus (USB), a thunderbolt, a controller area network (CAN), and a recommended standard (RS ) 232, recommended standard (RS) 422 and other interfaces, universal asynchronous receiver/transmitter (UART), serial peripheral interface bus (SPI), or wireless communication interface such as wireless sensor Test network (eg, EnOcean, Bluetooth, ZigBee), cellular network (2G/3G/Long Term Evolution (LTE)/5G), wireless LAN (eg, wireless LAN) (WLAN), Global Interoperability for Microwave Connections (WiMAX), short-range point-to-point communication (eg, radio frequency identification (RFID), EnOcean, near field communication (NFC)), wireless fidelity network (Wireless Fidelity, WiFi), etc., The invention is not limited here. The non-volatile memory 240 is used to record the display settings of the display panel 220. For example, the non-volatile memory 240 may be read-only memory (ROM), flash memory, any form of hard disk, or a combination of these devices, and a display look-up table LUT is recorded, but The invention is not limited to this.

In this embodiment, the storage element 140 of the portable device 100 stores one or more test images IMG. The test image IMG is an image that the display panel 220 of the display device 200 needs to display during the calibration process. However, it should be noted that the present invention does not limit the image content of the test image IMG here. After opening the calibration application, the portable device 100 will sense the distance d from the display panel 220 of the display device 200 through the proximity sensor 120, and then start the calibration when the distance d is less than the preset distance Process.

In this embodiment, in the calibration process, the portable device 100 sends the test image IMG to the display device 200 through the signal S _IMG to trigger the display device 200, and the display device 200 displays the received data through the display panel 220. Test image IMG. Then, the portable device 100 uses the calibration sensor 150 to obtain the optical sensing data corresponding to the test image IMG, and the processor 110 calculates the adjustment scheme of the display settings of the display panel 220 according to the test image IMG and the optical sensing data . Next, 100 through a signal S _C will be calculated to the adjustment program the portable device to the display apparatus 200, and adjusts the display device 200 will display panel 220 according to the display setting adjustment programs received (e.g., updating the display Lookup table LUT).

The adjustment scheme of the display setting can be calculated not only by the processor 100 of the portable device 100 but also by a cloud computing host (not shown). In detail, in this embodiment, the portable device 100 can also upload the test image IMG and the optical sensing data to the cloud computing host (for example, through the communication module 130). The cloud computing host can calculate the adjustment scheme of the display settings of the display panel 220 through algorithms such as artificial intelligence. In this way, it can compensate for the disadvantage that the calibration photosensitive element 150 of the portable device 100 may not be as accurate as the dedicated calibration tool.

Second embodiment

FIG. 3 is a schematic block diagram of a calibration system according to an embodiment of the invention.

The components of the portable device 100 and the display device 200 of this embodiment are the same or similar to the first embodiment, so they will not be repeated here.

Please refer to FIG. 3. In this embodiment, the storage element 140 of the portable device 100 stores one or more test images IMG. The test image IMG is an image that the display panel 220 of the display device 200 needs to display during the calibration process. However, it should be noted that the present invention does not limit the image content of the test image IMG here. After opening the calibration application, the portable device 100 senses the distance d from the display panel 220 of the display device 200 through the proximity sensor 120, and then starts the calibration process when the distance d is less than the preset distance.

In this embodiment, in the calibration process, the portable device 100 sends the test image IMG to the display device 200 through the signal S _IMG to trigger the display device 200, and the display device 200 displays the received data through the display panel 220. Test image IMG. Then, the portable device 100 uses the calibration photosensitive element 150 to obtain the optical sensing data corresponding to the test image IMG, and sends the optical sensing data to the display device 200 through the signal S _DATA . Next, the processor 210 of the display device 200 calculates the adjustment scheme of the display panel 220 according to the test image IMG and the optical sensing data, and adjusts the display settings of the display panel 220 according to the calculated adjustment scheme (for example, updating the display search Table LUT).

Third embodiment

4 is a schematic block diagram of a calibration system according to an embodiment of the invention.

The components of the portable device 100 and the display device 200 of this embodiment are the same or similar to the first embodiment, so they will not be repeated here.

Referring to FIG. 4, in this embodiment, the non-volatile memory 240 of the display device 200 stores one or more test images IMG. The test image IMG is an image that the display panel 220 of the display device 200 needs to display during the calibration process. However, it should be noted that the present invention does not limit the image content of the test image IMG here. After opening the calibration application, the portable device 100 senses the distance d from the display panel 220 of the display device 200 through the proximity sensor 120, and then starts the calibration process when the distance d is less than the preset distance.

In the present embodiment, in the correction process, the portable apparatus 100 will be triggered, for example, the display device 200 through the trigger signal S _T, the display device is triggered trigger signal S _T 200 is displayed through the display panel 220 in the non-volatile recording The test image IMG in the sexual memory 240. Then, the portable device 100 uses the calibration sensor 150 to obtain the optical sensing data corresponding to the test image IMG, and the processor 110 calculates the adjustment scheme of the display settings of the display panel 220 according to the test image IMG and the optical sensing data . Next, 100 through a signal S _C will be calculated to the adjustment program the portable device to the display apparatus 200, and adjusts the display device 200 will display panel 220 according to the display setting adjustment programs received (e.g., updating the display Lookup table LUT).

The adjustment scheme of the display setting can be calculated not only by the processor 100 of the portable device 100 but also by a cloud computing host (not shown). In detail, in this embodiment, the portable device 100 can also upload the test image IMG and the optical sensing data to the cloud computing host (for example, through the communication module 130). The cloud computing host can calculate the adjustment scheme of the display settings of the display panel 220 through algorithms such as artificial intelligence. In this way, it can compensate for the disadvantage that the calibration photosensitive element 150 of the portable device 100 may not be as accurate as the dedicated calibration tool.

Fourth embodiment

5 is a schematic block diagram of a calibration system according to an embodiment of the invention.

The components of the portable device 100 and the display device 200 of this embodiment are the same or similar to the first embodiment, so they will not be repeated here.

Please refer to FIG. 5. In this embodiment, the non-volatile memory 240 of the display device 200 stores one or more test images IMG. The test image IMG is an image that the display panel 220 of the display device 200 needs to display during the calibration process. However, it should be noted that the present invention does not limit the image content of the test image IMG here. After opening the calibration application, the portable device 100 senses the distance d from the display panel 220 of the display device 200 through the proximity sensor 120, and then starts the calibration process when the distance d is less than the preset distance.

In the present embodiment, in the correction process, the portable apparatus 100 will be triggered, for example, the display device 200 through the trigger signal S _T, the display device is triggered trigger signal S _T 200 is displayed through the display panel 220 in the non-volatile recording The test image IMG in the sexual memory 240. Then, the portable device 100 uses the calibration photosensitive element 150 to obtain the optical sensing data corresponding to the test image IMG, and sends the optical sensing data to the display device 200 through the signal S _DATA . Next, the processor 210 of the display device 200 calculates the adjustment scheme of the display panel 220 according to the test image IMG and the optical sensing data, and adjusts the display settings of the display panel 220 according to the calculated adjustment scheme (for example, updating the display search Table LUT).

In some embodiments, the display panel 220 of the display device 200 will have multiple test images IMG, and the portable device 100 will use the calibration photosensitive element 150 to obtain multiple pieces of optical sensing data corresponding to the multiple test images IMG. Then, the portable device 100, the display device 200, or the cloud computing host then calculates an adjustment scheme based on the multiple test images IMG and the corresponding multiple optical sensing data to adjust the display settings of the display panel 220 .

In some embodiments, the display panel 220 of the display device 200 can also display one test image IMG at a time, and the portable device 100 uses the calibration photosensitive element 150 to obtain a piece of optical sensing data corresponding to the displayed test image IMG . Then, the portable device 100, the display device 200, or the cloud computing host then calculates an adjustment scheme based on the test image IMG and the corresponding optical sensing data to adjust the display settings of the display panel 220 accordingly. Next, the display panel 220 of the display device 200 displays the next test image IMG, and the portable device 100 uses the calibration photosensitive element 150 to obtain a piece of optical sensing data corresponding to the displayed test image IMG. Then, the portable device 100, the display device 200, or the cloud computing host then calculates an adjustment scheme according to the displayed test image IMG and its corresponding optical sensing data, and then adjusts the display settings of the display panel 220 again according to By analogy, until all test images IMG have been displayed.

In some embodiments, the display panel 220 of the display device 200 can display multiple identical or different test images IMG in different positions, and the portable device 100 uses the calibration photosensitive element 150 to obtain the corresponding multiple test images IMG's multiple optical sensing data. Then, the portable device 100, the display device 200, or the cloud computing host will calculate the adjustment scheme based on the multiple test images IMG and the corresponding multiple optical sensing data, and the display positions of the multiple test images IMG, to Accordingly, the display settings of the display panel 220 are adjusted. According to this, the uniformity of the display panel 220 can be corrected.

In some embodiments, the user can set the adjustment target of the display panel 220 through the calibration application of the portable device 100, for example, to set the RGB three points in the color space, etc., while the portable device 100. The display device 200 or the cloud computing host will also calculate according to this adjustment target when calculating the adjustment plan.

In some embodiments, the display settings of the display panel 220 may also be corrected according to the image capture device of the portable device 100, for example, the gamma curve or color response of the display panel 220 and the image capture of the portable device 100 Synchronize with the device.

For example, the display panel 220 displays multiple different test images IMG. For each test image IMG, the image capture device of the portable device 100 will capture a corresponding RGB image, and the display panel 220 must adjust the display settings so that each test image IMG corresponds to the corresponding RGB image. For example, when the R values of the test image IMG are 32, the display settings of the display panel 220 must be adjusted (for example, to adjust the RGB gain value) to the R value of the RGB image captured by the image capturing device of the portable device 100 32; When the R value of the test image IMG is 255, the display settings of the display panel 220 must be adjusted (for example, to adjust the RGB gain value) to the R value of the RGB image captured by the image capture device of the portable device 100 255, and so on. It should be noted that although the above example is for adjusting the R value, the present invention is not limited to this, and the adjustment may also be for one or more other values, for example, for the Y value or for the RGB value.

Accordingly, when there is a need to use the image capture device of the portable device 100 to capture the display content of the display panel 220, the image capture device of the portable device 100 will be able to capture all the images displayed on the display panel 220. detail.

FIG. 6 is a flowchart of a calibration method of a display device according to an embodiment of the invention. The steps of the calibration method of this embodiment will be described with reference to various components of the portable device 100 in FIGS. 1 to 5. It must be noted that the details of the steps that have been explained in the foregoing embodiments will not be repeated in the following.

6, first, the proximity sensor 120 of the portable device 100 will sense the distance d from the display panel 220 of the display device 200 (step S610), and then the processor 110 will determine whether the distance d is less than the preset Distance (step S620). If the distance d is not less than the preset distance, the subsequent correction process is not started and the distance d is continuously sensed (step S610). On the other hand, if the distance d is less than the preset distance, the calibration process is started (step S630). During the calibration process, the portable device 100 will trigger the display device 200 through the communication module 130 to cause the display panel 220 to display the test image IMG.

7 is a flowchart of a calibration method of a display device according to an embodiment of the invention. The steps of the calibration method of this embodiment will be described with reference to various components of the portable device 100 in FIGS. 1 to 5. It must be noted that the details of the steps that have been explained in the foregoing embodiments will not be repeated in the following.

In order to avoid the accuracy of the portable device 100 moving during the calibration process, the portable device 100 of this embodiment also uses the proximity sensor 120, the ambient light sensor, and/or acceleration sensing during the calibration process (Not shown) to ensure the accuracy of calibration.

Please refer to FIG. 7. In this embodiment, the portable device 100 will detect whether the portable device 100 has moved during the calibration process (step S640 ). For example, the portable device 100 may use the proximity sensor 120 or the acceleration sensor to determine whether the portable device 100 has moved.

If the portable device 100 does not detect movement, the portable device 100 will further determine whether the ambient light intensity is stable (step S650). For example, the portable device 100 may utilize an ambient light sensor to sense the ambient light intensity. If the variation range of the ambient light intensity within the preset time is not greater than the preset threshold, the ambient light intensity is determined to be stable; otherwise, if the variation range of the ambient light intensity within the preset time is greater than the preset threshold, the ambient light is determined The intensity is unstable.

If the portable device 100 detects movement or determines that the ambient light intensity is unstable, it will suspend the calibration process (step S690). For example, when the portable device 100 detects movement or determines that the ambient light intensity is unstable, it can send a notification signal that the calibration process is suspended to the display device 200 through the communication module 130, so that the display panel 220 of the display device 200 A warning is displayed. When the calibration process is suspended, the display device 200 does not adjust the display settings of the display panel 220.

If the portable device 100 does not detect movement and determines that the ambient light intensity is stable, the calibration sensor 150 is used to obtain optical sensing data corresponding to the test image IMG (step S660).

After obtaining the optical sensing data corresponding to the test image IMG, the portable device 100 determines whether there is an undisplayed test image IMG (step S670). If yes, the portable device 100 triggers the display device 200 to make the display panel 220 display the next test image IMG (step S675), and then continues the calibration process. On the contrary, if all test images IMG have been displayed, the display setting of the display panel 220 will be corrected according to all test images IMG and their corresponding optical sensing data (step S680).

In summary, the portable device, the display device, and the display device calibration method proposed by the embodiments of the present invention use the proximity sensor on the portable device to start the calibration process when the distance to the display panel is sufficiently close . In the calibration process, the portable device triggers the display device to cause the display panel of the display device to display the test image, and uses an image capture device and/or ambient light sensor on the portable device to calibrate the photosensitive element to obtain Corresponding to the optical sensing data of the test image. In this way, the display settings of the display panel can be corrected based on the test image and optical sensing data. According to this, the user can use a portable device to calibrate the display device without additionally purchasing an expensive dedicated color corrector, which greatly improves convenience. In addition, the accuracy of correction can be improved by using proximity sensors on the portable device.

Although the present invention has been disclosed as above with examples, it is not intended to limit the present invention. Any person with ordinary knowledge in the technical field can make some changes and modifications without departing from the spirit and scope of the present invention. The scope of protection of the present invention shall be subject to the scope defined in the appended patent application.

100: portable device 110, 210: processor 120: proximity sensor 130, 230: communication module 140: storage element 200: display device 220: display panel 240: non-volatile memory d: distance S610, S620 , S630, S640, S650, S660, S670, S675, S680, S690: steps of the calibration method of the display device S _c , S _DATA , S _IMG , S _T : signal

FIG. 1 is a schematic diagram of a calibration method of a display device according to an embodiment of the invention. 2 is a schematic block diagram of a calibration system according to an embodiment of the invention. FIG. 3 is a schematic block diagram of a calibration system according to an embodiment of the invention. 4 is a schematic block diagram of a calibration system according to an embodiment of the invention. 5 is a schematic block diagram of a calibration system according to an embodiment of the invention. FIG. 6 is a flowchart of a calibration method of a display device according to an embodiment of the invention. 7 is a flowchart of a calibration method of a display device according to an embodiment of the invention.

100: portable device

200: display device

220: display panel

d: distance

Claims (17)

A portable device includes: a proximity sensor to sense a distance between the portable device and a display panel of a display device; a communication module to communicate with the display device; And a processor, coupled to the proximity sensor and the communication module, for deciding whether to start a calibration process according to the distance, and after starting the calibration process to trigger the display device through the communication module to enable the The display panel displays a test image; a calibration photosensitive element, coupled to the processor, is used to obtain an optical sensing data corresponding to the test image, and transmit the optical sensing data to the display through the communication module The device, wherein the calibration process includes: the display device adjusting the display settings of the display device so that the test image is consistent with the optical sensing data. The portable device as described in item 1 of the patent application scope, wherein the processor is further used to generate a correction signal according to the test image and the optical sensing data, and send the correction signal to the display through the communication module Device. The portable device as described in item 1 of the patent application scope, wherein the processor is further used to send the optical sensing data to the display device through the communication module. The portable device as described in item 1 of the patent scope, wherein the communication module receives a request signal from the display device, and the processor determines a data type of the optical sensing data according to the data request. The portable device as described in item 1 of the patent application scope, wherein the calibration photosensitive element includes an image capturing device for acquiring an RGB image corresponding to the test image. The portable device as described in item 1 of the patent application range, wherein the calibration photosensitive element includes an ambient light sensor for obtaining a brightness value corresponding to the test image. The portable device as described in item 1 of the patent scope, wherein the processor is further used to send the test image to the display device through the communication module, so that the display panel displays the test image. The portable device as described in item 1 of the patent application scope, wherein the processor starts the calibration process when determining that the distance is less than a preset distance. A calibration method for a display device is suitable for a portable device. The calibration method includes: sensing a distance from a display panel of the display device; determining whether to initiate a calibration process according to the distance; and After the calibration process, the display device is triggered to cause the display panel to display a test image; obtaining an optical sensing data corresponding to the test image, wherein the calibration process includes: the display device adjusting the display settings of the display device so that the The test image is consistent with the optical sensing data. The calibration method as described in item 9 of the patent application scope further includes: generating a calibration signal based on the test image and the optical sensing data; and Send the calibration signal to the display device. The calibration method described in item 9 of the patent application scope further includes: sending the optical sensing data to the display device. The calibration method as described in item 9 of the patent application scope, wherein the step of obtaining the optical sensing data corresponding to the test image includes: receiving a request signal from the display device; and determining the optical sensing data according to the request signal One data type. The calibration method as described in item 9 of the patent application scope, wherein the step of obtaining the optical sensing data corresponding to the test image includes: obtaining an RGB image corresponding to the test image. The calibration method as described in item 9 of the patent application scope, wherein the step of obtaining the optical sensing data corresponding to the test image includes: obtaining a brightness value corresponding to the test image. The calibration method as described in item 9 of the patent application scope, wherein the step of triggering the display device to cause the display panel to display the test image after starting the calibration process includes sending the test image to the display device to cause the display The panel displays the test image. The calibration method as described in item 9 of the patent application scope, wherein the step of deciding whether to start the calibration process according to the distance includes: determining whether the distance is less than a preset distance; and starting the process when determining that the distance is less than the preset distance Calibration process. A display device includes: a display panel for displaying a test image according to a display setting; a communication module for receiving optical sensing data corresponding to the test image from a portable device; and a processor, Coupled to the display panel and the communication module, for correcting the display settings so that the test image is consistent with the optical sensing data; and a non-volatile memory for storing the test image, wherein the communication mode The group receives a trigger signal from the portable device, and in response to the trigger signal, the display panel displays the test image in the non-volatile memory according to the display setting.

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