TWI699687B - Mobile device and sleep wake-up method - Google Patents

Abstract

A mobile device includes: an application processor; a display driving circuit coupled between the application processor and a display panel; a fingerprint recognition circuit coupled between the application processor and a fingerprint sensor; and A touch circuit is coupled between the application processor and a touch sensor for waking up the display driving circuit and the touch sensor after detecting a finger pressing operation on the touch sensor Fingerprint recognition circuit, so that the display driving circuit displays a pre-stored fingerprint input prompt image in a partial area on the display panel, and makes the fingerprint recognition circuit collect a fingerprint image, and then wake up the application processor to execute A fingerprint recognition program.

Description

Mobile device and sleep wake-up method

The invention relates to a mobile device, in particular to a mobile device that can wake up a display driving circuit and a fingerprint recognition circuit first.

With the development of technology, various mobile devices can be seen everywhere in people's daily lives, such as mobile phones, notebook computers, tablet computers, POS (point of sale) devices, and on-board computers. At present, most mobile devices include a touch display screen, and most mobile devices can lock the screen through fingerprint recognition to protect the privacy of users.

Existing mobile devices use a fingerprint recognition module embedded under the screen or a fingerprint recognition module integrated in the mobile device for device unlocking, mobile payment and identity recognition. Generally speaking, when a mobile device sleeps, it allows the touch circuit (Touch IC) to detect whether there is a fingerprint input on the screen through a touch sensor (TP Sensor) in a low power consumption mode. If fingerprint input is detected, the touch circuit will wake up the application processor (AP) through an interrupt signal; after the application processor is woken up, it will read the touch circuit provided by the integrated circuit bus (IIC) The finger press position information; after receiving the finger press position information, the application processor will wake up the Display Driver IC and the fingerprint identification circuit (Fingerprint IC) to start the power-on action; after the power-on action is completed, the application process The device then sends the location information and instructions to the display driver chip and fingerprint recognition circuit through the mobile industry processor interface (MIPI) and serial peripheral interface (SPI) respectively to identify whether the fingerprint on the screen is correct or not. Procedures such as device unlocking, mobile payment or personal identification.

However, the aforementioned mobile device wake-up solution makes users wait a long time.

In order to solve the above-mentioned problems, a novel screen wake-up solution is urgently needed in this field. To

The object of the present invention is to provide a screen wake-up method, which can wake up the display driving circuit and the fingerprint recognition circuit first when the screen of the mobile device is sleeping.

To achieve the above purpose, a mobile device has been proposed, which has:

An application processor;

A display driver circuit, coupled between the application processor and a display panel;

A fingerprint recognition circuit (fingerprint recognition circuit), coupled between the application processor and a fingerprint sensor; and

A touch detection circuit, coupled between the application processor and a touch sensor, is used to wake up the touch sensor after detecting a finger pressing operation on the touch sensor The display driving circuit and the fingerprint recognition circuit enable the display driving circuit to display a pre-stored fingerprint input prompt image in a partial area on the display panel, and the fingerprint recognition circuit collects a fingerprint image, and then wakes up the The application processor executes a fingerprint recognition program.

In one embodiment, the touch circuit wakes up the fingerprint recognition circuit through an integrated circuit bus (IIC); the touch circuit uses a general-purpose input and output interface (GPIO) or a serial peripheral interface (SPI) The display driving circuit is awakened; and the touch control circuit transmits an interrupt signal to the application processor to awaken the application processor.

In an embodiment, the local area is a fixed area or any area of the display panel.

In one embodiment, the pre-stored fingerprint input prompt image is stored in a flash memory.

In one embodiment, the fingerprint recognition circuit and the fingerprint sensor are integrated into a fingerprint sensor chip.

In one embodiment, the application processor reads a pressing position of the finger pressing operation through the interrupt signal, and reads the fingerprint image collected by the fingerprint recognition circuit according to the pressing position to execute the fingerprint Identification procedure.

In addition, the present invention also provides a sleep wake-up method, which is applied to a mobile device. The mobile device has: an application processor; a display driving circuit coupled between the application processor and a display panel; A fingerprint recognition circuit is coupled between the application processor and a fingerprint sensor; and a touch circuit is coupled between the application processor and a touch sensor. The method is characterized by including:

After the touch circuit detects a finger pressing operation on the touch sensor, it first wakes up the display drive circuit and the fingerprint recognition circuit, so that the display drive circuit is located in a local area of the display panel A pre-stored fingerprint input prompt image is displayed, and the fingerprint recognition circuit collects a fingerprint image, and then wakes up the application processor to execute a fingerprint recognition program.

In one embodiment, the touch circuit wakes up the fingerprint recognition circuit through an integrated circuit bus; the touch circuit wakes up the display driving circuit through a universal input and output interface or a sequence of peripheral interfaces; and the touch The control circuit awakens the application processor by sending an interrupt signal to the application processor.

In an embodiment, the local area is a fixed area or any area of the display panel.

In one embodiment, the application processor reads a pressing position of the finger pressing operation through the interrupt signal, and reads the fingerprint image collected by the fingerprint recognition circuit according to the pressing position to execute the fingerprint Identification procedure.

In order to enable your reviewer to further understand the structure, features and purpose of the present invention, drawings and detailed descriptions of preferred specific embodiments are attached as follows.

Please refer to FIG. 1, which shows a block diagram of an embodiment of the mobile device of the present invention. As shown in FIG. 1, a mobile device 100 includes an application processor 110, a display drive circuit 120, a fingerprint recognition circuit 130, a touch circuit 140, a display panel 150, a fingerprint sensor 160, and a touch sensor.器170.

The application processor 110 is the central control unit of the mobile device 100; the display drive circuit 120 is coupled between the application processor 110 and the display panel 150, and is used to transmit images and data signals to the display panel 150 for a screen Characters and images are displayed on the screen, where the display panel 150 can be a display panel such as LCD or OLED.

The fingerprint recognition circuit 130 is coupled between the application processor 110 and the fingerprint sensor 160. In operation, the fingerprint recognition circuit 130 collects a fingerprint image through the fingerprint sensor 160, and the processor 110 performs a fingerprint recognition process. The fingerprint sensor 160 can be a capacitive, optical or ultrasonic fingerprint sensor according to the collection technology, and the fingerprint input method can be a sliding type or a pressing type. In addition, the fingerprint recognition circuit 130 and the fingerprint sensor 160 can be integrated into a fingerprint sensor IC (Fingerprint sensor IC).

The touch circuit 140 is coupled between the application processor 110 and the touch sensor 170, and is used to wake up the display driving circuit 120 and the fingerprint after detecting a finger pressing operation on the touch sensor 170 The recognition circuit 130 enables the display driving circuit 120 to display a pre-stored fingerprint input prompt image in a partial area on the display panel 150, and enables the fingerprint recognition circuit 130 to collect a fingerprint image, and then wakes the application processor 110 to execute A fingerprint recognition program, wherein the local area can be a fixed area or any area of the display panel 150; and the pre-stored fingerprint input prompt image can be stored in a flash memory.

Specifically, the touch circuit 140 measures a change in a sensed value through the touch sensor 170 to calculate a finger pressing position. After the display driving circuit 120 and the fingerprint recognition circuit 130 are awakened, the display driving circuit 120 displays a pre-stored fingerprint input prompt image through the display panel 150, and the fingerprint recognition circuit 130 collects a fingerprint image through the fingerprint sensor 160. After that, the touch circuit 140 transmits an interrupt signal INT to the application processor 110 to wake up the application processor 110, so that the application processor 110 reads the finger pressing position, and reads the fingerprint recognition circuit 130 according to the finger pressing position The fingerprint image is collected to execute the fingerprint identification program, so as to determine whether the fingerprint image is correct.

After the application processor 110 determines whether the fingerprint image is correct, it can perform operations such as device unlocking, mobile payment, or personal privacy identification.

In addition, the fingerprint sensor 160 generally uses an off-screen fingerprint recognition technology, and its types mainly include optical (Optical), ultrasonic (Ultrasonic), and full-screen recognition solutions (Display Fingerprint Solution; DFS).

The optical under-screen fingerprint recognition technology is mainly to arrange the optical sensor under the screen, illuminate the fingerprint with a light source (including infrared light source or OLED light source or LED light source), and then use the interference fringes of the fingerprint's reentrant light to identify the fingerprint path . In practical applications, the wake-up time of the application processor 110 is generally about 50~500ms; the display driving circuit 120 requires a minimum of 100ms to display the unlocked image on the screen; and the fingerprint collection process (including exposure, charge accumulation and image The time required for steps such as reading is about 200ms. Therefore, the total unlocking time of the conventional optical under-screen fingerprint technology is about 700-800 ms; and the technical solution of the present invention can greatly shorten the total unlocking time.

In addition, the fingerprint recognition technology under the ultrasonic recognition screen is mainly to scan the finger through the ultrasonic wave of the specific frequency emitted by the fingerprint module, using the difference in the absorption, reflection and penetration of the finger texture and other materials on the sound wave, and the ridge and valley of the fingerprint. Location for identification. Due to the longer time required for an ultrasonic scan and the higher power consumption, the current ultrasonic fingerprint recognition technology faces the same problem as the optical fingerprint recognition technology, that is, the overall unlocking speed is relatively slow; and the technical solution according to the present invention can be greatly reduced Total unlock time.

In addition, the general full-screen fingerprint recognition method under the screen can support half-screen or full-screen recognition, and can support multi-region and multi-fingerprint applications. At present, the main solution for full-screen fingerprint recognition is the off-chip solution, that is, the fingerprint sensor is integrated on the screen, and the control chip is bonded by chip on film (COF). Go to the screen to collect fingerprint image data. Since the fingerprint area collected by the full-screen fingerprint recognition solution is not fixed, the application processor 110 needs to be based on optical fingerprints, and also needs to calculate the finger position area and send the finger position based on the finger coordinates reported by the application processor 110 Information to the display driving circuit 120. Therefore, the overall unlocking speed of current general full-screen fingerprint recognition technology is relatively slow; and the technical solution of the present invention can greatly shorten the total unlocking time.

Based on the above description, the present invention further provides a sleep wake-up method. Please refer to FIG. 2, which shows a flowchart of an embodiment of the sleep wake-up method of the present invention. The sleep wake-up method is applied to a mobile device (such as the aforementioned mobile device 100), wherein the mobile device has an application processor, a display driving circuit, a fingerprint recognition circuit and a touch circuit; the display driving circuit Is coupled between the application processor and a display panel; the fingerprint recognition circuit is coupled between the application processor and a fingerprint sensor; and the touch circuit is coupled between the application processor and a touch Between the control sensors.

As shown in Figure 2, the sleep wake-up method includes the following steps:

Step S201: After the touch circuit detects a finger pressing operation on the touch sensor, it first wakes up the display driving circuit and the fingerprint recognition circuit, so that the display driving circuit displays a pre-stored in a partial area on the display panel The fingerprint input prompt image of, wherein the local area is a fixed area or any area of the display panel.

In addition, the touch circuit wakes up the fingerprint recognition circuit through an integrated circuit bus IIC, wakes up the display drive circuit through a general-purpose input/output GPIO interface or a serial peripheral interface SPI, and transmits an interrupt signal INT to The application processor wakes up the application processor.

Step S202: Make the fingerprint recognition circuit collect a fingerprint image and then wake up the application processor to execute a fingerprint recognition program, wherein the application processor reads a pressing position of the finger pressing operation through the interrupt signal INT, and follows The pressing position reads the fingerprint image collected by the fingerprint recognition circuit to execute the fingerprint recognition procedure.

With the design disclosed above, the present invention has the following advantages:

1. It can effectively shorten the sleep and wake-up time of a mobile device;

2. It can effectively shorten the unlocking time of a mobile device in the technical solution of fixed screen fingerprint detection position; and

3. It can effectively shorten the unlocking time of a mobile device in the technical solution of full-screen fingerprint detection.

The disclosure in this case is a preferred embodiment, and any partial changes or modifications that are derived from the technical ideas of the case and can be easily inferred by those familiar with the art will not deviate from the scope of the patent right of the case.

In summary, regardless of the purpose, means or effect of this case, it is shown that it is very different from the conventional technology, and its first invention is suitable for practicality, and it does meet the patent requirements of the invention. Please check it out and grant the patent as soon as possible Society is for the best prayer.

100: mobile device 110: Application processor 120: display drive circuit 130: fingerprint recognition circuit 140: touch circuit 150: display panel 160: fingerprint sensor 170: touch sensor S201: After the touch circuit detects a finger pressing operation on the touch sensor, it first wakes up the display drive circuit and the fingerprint recognition circuit, so that the display drive circuit displays a pre-stored in a partial area on the display panel Fingerprint input prompt image S202: Make the fingerprint recognition circuit collect a fingerprint image and then wake up the application processor to execute a fingerprint recognition program

Figure 1 shows a block diagram of an embodiment of the mobile device of the present invention; and FIG. 2 shows a flowchart of an embodiment of the sleep wake-up method of the present invention.

100: mobile device

110: Application processor

120: display drive circuit

130: fingerprint recognition circuit

140: touch circuit

150: display panel

160: fingerprint sensor

170: touch sensor

Claims (8)

A mobile device includes: an application processor; a display driving circuit coupled between the application processor and a display panel; a fingerprint recognition circuit coupled between the application processor and a fingerprint sensor; and A touch circuit is coupled between the application processor and a touch sensor for waking up the display driving circuit and the touch sensor after detecting a finger pressing operation on the touch sensor Fingerprint recognition circuit, so that the display driving circuit displays a pre-stored fingerprint input prompt image in a partial area on the display panel, and makes the fingerprint recognition circuit collect a fingerprint image, and then wake up the application processor to execute A fingerprint recognition program; wherein the touch circuit wakes up the fingerprint recognition circuit through an integrated circuit bus; the touch circuit wakes up the display driving circuit through a universal input and output interface or a sequence of peripheral interfaces; and the The touch control circuit sends an interrupt signal to the application processor to wake up the application processor. The mobile device according to claim 1, wherein the local area is a fixed area or any area of the display panel. The mobile device according to claim 1, wherein the pre-stored fingerprint input prompt image is stored in a flash memory. The mobile device according to claim 1, wherein the fingerprint recognition circuit and the fingerprint sensor are integrated into a fingerprint sensor chip. The mobile device according to claim 1, wherein the application processor reads a pressing position of the finger pressing operation through the interrupt signal, and reads the fingerprint image collected by the fingerprint recognition circuit according to the pressing position Carry out the fingerprint recognition program. A sleep wake-up method is applied to a mobile device. The mobile device has: an application processor; a display drive circuit coupled between the application processor and a display panel; and a fingerprint recognition circuit coupled to Between the application processor and a fingerprint sensor; and a touch circuit coupled between the application processor and a touch sensor. The method is characterized by including: enabling the touch circuit to detect After pressing a finger on the touch sensor, the display is first awakened Display driving circuit and the fingerprint recognition circuit, so that the display driving circuit displays a pre-stored fingerprint input prompt image in a partial area on the display panel, and the fingerprint recognition circuit collects a fingerprint image, and then wakes up the The processor is applied to execute a fingerprint recognition program; wherein the touch circuit wakes up the fingerprint recognition circuit through an integrated circuit bus; the touch circuit wakes up the display through a general-purpose input and output interface or a series of peripheral interfaces The driving circuit; and the touch control circuit transmits an interrupt signal to the application processor to wake up the application processor. The sleep wake-up method according to claim 6, wherein the local area is a fixed area or any area of the display panel. The sleep wake-up method according to claim 6, wherein the application processor reads a pressing position of the finger pressing operation through the interrupt signal, and reads the fingerprint image collected by the fingerprint recognition circuit according to the pressing position To execute the fingerprint recognition procedure.

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