Imaging device, imaging method, and electronic apparatus
地域：
Kanagawa
摘要
An imaging device includes a controller, a power supply, a regulator, and a switch. The controller is configured to control an imaging unit, on the basis of a command and data that are received from a host in accordance with an I2C/I3C communication protocol. The power supply is configured to supply a voltage to a digital block of the controller. The digital block is configured to be subjected to dynamic voltage frequency scaling within one-frame operation. The regulator and the switch are provided between the digital block and the power supply, and coupled in parallel with each other.
說(shuō)明書(shū)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
The disclosure relates to an imaging device, an imaging method, and an electronic apparatus.
Recently, imaging devices have seen development in metal oxide semiconductor (MOS) image sensors, such as complementary metal oxide semiconductors (CMOS). For example, Japanese Unexamined Patent Application Publication No. 2010-245506 discloses an imaging device in which a semiconductor wafer having a pixel array portion and a semiconductor wafer having logic circuitry are laminated.
It has been desired to save power consumption of imaging devices.
It is desirable to provide an imaging device, an imaging method, and an electronic apparatus that make it possible to save power consumption.
An imaging device according to an embodiment of the disclosure includes a controller, a power supply, a regulator, and a switch. The controller is configured to control an imaging unit, on the basis of a command and data that are received from a host in accordance with an I2C/I3C communication protocol. The power supply is configured to supply a voltage to a digital block of the controller. The digital block is configured to be subjected to dynamic voltage frequency scaling (DVFS) within one-frame operation. The regulator and the switch are provided between the digital block and the power supply, and coupled in parallel with each other.
權(quán)利要求
What is claimed is:1. An imaging device comprising:a controller configured to control an imaging unit, on a basis of a command and data that are received from a host in accordance with an I2C/I3C communication protocol; a power supply configured to supply a voltage to a digital block of the controller, the digital block being configured to be subjected to dynamic voltage frequency scaling within one-frame operation; and a regulator and a switch that are provided between the digital block and the power supply, and coupled in parallel with each other. 2. The imaging device according to claim 1 , wherein the regulator comprises a low dropout that includes:a circuit configured to output a second voltage that is lower than a first voltage to be supplied from the power supply; and a circuit configured to switch between the first voltage and the second voltage as an output voltage. 3. The imaging device according to claim 2 , wherein the controller is configured to execute the dynamic voltage frequency scaling within the one-frame operation by controlling setting of the output voltage of the low dropout and by controlling on and off of the switch. 4. The imaging device according to claim 3 , wherein, upon executing the dynamic voltage frequency scaling within the one-frame operation, the controller is configured to:change a frequency of a clock signal to be used in the controller from high to low; change the switch from on to off, after changing the frequency of the clock signal from high to low; and change the setting of the output voltage of the low dropout from the first voltage to the second voltage, following the change of the switch from on to off. 5. The imaging device according to claim 4 , wherein, upon executing the dynamic voltage frequency scaling within the one-frame operation, the controller is configured to:change the setting of the output voltage of the low dropout from the second voltage to the first voltage after a predetermined period has elapsed from the change in the setting of the output voltage of the low dropout from the first voltage to the second voltage; change the switch from off to on, following the change in the setting of the output voltage of the low dropout from the second voltage to the first voltage; and change the frequency of the clock signal from low to high. 6. The imaging device according to claim 1 , wherein the digital block, the regulator, and the switch are provided in a single chip. 7. An imaging method comprising:providing a controller configured to control an imaging unit, on a basis of a command and data that are received from a host in accordance with an I2C/I3C communication protocol; and supplying a voltage to a digital block of the controller via a regulator and a switch that are coupled in parallel with each other, the digital block being configured to be subjected to dynamic voltage frequency scaling within one-frame operation. 8. The imaging method according to claim 7 ,wherein the regulator comprises a low dropout that includes: a circuit configured to output a second voltage that is lower than a first voltage to be supplied from the power supply; and a circuit configured to switch between the first voltage and the second voltage as an output voltage, and wherein the imaging method further comprises executing the dynamic voltage frequency scaling within the one-frame operation by controlling setting of the output voltage of the low dropout and by controlling on and off of the switch. 9. The imaging method according to claim 8 , wherein the executing the dynamic voltage frequency scaling within the one-frame operation comprises:changing a frequency of a clock signal to be used in the controller from high to low; changing the switch from on to off, after changing the frequency of the clock signal from high to low; and changing the setting of the output voltage of the low dropout from the first voltage to the second voltage, following the changing of the switch from on to off. 10. The imaging method according to claim 9 , wherein the executing the dynamic voltage frequency scaling within the one-frame operation comprises:changing the setting of the output voltage of the low dropout from the second voltage to the first voltage after a predetermined period has elapsed from the changing in the setting of the output voltage of the low dropout from the first voltage to the second voltage; changing the switch from off to on, following the changing in the setting of the output voltage of the low dropout from the second voltage to the first voltage; and changing the frequency of the clock signal from low to high. 11. An electronic apparatus comprising:a host configured to communicate in accordance with an I2C/I3C communication protocol; a controller configured to control an imaging unit, on a basis of a command and data that are received from the host in accordance with the I2C/I3C communication protocol; a power supply configured to supply a voltage to a digital block of the controller, the digital block being configured to be subjected to dynamic voltage frequency scaling within one-frame operation; and a regulator and a switch that are provided between the digital block and the power supply, and coupled in parallel with each other.
意見(jiàn)反饋
使用該功能遇到問(wèn)題
該功能需要專業(yè)版企業(yè)版VIP權(quán)限，您可以：
您也可以聯(lián)系官方QQ: 2157717237 電話: 13264338900