JP-7855562-B2 - Mobile device

Inventors

• 山崎 舜平
• 池田 隆之
• 木村 清貴
• 玉造 祐樹

Assignees

• 株式会社半導体エネルギー研究所

Dates

Publication Date

20260508

Application Date

20231211

Priority Date

20181011

Claims (1)

1. A mobile device comprising a sound source detection device, a control device, and a crew protection device, The sound source detection device has the function of identifying the location of the sound source of an external sound , The sound source detection device comprises a first microphone, a second microphone, a first delay circuit, a second delay circuit, and a signal processing circuit. The first delay circuit comprises a first selection circuit, a second selection circuit, and a first plurality of holding circuits. The second delay circuit comprises a third selection circuit, a fourth selection circuit, and a second plurality of holding circuits. The sound waves emitted by the sound source are picked up by the first microphone and converted into a first sound source signal, and are also picked up by the second microphone and converted into a second sound source signal. The first sound source signal is supplied to the first selection circuit. The second sound source signal is supplied to the third selection circuit. When the first selection signal becomes high level, the transistor in the first selection circuit turns on, and a first analog voltage corresponding to the first sound source signal is written to the first plurality of holding circuits. When the first selection signal becomes low level, the transistor in the first selection circuit turns off, and the first analog voltage is held in the first plurality of holding circuits. When the second selection signal becomes high level, the transistor in the third selection circuit turns on, and the second analog voltage corresponding to the second sound source signal is written to the second plurality of holding circuits. When the second selection signal becomes low level, the transistor in the third selection circuit turns off, and the second analog voltage is held in the second plurality of holding circuits. The second selection circuit, when the third selection signal becomes high level, turns on a transistor in the second selection circuit, thereby selecting one of the first analog voltages held by the first plurality of holding circuits and outputting it to the signal processing circuit. The fourth selection circuit, when the fourth selection signal becomes high level, turns on the transistor of the second selection circuit, thereby selecting one of the second analog voltages held by the second plurality of holding circuits and outputting it to the signal processing circuit. The transistors in the first plurality of holding circuits and the second plurality of holding circuits are made of oxide semiconductors, and the device is for a mobile body.

Description

One aspect of the present invention relates to a vehicle warning device. Alternatively, one aspect of the present invention relates to a method for operating such a device. Furthermore, one aspect of the present invention is not limited to the above-mentioned technical field. The technical field of one aspect of the invention disclosed herein relates to a product, method, or manufacturing method. Alternatively, one aspect of the present invention relates to a process, machine, manufacture, or composition of matter. Vehicles, such as automobiles, have become an indispensable means of transportation and logistics in modern society. In recent years, many organizations have been developing technologies for recognizing the vehicle's surrounding environment using sensors such as LiDAR (Light Detection and Ranging), millimeter-wave radar, and cameras. Patent Document 1 discloses a method for detecting obstacles in areas not visible to the naked eye using sound source localization technology with microphones. Japanese Patent Application Publication No. 5-85288 Figures 1A and 1B are diagrams illustrating the vehicle.Figures 2A, 2B, and 2C are block diagrams illustrating example configurations of a vehicle warning system and a sound source detection system.Figure 3 is a flowchart illustrating the operation of the vehicle warning system.Figure 4 is a flowchart illustrating the operation of the vehicle warning system.Figure 5 is a diagram illustrating the operation of a vehicle warning system.Figure 6 is a diagram illustrating the operation of a vehicle warning system.Figure 7 illustrates the operation of the vehicle warning system.Figure 8 is a diagram illustrating the operation of a vehicle warning system.Figure 9 is a diagram illustrating the operation of the vehicle warning system.Figures 10A and 10B illustrate examples of neural network configurations.Figures 11A and 11B are block diagrams showing examples of the configuration of a sound source detection device.Figure 12 illustrates an example of a delay circuit configuration.Figures 13A and 13B illustrate examples of the operation of a delay circuit.Figure 14 illustrates an example of a delay circuit configuration.Figure 15 is a timing chart illustrating an example of the operation of a delay circuit.Figures 16A and 16B illustrate the sound source direction estimation technique.Figure 17 illustrates an example of a signal processing circuit configuration.Figures 18A, 18B, and 18C illustrate examples of circuit configurations for signal processing circuits.Figures 19A and 19B illustrate examples of circuit configurations for delay circuits.Figures 20A and 20B illustrate examples of differential circuit configurations.Figure 21 illustrates an example of the configuration of a semiconductor device.Figure 22 illustrates an example of the configuration of a semiconductor device.Figures 23A, 23B, and 23C show examples of transistor structures.Figures 24A, 24B, 24C, 24D, and 24E illustrate the configuration of semiconductor wafers and electronic components.Figures 25A and 25B show examples of the configuration of electronic equipment.Figure 26 is a diagram illustrating the market image. The embodiments of the present invention will be described in detail below with reference to the drawings. However, it will be readily apparent to those skilled in the art that the present invention is not limited to the following description, and its form and details can be modified in various ways. Furthermore, the present invention is not construed to be limited to the embodiments described below. In the figures described herein, the size, layer thickness, or area of each component may be exaggerated or omitted to clarify the invention. Therefore, the scale is not necessarily limited. Furthermore, in top views (also called "plan views") and perspective views, some components may be omitted to improve clarity. Some hidden lines may also be omitted. In this specification, ordinal numbers such as "first," "second," etc., are used to avoid confusion of constituent elements and do not indicate any order or ranking, such as process sequence or layering sequence. Furthermore, even if an ordinal number is not used for a term in this specification, it may be added in the claims to avoid confusion of constituent elements. Also, even if an ordinal number is used for a term in this specification, a different ordinal number may be used in the claims. Additionally, even if an ordinal number is used for a term in this specification, it may be omitted in the claims. Furthermore, where it is explicitly stated in this specification that X and Y are connected, this specification discloses the following types of connections: electrically connected, functionally connected, and directly connected. Therefore, it is not limited to predetermined connection relationships, such as those shown in the diagrams or text, but also includes other connection relationships. Furthermore, in this specification, "parallel