Tablet devices

Abstract

This application relates to a tablet computer. The tablet computer includes a device body, an ultrasonic transmitter, and an ultrasonic receiver. The front of the device body has a transmission port. The ultrasonic transmitter is located inside the device body, facing the transmission port. The device body is electrically connected to the ultrasonic transmitter and is used to control the ultrasonic transmitter to emit ultrasonic signals at regular intervals. The ultrasonic receiver is located on the front of the device body and is used to receive the reflected wave signal from the ultrasonic signal. The ultrasonic receiver is electrically connected to the device body and is used to output the reflected wave signal to the device body. The device body determines the measured distance and outputs a reminder message based on the reflected wave signal. This tablet computer can remind users to maintain a scientifically safe viewing distance.

Description

Technical Field

[0001] This application relates to the field of electronic device technology, and more specifically, to a tablet device. Background Technology

[0002] To meet user needs, tablet devices (such as tablet learning machines) have become widely used. However, when using tablets, if the user's viewing distance is less than a certain value (e.g., 30cm), the eyes will be under constant strain, easily leading to eye fatigue. Therefore, for the sake of users' eye health, it is necessary to correct incorrect usage habits. Summary of the Invention

[0003] This application provides a tablet device that can remind users to maintain a scientific eye-viewing distance.

[0004] A tablet device, comprising:

[0005] The device body has a transmission port on its front side;

[0006] An ultrasonic transmitter is located inside the device body, facing the emission port. The device body is electrically connected to the ultrasonic transmitter and is used to control the ultrasonic transmitter to emit ultrasonic signals at regular intervals.

[0007] An ultrasonic receiver, located on the front of the device body, is used to receive the reflected wave signal of the ultrasonic signal. The ultrasonic receiver is electrically connected to the device body and is used to output the reflected wave signal to the device body. The device body determines the measured distance and outputs a reminder message based on the reflected wave signal.

[0008] Optionally, the ultrasonic transmitter is configured as a medium-to-high frequency ultrasonic transmitter with a transmission frequency of 25 to 35 kHz.

[0009] Optionally, the device body includes a frame and a display screen assembled on the frame, and the gap at the junction of the frame and the display screen forms the emission port.

[0010] Optionally, the frame includes an upper frame located above the display screen, and the emission port is formed at the gap where the upper frame meets the display screen.

[0011] Optionally, the emission port is located in the center of the upper frame.

[0012] Optionally, at least two ultrasonic receivers are provided, respectively located on the left and right sides of the transmitting port. Each ultrasonic receiver is used to receive the transmitted wave signal and is connected to the device body.

[0013] Optionally, each of the ultrasonic receivers and the transmitter are located on the same side of the display screen.

[0014] Optionally, there are two ultrasonic receivers, one on each side of the transmitter port, and both ultrasonic receivers and the transmitter port are located on the upper bezel of the display screen, in the middle position.

[0015] Optionally, the ultrasonic transmitter includes an ultrasonic speaker.

[0016] Optionally, the ultrasonic receiver includes a microphone.

[0017] This application provides a tablet device in which an ultrasonic transmitter emits ultrasonic signals from a port on the front of the device body. The ultrasonic signals are reflected back by the user, and the ultrasonic receiver can receive the reflected wave signals and output them to the device body. The device body 10 performs filtering, enhancement, and shaping processes to determine the measured distance and output reminder information. In this way, real-time reminders help users maintain a scientific eye-use distance and protect their vision health. Attached Figure Description

[0018] Figure 1 This is a front view of a tablet device illustrated in an exemplary embodiment of this application;

[0019] Figure 2 This is a schematic diagram of signal transmission when using an ultrasonic speaker and microphone. Detailed Implementation

[0020] The technical solutions in the embodiments (or "implementations") of this application will be clearly and completely described herein with reference to the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0021] If the embodiments of this application contain terms relating to directional indications or positional relationships (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movements between components in a specific posture (as shown in the attached figures); if the specific posture changes, the directional indications or positional relationships will also change accordingly. Furthermore, the terms "first" and "second" used in the embodiments of this application are only for descriptive convenience and should not be construed as indicating or implying relative importance.

[0022] Please refer to Figure 1 , Figure 1 This is a front view of a tablet device 100 shown as an exemplary embodiment of this application.

[0023] This application provides a tablet device 100, which includes a device body 10, an ultrasonic transmitter (not shown), and an ultrasonic receiver 20. The tablet device 100 includes, but is not limited to, a tablet learning machine.

[0024] The device body 10 has a transmission port 101 on its front side. Here, "front side" refers to the side of the device body 10 where the display screen is located. An ultrasonic transmitter is located inside the device body 10, facing the transmission port 101. The device body 10 is electrically connected to the ultrasonic transmitter and is used to control the ultrasonic transmitter to emit ultrasonic signals at regular intervals. Specifically, commands can be periodically sent to the ultrasonic transmitter via a system chip inside the device body 10.

[0025] An ultrasonic receiver 20 is disposed on the front of the device body 10 and is used to receive the reflected wave signal of the ultrasonic signal. The ultrasonic receiver 20 is electrically connected to the device body 10 and is used to output the reflected wave signal to the device body 10. The device body 10 determines the measured distance and outputs a reminder message based on the reflected wave signal.

[0026] As described above, the ultrasonic transmitter emits ultrasonic signals from the emission port 101 on the front of the device body 10. The ultrasonic signals are reflected back by the user, and the ultrasonic receiver 20 receives the reflected wave signals and outputs them to the device body 10. The device body 10 performs filtering, enhancement, and shaping processes to determine the measured distance and output reminder information. If the measured distance is less than the set minimum usage distance, the system will issue a reminder message, which may include, but is not limited to, a prompt voice, screen dimming, or pop-up text prompts. In this way, real-time reminders help users maintain a scientific eye-use distance and protect their visual health.

[0027] In one embodiment, the ultrasonic transmitter is configured as a mid-to-high frequency ultrasonic transmitter with a transmission frequency of 25–35 kHz. Ultrasonic signals in this frequency band have strong directivity and low attenuation.

[0028] Please continue to refer to this. Figure 1 In one embodiment, the device body 10 includes a frame 11 and a display screen 12 assembled on the frame 11, with the gap at the junction of the frame 11 and the display screen 12 forming the emission port 101. Thus, the emission port 101 can be formed by avoiding the installation gap between the frame 11 and the display screen 12, eliminating the need for additional holes in the frame 11, resulting in a simpler overall structure. Figure 1 In the illustrated embodiment, the bezel 11 surrounds the display screen 12.

[0029] In an alternative embodiment, the bezel 11 includes an upper bezel 110 located above the display screen 12, and the emission port 101 is formed in the gap between the upper bezel 110 and the display screen 12. When using the tablet device 100, the height of the upper bezel 110 is approximately level with the user's head; therefore, placing the emission port 101 here can make the measured distance more accurate. Of course, the emission port 101 is not limited to being located in the gap between the upper bezel 110 and the display screen 12. It should be noted that this document uses the vertical direction of the device body 10 during normal use as the reference direction, that is, Figure 1 The Z direction in the diagram represents the up and down direction.

[0030] In one embodiment, the transmitting port 101 is located in the exact center of the upper frame 110. This makes the position of the transmitting port 101 more centered, roughly facing the user, which helps the ultrasonic receiver 20 receive more accurate reflected wave signals.

[0031] In one embodiment, at least two ultrasonic receivers 20 are provided, respectively located on the left and right sides of the transmitting port 101. Each ultrasonic receiver 20 is used to receive reflected wave signals and is connected to the device body. With this configuration, multiple ultrasonic receivers 20 can output the received reflected wave signals to the device body 10, and the device body 10 can determine the measured distance based on the multiple reflected wave signals. In this embodiment, considering that the user's seat may deviate from the device body 10, to avoid large deviations in the measurement results, multiple ultrasonic receivers 20 can be used for correction, improving the measurement accuracy. This article uses the left-right direction of the device body 10 during normal use as the reference direction, i.e., Figure 1 The X direction in the diagram refers to the left and right directions.

[0032] In one embodiment, each of the ultrasonic receivers 20 and the transmitter 101 is located on the same side of the display screen 12. For example, they may all be located on the top side or on the bottom side, but this is not a limitation. Positioning them on the same side of the display screen 12 facilitates the layout of the internal components of the device body 10 and allows for a more centralized arrangement.

[0033] exist Figure 1 In the illustrated embodiment, two ultrasonic receivers 20 are provided, one on each side of the transmitter 101. Both ultrasonic receivers 20 and the transmitter 101 are located on the upper bezel of the display screen 12, in the center. In this embodiment, with one ultrasonic receiver 20 on each side of the transmitter 101 and all three positioned in the center of the upper bezel 110, the layout is more rational, resulting in a better relative position between the tablet device 100 and the user, and thus better measurement performance.

[0034] In one embodiment, the ultrasonic transmitter includes an ultrasonic speaker, and the ultrasonic receiver 20 includes a microphone. That is, the ultrasonic transmitter can be implemented using the ultrasonic speaker in the tablet device 100, and the ultrasonic receiver 20 can be implemented using the microphone in the tablet device 100. Of course, the audio range of the ultrasonic speaker can be adjusted using algorithms so that it can emit both ultrasonic signals and audio signals within the audible range, thus reducing the number of components and lowering costs.

[0035] Please refer to Figure 2 , Figure 2 This is a schematic diagram of signal transmission when using an ultrasonic speaker and microphone.

[0036] After the tablet device 100 enables the ultrasonic ranging function, the system chip periodically sends commands to the audio amplifier. The audio amplifier then excites the ultrasonic speaker to emit 25-35kHz ultrasonic signals. Utilizing the strong directivity of mid-to-high frequency signals, the ultrasonic signals can be ensured to propagate in a directional manner. When the ultrasonic waves encounter a user in front, they are reflected back. The reflected wave signal is received by the microphone on the front of the device 10 and output to the system chip inside the device 10. The system chip then uses an algorithm to filter, enhance, and shape the signal to calculate the distance between the user and the tablet device 100. If the measured distance is less than the set minimum usage distance, the system will issue a reminder message, which may include, but is not limited to, a voice prompt, screen dimming, or a pop-up text prompt. In this way, real-time reminders help users maintain a scientific eye-use distance.

[0037] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A flat panel device, characterized in that, include: The device body has a transmission port on its front side; An ultrasonic transmitter is located inside the device body, facing the emission port. The device body is electrically connected to the ultrasonic transmitter and is used to control the ultrasonic transmitter to emit ultrasonic signals at regular intervals. An ultrasonic receiver, located on the front of the device body, is used to receive the reflected wave signal of the ultrasonic signal. The ultrasonic receiver is electrically connected to the device body and is used to output the reflected wave signal to the device body. The device body determines the measured distance and outputs a reminder message based on the reflected wave signal.

2. The flat panel device according to claim 1, characterized in that, The ultrasonic transmitter is configured as a medium-to-high frequency ultrasonic transmitter with a transmission frequency of 25~35kHz.

3. The flat panel device according to claim 1, characterized in that, The device body includes a frame and a display screen assembled on the frame, and the gap at the junction of the frame and the display screen forms the emission port.

4. The flat panel device according to claim 3, characterized in that, The frame includes an upper frame located above the display screen, and the emission port is formed in the gap where the upper frame meets the display screen.

5. The flat panel device according to claim 4, characterized in that, The emission port is located in the center of the upper frame.

6. The flat panel device according to any one of claims 3 to 5, characterized in that, At least two ultrasonic receivers are provided, located on the left and right sides of the transmitting port. Each ultrasonic receiver is used to receive the transmitted wave signal and is connected to the main body of the device.

7. The flat panel device according to claim 6, characterized in that, Each of the ultrasonic receivers and the transmitter are located on the same side of the display screen.

8. The flat panel device according to claim 6, characterized in that, The ultrasonic receiver is provided in two parts, one on each side of the transmitter port. The two ultrasonic receivers and the transmitter port are located on the upper bezel of the display screen and in the middle position.

9. The flat panel device according to any one of claims 1 to 5, characterized in that, The ultrasonic transmitter includes an ultrasonic loudspeaker.

10. The flat panel device according to any one of claims 1 to 5, characterized in that, The ultrasonic receiver includes a microphone.

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