Education large screen

Abstract

The utility model provides an education large screen, and relates to the technical field of electronic equipment. The large education screen comprises a shell, a screen body and loudspeakers, the screen body is installed on the shell, the shell is provided with two side frames which are oppositely arranged, and each side frame is provided with a plurality of sound columns formed by the loudspeakers. According to the large education screen, the loudspeakers are installed on the side frames, compared with the mode that the loudspeakers are installed on the bottom frame, the positions of the loudspeakers are high, sound can be prevented from being absorbed and reflected by students, desks and the like, and the attenuation of sound propagating backwards is reduced; and meanwhile, the loudspeaker is mounted on the side frame, so that the top frame and the bottom frame of the shell can be narrowed, the attractiveness of the appearance modeling is improved, and the use experience of a user is improved in the aspects of the appearance and the tone quality.

Description

Technical Field

[0001] This utility model relates to the field of electronic equipment technology, and in particular to an educational large screen. Background Technology

[0002] With the development of technology, educational displays have become an important tool in modern education, providing rich teaching resources and improving teaching effectiveness. However, traditional educational displays typically place speakers on either the bottom or top bezel. Placing speakers on the bottom bezel results in a low placement, almost level with students, desks, benches, and books, leading to audio absorption and reflection from these surfaces. This results in significant sound attenuation and poor sound quality for students in the middle and back rows. Placing speakers on the top bezel requires a wider frame to accommodate the speaker's sound output area, resulting in an unsightly appearance. Utility Model Content

[0003] This utility model provides an educational large screen to solve the defects of existing technology where speakers are set at the top or bottom, resulting in severe audio attenuation, poor sound quality, and an ugly appearance.

[0004] This utility model provides an educational large screen, including: a housing, a screen and speakers. The screen is installed in the housing. The housing has two side frames arranged opposite to each other. Each side frame is respectively equipped with a sound column formed by a plurality of speakers.

[0005] According to the present invention, an educational large screen is provided, wherein the housing has a bottom frame, and the height of the sound column along the central axis in the horizontal direction is higher than the height of the bottom frame.

[0006] According to the present invention, each of the sound columns includes a full-range speaker and a tweeter, with the full-range speaker located below the tweeter.

[0007] According to the present invention, an educational large screen is provided, wherein the side frame includes a rear shell and a front cover, a partition is provided inside the rear shell, the partition divides the rear shell into a first chamber and a second chamber, a tweeter is arranged in the first chamber, a full-range speaker is arranged in the second chamber, the front cover covers the rear shell, and sound insulation cotton is sandwiched between the front cover and the partition.

[0008] According to the present invention, an educational large screen is provided, wherein there are multiple full-range speakers.

[0009] According to the present invention, an educational large screen is provided, wherein the full-range speaker is a planar diaphragm speaker.

[0010] According to the present invention, an educational large screen further includes a processor, a power amplifier module, and a frequency divider connected in sequence. The processor is used to process the audio information to be played, the power amplifier module is used to amplify the audio information transmitted by the processor, and the frequency divider is used to divide the audio information according to frequency bands. The frequency divider inputs the low-frequency signal to the full-range speaker and the high-frequency signal to the tweeter.

[0011] According to the present invention, an educational large screen further includes at least one of a volume control module, a mixing module, an equalizer module, a dynamic range control module, a filter module, and a DC blocking module; the volume control module is used to adjust the output volume of the audio signal; the mixing module is used to combine and adjust audio signals from different channels; the equalizer module is used to adjust the volume of the audio signal in different frequency ranges; the dynamic range control module is used to compress and amplify the audio signal; the filter module is used to filter the audio signal; and the DC blocking module is used to eliminate the influence of DC components on the audio signal.

[0012] According to the present invention, the distance between two adjacent speakers in the same sound column is 20~100mm.

[0013] According to the present invention, an educational large screen is provided with a sound outlet on the side frame, and the sound outlet area of ​​the sound outlet is not less than 30% of the surface area of ​​the side frame.

[0014] The educational screen provided by this utility model has speakers installed on the side frame. Compared with the method of installing them on the bottom frame, the speakers are positioned higher, which can avoid the sound being absorbed and reflected by students, desks, etc., and reduce the attenuation of sound propagation backward. At the same time, installing the speakers on the side frame allows the top and bottom frames of the shell to be narrower, improving the aesthetics of the appearance and thus enhancing the user experience in terms of both appearance and sound quality. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a partial structural schematic diagram of the educational large screen provided by this utility model.

[0017] Figure 2 This is a partial cross-sectional view of the educational large screen provided by this utility model.

[0018] Figure 3 This is a front view of the educational large screen provided by this utility model.

[0019] Figure 4 This is a hardware block diagram of the educational large screen provided by this utility model.

[0020] Figure label:

[0021] 10. Housing; 11. Side frame; 111. Rear shell; 112. Front cover; 12. Bottom frame; 13. Divider; 14. First chamber; 15. Second chamber; 16. Sound outlet; 20. Screen; 31. Tweeter; 32. Full-range speaker; 40. Processor; 50. Power amplifier module; 60. Microphone array. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] The terms "first" and "second" in the specification and claims of this utility model may explicitly or implicitly include one or more of the features. In the description of this utility model, unless otherwise stated, "multiple" means two or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0024] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] The following is combined with Figures 1-4 This invention describes an educational large screen.

[0027] This utility model provides an educational large screen, such as... Figure 1 and Figure 2 As shown, it includes a housing 10, a screen 20, and speakers. The screen 20 is mounted on the housing 10, which has two opposing side frames 11. Each side frame 11 is equipped with a sound column formed by multiple speakers.

[0028] Screen 20 can be either a touchscreen or a regular display screen. If screen 20 is a touchscreen, users can input commands via touch. If screen 20 is a regular display screen, users can control screen 20 using input devices such as a remote control or a keyboard.

[0029] Multiple speakers form sound columns, with one sound column installed on each of the opposite sides of the screen 20. Specifically, the number and configuration of speakers in the two sound columns are the same to ensure that the sound quality of the sound columns on the left and right sides of the screen 20 is balanced and consistent.

[0030] The educational screen provided in this embodiment has a speaker mounted on the side frame 11. Compared to mounting it on the bottom frame 12, the speaker is positioned higher, which can prevent sound from being absorbed and reflected by students, desks, etc., and reduce the attenuation of sound propagation backward. At the same time, mounting the speaker on the side frame 11 allows the top and bottom frames 12 of the housing 10 to be narrower, improving the aesthetics of the appearance and thus enhancing the user experience in terms of both appearance and sound quality.

[0031] The housing 10 has a bottom frame 12, and the height of the central axis of the sound column along the horizontal direction is higher than the height of the bottom frame 12.

[0032] The horizontal axis of a sound column refers to the axis of symmetry along the height of the sound column, which extends horizontally. Taking a sound column containing four speakers as an example, with the four speakers arranged longitudinally, the horizontal axis of the sound column refers to the perpendicular bisector of the longitudinal line formed from the top of the uppermost speaker to the bottom of the lowermost speaker.

[0033] Compared to the bottom frame 12, the central axis of the sound column is higher than the bottom frame 12 in the horizontal direction. The sound is less likely to be absorbed and reflected by classroom desks, chairs, benches, students' sitting postures, etc., thus ensuring that the sound attenuation is reduced when it reaches the ears of students in the middle and back rows, and ensuring that the sound quality can be transmitted well to a distance.

[0034] In one specific embodiment, such as Figure 2 As shown, the speakers in the same sound column include a full-range speaker 32 and a tweeter 31, with the full-range speaker 32 located below the tweeter 31.

[0035] If only a full-range speaker 32 is installed in the sound column, the sound quality is good in the low and mid-frequency range, but the coverage of the high frequencies is relatively weak, resulting in less than ideal high-frequency detail, clarity, and brightness when playing music. If only a tweeter 31 is installed in the sound column, the low and mid-frequency response is poor, resulting in a thin and delicate overall sound quality when playing music or sounds containing low and mid-frequency components, lacking bass depth and impact. Therefore, in this invention, each sound column is equipped with a full-range speaker 32 and a tweeter 31, effectively covering the low, mid, and high frequency ranges, making the sound quality fuller, more detailed, and clearer.

[0036] There are multiple full-range speakers 32. For example, there can be one, two, three, or four full-range speakers 32.

[0037] For example, such as Figure 2 and Figure 3 As shown, each speaker column includes four speakers: three full-range speakers 32 and one tweeter 31. The tweeter 31 and the three full-range speakers 32 are arranged vertically at intervals, with the tweeter 31 located above the three full-range speakers 32. The tweeter 31 is used to play high-frequency signals, and the full-range speakers 32 are used to play low-frequency and mid-frequency signals.

[0038] like Figure 2 As shown, the side frame 11 includes a rear shell 111 and a front cover 112. A partition 13 is provided inside the rear shell 111, which divides the rear shell 111 into a first chamber 14 and a second chamber 15. A tweeter 31 is arranged in the first chamber 14, and a full-range speaker 32 is arranged in the second chamber 15. Sound insulation cotton is sandwiched between the front cover 112 and the partition 13.

[0039] The first chamber 14 and the second chamber 15 are separated by a partition 13, thereby placing the full-range speaker 32 and the tweeter 31 in different chambers and avoiding mutual interference between the audio frequency bands of the two types of speakers. At the same time, the front cover 112 covers the rear shell 111, and sound insulation cotton is sandwiched between the front cover 112 and the partition 13 to prevent audio from entering the other chamber through the gap between the front cover 112 and the partition 13, thus improving the sound quality of the speaker column.

[0040] Optionally, the full-range speaker 32 is a planar diaphragm speaker. Planar diaphragm speakers provide a wide soundstage and superior sound quality. Furthermore, the lightweight nature of planar diaphragm speakers makes them superior in high-frequency response compared to other types of full-range speakers 32, delivering clear treble and further ensuring the sound quality of the speaker column. Preferably, the full-range speaker 32 is a super-linear planar diaphragm speaker, combining super-linear technology and planar diaphragm characteristics to provide a more realistic, clear, and dynamic music experience with better sound quality. When multiple full-range speakers 32 are used, each full-range speaker 32 is a super-linear planar diaphragm speaker, resulting in minimal sound attenuation and enabling loudness design for the classroom sound field.

[0041] like Figure 4 As shown, the educational large screen also includes a processor 40, a power amplifier module 50, and a crossover, which are connected in sequence. The processor 40 processes the audio information to be played, the power amplifier module 50 amplifies the audio information transmitted from the processor 40, and the crossover divides the audio information according to frequency bands. Specifically, the crossover inputs the low- and mid-frequency signals to the full-range speaker 32 and the high-frequency signals to the tweeter 31.

[0042] The processor 40 processes audio files that the local disk or application needs to play, and transmits the processed audio signal to the power amplifier module 50 via the IIS bus. The power amplifier module 50 amplifies the received weak electrical signal and, in conjunction with the crossover, performs crossover processing between the full-range speaker 32 and the tweeter 31. The crossover point is determined based on the frequency response curves of the tweeter 31 and the full-range speaker 32, typically within the 3kHz-8kHz frequency range. Optionally, the crossover can be integrated with the power amplifier module 50. For example, the power amplifier module 50 uses the ESMT AD82088 chip, and the digital crossover decomposes the audio signal into mid-low frequency and high frequency signals. The power amplifier module 50 can precisely amplify and process each frequency band signal, inputting the mid-low frequency signal to the full-range speaker 32 and the high frequency signal to the tweeter 31.

[0043] In use, the full-range speaker 32 and the tweeter 31 transmit the acquired signal to the microphone array 60 and are connected to the processor 40 via the USB bus.

[0044] Optionally, the educational display screen may also include at least one of the following: a mixing module, an equalizer module, a dynamic range control module, a filter module, and a DC blocking module. The volume control module adjusts the output volume of the audio signal. The mixing module combines and adjusts audio signals from different channels. The equalizer module adjusts the volume of the audio signal across different frequency ranges. The dynamic range control module compresses and amplifies the audio signal, making the sound smoother or louder. The filter module filters the audio signal to remove unwanted frequency components or enhance specific frequency components. The DC blocking module eliminates the influence of DC components on the audio signal.

[0045] Users can smoothly adjust the volume within a specific range using the volume control module, ensuring the audio signal output is neither too strong nor too weak, thus meeting listening preferences. The mixing module combines and adjusts audio signals from different channels to create a harmonious audio output. The equalizer module improves audio quality and timbre by enhancing or attenuating specific frequency audio signals. For example, enhancing bass can make music sound richer and more powerful, while enhancing treble can make it clearer and brighter.

[0046] The dynamic range control module makes audio smoother and easier to control. It reduces sudden volume changes, resulting in a more consistent overall audio signal. The dynamic range control module ensures that audio maintains a high volume without overloading electronic music. The filter module removes or blocks specific frequency bands, achieving noise reduction, noise elimination, and improved sound quality. DC components can cause audio signal deviation or distortion; using a DC blocking module removes DC components, ensuring the accuracy and stability of the audio signal during transmission and processing.

[0047] The spacing between two adjacent speakers in the same sound column is 20~100mm.

[0048] The spacing between two adjacent speakers affects the directivity and clarity of the sound. Sound waves emitted by two speakers that are too close together may interfere with each other, resulting in poor directivity; they may also cause resonance or destructive interference at certain frequencies, thus affecting clarity. Furthermore, too close a spacing can also affect the sound coverage. If the distance between two speakers is too small, their sound waves may overlap in some areas, while in other areas there may be gaps or weak sound, leading to inconsistent sound effects for listeners in different locations and affecting the overall listening experience. Therefore, to avoid mutual interference between adjacent speakers, the spacing between two adjacent speakers in the same sound column should be at least 20mm. However, limited by the length of the side frame 11 and the number and size of the speakers in the sound column, the spacing between two adjacent speakers should not exceed 100mm.

[0049] For example, the screen 20 is 1100mm wide, the full-range speaker 32 is 264mm long, the tweeter 31 is 49mm long, and the total length of the three full-range speakers 32 and the tweeter 31 is 991mm. The spacing between two adjacent speakers can be set to 50mm to avoid interference between speakers while making full use of the installation space of the side frame 11. Alternatively, the spacing between two adjacent speakers can be 20mm, 40mm, or 100mm, etc. It should be noted that when there are three or more speakers on the same sound column, the spacing between two adjacent speakers within the same sound column can be the same or different.

[0050] like Figure 1 and Figure 2 As shown, the side frame 11 is provided with a sound outlet 16, and the sound outlet area of ​​the sound outlet 16 is not less than 30% of the surface area of ​​the side frame 11.

[0051] The sound output area of ​​the sound outlet 16 refers to the sum of the areas of all the sound outlets 16. The side frame 11 is made of metal. The sound outlet 16 is a circular hole, but it can also be an oval, square, or other shape. If the diameter of the sound outlet 16 is too large, external dust can easily enter the housing 10 through the sound outlet 16, and the low-frequency range of the audio will be attenuated, resulting in distortion and a lack of layering in the sound quality. If the diameter of the sound outlet 16 is too small, the audio output volume will be limited, affecting the overall sound quality performance. Optionally, the diameter of the sound outlet 16 is 2~4mm, for example, the diameter of the sound outlet 16 is 3mm. The diameter of the sound outlet 16 can be 2mm, 2.5mm, 4mm, etc.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An educational large screen, characterized in that, include: The housing, screen, and speakers are provided. The screen is mounted on the housing. The housing has two opposing side frames, and each side frame is equipped with a plurality of speakers forming a sound column. Each of the aforementioned sound columns includes a full-range speaker and a tweeter, with the full-range speaker located below the tweeter; There are multiple full-range speakers.

2. The educational large screen according to claim 1, characterized in that, The housing has a bottom frame, and the height of the sound column along its horizontal central axis is higher than the height of the bottom frame.

3. The educational large screen according to claim 2, characterized in that, The side frame includes a rear shell and a front cover. The rear shell is provided with a partition, which divides the rear shell into a first chamber and a second chamber. The tweeter is located in the first chamber, and the full-range speaker is located in the second chamber. The front cover covers the rear shell, and sound insulation cotton is sandwiched between the front cover and the partition.

4. The educational large screen according to claim 2, characterized in that, The full-range speaker is a planar diaphragm speaker.

5. The educational large screen according to claim 2, characterized in that, It also includes a processor, a power amplifier module, and a crossover connected in sequence. The processor is used to process the audio information to be played, the power amplifier module is used to amplify the audio information transmitted from the processor, and the crossover is used to divide the audio information into frequency bands. The crossover inputs the low- and mid-frequency signals to the full-range speaker and the high-frequency signals to the tweeter.

6. The educational large screen according to claim 5, characterized in that, It also includes at least one of a volume control module, a mixing module, an equalizer module, a dynamic range control module, a filter module, and a DC blocking module; the volume control module is used to adjust the output volume of the audio signal; the mixing module is used to combine and adjust audio signals from different channels; the equalizer module is used to adjust the volume of the audio signal in different frequency ranges; the dynamic range control module is used to compress and amplify the audio signal; the filter module is used to filter the audio signal; and the DC blocking module is used to eliminate the influence of DC components on the audio signal.

7. The educational large screen according to claim 1, characterized in that, The spacing between two adjacent speakers in the same sound column is 20-100mm.

8. The educational large screen according to claim 1, characterized in that, The side frame is provided with a sound outlet, and the sound outlet area of ​​the sound outlet is not less than 30% of the surface area of ​​the side frame.

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