CN223139982U - Display device - Google Patents

Abstract

The utility model provides a display device, including a display module and at least one sound module arranged on the display module, wherein the display module includes a light guide plate and a back plate arranged in a stacked manner, and the back plate is provided with at least one group of through holes; at least one sound module, the sound module includes a first sound component and a second sound component, the first sound component covers a part of the through holes in at least one group of through holes; the second sound component covers another part of the through holes in at least one group of through holes; the first sound component and the light guide plate form a first vibration cavity in a part of the through holes, and the second sound component and the light guide plate form a second vibration cavity in another part of the through holes, and the vibrations generated by the first sound component and the second sound component are respectively transmitted to the light guide plate via the first vibration cavity and the second vibration cavity. The first sound component and the second sound component cooperate to produce sound, and each group of sound modules includes sound components of different frequencies, so that the sound quality of the display device is better.

Description

Display device

Technical Field

The utility model relates to the technical field of technical display, in particular to a display device.

Background

At present, an Organic Light-Emitting Diode (OLED) display screen is a display technology widely used in the display field by virtue of clear images and clear contrast. However, consumers have a higher demand for display screens, and not only for image quality, but also for sound quality. The screen sounding technology is widely applied to OLED display equipment gradually, and the screen sounding technology needs to fix an audio exciter on a screen to drive the screen to vibrate and sound. However, since a backlight source is required to be driven on a Liquid Crystal Display (LCD) screen, only an audio exciter can be arranged on the backlight source, and the audio exciter has a limited installation position, so that the sounding effect of the screen is poor.

Disclosure of utility model

In view of the above, the present utility model is directed to a display device to solve some or all of the technical problems in the background art.

In view of the above object, the present utility model provides a display device including:

The display module comprises a light guide plate and a back plate which are arranged in a stacked mode, wherein at least one group of through holes are formed in the back plate;

The sound generating module is arranged on one side of the backboard, far away from the light emitting direction of the display module, and comprises a first sound generating component and a second sound generating component, wherein the first sound generating component covers part of through holes in the at least one group of through holes;

The first sound generating component and the light guide plate form a first vibration cavity in the part of the through holes, the second sound generating component and the light guide plate form a second vibration cavity in the other part of the through holes, and vibration generated by the first sound generating component and the second sound generating component is transmitted to the light guide plate through the first vibration cavity and the second vibration cavity.

Optionally, the first vibration cavity and the second vibration cavity form a sound channel, and the light guide plate transmits vibration to the display module via the sound channel.

Optionally, the display device includes two sounding modules, and the two sounding modules are respectively used for forming a left channel and a right channel.

Optionally, the first sound generating component includes a vibrating membrane and a vibrator, wherein the vibrating membrane and the vibrator are stacked along one side, far away from the light emitting direction, of the back plate, the orthographic projection of the vibrating membrane on the back plate overlaps with the orthographic projection of the through hole on the back plate, and the orthographic projection of the vibrator on the back plate is in the orthographic projection of the through hole on the back plate.

Optionally, the second sound generating component includes a sound generator disposed on a side of the back plate away from the light emitting direction, and an orthographic projection of the sound generator on the back plate overlaps with an orthographic projection of the through hole on the back plate.

Optionally, an adhesive layer is disposed between the sounder and the back plate.

Optionally, the display module further includes an optical film layer, a buffer layer and a display panel, which are stacked along one side of the light emitting direction of the light guide plate.

Optionally, a reflective layer is disposed between the light guide plate and the back plate.

Optionally, the thickness of the back plate ranges from 0.8mm to 1.2mm.

Optionally, the thickness of the light guide plate ranges from 1.5mm to 2mm.

Optionally, the thickness of the buffer layer ranges from 0.86mm to 1.26mm.

Alternatively, the diaphragm has a thickness in the range of 0.3mm to 0.8mm.

Optionally, the through hole is rectangular, and has a width ranging from 35mm to 55mm and a length ranging from 55mm to 75mm.

The display device comprises a display module and at least one sound generating module arranged on the display module, wherein the display module comprises a light guide plate and a back plate which are arranged in a stacked mode, at least one group of through holes are formed in the back plate, the at least one sound generating module is arranged on one side, away from the light emitting direction of the display module, of the back plate, the sound generating module comprises a first sound generating component and a second sound generating component, the first sound generating component covers part of the through holes in the at least one group of through holes, the second sound generating component covers the other part of the through holes in the at least one group of through holes, the first sound generating component and the light guide plate form a first vibration cavity in the part of the through holes, the second sound generating component and the light guide plate form a second vibration cavity in the other part of the through holes, and vibration generated by the first sound generating component and the second sound generating component is transmitted to the light guide plate through the first vibration cavity and the second vibration cavity. Like this, first sound generation subassembly and second sound generation subassembly cooperation sound production, first vibration chamber and second vibration chamber cooperation promptly to two sets of sound generation subassembly cooperation sound production, and all including the sound generation subassembly of different frequencies in the every sound generation module of group, make display device's sound production quality more excellent, thereby improve the poor problem of LCD screen sound production effect.

Drawings

In order to more clearly illustrate the technical solutions of the present utility model or related art, the drawings that are required to be used in the description of the embodiments or related art will be briefly described below, and it is apparent that the drawings in the following description are only embodiments of the present utility model, and other drawings may be obtained according to the drawings without inventive effort to those of ordinary skill in the art.

Fig. 1 shows an exemplary LCD display screen.

Fig. 2 shows a schematic diagram of the structure of the display device of the present utility model.

Fig. 3 shows a schematic view of a hierarchical structure of a display device of the present utility model.

Fig. 4 shows a schematic partial cross-sectional view of an exemplary display device of the present utility model.

Fig. 5 shows a plot of the frequency response of the material and thickness of the back plate to the influence of sound quality.

Fig. 6 shows a plot of the lowest resonant frequency of the material and thickness of the back plate versus the acoustic quality.

Fig. 7 shows a graph of total harmonic distortion of the effects of the material and thickness of the backplate on sound quality.

Fig. 8 shows a plot of the frequency response of the thickness of the light guide plate to the influence of sound quality.

Fig. 9 shows a graph of the lowest resonance frequency of the thickness of the light guide plate with respect to the influence of sound quality.

Fig. 10 shows a graph of total harmonic distortion of the influence of the thickness of the light guide plate on sound quality.

Fig. 11 shows a plot of the frequency response of the buffer layer thickness versus sound quality.

Fig. 12 shows a plot of the lowest resonance frequency of the buffer layer thickness versus sound quality.

Fig. 13 shows a graph of total harmonic distortion of the impact of buffer layer thickness on sound quality.

Fig. 14 shows a plot of the frequency response of the effect of the diaphragm thickness on the sound quality.

Fig. 15 shows a graph of total harmonic distortion of the influence of the thickness of the diaphragm on the sound quality.

Fig. 16 shows a plot of the frequency response of the via size to the sound quality.

Fig. 17 shows a graph of the total harmonic distortion of the effect of via size on sound quality.

In the accompanying drawings:

01. The backlight source, 011, a left sound channel, 012, a right sound channel, 013, an audio exciter, 1, a display module, 2, a sound generating module, 21, a first sound generating module, 22, a second sound generating module, 221, a sound generator, 222, an adhesive layer, 211, a vibrator, 212, a vibrating membrane, 11, a display panel, 12, a buffer layer, 13, an optical film layer, 14, a light guide plate, 15, a reflecting layer, 16, a backboard, 161, a through hole, 162, a first vibrating cavity, 163, a second vibrating cavity, 141, a light emitting surface, 142 and a backlight surface.

Detailed Description

The present utility model will be further described in detail below with reference to specific embodiments and with reference to the accompanying drawings, in order to make the objects, technical solutions and advantages of the present utility model more apparent.

It should be noted that unless otherwise defined, technical or scientific terms used in the embodiments of the present utility model should be given the ordinary meaning as understood by one of ordinary skill in the art to which the present utility model belongs. The terms "first," "second," and the like, as used in embodiments of the present utility model, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.

Based on the background technology, the screen sounding technology is widely applied to the OLED display equipment, and the display panel of the OLED display equipment does not need backlight source driving, so that an audio exciter can be fixed on a screen, and the screen is driven by the audio exciter to vibrate and sound. However, most LCD display devices require a backlight drive, and cannot mount an audio exciter on a panel to vibrate and sound as in OLED display devices. Therefore, the audio exciter can only be fixed on the backlight source, and the sound is transmitted to the front side of the LCM (Liquid Crystal Module, i.e. the liquid crystal module or the LCD display module) by utilizing the characteristics of transmission of the low frequency band and diffraction of the high frequency band of the sound, so as to achieve the effect of sounding the screen. For example, fig. 1 shows an exemplary LCD display screen, as shown in fig. 1, an audio exciter 013 in the LCD display screen is fixed on a backlight 01, a groove is arranged on the backlight 01, the audio exciter 013 is fixed in the groove, the groove is divided into a left channel 011 and a right channel 012 by a dividing line a, and an audio exciter 013 is arranged in each channel, so that the sound production of the LCD display device is realized by the cooperation of the two audio exciters 013 arranged in the left channel 011 and the right channel 012. But the LCD screen with the structure has poor sounding effect, and can cause the problems of clunkness, insufficient low-frequency shock, insufficient medium-high frequency reduction degree, large distortion and the like.

Fig. 2 shows a schematic diagram of the structure of the display device of the present utility model.

Fig. 3 shows a schematic view of a hierarchical structure of a display device of the present utility model.

As shown in fig. 2 and 3, the display device comprises a display module 1 and at least one sounding module 2 arranged on the display module 1, wherein the display module 1 and the at least one sounding module 2 can be integrated into the display device through a shell. Specifically, the display module 1 includes a light guide plate 14 and a back plate 16 that are stacked, and at least one group of through holes 161 is disposed on the back plate 16. At least one group of through holes 161 are formed in the back plate 16, the sounding module 2 is arranged on one side, far away from the display module 1, of the back plate 16, and the sounding module 2 can transmit vibration to the light guide plate 14 through the through holes 161 so as to sound a screen. Preferably, the vibration frequency of the vibration is in a range audible to human ears, for example, between 20 and 20000 hertz. Each group of through holes 161 can comprise two through holes 161 which are respectively used for installing sounding components with different audios, so that sounding can be matched between the sounding components with different audios, and sounding quality of the display device can be better.

Exemplary backing plate 16 materials may be metals such as aluminum or plastics. The back plate 16 is disposed at a side of the light guide plate 14 away from the light emitting direction of the display module 1.

In some embodiments, as shown in fig. 2 and 3, the light guide plate 14 includes a light emitting surface 141 (illustratively, a direction in which the light emitting surface 141 faces upward is a light emitting direction) and a backlight surface 142, and the display module 1 further includes an optical film layer 13, a buffer layer 12, and a display panel 11 stacked along one side of the light emitting direction of the light guide plate 14. Specifically, the display module 1 further includes an optical film layer 13, a buffer layer 12 and a display panel 11, which are stacked and disposed on the light emitting surface 141 of the light guide plate 14, where the optical film layer 13 is used for reflecting the light provided by the light source, so that the light guide plate 14 guides the light. The buffer layer 12 is used for buffering the display panel 11 during installation, and may be foam tape. It should be noted that the material of the light guide plate 14 may be, for example, plastic, glass or composite material. The illumination light provided by the light source can be emitted from the light incident side (e.g. the side surface of the light guide plate 14) of the light guide plate 14 to the light emitting surface 141 by the total reflection characteristic of the light between the media. The first sound generating component 21 and the second sound generating component 22 are disposed on a side of the back plate 16 away from the backlight surface 142 of the light guide plate 14, and generate vibration through the through hole 161. Preferably, the vibration frequency of the vibration is in a range audible to human ears, for example, between 20 and 20000 hertz. In this embodiment, the first sound generating component 21 and the second sound generating component 22 may be directly attached to the back surface so that the vibration is transmitted to the light guide plate 14 via the through hole 161, that is, the vibration is indirectly transmitted to the light guide plate 14. Wherein the vibration is directly or indirectly transmitted to the light guide plate 14 to generate resonance on the light guide plate 14, and the through hole 161 is used as a resonance cavity. It should be noted that fig. 2 and 3 only illustrate a part of the first sound emitting component 21 and the second sound emitting component 22 for simplicity, however, the first sound emitting component 21 and the second sound emitting component 22 may be configured in plurality, and the utility model is not limited to the number of the first sound emitting component 21 and the second sound emitting component 22. By means of the arrangement, the loudspeaker can be arranged in the thinner space of the back side of the display device, and the display effect of the display device is not affected. In addition, the screen ratio of the display device can be increased through the arrangement.

As shown in fig. 2 and 3, the sound generating module 2 includes a first sound generating component 21 and a second sound generating component 22, where the first sound generating component 21 covers a portion of the through holes 161 in the at least one set of through holes 161, and the second sound generating component 22 covers another portion of the through holes 161 in the at least one set of through holes 161.

Illustratively, the first sounding assembly 21 is a high frequency sounding assembly, which can be understood as the first sounding assembly 21 is used for sounding at frequencies between 10kHz and 20kHz, and the sounding assembly for this frequency is referred to as a high frequency sounding assembly. The second sounding component 22 is a low-and-medium frequency sounding component, which can be understood as that the second sounding component 22 is used for sounding with the frequency between 20Hz and 9kHz, and the sounding component with the frequency is called a low-and-medium frequency sounding component. The first sounding component 21 covers one through hole 161 of the two through holes 161, and the second sounding component 22 covers the other through hole 161, so that the first sounding component 21 and the second sounding component 22 (namely the high-frequency sounding component and the middle-low frequency sounding component) can be matched for sounding, the sounding quality of the display device is better, the sounding effect of the LCD screen is improved to be poor, and the problems of clunkness, insufficient low-frequency vibration, insufficient middle-high frequency reduction degree, large distortion and the like are caused.

In this embodiment, as shown in fig. 2 and 3, the first sound generating component 21 and the light guide plate 14 form a first vibration cavity 162 in the portion of the through hole 161, the second sound generating component 22 and the light guide plate 14 form a second vibration cavity 163 in the other portion of the through hole 161, and vibrations generated by the first sound generating component 21 and the second sound generating component 22 are transmitted to the light guide plate 14 via the first vibration cavity 162 and the second vibration cavity 163, respectively.

Illustratively, the at least one set of through holes 161 includes two sets of through holes 161 symmetrically disposed on the back plate 16 along the dividing line b, each set of through holes 161 includes two through holes 161, at least one sound generating module 2 includes two sets of sound generating modules 2, each set of sound generating modules 2 includes a first sound generating component 21 and a second sound generating component 22, the first sound generating component 21 covers the through holes 161 disposed adjacent to the edge of the back plate 16, and the second sound generating component 22 covers the two adjacent through holes 161 in the middle. Thus, each group of sound emitting modules 2 is symmetrically arranged along the dividing line b. The first sound generating component 21 may be adhered to the back plate 16, and after the sound generating component 21 generates sound, a vibration cavity is formed in a corresponding through hole 161 on the back plate 16, that is, the first sound generating component 21 and the light guide plate 14 form a first vibration cavity 162 in the through hole 161, and after the sound generating component 21 generates sound, the first vibration cavity 162 is formed in the through hole 161 on the back plate 16 near the edge. The second sounding component 22 may be adhered to the back plate 16, after the second sounding component 22 sounds, a vibration cavity is formed in a corresponding through hole 161 on the back plate 16, that is, the second sounding component 22 and the light guide plate 14 form a second vibration cavity 163 in another through hole 161, and after the second sounding component 22 sounds, a second vibration cavity 163 is formed in the through hole 161 far away from the edge on the back plate 16, so that the first vibration cavity 162 and the second vibration cavity 163 are matched, two groups of sounding modules 2 can be matched to sound, and sounding components with different frequencies are included in each group of sounding modules 2, so that the sounding quality of the display device is better.

Fig. 4 shows a schematic partial cross-sectional view of an exemplary display device of the present utility model.

Referring to fig. 4, the first vibration chamber 162 and the second vibration chamber 163 form a sound channel, and the light guide plate 14 transmits vibration to the display module 1 via the sound channel. Specifically, the first sounding component 21 and the second sounding component 22 cooperate to sound, so that the first vibration cavity 162 formed by the first sounding component 21 and the through hole 161 and the second vibration cavity 163 formed by the second sounding component 22 and the other through hole 161 form a sound channel, different audios can be emitted in the sound channel, and thus, the sounding quality of the display device can be better due to cooperation of sounding components with different audios, and the problems of poor sounding effect of the LCD screen, clunkness, insufficient low frequency, insufficient middle-high frequency reduction degree, large distortion and the like are solved.

Illustratively, referring to fig. 4, the display device includes two sound emitting modules 2, and the two sound emitting modules 2 are used to form a left channel 011 and a right channel 012, respectively. Specifically, with continued reference to fig. 1 and 2, based on the dividing line b, the back plate 16 is provided with a set of through holes 161 on the left and right sides of the dividing line b, respectively, and two sounding modules 2, one sounding module 2 being provided on the through hole 161 on the left side and the other sounding module 2 being provided on the through hole 161 on the right side. The first sound generating component 21 is used for high-frequency sound generation, the second sound generating component 22 is used for medium-low frequency sound generation, the first sound generating component 21 is covered on a through hole 161 at the position, close to the edge, of the left side, the second sound generating component 22 is covered on a through hole 161 at the position, far away from the edge, the first sound generating component 21 and the through hole 161 form a first vibration cavity 162, and the second sound generating component 22 and the other through hole 161 form a second vibration cavity 163. As shown in fig. 2 in particular, the first and second vibration chambers 162 and 163 located on the left side form a left sound channel 011, and the first and second vibration chambers 162 and 163 located on the right side form a right sound channel 012.

In some embodiments, as shown in fig. 3 and 4, the first sound generating assembly 21 includes a diaphragm 212 and a vibrator 211 that are stacked along a side of the back plate 16 away from the light emitting direction, where an orthographic projection of the diaphragm 212 on the back plate 16 overlaps an orthographic projection of the through hole 161 on the back plate 16, and an orthographic projection of the vibrator 211 on the back plate 16 is in an orthographic projection of the through hole 161 on the back plate 16. Specifically, the diaphragm 212 and the vibrator 211 are stacked, and the vibrator 211 is disposed on a side of the diaphragm 212 away from the through hole 161, so that after the vibrator 211 sounds, the diaphragm 212 transmits the vibration emitted from the vibrator 211 into the through hole 161, and transmits the vibration to the light guide plate 14 through the through hole 161 to drive the light guide plate 14 to sound, thereby realizing the sound emission of the display device. Further, the orthographic projection of the diaphragm 212 on the back plate 16 overlaps with the orthographic projection of the through hole 161 on the back plate 16, and the orthographic projection of the vibrator 211 on the back plate 16 is in the orthographic projection of the through hole 161 on the back plate 16. Illustratively, the orthographic projection of the through hole 161 on the back plate 16 is located in the orthographic projection of the diaphragm 212 on the back plate 16, the orthographic projection of the vibrator 211 on the back plate 16 is located in the orthographic projection of the through hole 161 on the back plate 16, that is, the bottom area of the diaphragm 212 is larger than the plane area of the through hole 161, and the area of the vibrator 211 is smaller than the area of the through hole 161. In this way, a more stable vibration cavity can be formed among the vibration film 212, the through hole 161 and the light guide plate 14, so that the vibration force emitted by the vibration cavity is stronger, and the sound production effect of the display device is better. By way of example, vibrator 211 may employ any one of, but not limited to, a piezoelectric sensor, a piezoelectric ceramic driver, such as lead zirconate titanate (PZT) or a piezoelectric polymer. The material of the diaphragm 212 may be, for example, but not limited to, a metal sheet, cotton, rubber, or the like.

In some embodiments, as further shown in fig. 3 and 4, the second sound generating assembly 22 includes a sound generator 221 disposed on a side of the back plate 16 away from the light emitting direction, and an orthographic projection of the sound generator 221 on the back plate 16 overlaps an orthographic projection of the through hole 161 on the back plate 16.

Illustratively, the sounder 221 may be a speaker, and an adhesive layer 222 is disposed between the sounder 221 and the back plate 16. The adhesive layer 222 may be an adhesive tape or a buffer tape, and the adhesive tape may be any one of a double sided tape, a UV adhesive, an EVA adhesive, a TPU adhesive, and the like. It is also understood that the sound generator 221 is attached to the back plate 16 by an adhesive. The orthographic projection of the sounder 221 on the back plate 16 overlaps with the orthographic projection of the through hole 161 on the back plate 16, and the bottom area of the sounder 221 is larger than the plane area of the through hole 161, so that the sounder 221 can stably cover above the through hole 161 through the adhesive layer 222, vibration emitted by the sounder 221 is transmitted to the light guide plate 14 through the through hole 161, a more stable vibration cavity is formed among the sounder 221, the through hole 161 and the light guide plate 14, so that the vibration force emitted by the vibration cavity is stronger, the display device vibrates to sound, and the sound effect is better.

In some embodiments, as shown with continued reference to fig. 3 and 4, a reflective layer 15 is disposed between the light guide plate 14 and the back plate 16. Specifically, the reflective layer 15 is used to reflect light irradiated on the vibrator 211, the diaphragm 212, and the sounder 221. The light source is, for example, light reflected from the display panel 11 or the optical film layer 13 (optical film) between the light guide plate 14 and the display panel 11, but is not limited thereto. This arrangement may make the vibrator 211, the diaphragm 212, and the sound generator 221 located on the back plate 16 invisible on the display panel 11.

Fig. 5 shows a plot of the frequency response curve (Frequency Response, FR) of the material and thickness of the back plate versus sound quality.

As shown in fig. 5, the material of the back plate 16 may include an aluminum plate and an iron plate, wherein the thickness of the back plate 16 ranges from 0.8mm to 1.2mm. In the utility model, the test was performed by taking the example that the thickness of the back plate 16 of the aluminum plate (i.e., the aluminum back plate 16) was 0.8mm, the thickness of the back plate 16 of the aluminum plate (i.e., the aluminum back plate 16) was 1.2mm, and the thickness of the back plate 16 of the iron plate (i.e., the iron back plate 16) was 0.8mm, to obtain a frequency response graph. The abscissa in the frequency response graph represents the frequency, and the ordinate represents the impedance value.

Fig. 6 shows a plot of the lowest resonant frequency (e.g., F0 in fig. 6) of the material and thickness of the backplate versus sound quality.

As shown in fig. 6, the material of the back plate 16 may include an aluminum plate and an iron plate, wherein the thickness of the back plate 16 ranges from 0.8mm to 1.2mm. In the utility model, the lowest resonance frequency graph is obtained by taking the example that the thickness of the back plate 16 of the aluminum plate (namely, the aluminum back plate 16) is 0.8mm, the thickness of the back plate 16 of the aluminum plate (namely, the aluminum back plate 16) is 1.2mm and the thickness of the back plate 16 of the iron plate (namely, the iron back plate 16) is 0.8 mm. The abscissa in the lowest resonance frequency graph is frequency, and the ordinate is impedance value.

Fig. 7 shows a plot of total harmonic distortion (Total Harmonic Distortion, THD) of the material and thickness of the backplate versus sound quality.

As shown in fig. 7, the material of the back plate 16 shown in fig. 7 may include an aluminum plate and an iron plate, wherein the thickness of the back plate 16 ranges from 0.8mm to 1.2mm. In the utility model, the total harmonic distortion curve graph is obtained by taking the example that the thickness of the back plate 16 of the aluminum plate (namely, the aluminum back plate 16) is 0.8mm, the thickness of the back plate 16 of the aluminum plate (namely, the aluminum back plate 16) is 1.2mm and the thickness of the back plate 16 of the iron plate (namely, the iron back plate 16) is 0.8 mm. The abscissa in the total harmonic distortion graph is frequency, and the ordinate is impedance value.

Compared with the spectrum test result (shown in fig. 5), the lowest frequency test result (shown in fig. 6) and the lowest frequency test result (shown in fig. 7) of the back plate 16, the optimal test result is that the back plate 16 made of iron plate materials and having the thickness of 0.8mm is optimal. The backboard 16 made of an iron plate and having a thickness of 1mm may be used as the second best.

Fig. 8 shows a plot of the frequency response of the thickness of the light guide plate to the influence of sound quality.

As shown in fig. 8, the light guide plate 14 is shown in fig. 8 to have a thickness ranging from 1.5mm to 2mm. In the utility model, the light guide plate 14 with the thickness of 1.5mm and 2mm is taken as an example for testing, and a frequency response curve graph is obtained. The abscissa in the frequency response graph represents the frequency, and the ordinate represents the impedance value.

Fig. 9 shows a graph of the lowest resonance frequency of the thickness of the light guide plate with respect to the influence of sound quality.

As shown in fig. 9, the light guide plate 14 is shown in fig. 9 to have a thickness ranging from 1.5mm to 2mm. In the utility model, the light guide plate 14 with the thickness of 1.5mm and 2mm is taken as an example for testing, and the lowest resonance frequency graph is obtained. The abscissa in the lowest resonance frequency graph is frequency, and the ordinate is impedance value.

Fig. 10 shows a graph of total harmonic distortion of the influence of the thickness of the light guide plate on sound quality.

As shown in fig. 10, the light guide plate 14 is shown in fig. 10 to have a thickness ranging from 1.5mm to 2mm. In the utility model, the total harmonic distortion curve graph is obtained by taking the thickness of the light guide plate 14 as 1.5mm and 2mm as an example. The abscissa in the total harmonic distortion graph is frequency, and the ordinate is impedance value.

Compared with the spectrum test result (shown in fig. 8), the lowest frequency test result (shown in fig. 9) and the lowest frequency test result (shown in fig. 10) of the thickness of the light guide plate 14, the optimal test result is that the light guide plate 14 with the thickness of 2mm is optimal. The light guide plate 14 having a thickness of 1.5mm may be used as the second preferred.

Fig. 11 shows a plot of the frequency response of the buffer layer thickness versus sound quality.

As shown in FIG. 11, the thickness of the buffer layer 12 is shown in FIG. 11 to be in the range of 0.86mm to 1.26mm. The utility model takes buffer layer 12 with thickness of 0.86mm and 1.26mm as an example, wherein buffer layer 12 with common density of 0.86mm, low density of 0.86mm and common density of 1.26mm is adopted for testing, and a frequency response curve graph is obtained. The abscissa in the frequency response graph represents the frequency, and the ordinate represents the impedance value.

Fig. 12 shows a plot of the lowest resonance frequency of the buffer layer thickness versus sound quality.

As shown in FIG. 12, the thickness of the buffer layer 12 is shown in FIG. 12 to be in the range of 0.86mm to 1.26mm. The utility model takes buffer layer 12 thickness of 0.86mm and 1.26mm as an example, wherein the buffer layer 12 with common density of 0.86mm, low density of 0.86mm and common density of 1.26mm is adopted for testing, and the lowest resonance frequency graph is obtained. The abscissa in the lowest resonance frequency graph is frequency, and the ordinate is impedance value.

Fig. 13 shows a graph of total harmonic distortion of the impact of buffer layer thickness on sound quality.

As shown in FIG. 13, the thickness of the buffer layer 12 is shown in FIG. 13 to be in the range of 0.86mm to 1.26mm. The utility model takes buffer layer 12 with thickness of 0.86mm and 1.26mm as an example, wherein the test is carried out by adopting buffer layer 12 with common density of 0.86mm, low density of 0.86mm and common density of 1.26mm, and a total harmonic distortion curve graph is obtained. The abscissa in the total harmonic distortion graph is frequency, and the ordinate is impedance value.

Compared with the spectrum test result (shown in fig. 11), the lowest frequency test result (shown in fig. 12) and the lowest frequency test result (shown in fig. 13) of the thickness of the buffer layer 12, the optimal test result is that the buffer layer 12 with the thickness of 1.26mm is optimal. The buffer layer 12 having a thickness of 0.86mm may also be used as a second advantage.

Fig. 14 shows a plot of the frequency response of the effect of the diaphragm thickness on the sound quality.

As shown in FIG. 14, the diaphragm 212 is shown in FIG. 14 to have a thickness in the range of 0.3mm to 0.8mm. The utility model was tested using diaphragm 212 having a thickness of 0.3mm, 0.5mm and 0.8mm as an example to obtain a frequency response plot. The abscissa in the frequency response graph represents the frequency, and the ordinate represents the impedance value.

Fig. 15 shows a graph of total harmonic distortion of the influence of the thickness of the diaphragm on the sound quality.

As shown in FIG. 15, the diaphragm 212 is shown in FIG. 15 to have a thickness in the range of 0.3mm to 0.8mm. In the utility model, the thickness of the diaphragm 212 is 0.3mm, 0.5mm and 0.8mm, and the total harmonic distortion curve chart is obtained by testing. The abscissa in the total harmonic distortion graph is frequency, and the ordinate is impedance value.

Compared to the spectral test results (shown in fig. 14) and the lowest frequency test results (shown in fig. 15) of the thickness of the diaphragm 212, the optimal test results are that the diaphragm 212 having a thickness of 0.3mm is optimal.

Fig. 16 shows a plot of the frequency response of the via size to the sound quality.

Illustratively, the through-holes 161 are rectangular, with the width of the through-holes 161 ranging from 35mm to 55mm and the length of the through-holes 161 ranging from 55mm to 75mm. For example, the through hole 161 is defined as a small hole having a width of 35mm and a length of 55mm, the through hole 161 is defined as a medium hole having a width of 45mm and a length of 65mm, and the through hole 161 is defined as a large hole having a width of 55mm and a length of 75mm. As shown in fig. 16, the present utility model takes the through hole 161 as an example of a small hole, a medium hole and a large hole, and tests are performed to obtain a frequency response graph. The abscissa in the frequency response graph represents the frequency, and the ordinate represents the impedance value.

Fig. 17 shows a graph of the total harmonic distortion of the effect of via size on sound quality.

Illustratively, the through-holes 161 are rectangular, with the width of the through-holes 161 ranging from 35mm to 55mm and the length of the through-holes 161 ranging from 55mm to 75mm. For example, the through hole 161 is defined as a small hole having a width of 35mm and a length of 55mm, the through hole 161 is defined as a medium hole having a width of 45mm and a length of 65mm, and the through hole 161 is defined as a large hole having a width of 55mm and a length of 75mm. As shown in fig. 17, the present utility model takes the through hole 161 as a small hole, a middle hole and a large hole as examples, and tests are performed to obtain a total harmonic distortion graph. The abscissa in the total harmonic distortion graph is frequency, and the ordinate is impedance value.

Compared to the spectral test results (shown in fig. 16) and the lowest frequency test results (shown in fig. 17) of the size of the through hole 161, the optimal test results are that the large hole 161 is optimal. The through hole 161 of the mesopore may also be a second advantage.

It should be noted that the foregoing describes some embodiments of the present utility model. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments described above and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

It will be appreciated by persons skilled in the art that the foregoing discussion of any embodiment is merely exemplary and is not intended to imply that the scope of the utility model (including the claims) is limited to these examples, that combinations of technical features in the foregoing embodiments or in different embodiments may be implemented in any order and that many other variations of the different aspects of the embodiments described above exist within the spirit of the utility model, which are not provided in detail for clarity.

While the utility model has been described in conjunction with specific embodiments thereof, many alternatives, modifications, and variations of those embodiments will be apparent to those skilled in the art in light of the foregoing description. For example, other memory architectures may use the embodiments discussed.

The present embodiments are intended to embrace all such alternatives, modifications and variances which fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, and the like, which are within the spirit and principles of the embodiments of the utility model, are intended to be included within the scope of the utility model.

Claims (13)

1. A display device, comprising: A display module (1) comprises a light guide plate (14) and a back plate (16) which are stacked, wherein the back plate (16) is provided with at least one group of through holes (161); At least one sound module (2) is arranged on a side of the back plate (16) away from the light emitting direction of the display module (1), the sound module (2) comprising a first sound component (21) and a second sound component (22), the first sound component (21) covering a portion of the through holes (161) in the at least one group of through holes (161); the second sound component (22) covering another portion of the through holes (161) in the at least one group of through holes (161); The first sound-emitting component (21) and the light guide plate (14) form a first vibration cavity (162) in the part of the through hole (161), and the second sound-emitting component (22) and the light guide plate (14) form a second vibration cavity (163) in the other part of the through hole (161); the vibrations generated by the first sound-emitting component (21) and the second sound-emitting component (22) are respectively transmitted to the light guide plate (14) via the first vibration cavity (162) and the second vibration cavity (163). 2. The display device according to claim 1 is characterized in that the first vibration cavity (162) and the second vibration cavity (163) form a sound channel, and the light guide plate (14) transmits the vibration to the display module (1) via the sound channel. 3. The display device according to claim 1 or 2, characterized in that the display device comprises two sound modules (2), and the two sound modules (2) are respectively used to form a left channel (011) and a right channel (012). 4. The display device according to claim 1 is characterized in that the first sound-emitting component (21) comprises a vibration membrane (212) and a vibrator (211) which are stacked along a side of the back panel (16) away from the light emitting direction, the orthographic projection of the vibration membrane (212) on the back panel (16) overlaps with the orthographic projection of the through hole (161) on the back panel (16), and the orthographic projection of the vibrator (211) on the back panel (16) is within the orthographic projection of the through hole (161) on the back panel (16). 5. The display device according to claim 1 is characterized in that the second sound-emitting component (22) comprises a sound generator (221) arranged on a side of the back panel (16) away from the light emitting direction, and the orthographic projection of the sound generator on the back panel (16) overlaps with the orthographic projection of the through hole (161) on the back panel (16). 6. The display device according to claim 5, characterized in that an adhesive layer (222) is provided between the sound generator (221) and the back plate (16). 7. The display device according to claim 1, characterized in that the display module (1) further comprises an optical film layer (13), a buffer layer (12) and a display panel (11) stacked along one side of the light emitting direction of the light guide plate (14). 8. The display device according to claim 1, characterized in that a reflective layer (15) is provided between the light guide plate (14) and the back plate (16). 9. The display device according to claim 1, characterized in that the thickness of the back plate (16) ranges from 0.8 mm to 1.2 mm. 10. The display device according to claim 8, characterized in that the thickness of the light guide plate (14) is in the range of 1.5 mm to 2 mm. 11. The display device according to claim 7, characterized in that the thickness of the buffer layer (12) ranges from 0.86 mm to 1.26 mm. 12. The display device according to claim 4, characterized in that the thickness of the vibration film (212) ranges from 0.3 mm to 0.8 mm. 13. The display device according to claim 1, characterized in that the through hole (161) is rectangular, with a width ranging from 35 mm to 55 mm and a length ranging from 55 mm to 75 mm.