TWI706677B - Display device - Google Patents

Abstract

The present invention provides a display device. The display device includes a panel module and a speaker module. The panel module includes a display surface and a rear surface facing away from the display surface. The speaker module includes a speaker unit and a resonance chamber. The speaker unit is connected to the panel module, and the resonance chamber is situated at the rear surface of the panel module and connected to the speaker unit.

Description

Display device

The present invention relates to a display module, in particular to a display module with a speaker function.

Generally speaking, when the horn is actuated, the vibration mode will squeeze the air along the oscillation direction to produce two sound waves in opposite directions and opposite in phase. Therefore, when the listener is located on the side of the speaker unit, for example, when the speaker is installed on the display surface side of the flat display device, the user on the display surface can only receive the sound waves from the speaker in one direction, so the sound intensity is insufficient. problem. In addition, flat display devices such as TVs or computer screens are usually set with their backs against the wall, and when the wall reflects the sound waves emitted from the speaker toward the wall, it often interferes destructively with the sound waves in front of the diaphragm, resulting in degraded sound quality. Therefore, the display device with speaker function in the prior art still has defects and there is room for improvement.

In view of the above, the purpose of the present invention is to provide a display device in view of the shortcomings of the prior art, and solve the problems of insufficient sound intensity and poor sound quality of the speakers of the display device in the prior art by combining a speaker with the display device.

One of the technical solutions provided by the embodiments of the present invention is to provide a display device including a panel module and a speaker module. The panel module includes a display surface and a back surface opposite to the display surface. The speaker module includes a speaker unit and a resonant cavity. Loudly The unit is connected to the panel module, and the resonant cavity is located on the back of the panel module and connected to the speaker unit.

Another technical solution provided by the embodiments of the present invention is to provide a display device, which includes a panel module, a plurality of speaker modules, and a transparent isolation module. The panel module includes a display surface and a back surface opposite to the display surface. Each speaker module includes a speaker unit and a resonant cavity. The speaker unit is connected to the panel module. The resonant cavity is located on the back of the panel module and connected to the speaker unit.

In order to further understand the features and technical content of the present invention, please refer to the following detailed description and drawings about the present invention. However, the provided drawings are only for reference and description, and are not used to limit the present invention.

1000, 2000, 3000, 4000‧‧‧Display device

1‧‧‧Panel Module

101‧‧‧Display

102‧‧‧Back

11, 12, 13, 14‧‧‧end

2, 2A, 2B, 2C‧‧‧Speaker module

21‧‧‧Speaker unit

22, 22A, 22B‧‧‧Resonator

23‧‧‧Open

24‧‧‧Catheter

25‧‧‧Reflective tube

3‧‧‧Light guide structure

31‧‧‧Shell

301‧‧‧Inner surface

R‧‧‧Space

32‧‧‧Cover plate

3201‧‧‧The upper surface of the cover

3202‧‧‧The lower surface of the cover

4‧‧‧Transparent isolation components

L‧‧‧Backlight

A1, A1’‧‧‧First sound wave

A2‧‧‧Second sound wave

P‧‧‧Sonic path

D1, D2‧‧‧direction

FIG. 1 shows a schematic cross-sectional view of a display device according to a first embodiment of the invention.

FIG. 2 shows a schematic cross-sectional view of a display device according to a second embodiment of the invention.

FIG. 3 shows a schematic diagram of sound wave transmission of the display device according to the second embodiment of the present invention.

FIG. 4 shows a schematic cross-sectional view of a display device according to a third embodiment of the invention.

Fig. 5 shows a front view of a display device according to a fourth embodiment of the invention.

FIG. 6 shows a schematic cross-sectional view of the display device of FIG. 5 along the M-M section line.

FIG. 7 shows a schematic cross-sectional view of the display device of FIG. 5 along the N-N section line.

The following describes the implementation of the display device disclosed in the present invention through specific specific embodiments in conjunction with FIGS. 1 to 6. Those skilled in the art can understand the advantages and effects of the present invention from the content disclosed in this specification. However, the content disclosed below is not intended to limit the scope of protection of the present invention. Without departing from the spirit of the present invention, those skilled in the art can implement the present invention in other different embodiments based on different viewpoints and applications. In addition, it should be stated in advance that the drawings of the present invention are only schematic illustrations, and not depictions based on actual dimensions.

It should be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" or "connected" to another element, it can be directly on or connected to the other element, or Intermediate elements may also be present. In contrast, when an element is referred to as being "directly on" or "directly connected to" another element, there are no intervening elements. As used herein, "connected" can refer to physical and/or electrical connection. Furthermore, "electrically connected" or "coupled" may mean that there are other elements between two elements.

In addition, it should be understood that although the terms "first", "second", "third", etc. may be used herein to describe various elements, components, regions, layers and/or parts, these elements, components, regions, And/or part should not be restricted by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Therefore, the “first element”, “component”, “region”, “layer” or “portion” discussed below may be referred to as a second element, component, region, layer or section without departing from the teachings herein.

The terminology used herein is only for the purpose of describing specific embodiments and is not restrictive. As used herein, unless the content clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms, including "at least one." " Or "represents" and/or. As used herein, the term "and/or" includes any and all combinations of one or more related listed items. It should also be understood that when used in this specification, the term " "Include" and/or "include" designates the existence of the features, regions, wholes, steps, operations, elements and/or components, but does not exclude one or more other features, regions, wholes, steps, operations, elements, components, and / Or the presence or addition of a combination thereof.

In addition, relative terms such as "lower" or "bottom" and "upper" or "top" may be used herein to describe the relationship between one element and another element, as shown in the figure. It should be understood that relative terms are intended to include different orientations of the device other than those shown in the figures. For example, if the device in one figure is turned over, elements described as being on the "lower" side of other elements will be oriented on the "upper" side of the other elements. Therefore, the exemplary term “lower” may include an orientation of “lower” and “upper”, depending on the specific orientation of the drawing. Similarly, if the device in one figure is turned over, elements described as "below" or "beneath" other elements will be oriented "above" the other elements. Thus, the exemplary terms "below" or "below" can include an orientation of above and below.

First embodiment

The display device 1000 according to the first embodiment of the present invention will be described below with reference to FIG. 1. Please refer to FIG. 1, the display device 1000 of this embodiment includes a panel module 1 and a speaker module 2. The panel module 1 has a display surface 101 and a back surface 102 opposite to the display surface 101. In this embodiment, the panel module 1 is a non-self-luminous panel, such as a liquid crystal panel, however, the invention is not limited to this. The speaker module 2 has a speaker unit 21 and a resonant cavity 22. As shown in FIG. 1, the resonant cavity 22 is located on the back 102 of the panel module 1 and connected to the speaker unit 21; the speaker unit 21 is connected to the panel module 1.

Please refer to FIG. 1. Further, in this embodiment, the display device 1000 There is a light guide structure 3 for guiding the light of the backlight source L to the panel module 1. The light guide structure 3 includes a housing 31 and a cover 32. As shown in FIG. 1, the casing 31 and the cover plate 32 jointly form a space R, and the backlight source L is disposed on the inner surface 301 of the casing 31. In detail, the light guide structure 3 in this embodiment can be formed as an air guide plate (Air Guide), wherein the inner surface 301 of the housing 31 has high reflection characteristics, and the cover plate 32 preferably has the properties of a polarizer to be able to At least partially reflects light. Through the space R enclosed by the housing 31 and the cover plate 32 of the light guide structure 3, the light emitted by the backlight source L is reflected and transmitted between the lower surface 3202 of the cover plate 32 and the inner surface 301 of the housing 31, and passes from the cover plate 32. The upper surface 3201 is incident on the panel module 1.

Specifically, in the embodiment of FIG. 1, the speaker unit 21 is arranged on the housing 31 of the light guide structure 3, and the space R of the light guide structure 3 is used to surround the resonant cavity of the speaker unit 21. 22; that is, the space R in the light guide structure 3 is used as the resonant cavity 22 of the speaker unit 21, so that the speaker module 2 is integrated in the display device 1000. The embodiment of FIG. 1 implements the resonant cavity 22 of the speaker module 2 with a closed sound box; however, the present invention is not limited to this. In other embodiments, the space R in the housing 31 can also be used to form an inverted speaker, a labyrinth speaker, a box speaker, etc. The speaker unit 21 will generate a sound wave toward the display surface 101 side of the panel module 1 and the resonant cavity 22 respectively, and the sound wave generated toward the resonant cavity 22 will be opposite to the sound wave generated toward the display surface 101 side. In the embodiment of the present invention, the space R is used as the sealed resonant cavity 22 to absorb the inverted sound waves generated toward the resonant cavity 22, and avoid destructive interference of the sound waves before and after the panel module 1.

Through the above technical means, the present embodiment does not need to occupy an additional volume outside the display device 1000 for arranging a speaker, and the speaker function of the display device 1000 can be achieved. In addition, the reverse sound wave generated by the speaker unit 21 toward the resonant cavity 22 can be absorbed by the resonant cavity 22 without destructive interference with the sound wave generated by the speaker unit 21 on the side of the display surface 101. The problem of poor sound quality of the speaker of the display device in the prior art is solved.

Second embodiment

The display device 2000 according to the second embodiment of the present invention will be described below with reference to FIGS. 2 and 3. First, please refer to FIG. 2. The main difference between this embodiment and the first embodiment is that: in the first embodiment, the resonant cavity 22 is a closed sound box, and in this embodiment, the resonant cavity 22 of the speaker module 2A is An inverted speaker. In detail, as shown in FIG. 2, the speaker module 2A of this embodiment has an opening 23 formed in the resonant cavity 22, and a pipe 24 disposed in the resonant cavity 22 and connected to the opening 23.

Please refer to FIG. 3. In this embodiment, the opening 23 and the conduit 24 serve as an inverting hole and an inverting tube, respectively. In detail, when the speaker unit 21 acts to generate a first acoustic wave A1 into the resonant cavity 22, and at the same time, a second acoustic wave A2 is generated outside the resonant cavity 22 that is in antiphase with the first acoustic wave A1. The inner surface 301 of 31 reflects and becomes a sound wave A1' in the same phase as the second sound wave A2. The reflected first acoustic wave A1' transmits toward the duct 24, leaves the resonant cavity 22 through the duct 24 and the opening 23, and forms constructive interference with the second acoustic wave A2 outside the display device 2000.

In this embodiment, the volume V of the resonant cavity 22 preferably conforms to the following equation (1):

In the above formula, a is the effective vibration radius of the speaker unit 21, α is the vibration suppression parameter of the speaker unit 21, f ₀ is the free resonance frequency of the speaker unit 21, and m ₀ is the speaker unit 21 The equivalent quality. Generally speaking, the vibration suppression parameter α of the speaker unit 21 is related to the Q value of the speaker unit 21, that is, the resonance quality factor of the speaker unit 21 at the free resonant frequency f ₀ . The Q value can be obtained from the impedance-frequency curve of the speaker unit 21. The vibration suppression parameter α is generally between 0.3 and 5. However, the present invention is not limited to this.

Furthermore, in the preferred embodiment of the present invention, the length L of the catheter 24 conforms to the following formula (2):

In the above formula, V is the volume of the resonant cavity 22, S is the cross-sectional area of the opening 23, and f _b is the resonant frequency of the resonant cavity 22. In this embodiment, by adjusting the volume of the resonant cavity 22 and the design of the length of the duct 24, the space R formed by the light guide structure 3 can be used as an inverted box of the speaker unit 21, so that the first sound wave A1 and The second sound wave A2 forms constructive interference on the display surface 101 side of the panel module 1 to improve the efficiency of the speaker unit 21 and the sound quality of the speaker module 2A.

Furthermore, in this embodiment, by making the volume V of the resonant cavity 22 and the length L of the duct 24 conform to the above-mentioned formulas (1) and (2), the display device 2000 can reach the resonant frequency f conforming to the following formula _b : f _b = c×f ₀ , where c is a constant between 0.8 and 1.2

It should be noted that in this embodiment, the speaker unit 21 is arranged to face the same direction as the display surface 101 of the panel module 1. As shown in FIG. 3, the speaker unit 21 and the panel module 1 are both located in the housing. 31 on the same side, so that the speaker unit 21 emits sound toward the display direction of the panel module 1. However, the present invention is not limited to this. For example, in other embodiments, the speaker unit 21 may be arranged on the side of the housing 31 away from the panel module 1 and sound backward, or arranged on the upper, lower, right, and right sides of the housing 31 and facing the display device 2000. The top, bottom, left, and right sides of the sound.

In addition, in this embodiment, the speaker unit 21 and the opening 23 are respectively disposed at the opposite ends 11 and 12 of the panel module 1. However, the present invention is not limited to this. In other In the embodiment, as long as the relative position of the speaker unit 21 and the opening 23 on the housing allows the first sound wave A1 emitted by the speaker unit 21 to be reflected in the resonant cavity 22, pass through the duct 24 and the opening 23, and then The constructive interference between the display device 2000 and the second sound wave A2 is within the scope of the present invention.

Through the above technical means, this embodiment adjusts the volume of the resonant cavity 22 and the length of the tube 24 and other parameters, that is, the volume of the space R formed by the light guide structure 3 and the length of the tube 24. , In order to solve the problem of poor sound quality caused by destructive interference formed by the inverted sound waves on the front and rear sides of the speaker of the display in the prior art.

The third embodiment

The display device 3000 according to the third embodiment of the present invention will be described below with reference to FIG. 4. The difference between the embodiment of FIG. 4 and the second embodiment is that the embodiment of FIG. 4 uses a labyrinth sound box as an example of the resonant cavity 22. In detail, please refer to FIG. 4, the speaker module 2B of this embodiment further includes at least one reflection tube 25. The reflection tube 25 is disposed in the resonant cavity 22 and located between the speaker unit 21 and the opening 23. In detail, in this embodiment, the reflection tube 25 is disposed on the inner surface 301 of the housing 31 of the light guide structure 3 and is located on the transmission path P of the first sound wave A1 from the speaker unit 21 to the opening 23. In the embodiment of FIG. 4, four reflecting tubes 25 are taken as an example, however, the present invention is not limited to this. In addition, in practice, the reflecting tube 25 can be made of a light-transmissive material, or it can be arranged in an area corresponding to the non-display area of the panel module 1 in the housing, or it can be arranged on the non-main light transmission path in the space R. , In order to reduce the influence on the light transmission of the light guide structure 3.

By arranging the reflection tube 25 in the resonant cavity 22, the path length of the first acoustic wave A1 in the resonant cavity 22 can be extended and adjusted, so that the first acoustic wave A1 leaves the resonance from the opening 23. When the cavity 22 is vibrated, it is in phase with the second sound wave A2 outside the display device 3000, so that the first sound wave A1' and the second sound wave A2 form constructive interference outside the display device 3000. In this way, the resonant cavity 22 of this embodiment can also have the same inversion effect as the second embodiment, so that the first sound wave generated by the speaker unit 21 in the resonant cavity 22 and the second sound wave generated outside the display device 3000 are formed. Constructive intervention.

Fourth embodiment

The display device 4000 according to an embodiment of the present invention will be described below with reference to FIGS. 5 to 7. 6 shows a schematic cross-sectional view of the display device of FIG. 5 along the MM section line, wherein FIG. 6 is a cross-sectional view of the display device 4000 viewed in the first direction D1 in FIG. 5; FIG. 7 shows the display device of FIG. 5 along the NN section line A schematic cross-sectional view, in which FIG. 7 is a cross-sectional view of the display device 4000 viewed in the second direction D2 of FIG. 5. The resonant cavity of this embodiment and the resonant cavity of the second embodiment are also realized by an inverter box. Please refer to FIG. 6 and FIG. 7 together. The main difference between this embodiment and the second embodiment is that this embodiment may have a plurality of speaker modules 2C. In this embodiment, the display device 4000 includes two speaker modules 2C. Each speaker module 2C has a speaker unit 21, a corresponding resonant cavity (22A, 22B), an opening 23, and a duct 24. In this embodiment, each speaker unit 21 is respectively disposed at the opposite ends 11 and 12 of the panel module 1. As shown in FIG. 6, the display device 4000 further includes a light-transmitting isolation component 4, which is disposed between two adjacent resonant cavities 22A and 22B. In detail, the light-transmitting isolation component 4 is disposed in the light guide structure 3, so that the space R surrounded by the light guide structure 3 is divided into two adjacent resonant cavities 22A, 22B, and two spatially independent resonant cavities 22A, 22B The sound waves emitted by the speaker units 21 of the speaker modules 2C in the display device 4000 are prevented from interfering with each other. In addition, the light-transmitting isolation component 4 is made of a light-transmitting material to prevent the light-transmitting isolation component 4 from blocking the light emitted by the backlight source L while isolating sound waves. It is worth mentioning that this embodiment takes two speaker modules 2C as an example. However, the present invention is not limited to this. In other embodiments, the display device 4000 may also include more than three speaker modules 2C, and the transparent isolation component 4 may include, for example, more than two transparent isolation walls, each The transparent isolation wall is arranged between two adjacent resonant cavities. In addition, the display device 4000 of this embodiment can also be implemented as the resonant cavity of the third embodiment.

Referring to FIG. 7, in detail, in each speaker module 2C in this embodiment, the speaker unit 21 and the opening 23 are respectively correspondingly disposed at the two ends 13 and 14 of the panel module 1. The sound waves generated by each speaker unit 21 toward the lower surface 3202 side of the cover plate 32 will be reflected on the inner surface 301 of the corresponding resonant cavity (22A or 22B, the resonant cavity 22B through which the tangent line NN passes) and transmitted to the adjacent The duct 24 at one end 14 of the panel finally leaves the display device 4000 through the duct 24 and the opening 23. By designing the volume of the resonant cavities 22A, 22B and the length of the duct 24, this embodiment can also enable the resonant cavities 22A, 22B to have the function of an inverted box, that is, the speaker unit 21 generates the sound in the resonant cavities 22A, 22B. After the sound waves leave the display device 4000, they constructively interfere with the sound waves generated by the speaker unit 21 outside the display device 4000.

In summary, the embodiment of the present invention integrates the speaker module into the display device through the technical solution that the speaker unit is connected to the panel module and the resonant cavity is located at the back of the panel module and connected to the speaker unit.

The content disclosed above is only the preferred and feasible embodiments of the present invention, and does not limit the scope of the patent application of the present invention. Therefore, all equivalent technical changes made by using the description and schematic content of the present invention fall into the application of the present invention. Within the scope of the patent.

1000‧‧‧Display device

1‧‧‧Panel Module

101‧‧‧Display

102‧‧‧Back

2‧‧‧Speaker module

21‧‧‧Speaker unit

22‧‧‧Resonator

3‧‧‧Light guide structure

31‧‧‧Shell

301‧‧‧Inner surface of shell

R‧‧‧Space

32‧‧‧Reflector

3201‧‧‧Upper surface of reflector

3202‧‧‧Lower surface of reflector

L‧‧‧Backlight

Claims (9)

A display device includes: a panel module including a display surface and a back surface opposite to the display surface; a speaker module including: a speaker unit connected to the panel module And a resonant cavity, located on the back of the panel module and connected to the speaker unit; a light guide structure, the light guide structure surrounds the resonant cavity; and a backlight source disposed in one of the resonant cavity Surface, wherein a light emitted from the backlight source enters the panel module from the back surface of the panel module, and emits the panel module from the display surface. The display device according to claim 1, wherein a volume V of the resonant cavity meets the following relationship: V~

, Where a is an effective vibration radius of the speaker unit, α is a vibration suppression parameter of the speaker unit, f ₀ is a free resonance frequency of the speaker unit, m _{0 is} the speaker unit An equivalent mass of the body. The display device according to claim 2, wherein the speaker module further includes an opening formed in the resonant cavity and a pipe arranged in the resonant cavity, wherein the pipe is connected to the opening. The display device according to claim 3, wherein the speaker unit is generated in the resonant cavity A first sound wave and a second sound wave are generated outside the display device, and the first sound wave and the second sound wave form constructive interference outside the display device. The display device according to claim 3, wherein a length L of the duct meets the following relationship:

, Where S is a cross-sectional area of the opening, and f _b is a resonance frequency of the resonant cavity. The display device according to claim 5, wherein the resonance frequency complies with the following relationship: f _b =c×f ₀ , where c is a constant between 0.8 and 1.2. The display device according to claim 3, wherein the speaker unit and the opening are respectively disposed at opposite ends of the panel module. The display device according to claim 7, wherein the speaker module further includes at least one reflection tube, and the at least one reflection tube is disposed in the resonant cavity and located between the speaker unit and the opening. A display device includes: a panel module, the panel module includes a display surface, and a back surface opposite to the display surface; a plurality of speaker modules, each speaker module includes: a speaker unit Body, connected to the panel module; and a resonant cavity, located on the back of the panel module and connected to the speaker unit; a light-transmitting isolation component, disposed in the resonant cavities of the speaker modules between; A light guide structure surrounding the resonant cavities; and a backlight source disposed on an inner surface of the resonant cavities, wherein a light beam emitted from the backlight source enters from the back of the panel module The panel module is ejected from the display surface.

Images