CN117789663A - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
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- CN117789663A CN117789663A CN202410133491.0A CN202410133491A CN117789663A CN 117789663 A CN117789663 A CN 117789663A CN 202410133491 A CN202410133491 A CN 202410133491A CN 117789663 A CN117789663 A CN 117789663A
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- 238000010438 heat treatment Methods 0.000 claims description 56
- 229910052751 metal Inorganic materials 0.000 claims description 33
- 239000002184 metal Substances 0.000 claims description 33
- 238000007789 sealing Methods 0.000 claims description 26
- 239000011261 inert gas Substances 0.000 claims description 24
- 239000013307 optical fiber Substances 0.000 claims description 20
- 239000011324 bead Substances 0.000 claims description 11
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 6
- 239000004020 conductor Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 5
- 230000007423 decrease Effects 0.000 description 13
- 238000010586 diagram Methods 0.000 description 11
- 230000033228 biological regulation Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 230000003287 optical effect Effects 0.000 description 5
- 239000007789 gas Substances 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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Abstract
The application discloses backlight module and display device, the backlight module includes backplate, light guide plate, first lamp strip and second lamp strip, and the light guide plate sets up on the bottom plate of backplate, and first lamp strip and second lamp strip all set up on the curb plate of backplate, and the light-emitting side of first lamp strip and the light-emitting side of second lamp strip all face towards the same side of light guide plate; the backlight module further comprises a current adjusting module, wherein the current adjusting module comprises an input end, a first output end and a second output end; the first output end is connected with the first light bar, and the second output end is connected with the second light bar; the current adjusting module monitors the brightness difference between the first light bar and the second light bar and adjusts the current of the first output end and the current of the second output end so that the brightness of the first light bar and the brightness of the second light bar tend to be consistent. Through the design, the brightness difference of the first light bar and the second light bar is solved, and the display effect of the picture is improved.
Description
Technical Field
The application relates to the technical field of display, in particular to a backlight module and a display device.
Background
Display technology has long been one of the important research directions in electronic devices. In terms of the working principle of the liquid crystal display device, the liquid crystal display device consists of a backlight module and a display panel, and the display panel cannot emit light, so that the backlight module is required to provide a backlight source for the display panel, so that dynamic display pictures can be seen, and the types of the backlight module widely used at present are divided into two main types of direct type backlight modules and side-entering type backlight modules.
In large-scale display device, the side income formula backlight unit who adopts provides the backlight by two lamp strips together usually, because there is the production difference two lamp strips, is difficult to guarantee that the luminance of giving out light of two lamp strips is unanimous, leads to display panel's left and right sides to appear luminance difference, brings relatively poor experience for user's impression.
Disclosure of Invention
The purpose of the application is to provide a backlight module and a display device, solve the brightness difference, improve the display effect of picture.
The application discloses backlight module, the backlight module includes backplate, light guide plate, first lamp strip and second lamp strip, the light guide plate sets up on the bottom plate of backplate, first lamp strip with the second lamp strip all sets up on the curb plate of backplate, just the light-emitting side of first lamp strip with the light-emitting side of second lamp strip all is towards the same side of light guide plate;
the backlight module further comprises a current adjusting module, wherein the current adjusting module comprises an input end, a first output end and a second output end; the first output end is connected with the first light bar, and the second output end is connected with the second light bar;
the current adjusting module monitors brightness difference between the first light bar and the second light bar and adjusts the current of the first output end and the current of the second output end so that the brightness of the first light bar and the brightness of the second light bar tend to be consistent.
Optionally, the current regulation module includes a housing, a sealing member and a sliding resistance-changing structure, the sliding resistance-changing structure is connected with an inner wall of the housing, the sealing member is connected with the sliding resistance-changing structure in a sliding manner, and divides the housing into two non-communicated chambers, namely a first chamber and a second chamber, and inert gas is filled in the first chamber and the second chamber;
the sealing element is a conductor, one end of the sealing element is connected with the input end, and the other end of the sealing element is connected with the first output end and the second output end through the sliding resistance-changing structure; when the sealing element moves towards the direction of the first output end, the resistance of the first output end is reduced, the current is increased, the resistance of the second output end is increased, and the current is reduced; when the sealing element moves towards the direction of the second output end, the resistance of the first output end is increased, the current is reduced, the resistance of the second output end is reduced, and the current is increased;
a photosensitive heating structure is arranged in the first cavity and the second cavity, light on the first lamp strip irradiates the photosensitive heating structure in the first cavity, the photosensitive heating structure heats up, and the inert gas in the first cavity is heated; the light on the second lamp strip irradiates the photosensitive heating structure in the second cavity, the photosensitive heating structure heats up, and the inert gas in the second cavity is heated; to control the reciprocating movement of the seal between the first output and the second output.
Optionally, the photosensitive heating structure includes a metal rod, a plurality of light channels are disposed on a side of the casing facing the light guide plate, light on the first light bar irradiates the metal rod in the first chamber through the corresponding light channels, and the metal rod heats up to expand inert gas in the first chamber; and the light rays on the second light bar irradiate onto the metal rod in the second cavity through the corresponding light channel, and the metal rod is heated to expand the inert gas in the second cavity.
Optionally, the direction of the first light bar towards the light guide plate is taken as a first direction, and along the first direction, the cross-sectional area of the light channel is gradually reduced.
Optionally, the current adjusting module further comprises a convex lens, and the convex lens is arranged in the light channel, so that light passing through the light channel is converged on the metal rod.
Optionally, the inner wall of the light channel is provided with a phosphor layer.
Optionally, the photosensitive heating structure includes a metal rod, the current adjusting module further includes a first optical fiber and a second optical fiber, one end of the first optical fiber faces the light emitting surface of one lamp bead on the first lamp strip, and the other end faces the metal rod in the first chamber; one end of the second optical fiber faces the light emitting surface of one lamp bead on the second lamp strip, and the other end of the second optical fiber faces the metal rod in the second cavity.
Optionally, the photosensitive heating structure includes a heating wire and a photoresistor, the heating wire and the photoresistor are arranged in series, the heating wire is located in the cavity, and the photoresistor is arranged on the outer surface of the shell;
the light of the first light bar irradiates onto the photoresistors corresponding to the first chamber, and the light of the second light bar irradiates onto the photoresistors corresponding to the second chamber.
Optionally, the photosensitive heating structure in the first chamber and the photosensitive heating structure in the second chamber are arranged in parallel.
The application also discloses a display device, the display device includes display panel and backlight unit, backlight unit is for display panel provides backlight.
For the existing large-size display device, the first light bar and the second light bar are respectively connected to the first output end and the second output end of the current adjusting module, and when the current adjusting module monitors that the brightness corresponding to the first light bar and the brightness corresponding to the second light bar are different, the brightness of the first light bar and the brightness of the second light bar are controlled by adjusting the current values of the first output end and the second output end, so that the brightness difference between the first light bar and the second light bar is balanced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained from these drawings without inventive faculty for a person skilled in the art. In the drawings:
FIG. 1 is a schematic diagram of a display device according to an embodiment of the present application;
fig. 2 is a schematic diagram of a backlight module according to a first embodiment of the present application;
FIG. 3 is a schematic diagram of a current regulation module of a first embodiment of the present application;
FIG. 4 is a schematic view of an optical channel according to a first embodiment of the present application;
FIG. 5 is a schematic illustration of an optical fiber of a first embodiment of the present application;
fig. 6 is a schematic diagram of a backlight module according to a second embodiment of the present application;
fig. 7 is a schematic view of a photosensitive heating structure in two chambers according to a second embodiment of the present application.
10, a display device; 20. a display panel; 30. a backlight module; 31. a back plate; 32. a light guide plate; 110. a first light bar; 120. a second light bar; 200. a current regulation module; 210. an input end; 221. a first output terminal; 222. a second output terminal; 300. a housing; 310. a first chamber; 320. a second chamber; 330. an optical channel; 331. a convex lens; 332. a phosphor layer; 400. a seal; 500. a sliding resistance-changing structure; 610. a first optical fiber; 620. a second optical fiber; 700. a photosensitive heating structure; 710. a metal rod; 721. a heating wire; 722. a photoresistor.
Detailed Description
It should be understood that the terminology, specific structural and functional details disclosed herein are merely representative for purposes of describing particular embodiments, but that the application may be embodied in many alternate forms and should not be construed as limited to only the embodiments set forth herein.
In the description of the present application, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating relative importance or implicitly indicating the number of technical features indicated. Thus, unless otherwise indicated, features defining "first", "second" may include one or more such features either explicitly or implicitly; the meaning of "plurality" is two or more. The terms "comprises," "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion, such that one or more other features, integers, steps, operations, elements, components, and/or groups thereof may be present or added.
In addition, terms of the azimuth or positional relationship indicated by "center", "lateral", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., are described based on the azimuth or relative positional relationship shown in the drawings, are merely for convenience of description of the present application, and do not indicate that the apparatus or element referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present application.
Furthermore, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or in communication with each other. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
The present application is described in detail below with reference to the attached drawings and alternative embodiments.
Fig. 1 is a schematic diagram of a display device according to an embodiment of the present application, and as shown in fig. 1, the present application discloses a display device 10, where the display device 10 includes a display panel 20 and a backlight module 30, and the backlight module 30 provides backlight for the display panel 20.
The technical solution of the present application can be widely applied to various display panels 20, such as a TN (Twisted Nematic) display panel 20, an IPS (In-Plane Switching) display panel 20, a VA (Vertical Alignment) display panel 20, an MVA (Multi-Domain Vertical Alignment) display panel 20, and the above solutions can be applied.
The application also discloses a backlight module 30, backlight module 30 can be arranged in the above-mentioned display device 10, aiming at backlight module 30, this application provides following design:
example 1:
fig. 2 is a schematic diagram of a backlight module according to a first embodiment of the present application, as shown in fig. 2, an arrow in the diagram is a propagation route diagram of a part of light, the backlight module 30 is a side-in backlight module, and the present application discloses a backlight module 30, the backlight module 30 includes a back plate 31, a light guide plate 32, a first light bar 110 and a second light bar 120, the light guide plate 32 is disposed on a bottom plate of the back plate 31, the first light bar 110 and the second light bar 120 are both disposed on a side plate of the back plate 31, and a light-emitting side of the first light bar 110 and a light-emitting side of the second light bar 120 are both oriented to the same side of the light guide plate 32.
Because there is a production difference between the first light bar 110 and the second light bar 120, it is difficult to ensure that the light-emitting brightness of the first light bar 110 and the second light bar 120 is consistent, resulting in brightness difference between the left and right images of the display panel 20, and poor experience is brought to the user's look and feel.
Therefore, by adding the current adjusting module 200 to the backlight module 30, the current adjusting module 200 includes an input end 210, a first output end 221 and a second output end 222; the first output 221 is connected to the first light bar 110, and the second output 222 is connected to the second light bar 120. The current adjusting module 200 monitors the brightness difference between the first light bar 110 and the second light bar 120, and adjusts the current of the first output terminal 221 and the second output terminal 222, so that the brightness of the first light bar 110 and the brightness of the second light bar 120 tend to be consistent, and the brightness of the left and right images also remains consistent when the display panel 20 displays images.
Illustratively, when the brightness of the first light bar 110 is detected to be greater than the brightness of the second light bar 120, the current adjustment module 200 controls the current of the first output terminal 221 to decrease and synchronously controls the current of the second output terminal 222 to increase; when the brightness of the first light bar 110 is detected to be smaller than the brightness of the second light bar 120, the current adjusting module 200 controls the current of the first output terminal 221 to increase, and synchronously controls the current of the second output terminal 222 to decrease.
Wherein the input terminal 210 is connected to an external power source, and current flows through the input terminal 210, and flows to the first output terminal 221 and the second output terminal 222, respectively. The greater the current flowing through the first light bar 110, the greater the brightness of the first light bar 110, and the corresponding lesser the current flowing through the second light bar 120, and vice versa.
Compared to the existing large-sized display device 10, the first light bar 110 and the second light bar 120 are respectively connected to the first output end 221 and the second output end 222 of the current adjusting module 200, and when the current adjusting module 200 monitors that the brightness corresponding to the first light bar 110 and the brightness corresponding to the second light bar 120 are different, the brightness of the first light bar 110 and the brightness of the second light bar 120 are controlled by adjusting the current values of the first output end 221 and the second output end 222, so that the brightness difference between the first light bar 110 and the second light bar 120 is balanced.
Moreover, even when leaving the factory, just connect in two different circuits with first lamp strip 110 and second lamp strip 120 to adjust the luminance between first lamp strip 110 and the second lamp strip 120, after using for a period of time, can lead to appearing the problem of first lamp strip 110 and second lamp strip 120 luminance difference owing to the life-span decay difference of first lamp strip 110 and second lamp strip 120 at any one time, consequently through the design of this application, can real-time supervision luminance difference between first lamp strip 110 and the second lamp strip 120 to adjust, thereby improve the display effect of picture.
Fig. 3 is a schematic diagram of a current regulation module according to a first embodiment of the present application, as shown in fig. 3, the current regulation module 200 includes a housing 300, a sealing member 400, and a sliding resistance variable structure 500, the sliding resistance variable structure 500 is connected to an inner wall of the housing 300, the sealing member 400 is slidably connected to the sliding resistance variable structure 500, and divides the housing 300 into two non-communicating chambers, namely, a first chamber 310 and a second chamber 320, and inert gas is filled in each of the first chamber 310 and the second chamber 320.
The sealing element 400 is a conductor, one end of the sealing element 400 is connected with the input end 210, and the other end of the sealing element 400 is connected with the first output end 221 and the second output end 222 through the sliding resistance variable structure 500; when the seal 400 moves toward the first output 221, the resistance of the first output 221 decreases, the current increases, the resistance of the second output 222 increases, and the current decreases; when the seal 400 moves toward the second output terminal 222, the resistance of the first output terminal 221 increases, the current decreases, the resistance of the second output terminal 222 decreases, and the current increases.
A photosensitive heating structure 700 is disposed in each of the first chamber 310 and the second chamber 320, the light on the first light bar 110 irradiates the photosensitive heating structure 700 in the first chamber 310, the photosensitive heating structure 700 heats up, and the inert gas in the first chamber 310 is heated up; the light on the second light bar 120 irradiates the photosensitive heating structure 700 in the second chamber 320, the photosensitive heating structure 700 heats up, and the inert gas in the second chamber 320 is heated; to control the reciprocating movement of the sealing member 400 between the first output 221 and the second output 222.
The sliding resistance variable structure 500 includes a resistance wire, and the sealing member 400 reciprocates between the first output end 221 and the second output end 222, so that the magnitude of the current flowing through the first light bar 110 and the second light bar 120 can be adjusted, and the brightness of the first light bar 110 and the second light bar 120 can be controlled.
The photosensitive heating structure 700 heats the inert gas in the chamber after heating, and the inert gas expands after heating to push the sealing member 400 to move, so that the sealing member 400 moves to adjust the current on the first light bar 110 and the second light bar 120.
Exemplary: the brightness of the first light bar 110 is greater than the brightness of the second light bar 120, so that the temperature of the light-sensitive heating structure 700 in the first chamber 310 is greater than the temperature of the light-sensitive heating structure 700 in the second chamber 320, and the corresponding expansion volume of the inert gas in the first chamber 310 is greater than the expansion volume of the inert gas in the second chamber 320, so as to push the sealing member 400 to move towards the second chamber 320, and further increase the resistance between the input end 210 and the first output end 221, decrease the current, decrease the brightness of the first light bar 110, decrease the resistance between the input end 210 and the second output end 222, increase the current, and increase the brightness output to the second light bar 120, thereby realizing the effect of balancing the brightness of the first light bar 110 and the brightness of the second light bar 120.
The photosensitive heating structure 700 includes a metal rod 710, preferably a copper rod or an aluminum rod, a plurality of light channels 330 are disposed on a side of the housing 300 facing the light guide plate 32, the light on the first light bar 110 is irradiated onto the metal rod 710 in the first chamber 310 through the corresponding light channels 330, and the metal rod 710 heats up to expand the inert gas in the first chamber 310; the light on the second light bar 120 irradiates the metal rod 710 in the second chamber 320 through the corresponding light channel 330, and the metal rod 710 heats up to expand the inert gas in the second chamber 320.
Wherein, the housing 300 may be made of a light-impermeable material, the light channel 330 may be a hole formed on the housing 300, and then the light channel 330 is filled with the light-impermeable material, so as to ensure the tightness of the first chamber 310 and the second chamber 320; it may also be that the housing 300 is made of a light-transmitting material, and then a layer of light-shielding material is coated on the outer surface of the housing 300, and the light-shielding material is not coated at the position corresponding to the light channel 330, so that the light can enter the first chamber 310 or the second chamber 320 through the corresponding light channel 330.
Preferably, the light channels 330 on the first chamber 310 are equidistantly arranged at intervals, and the light channels 330 on the second chamber 320 are equidistantly arranged at intervals; the light irradiates the metal rod 710 to heat the inert gas in the chamber, so that the adjustment is more direct and the structure is simpler.
In order to facilitate more light entering the cavity through the light channel 330, the shape of the light channel 330 of the present application gradually increases from inside to outside, specifically as follows:
fig. 4 is a schematic view of a light channel according to the first embodiment of the present application, as shown in fig. 4, in which an arrow indicates a path of a part of light, and a direction of the first light bar 110 toward the light guide plate 32 is a first direction, along which a cross-sectional area of the light channel 330 gradually decreases. So that more light can enter the light tunnel 330.
Further, a convex lens 331 may be added in the optical channel 330, where the current adjusting module 200 further includes the convex lens 331, and the convex lens 331 is disposed in the optical channel 330, so that the light passing through the optical channel 330 is converged on the metal rod 710.
When light passes through the light channel 330, the scattered light is converged on the metal rod 710 by the converging action of the convex lens 331, so that the brightness difference between the first light bar 110 and the second light bar 120 can be easily detected even under the condition that the light of the first light bar 110 and the second light bar 120 is low.
A phosphor layer 332 may also be provided on the inner wall of the light tunnel 330. The phosphor layer 332 is coated on the inner wall of the light channel 330 by a coating method, and when the light irradiates the inner wall of the light channel 330, the phosphor layer 332 is excited to emit light, so that more light exists in the light channel 330, the metal temperature of the metal rod 710 is accelerated, and the adjustment speed is increased.
Fig. 5 is a schematic diagram of an optical fiber according to the first embodiment of the present application, as shown in fig. 5, since the same light bar, for example, the first light bar 110, when shipped, the difference of light emitted by each light bead on the first light bar 110 is set within an allowable threshold, so that the brightness of each light bead on the first light bar 110 is the same, and the brightness of each light bead on the second light bar 120 is the same.
The current adjusting module 200 is directly disposed at one side of the light guide plate 32, so that external light is easy to interfere, and therefore, the application further adds a first optical fiber 610 and a second optical fiber 620, wherein one end of the first optical fiber 610 faces the light emitting surface of one lamp bead on the first lamp strip 110, and the other end faces the metal rod 710 in the first chamber 310; one end of the second optical fiber 620 faces the light emitting surface of one of the light beads on the second light bar 120, and the other end faces the metal rod 710 in the second chamber 320.
In short, the light emitted by one light bead on the first light bar 110 is directly guided to the metal rod 710 in the first chamber 310 through the first optical fiber 610, and the light emitted by one light bead on the second light bar 120 is directly guided to the metal rod 710 in the second chamber 320 through the second optical fiber 620, so that the interference of external light can be avoided, the loss during the propagation of light can be prevented, and the accuracy of adjustment can be improved.
Example 2:
fig. 6 is a schematic diagram of a backlight module according to a second embodiment of the present application, as shown in fig. 6, unlike the first embodiment, in this embodiment, light intensity is detected by a photo resistor 722, and the heating wire 721 is energized by different light intensities, so that the heating wire 721 in the first chamber 310 and the heating wire 721 in the second chamber 320 generate heat, the photosensitive heating structure 700 includes the heating wire 721 and a photo resistor 722, the heating wire 721 and the photo resistor 722 are serially arranged, the heating wire 721 is located in the chamber, and the photo resistor 722 is arranged on the outer surface of the housing 300; the light of the first light bar 110 irradiates the light-sensitive resistor 722 corresponding to the first chamber 310, and the light of the second light bar 120 irradiates the light-sensitive resistor 722 corresponding to the second chamber 320.
Compared with the solution of the first embodiment, in the solution of the present embodiment, the light intensities of the first light bar 110 and the second light bar 120 are detected by the photoresistors 722, and then the heating wire 721 is heated, the heating wire 721 heats the gas in the chamber, so that the gas in the chamber expands, and the sealing member 400 is pushed, thereby realizing the adjustment of the current magnitudes of the first light bar 110 and the second light bar 120, and changing the brightness magnitudes of the first light bar 110 and the second light bar 120.
Exemplary when the light intensity of the first light bar 110 is greater than the light intensity of the second light bar 120, the light of the first light bar 110 irradiates the corresponding photoresistor 722 in the first chamber 310, the resistance of the photoresistor 722 decreases, the current increases, the heat of the heating wire 721 increases, the volume of the inert gas in the first chamber 310 increases, the light of the second light bar 120 irradiates the corresponding photoresistor 722 in the second chamber 320, the resistance of the photoresistor 722 decreases, the current increases, the heat of the heating wire 721 increases, the volume of the inert gas in the second chamber 320 increases, but the volume of the inert gas expansion in the first chamber 310 is greater than the volume of the inert gas expansion in the second chamber 320, the sealing member 400 moves toward the second chamber 320, the brightness of the first light bar 110 decreases, and the brightness of the second light bar 120 increases.
Further, fig. 7 is a schematic view of a photosensitive heating structure in two chambers according to a second embodiment of the present application, as shown in fig. 7, the photosensitive heating structure 700 in the first chamber 310 is disposed in parallel with the photosensitive heating structure 700 in the second chamber 320. To ensure that the voltage of the photosensitive heating structure 700 in the first chamber 310 is the same as that of the photosensitive heating structure 700 in the second chamber 320, the first light bar 110 and the second light bar 120 can be adjusted synchronously and reversely during adjustment, so that the brightness of the first light bar 110 and the second light bar 120 tends to be consistent faster.
It should be noted that, the inventive concept of the present application may form a very large number of embodiments, but the application documents have limited space and cannot be listed one by one, so that on the premise of no conflict, the above-described embodiments or technical features may be arbitrarily combined to form new embodiments, and after the embodiments or technical features are combined, the original technical effects will be enhanced.
The foregoing is a further detailed description of the present application in connection with specific alternative embodiments, and it is not intended that the practice of the present application be limited to such descriptions. It should be understood that those skilled in the art to which the present application pertains may make several simple deductions or substitutions without departing from the spirit of the present application, and all such deductions or substitutions should be considered to be within the scope of the present application.
Claims (10)
1. The backlight module is characterized by comprising a back plate, a light guide plate, a first light bar and a second light bar, wherein the light guide plate is arranged on the bottom plate of the back plate, the first light bar and the second light bar are both arranged on the side plate of the back plate, and the light emitting side of the first light bar and the light emitting side of the second light bar face the same side of the light guide plate;
the backlight module further comprises a current adjusting module, wherein the current adjusting module comprises an input end, a first output end and a second output end; the first output end is connected with the first light bar, and the second output end is connected with the second light bar;
the current adjusting module monitors brightness difference between the first light bar and the second light bar and adjusts the current of the first output end and the current of the second output end so that the brightness of the first light bar and the brightness of the second light bar tend to be consistent.
2. The backlight module according to claim 1, wherein the current adjusting module comprises a housing, a sealing member and a sliding resistance changing structure, the sliding resistance changing structure is connected with the inner wall of the housing, the sealing member is connected with the sliding resistance changing structure in a sliding manner, the housing is divided into two non-communicated chambers, namely a first chamber and a second chamber, and inert gas is filled in each of the first chamber and the second chamber;
the sealing element is a conductor, one end of the sealing element is connected with the input end, and the other end of the sealing element is connected with the first output end and the second output end through the sliding resistance-changing structure; when the sealing element moves towards the direction of the first output end, the resistance of the first output end is reduced, the current is increased, the resistance of the second output end is increased, and the current is reduced; when the sealing element moves towards the direction of the second output end, the resistance of the first output end is increased, the current is reduced, the resistance of the second output end is reduced, and the current is increased;
a photosensitive heating structure is arranged in the first cavity and the second cavity, light on the first lamp strip irradiates the photosensitive heating structure in the first cavity, the photosensitive heating structure heats up, and the inert gas in the first cavity is heated; the light on the second lamp strip irradiates the photosensitive heating structure in the second cavity, the photosensitive heating structure heats up, and the inert gas in the second cavity is heated; to control the reciprocating movement of the seal between the first output and the second output.
3. The backlight module according to claim 2, wherein the photosensitive heating structure comprises a metal rod, a plurality of light channels are arranged on one side of the shell facing the light guide plate, light rays on the first light bar irradiate onto the metal rod in the first cavity through the corresponding light channels, and the metal rod is heated to expand inert gas in the first cavity; and the light rays on the second light bar irradiate onto the metal rod in the second cavity through the corresponding light channel, and the metal rod is heated to expand the inert gas in the second cavity.
4. A backlight module according to claim 3, wherein the cross-sectional area of the light channel is gradually reduced along the first direction by taking the direction of the first light bar towards the light guide plate as the first direction.
5. A backlight module according to claim 4, wherein the current adjusting module further comprises a convex lens disposed within the light channel such that light passing through the light channel is concentrated on the metal rod.
6. A backlight module according to claim 3, wherein the inner wall of the light channel is provided with a phosphor layer.
7. The backlight module according to claim 2, wherein the light-sensitive heating structure comprises a metal rod, the current adjusting module further comprises a first optical fiber and a second optical fiber, one end of the first optical fiber faces the light emitting surface of one lamp bead on the first lamp strip, and the other end faces the metal rod in the first chamber; one end of the second optical fiber faces the light emitting surface of one lamp bead on the second lamp strip, and the other end of the second optical fiber faces the metal rod in the second cavity.
8. The backlight module according to claim 2, wherein the photosensitive heating structure comprises a heating wire and a photoresistor, the heating wire and the photoresistor are arranged in series, the heating wire is positioned in the cavity, and the photoresistor is arranged on the outer surface of the shell;
the light of the first light bar irradiates onto the photoresistors corresponding to the first chamber, and the light of the second light bar irradiates onto the photoresistors corresponding to the second chamber.
9. A backlight module according to claim 8, wherein the light-sensitive heating structure in the first chamber is arranged in parallel with the light-sensitive heating structure in the second chamber.
10. A display device comprising a display panel and a backlight module according to any one of claims 1-9, the backlight module providing backlight for the display panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410133491.0A CN117789663A (en) | 2024-01-30 | 2024-01-30 | Backlight module and display device |
Applications Claiming Priority (1)
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