CN111679500A - Side-in backlight module for improving display brightness and liquid crystal display equipment - Google Patents
Side-in backlight module for improving display brightness and liquid crystal display equipment Download PDFInfo
- Publication number
- CN111679500A CN111679500A CN202010576515.1A CN202010576515A CN111679500A CN 111679500 A CN111679500 A CN 111679500A CN 202010576515 A CN202010576515 A CN 202010576515A CN 111679500 A CN111679500 A CN 111679500A
- Authority
- CN
- China
- Prior art keywords
- liquid crystal
- light valve
- backlight module
- composite film
- crystal light
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 103
- 239000002131 composite material Substances 0.000 claims abstract description 55
- 238000009792 diffusion process Methods 0.000 claims abstract description 55
- 238000002834 transmittance Methods 0.000 claims abstract description 10
- 239000000758 substrate Substances 0.000 claims description 16
- 230000001276 controlling effect Effects 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 239000010408 film Substances 0.000 description 60
- 238000005192 partition Methods 0.000 description 20
- 230000000694 effects Effects 0.000 description 12
- 230000000875 corresponding effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
- 239000003292 glue Substances 0.000 description 3
- 230000010287 polarization Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000005282 brightening Methods 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 239000004417 polycarbonate Substances 0.000 description 2
- 241001270131 Agaricus moelleri Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 125000001475 halogen functional group Chemical group 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000004148 unit process Methods 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
Abstract
The invention discloses a side-in type backlight module for improving display brightness and a liquid crystal display device, wherein the side-in type backlight module comprises: a backlight including a light emitting unit and a light guide plate; the diffusion composite film comprises a bottom film layer and a refraction convex cone arranged in an array mode on the bottom film layer, and at least part of light passing through the diffusion composite film forms polarized light under the refraction of the refraction convex cone. According to the scheme of the invention, the thickness of the diffusion composite film is greatly reduced, the transmittance of light in the diffusion composite film can be effectively improved, and the liquid crystal display device achieves higher display brightness and display precision.
Description
Technical Field
The invention relates to the technical field of optical control, in particular to a side-in type backlight module for improving display brightness and a liquid crystal display device.
Background
In a liquid crystal display device, there are two types of commonly used backlight modules: direct type backlight module and side type backlight module. Compared with the direct type backlight module, the lateral type backlight module can reduce the use of LED crystal grains and has thinner thickness. Therefore, the side-in type backlight module is widely applied to ultrathin and portable liquid crystal display devices, such as liquid crystal televisions, liquid crystal computers and the like.
The side-in type backlight module comprises a backlight source, a lower polarizer, a liquid crystal light valve and an upper polarizer which are sequentially arranged, wherein the lower polarizer converts light beams generated by the backlight source into polarized light, and the upper polarizer is used for analyzing the polarized light modulated by the liquid crystal light valve to generate light-dark contrast so as to generate a display picture. However, the thickness of the current lower polarizer needs to be set to be approximately 0.1 μm, and the thickness is relatively thick, which affects the transmittance of light, and thus the display brightness and display accuracy of the liquid crystal display device.
Disclosure of Invention
The invention discloses a side-in type backlight module for improving display brightness and liquid crystal display equipment, which are used for solving the problem that the display brightness and the display precision of the liquid crystal display equipment are poor in the prior art.
In order to solve the problems, the invention adopts the following technical scheme:
a side-in backlight module is provided, which comprises:
a backlight including a light emitting unit and a light guide plate;
the diffusion composite film comprises a bottom film layer and a refraction convex cone arranged in an array mode on the bottom film layer, and at least part of light passing through the diffusion composite film forms polarized light under the refraction of the refraction convex cone.
Optionally, the tip of the refraction convex cone is far away from the bottom film layer, and the refraction convex cone is conical.
Optionally, the height of each refraction convex cone is 0.03-0.05 μm, the inclination is 55-65 °, and the distance between two adjacent refraction convex cones is 0.08-0.12 μm.
Optionally, the diffusion composite film further includes a top film layer covering the top of the refraction convex cone, and the bottom film layer, the refraction convex cone and the top film layer are integrally formed.
Optionally, the top film layer is provided with a plurality of dots which are sequentially arranged and used for brightening, and the dots and the refraction convex cones are respectively located on two sides of the top film layer.
Optionally, the lateral backlight module further includes a liquid crystal light valve, wherein the light guide plate, the diffusion composite film, and the liquid crystal light valve are stacked in sequence, and the liquid crystal light valve is used for modulating the light intensity of the polarized light, or
The light guide plate, the liquid crystal light valve and the diffusion composite film are sequentially superposed, and the liquid crystal light valve is used for regulating and controlling the light intensity of the light emitted from the light guide plate.
Optionally, the liquid crystal light valve includes a first substrate, a liquid crystal layer, and a second substrate, which are stacked, where the first substrate includes row transparent electrodes arranged in an array, and the second substrate includes column transparent electrodes arranged in an array; the row transparent electrodes and the column transparent electrodes are connected with the driving unit through leads.
The liquid crystal display device comprises a liquid crystal display panel and any one of the lateral type backlight module; the diffusion composite film is positioned between the light guide plate and the liquid crystal light valve, and a first polarizer is bonded between the display panel and the liquid crystal light valve; or
The diffusion composite film is positioned between the liquid crystal light valve and the light guide plate, a first polaroid is bonded between the diffusion composite film and the liquid crystal light valve, and a second polaroid is bonded between the diffusion composite film and the display panel.
Optionally, the liquid crystal display device further includes a driving chip electrically connected to the side-in backlight module and the display panel, and the driving chip is configured to: and controlling data updating of the liquid crystal light valve and the display panel, decomposing the acquired image signal into gray background image information and low dynamic display image information, outputting the gray background image information to the liquid crystal light valve for transmittance setting, and outputting the low dynamic display image information to the display panel for displaying.
Optionally, the liquid crystal light valve has a gray scale adjustment range of 10 levels or more.
The technical scheme adopted by the invention can achieve the following beneficial effects:
the refraction convex cone is arranged on the diffusion composite film, so that the thickness of the diffusion composite film can be reduced to 0.04 mu m, and the thickness of the diffusion composite film is greatly reduced. Therefore, the transmittance of light in the diffusion composite film can be effectively improved, and the liquid crystal display device can achieve higher display brightness and display precision. The driving mode of the liquid crystal light valve is easy to realize, the cost is lower, the power consumption is very low, and the liquid crystal light valve has better application prospect; the method has the advantages that no obvious partition boundary exists, the transmittance has no obvious difference, namely, no obvious partition gap exists, so that the Moire problem caused by the mutual superposition of the pixel graph and the partition graph is avoided, the product defect is reduced, and the display effect without image smear is realized. The backlight module can also be used for realizing more accurate partition corresponding effect and controlling the illumination area more accurately, thereby realizing accurate light control.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below to form a part of the present invention, and the exemplary embodiments and the description thereof illustrate the present invention and do not constitute a limitation of the present invention. In the drawings:
fig. 1 is a schematic structural diagram of a first lateral backlight module according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a liquid crystal light valve according to an embodiment of the disclosure;
FIG. 3 is a schematic diagram of the brightness control effect and signal driving manner of each divisional control of a liquid crystal light valve according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a second lateral backlight module according to an embodiment of the disclosure;
fig. 5 is a schematic diagram of an operating process of a liquid crystal display device according to an embodiment of the present invention.
Wherein the following reference numerals are specifically included in figures 1-5:
a side-in type backlight module-100; a display panel-200; a first polarizer-201; a backlight source-1; a diffusion composite membrane-2; a liquid crystal light valve-3; a light-emitting unit-11; a light guide plate-12; a bottom film layer-21; a refraction convex cone-22; a top film layer-23; dot-24; a liquid crystal layer-31; a row transparent electrode-32; a column transparent electrode-33; a drive unit-34; a lead-35; a first substrate-36.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The lateral backlight module 100 of the present invention is used to improve the display brightness, and is particularly suitable for a liquid crystal display device with HDR (High-Dynamic Range). As shown in fig. 1, the side-in backlight module 100 includes a backlight 1 and a diffusion composite film 2. The backlight 1 includes a light emitting unit 11 and a light guide plate 12, the light emitting unit 11 is a point light source, and may be specifically an LED lamp, and the light guide plate 12 converts the point light source emitted by the light emitting unit 11 into a surface light source. The diffusion composite film 2 comprises a bottom film layer 21 and a plurality of refraction convex cones 22, the plurality of refraction convex cones 22 are arrayed on the bottom film layer 21, the refraction convex cones 22 are supported by the bottom film layer 21, at least part of light passing through the diffusion composite film 2 forms polarized light under the refraction of the refraction convex cones 22, and therefore the first polarizer 201 of the liquid crystal display device receives and controls the polarized light, and the display panel 200 of the liquid crystal display device displays pictures.
In the side-in backlight module 100, the refraction convex cone 22 is arranged on the diffusion composite film 2, so that the thickness of the diffusion composite film 2 can be reduced to 0.04 μm, and the thickness of the diffusion composite film 2 is greatly reduced. Therefore, the transmittance of light in the diffusion composite film 2 can be effectively improved, and the liquid crystal display device can achieve higher display brightness and display precision.
The diffusion composite membrane 2 may be arranged in various ways. In one example, the top film layer 23 is also covered on the top of the refractive convex cones 22. Each of the refractive convex cones 22 has a conical shape with a cone tip facing the top film layer 23. The height of the refraction convex cones 22 is 0.03-0.05 μm, preferably 0.04 μm, the inclination is 55-65 °, preferably 60 °, and the distance between two adjacent refraction convex cones 22 is 0.08-0.12 μm, preferably 0.01 μm. The material of the bottom film layer 21, the refractive convex cones 22 and the top film layer 23 is preferably resin, and more preferably PC (Polycarbonate). The bottom film layer 21, the refraction convex cones 22 and the top film layer 23 are integrally injection molded.
Through the arrangement of the mode, the diffusion composite membrane 2 is convenient to process and form and low in cost; the possibility that the refractive index of the refraction convex cone 22 is influenced by dust falling or adhesive sticking on the refraction convex cone 22 is reduced, so that the polarization directions of polarized light formed by the refraction convex cone 22 are basically the same, and the influence of scattered light on the display effect is reduced; on the premise of effectively reducing the thickness of the diffusion composite film 2, polarized light with a required angle is formed.
In addition, a plurality of dots 24 may be sequentially arranged on the top surface of the top film layer 23, wherein the top surface of the top film layer 23 is opposite to the bottom surface, and the bottom surface faces the refraction convex cone 22. With such an arrangement, the diffusion composite film 2 can achieve a brightening effect; and the mesh points 24 do not need to be arranged on the light guide plate 12, so that the risk of scrapping the light guide plate 12 is reduced.
In addition, as shown in fig. 2, the edge-type backlight module 100 further includes a liquid crystal light valve 3, and the liquid crystal light valve 3 includes a liquid crystal layer 31, a plurality of row transparent electrodes 32, a plurality of column transparent electrodes 33, a driving unit 34, a lead 35, a first substrate 36, and a second substrate. The first substrate 36 and the plurality of row transparent electrodes 32 are disposed on the top of the liquid crystal layer 31, the second substrate and the plurality of column transparent electrodes 33 are disposed on the bottom of the liquid crystal layer 31 and are substantially perpendicular to the row transparent electrodes 32, a small space is provided between the column transparent electrodes 33 and the row transparent electrodes 32, and the liquid crystal layer 31 is filled in the space. The driving unit 34 may be specifically a driving signal controller or a connector, is located outside the display area, and is electrically connected to each row transparent electrode 32 and each column transparent electrode 33 through different peripheral leads 35 (e.g., gold balls or gold wires, etc.), so as to be able to individually control each row transparent electrode 32 and each column transparent electrode 33, and implement individual backlight brightness control at the overlapping position of the row transparent electrode 32 and the column transparent electrode 33. After the liquid crystal light valve 3 is arranged, pixel switches required by a TFT panel are not arranged on a display area, compared with a TFT thin film transistor driving mode, the shielding of the pixel switches on light rays can be avoided, the aperture opening ratio is improved, meanwhile, the power consumption and the cost of the driving unit 34 can be greatly reduced, and the service time of the display device is prolonged.
As shown in fig. 3, the liquid crystal light valve 3 is driven by signals in such a way that the gray scale control (i.e. light intensity control) is performed on the spatial matrix position by applying different voltages to the row transparent electrode 32 and the column transparent electrode 33, so as to achieve different backlight transmittance effects. The liquid crystal light valve 3 adopts a simple matrix circuit driving and a dynamic driving mode, that is, the row transparent electrodes 32 are opened only in a part of time according to the difference of the display row resolution, the time sequence distribution of each row transparent electrode 33 is obtained through data calculation, and the information of the pixel position is updated. However, since there is no pixel switch to keep the driving voltage of the pixel position, so that the luminance of the pixel has a certain fluctuation, in order to avoid the image sticking phenomenon that may be caused by the asynchronous data update of the liquid crystal light valve 3 and the data of the display panel 200, the driving timing of the liquid crystal light valve 3 should be matched with the signal update of the display panel 200, that is, the partition data update of the liquid crystal light valve 3 adopts the line-by-line scanning mode, and the scanning speed is matched with the scanning speed of the display panel 200, for example, a single partition of the liquid crystal light valve 3 corresponds to 20 screen pixels, when the partition scanning is performed, the display panel 200 only completes the update of 20 pixels at the corresponding position. When the next partition is lit, the last 20 pixels are updated.
The setting position of the liquid crystal light valve 3 can be adjusted according to the actual effect to achieve the best backlight uniformity and HDR display effect. In one example, as shown in fig. 1, the light guide plate 12, the diffusion composite film 2, the liquid crystal light valve 3, and the first polarizer 201 are sequentially bonded and stacked together, and the polarized light formed by the diffusion composite film 2 enters the first polarizer 201 through the liquid crystal light valve 3 by zone control local gray scale modulation, and then further reaches the display panel 200, and further loads a display image, and outputs a high dynamic light rendering effect. Thus, the liquid crystal light valve 3 and the display panel 200 may share one first polarizer 201, i.e., one first polarizer 201 is disposed between the liquid crystal light valve 3 and the display panel 200. Thus, the polarization direction of the display panel 200 is the same as the polarization direction after passing through the first polarizer 201, the brightness loss is not obvious, and only the conventional light intensity loss of the upper glass substrate of the liquid crystal light valve 3 and the first polarizer 201 is within 5%, that is, when the HDR high dynamic display effect is realized, the high screen brightness can still be maintained.
Moreover, the liquid crystal light valve 3, the first polarizer 201, and the display panel 200 may be bonded together by oca (optical clear adhesive) optical cement or other glue, and the sum of the thicknesses of the liquid crystal light valve 3, the glue layer, and the substrate of the display panel 200 is usually less than 0.5mm, that is, the distance between the partition control unit and the display pixel is very short, so that the light emitted by the partition control unit is transmitted to the display panel 200 without being scattered, so as to illuminate the corresponding display area. Compared with the HDR effect of the general direct-type backlight module 100, the stacked structure in this example can achieve accurate correspondence between the partition range and the pixels, that is, when a certain partition is lit, the light at the corresponding position is not substantially incident into surrounding partitions, and a halo effect that may occur to a high-brightness object is reduced, so that the problem of mutual aliasing of light among different partitions can be effectively solved, and the picture quality during HDR display is improved. In the direct-type backlight module 100, a larger distance is usually disposed between the light emitting unit 11 and the display panel 200, for example, more than 2mm, and the light mixing distance may cause the light emitted by the light emitting unit 11 to be deflected by a larger lateral distance, so that the light emitted by a certain partition will have a certain influence on surrounding partitions, thereby reducing the display effect of HDR.
In another example, as shown in fig. 4, the light guide plate 12, the liquid crystal light valve 3, the diffusion composite film 2, and the first polarizer 201 (not shown in fig. 4) are sequentially stacked, and light emitted from the light guide plate 12 is gray-modulated by the liquid crystal light valve 3, enters the diffusion composite film 2, is polarized by the diffusion composite film 2, and then passes through the first polarizer 201. At this time, a second polarizer (not shown) is disposed between the diffusion composite film 2 and the display panel 200, and the second polarizer is bonded to the diffusion composite film 2 and the display panel 200 by OCA optical cement or other glues. In the stacked structure in this example, the diffusion composite film 2 can be placed more smoothly by the liquid crystal light valve 3 and the substrate (specifically, a glass substrate) of the display panel 200, so that the wrinkles of the diffusion composite film 2 can be reduced, and the yield of products can be improved.
The lcd apparatus of the present invention includes a side-in type backlight module 100 and a display panel 200 connected to the side-in type backlight module 100, wherein the side-in type backlight module 100 is the above-mentioned side-in type backlight module 100. In the liquid crystal display device, by providing the refraction convex cones 22 on the diffusion composite film 2, the thickness of the diffusion composite film 2 can be reduced even to 0.04 μm, greatly reducing the thickness of the diffusion composite film 2. Therefore, the transmittance of light in the diffusion composite film 2 can be effectively improved, and the liquid crystal display device can achieve higher display brightness and display precision.
The diffusion composite film 2 may be disposed between the light guide plate 12 and the liquid crystal light valve 3, and at this time, the display panel 200 and the liquid crystal light valve 3 share a first polarizer 201, one surface of the first polarizer 201 is bonded to the display panel 200, and the other surface is bonded to the liquid crystal light valve 3. The display panel 200 is further provided with a polarizer on the side far away from the liquid crystal light valve 3.
The diffusion composite film 2 may also be disposed between the liquid crystal light valve 3 and the display panel 200, and at this time, a first polarizer is disposed between the diffusion composite film 2 and the display panel 200, and a second polarizer (not shown in the figure) is disposed between the diffusion composite film 2 and the display panel 200. The display panel 200 is further provided with a polarizer on the side far away from the liquid crystal light valve 3.
The specific operation process of the liquid crystal display device is shown in fig. 5 as follows: the driving chip reads the high dynamic image display data from the memory and transmits the high dynamic image display data to the image decomposition and control unit of the driving chip, the image decomposition and control unit processes the high dynamic image display data to generate backlight partition control data and display image content, and then the driving chip transmits the backlight partition control data to the driving unit 34 of the liquid crystal light valve 3 in each frame of picture and transmits the display image content to the driving unit of the display panel 200. In order to ensure the consistency of data update of the liquid crystal light valve 3 and the display panel 200, the two should use the same data scanning mode, such as progressive scanning, and simultaneously ensure the data scanning speed matching, because the partition width usually includes several or tens of pixel widths, when data update is performed on a partition on the liquid crystal light valve 3, it should wait for all pixels on the corresponding position on the display panel 200 to complete data update.
In the liquid crystal display device using the lateral backlight module 100 of the present invention, the liquid crystal light valve 3 for gray scale control and the display panel 200 for displaying images are controlled by the driving chip in a unified manner, and the driving chip decomposes the obtained HDR image signal into gray scale background image information and low dynamic display image information, outputs the gray scale background image information to the liquid crystal light valve 3, sets the transmittance, and outputs the low dynamic display image information to the display panel 200 for display.
The liquid crystal light valve 3 used may have a gradation adjustment range of 10 steps or more, and usually has a gradation distribution range of several tens of steps. Since the backlight intensity needs to be transmitted through the liquid crystal light valve 3 and the display panel 200 to output the final image, the contrast of the obtained image is obtained by multiplying the gray scales of the liquid crystal light valve 3 and the display panel 200. For example, if the contrast ratio of the liquid crystal light valve 3 is 10:1 and the contrast ratio of the display panel 200 is 500:1, the finally obtained display image has a contrast ratio of 10 × 500:1 to 5000: 1. The resulting display image contrast of the present invention is thus improved by a factor of 10 over non-HDR images.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A side-in backlight module, comprising:
a backlight including a light emitting unit and a light guide plate;
the diffusion composite film comprises a bottom film layer and a refraction convex cone arranged in an array mode on the bottom film layer, and at least part of light passing through the diffusion composite film forms polarized light under the refraction of the refraction convex cone.
2. The edge-type backlight module of claim 1, wherein the refractive convex cones have cone tips away from the bottom film layer, and the refractive convex cones have cone shapes.
3. The edge-type backlight module of claim 2, wherein the height of each of the refractive convex cones is 0.03-0.05 μm, the slope is 55-65 °, and the distance between two adjacent refractive convex cones is 0.08-0.12 μm.
4. The edge-type backlight module of claim 1, wherein the diffusion composite film further comprises a top film layer covering the top of the refraction convex cones, and the bottom film layer, the refraction convex cones and the top film layer are integrally formed.
5. The edge-type backlight module of claim 4, wherein the top film layer has a plurality of dots arranged in sequence for brightness enhancement, and the dots and the refractive convex cones are respectively disposed on two sides of the top film layer.
6. The edge-type backlight module of any one of claims 1 to 5, further comprising a liquid crystal light valve, wherein the light guide plate, the diffusion composite film, and the liquid crystal light valve are stacked in sequence, and the liquid crystal light valve is used for modulating the intensity of the polarized light, or
The light guide plate, the liquid crystal light valve and the diffusion composite film are sequentially superposed, and the liquid crystal light valve is used for regulating and controlling the light intensity of the light emitted from the light guide plate.
7. The edge-type backlight module of claim 6, wherein the liquid crystal light valve comprises a first substrate, a liquid crystal layer, and a second substrate stacked together, the first substrate comprises row transparent electrodes arranged in an array, and the second substrate comprises column transparent electrodes arranged in an array; the row transparent electrodes and the column transparent electrodes are connected with the driving unit through leads.
8. A liquid crystal display device, comprising a display panel and the side-in backlight module of any one of claims 1-7; the diffusion composite film is positioned between the light guide plate and the liquid crystal light valve, and a first polarizer is bonded between the display panel and the liquid crystal light valve; or
The diffusion composite film is positioned between the liquid crystal light valve and the light guide plate, a first polaroid is bonded between the diffusion composite film and the liquid crystal light valve, and a second polaroid is bonded between the diffusion composite film and the display panel.
9. The liquid crystal display device of claim 8, further comprising a driving chip electrically connected to the side-entry backlight module and the display panel, the driving chip configured to: and controlling data updating of the liquid crystal light valve and the display panel, decomposing the acquired image signal into gray background image information and low dynamic display image information, outputting the gray background image information to the liquid crystal light valve for transmittance setting, and outputting the low dynamic display image information to the display panel for displaying.
10. The liquid crystal display device according to claim 8, wherein the liquid crystal light valve has a gradation adjustment range of 10 steps or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010576515.1A CN111679500A (en) | 2020-06-22 | 2020-06-22 | Side-in backlight module for improving display brightness and liquid crystal display equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010576515.1A CN111679500A (en) | 2020-06-22 | 2020-06-22 | Side-in backlight module for improving display brightness and liquid crystal display equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111679500A true CN111679500A (en) | 2020-09-18 |
Family
ID=72456162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010576515.1A Pending CN111679500A (en) | 2020-06-22 | 2020-06-22 | Side-in backlight module for improving display brightness and liquid crystal display equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111679500A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113075813A (en) * | 2020-11-16 | 2021-07-06 | 友达光电股份有限公司 | Display device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050237475A1 (en) * | 2002-09-30 | 2005-10-27 | Chou Stephen Y | Tunable subwavelength resonant grating filter |
| CN101095077A (en) * | 2004-12-30 | 2007-12-26 | 3M创新有限公司 | Optical film having a structured surface with concave pyramid-shaped structures |
| CN104238182A (en) * | 2014-09-30 | 2014-12-24 | 深圳市华星光电技术有限公司 | Liquid crystal display device |
| CN109188591A (en) * | 2018-09-30 | 2019-01-11 | 惠科股份有限公司 | Polaroid and display device |
| CN209070274U (en) * | 2018-11-26 | 2019-07-05 | 深圳市隆利科技股份有限公司 | A kind of HDR display device based on side entrance back structure |
-
2020
- 2020-06-22 CN CN202010576515.1A patent/CN111679500A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050237475A1 (en) * | 2002-09-30 | 2005-10-27 | Chou Stephen Y | Tunable subwavelength resonant grating filter |
| CN101095077A (en) * | 2004-12-30 | 2007-12-26 | 3M创新有限公司 | Optical film having a structured surface with concave pyramid-shaped structures |
| CN104238182A (en) * | 2014-09-30 | 2014-12-24 | 深圳市华星光电技术有限公司 | Liquid crystal display device |
| CN109188591A (en) * | 2018-09-30 | 2019-01-11 | 惠科股份有限公司 | Polaroid and display device |
| CN209070274U (en) * | 2018-11-26 | 2019-07-05 | 深圳市隆利科技股份有限公司 | A kind of HDR display device based on side entrance back structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113075813A (en) * | 2020-11-16 | 2021-07-06 | 友达光电股份有限公司 | Display device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10600373B2 (en) | Display device and method of driving the same | |
| KR100964467B1 (en) | Display apparatus | |
| KR100964466B1 (en) | Display apparatus | |
| US7537357B2 (en) | Backlight unit for dynamic image and display employing the same | |
| US11215863B2 (en) | Light modulating element, backlight module, display device and method for driving the same | |
| CN209070274U (en) | A kind of HDR display device based on side entrance back structure | |
| CN110750009A (en) | Display device | |
| JP2006339148A (en) | Backlight unit and liquid crystal display device | |
| CN101295104A (en) | LCD device, driving device and method | |
| US20030058399A1 (en) | Field sequential liquid crystal display apparatus using active matrix liquid crystal display device | |
| US6992650B2 (en) | Liquid crystal display apparatus using homogeneously aligned liquid crystal and drive method therefor | |
| KR101201143B1 (en) | liquid crystal display device and method for driving the same | |
| CN101399010A (en) | Driving method, driving circuit, electro-optical device, and electronic apparatus | |
| JP2018081145A (en) | Display and lighting device | |
| KR20160056386A (en) | Display apparatus | |
| CN111679500A (en) | Side-in backlight module for improving display brightness and liquid crystal display equipment | |
| CN110956934B (en) | Display and display brightness adjusting method thereof | |
| CN109212832B (en) | Liquid crystal display panel, manufacturing method thereof and liquid crystal display device | |
| US20100165252A1 (en) | Backlight of liquid crystal display device | |
| CN111170651A (en) | Quantum dot glass aging equipment | |
| KR101560400B1 (en) | Edge type backlight unit and liquid crystal display device having the same | |
| KR100696655B1 (en) | A liquid crystal display for improving brightness thereof | |
| CN115128866A (en) | Regional backlight structure and display panel | |
| CN114545692A (en) | Stacked screen liquid crystal display device | |
| CN113053323A (en) | Display device and color coordinate adjusting method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200918 |
|
| RJ01 | Rejection of invention patent application after publication |