CN112198714B - Low halo high contrast zone driven thin display - Google Patents
Low halo high contrast zone driven thin display Download PDFInfo
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- CN112198714B CN112198714B CN202011134669.1A CN202011134669A CN112198714B CN 112198714 B CN112198714 B CN 112198714B CN 202011134669 A CN202011134669 A CN 202011134669A CN 112198714 B CN112198714 B CN 112198714B
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- 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
- G02F1/133602—Direct backlight
- G02F1/133603—Direct backlight with LEDs
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- 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
- G02F1/133602—Direct backlight
- G02F1/133605—Direct backlight including specially adapted reflectors
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
- G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
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Abstract
The invention discloses a partition driving thin display with low halation and high contrast, which comprises a back plate in a concave shell structure, a light source plate, a diffusion plate, an optical diaphragm and a liquid crystal panel, wherein the light source plate, the diffusion plate and the optical diaphragm are sequentially arranged in the concave structure of the back plate; the light source board comprises a PCB board, the upper end surface of the PCB board is provided with a plurality of support columns at intervals, and the upper end surfaces of the support columns are abutted against the lower end surface of the diffusion board; the LED light sources are arranged on the PCB in a rectangular array; a primary optical lens is arranged on the light emitting surface of the LED light source, and the LED light source is provided with a reflecting cup formed by plastic with the reflectivity of more than 80% or plastic with the penetration rate of 30-60%; the LED light sources are divided into a plurality of LED areas, at least one LED light source is arranged in each LED area, the LED light sources in the same LED area can be mutually connected in series, and a plurality of IC circuits drive the board-to-board electric connection mechanism. The invention has the characteristics of low halo, thinness, high contrast and high color gamut.
Description
Technical Field
The invention relates to the technical field of displays, in particular to a partition driving thin display with low halation and high contrast.
Background
The LED light source used in the general direct-type driving display is mainly LED (light Emitting diode) components composed of a flat cup package plcc (plastic LED Chip carrier) bracket with a secondary optical lens, and the LEDs are distributed on the lamp panel at a fixed interval, so as to form a uniform surface light source by penetrating through the light mixing distance and the diffusion plate, the optical film, the liquid crystal panel, and the like, and then the partition driving circuit is matched to switch the partitioned LED light sources according to the bright and dark areas corresponding to the picture, thereby achieving the display with high brightness contrast display.
However, in the existing thin direct type multi-region driven display, because the conventional PLCC bracket LED light source is not provided with a secondary lens, the limitation of a small light emitting angle of a reflecting cup light type (about 120 degrees) is easily caused, and the design of increasing the number of particles or adjusting an optical membrane is needed to achieve a uniform surface light source, which consumes higher cost; though the atomized optical film can improve the taste of the noodle, it has the disadvantages of large light loss and low optical efficiency. Therefore, to achieve a uniform surface light source with a low cost and a light source board with a small number of LEDs, a multi-surface light emitting csp (chip Scale package) (100-178 degree light emitting angle) is usually selected, and such LED light sources have a large light emitting angle and partial side light, so that it is easier to achieve a better display surface quality in a cavity design with a small light mixing Distance (Optical Distance) in light mixing. However, such LED light sources with more side lights are prone to have more wide-angle side lights, so that when the LED light sources are driven in a subarea manner, it is inevitable that the wide-angle side lights emitted by the LED light sources enter a display area beyond a single subarea, which causes visual halo loss, thereby reducing the contrast and sharpness of the display. In the display frame, the ffc (flexible Flat cable) Flat cable used in the electrical connector of the general backlight module in the market is easy to be connected by length or bending, which results in large requirement of mechanism space and thicker backlight module.
Disclosure of Invention
The invention aims to provide a low-halo high-contrast partition-driven thin display with low halo, high contrast and high color gamut.
The technical scheme adopted by the invention is as follows:
the partition driving thin display with low halation and high contrast comprises a back plate with a concave shell structure, a light source plate, a diffusion plate, an optical diaphragm and a liquid crystal panel, wherein the light source plate, the diffusion plate and the optical diaphragm are sequentially arranged in the concave structure of the back plate; the light source board comprises a PCB board and a plurality of LED light sources which are arranged on the PCB board in a rectangular array; a plurality of support columns for maintaining the light mixing distance are arranged on the upper end face of the PCB at intervals; the LED light sources are divided into a plurality of LED areas, at least one LED light source is arranged in each LED area, and the LED light sources in the same LED area are mutually electrically connected and driven by the same IC circuit; the LED light sources are of a reflecting cup structure, the reflecting cup is made of materials with the reflectivity of more than 80% or plastic with the penetration rate of 30-60%, and therefore light emitted by the LED chip after being packaged is reduced to form large-angle side light; the lamp panel composed of a plurality of LED light sources is electrically connected and driven to the outside by the board-to-board electric connection mechanism.
In a possible embodiment, the distance between the lower end surface of the diffusion plate and the light source plate is less than or equal to 7 mm.
As a possible embodiment, the reflective material of the reflective cup of several LED light sources is PCT ((Poly 1, 4-cyclohexanedimethylene terephthalate (Poly1, 4-cyclohexanedimethylene terephthalate)).
As one possible implementation mode, the LED light source contains powder with a convergent light-emitting angle, and the powder is SiO 2 -TiO 2 A binary material.
As a possible implementation mode, a primary optical transmission is arranged on the light emitting surface of the LED light source, and the divergence angle of the light rays of the LED light source output by the lens is 130-160 degrees.
As a possible embodiment, the supporting column is a cubic structure or a frustum-shaped structure with the small end of the supporting column located above.
As a possible implementation manner, the LED light source is a blue light source, and the optical film comprises a quantum dot film, a prism sheet, a reflective brightness enhancement film or a composite film, which can be sequentially disposed above the diffusion plate.
As a possible implementation manner, the LED light source is a blue light source, and the optical film comprises a quantum dot film, a diffusion film, a prism sheet, a reflective brightness enhancement film or a composite film, which can be sequentially disposed above the diffusion plate.
In one possible embodiment, the LED light source is a white light source, and the optical film comprises a diffusion film, a prism sheet, a reflective brightness enhancement film or a composite film, which are sequentially disposed above the diffusion plate.
As a possible embodiment, the diffusion plate has a transmittance of 30% to 55%, and the diffusion plate has a coarse-structured surface disposed toward the panel.
As a possible implementation, it further includes a plurality of electronic components including ICs and peripheral circuits; the electronic assembly is arranged on the back face of the lamp panel, or the electronic assembly is arranged on the independent circuit board and is in butt joint with the lamp panel through the board-to-board terminal assembly.
By adopting the technical scheme, compared with the prior art, the invention has the beneficial effects that: with the improvement of the resolution of the display, the contrast and the color gamut on the image quality expression become main key parameters, but the proposal of the invention is mainly used for a direct type backlight module with OD (optical distance) less than or equal to 7mm, the display field of HDR (High Dynamic display contrast) with High contrast, gray scale color gamut, brightness and color expression is achieved by matching local dimming partition driving with QD (quantum dot) quantum dot technology, preferably, an LED light source formed by white plastic with the reflectivity of more than 80 percent or a transparent plastic reflecting cup support with partial penetration rate can be used, an LED support formed by the white plastic of High reflection PLCC (plastic LED Chip carrier) has a bevel edge, the Chip angle side light can be emitted to the upper part of the reflecting cup, the package has fewer side lights and large angle light emission of the LED light source is reduced, because the special match of the white plastic support packaging form is driven by a light field local partition, the LED light source with the primary lens has the advantages that the primary lens can expand the required angle according to the requirements of light mixing distance and partition size, and the LED light source with the primary lens simultaneously has the effects of easily achieving uniform surface taste and improving light efficiency.
Drawings
The invention is described in further detail below with reference to the drawings and the detailed description;
FIG. 1 is a schematic view in schematic partial cutaway of an aspect of the present invention;
FIG. 2 is a schematic structural diagram of a light source board according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a plurality of LED light sources of the light source board arranged on a PCB board according to the solution of the present invention, wherein the supporting column is not shown;
FIG. 4 is a schematic diagram of a schematic connection structure of an LED light source according to an embodiment of the present invention;
FIG. 5 is a long side angle view of an LED;
FIG. 6 is a diagram of the short side angle of the LED;
FIG. 7 is a comparison graph of side light and halo phenomenon repeatedly verified by CCD;
FIG. 8 is a schematic diagram of the area of the lit area;
FIG. 9 is a comparison diagram of the actual lighting area of the LED;
FIG. 10 is a schematic diagram of the brightness distribution of the display area of different LED support materials photographed by a CCD;
FIG. 11 is a comparison of halo effects in display regions with thicker diffuser structures facing up and down;
fig. 12 is a comparison graph of the luminance distribution of the display region in different directions of the diffuser 3 set under CCD imaging;
FIG. 13 is a schematic view of the FFC flat cable in a relatively straightforward manner connecting the LB and the driver board;
fig. 14 is a design diagram of a board-to-board connector that can be disposed right behind a backplane and directly mate a driver board with an LB rear male-female connector.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.
As shown in one of fig. 1 to 14, the present invention discloses a low halo and high contrast thin display with zone-drive, which comprises a back plate with a concave housing structure, a light source plate 2, a diffusion plate 3, an optical film sequentially disposed in the concave structure of the back plate, and a liquid crystal panel covering the back plate; the light source board 2 includes:
the upper end face of the PCB 21 is provided with a plurality of support columns 23 at intervals, and the upper end faces of the support columns 23 are abutted against the lower end face of the diffusion plate 3;
a plurality of LED light sources 22 arranged on the PCB 21 in a rectangular array;
the LED light sources 22 arranged on the PCB 21 in a rectangular array are divided into a plurality of LED areas, at least one LED light source 22 is arranged in each LED area, wherein the LED light sources 22 in the same LED area are connected in series, and are driven by a plurality of IC circuits and the board-to-board electric connection mechanism.
The LED light sources 22 have reflective cups made of a material having a reflectivity of >80% or a plastic having a transmittance of 30% to 60%, so as to reduce the formation of high-angle side light from the light emitted from the LED chips after the LED chips are packaged
As a possible implementation manner, the light source board 2 further includes a plurality of connector male/female heads disposed on the lower end surface of the PCB board 21, and the connector is connected to the connector male/female heads on the driving board;
as a possible implementation, further, the LED light source 22 comprises a primary optical LENS 221(Molding LENS) on the light emitting surface of the LED light source 22. The optical lens 221 corresponds to the plurality of LED light sources 22 one by one and is disposed on the light emitting surface of the LED light sources 22;
as a possible implementation manner, the divergence angle of the light rays of the LED light source 22 output by the optical penetration 221 is 130-160 degrees.
In addition, as a possible embodiment, the distance between the lower end surface of the diffusion plate 3 and the light source plate 2 is less than or equal to 5 mm.
As one possible implementation, further, the LED light sources 22 are white light sources or blue light sources.
As a possible implementation, the LED light source 22 is a blue light source, and the optical film comprises a quantum dot film 4, a prism sheet 6, a reflective brightness enhancement film 7 or a composite film 8, which can be sequentially disposed above the diffusion plate 3
As a possible embodiment, the LED light source 22 is a blue light source, and the optical film comprises a quantum dot film 4, a diffusion film 5, a prism sheet 6, a reflective brightness enhancement film 7 or a composite film 8, which can be sequentially disposed above the diffusion plate 3
In one possible embodiment, the LED light source 22 is a white light source, and the optical film comprises a diffusion film 5, a prism sheet 6, a reflective brightness enhancement film 7 or a composite film 8, which can be sequentially disposed above the diffusion plate 3
Further, the reflective material of the LED light source 22 may be PCT ((Poly 1, 4-cyclohexanedimethylene terephthalate (Poly1, 4-cyclohexanedimethylene terephthalate)).
Further, the LED light source 22 further includes a powder (filler) with a convergent light emitting angle, and the powder may be SiO2 or TiO 2.
Further, as a possible embodiment, the diffusion plate 3 has a transmittance of 30% to 55%
As one possible embodiment, further, the diffusion plate 3 has a thicker structure and is disposed facing the panel.
As a possible implementation, further, the supporting column 23 is a cubic structure or a frustum structure with its small end located above.
The following is a detailed description of the specific working principle of the present invention:
it can be seen from table 1 that when the CSP LED light source 22 is selected to form the backlight plate, more sidelight proportion can reach the partition boundary, and the LED light source 22 with more sidelight proportion has the advantages that when the LED interval increases, the brightness of the boundary is less likely to decrease and a dark area is less likely to form, so that the uniform surface quality can be achieved by using a larger LED light source 22 interval, but the defects of larger visual halo and low sharpness are caused. However, although the flat cup light source packaged by the white plastic support has less side lights, the dark area is easily formed at the boundary of the subareas under the same interval of the LED light sources 22 due to the smaller light emitting angle, and the uniform surface quality can be achieved at higher cost by reducing the interval of the LED light sources 22 and increasing the LED light sources 22. In summary, for achieving low halo, high sharpness and high contrast display quality, the primary optics of the flat cup and the moving LENS made of white plastic and transparent plastic are better choices, and can be selected according to different light mixing distances and different requirements.
Table 1:
| LED Type | luminous angle | Sidelight ratio | LED Pitch/OD |
| White plastic and flat cup | 120-130 | Is low in | Small |
| White plastic + Molding | 130-160 | Is low in | In (1) |
| Transparent plastic and flat cup | 120-130 | In | In |
| Transparent plastic + Molding | 130-160 | In | Big (a) |
| CSP(Chip scale package) | 100-170 | High (a) | Big (a) |
As shown in fig. 5 and 6, in order to compare the light emitting angles of the long side of the LED light source 22 and the short side of the LED light source 22, the light emitting angles of the LED light source 22 in different packaging types, such as csp (chip scale package), transparent shell flat cup (representing a transparent plastic bracket), and white shell flat cup (a white plastic bracket), are respectively listed. Two different types of LED light sources 22 emitting light patterns as shown in fig. 5 and 6 are compared. As can be seen from fig. 5 and 6, in the direction of a large angle of more than 60 degrees, the side light brightness is CSP > transparent case flat cup > white case flat cup from high to low, and it can be seen that the side light of more than 120 degrees is significantly less than that of CSP LED light source 22 in the LED light source 22 packaged by the reflection cup made of white plastic and the LED light source 22 packaged by the reflection cup made of transparent plastic, which have a reflectance of 80%. Therefore, the LED packaged by the PLCC or PCT reflective cup can greatly reduce the disadvantage that the sharpness and contrast of the non-intended lighting area is reduced when the human eye views the image due to the bright band of the non-intended lighting area generated after the light from the large-angle side of the LED light source 22 is emitted into the adjacent non-lighting sub-area under the display application condition of the sub-area driving.
The LED angle measurement distance is far (mm), so that the fine-taste defect generated at the light mixing distance less than or equal to OD7mm cannot be fully exhibited. As shown in fig. 7, the side light and halo phenomena are repeatedly verified by using the CCD, and it is evident from table 2 that in the single-lighted CCD photo, under the same light intensity, the light irradiation distances of the CSP LED single lighting are all larger than the single lighting irradiation distances of the white plastic support with the reflectivity >80% and the transparent plastic support with partial transmittance (30% to 60% transmittance), specifically, the data pairs are as shown in table 2.
Table 2: CCD repeated verification sidelight and halo phenomenon comparison data table
Therefore, in the light mixing distance design of ≦ OD7mm, the LED pitch is usually between 9-13mm, and thus light beyond a single partition of 9-13mm causes significant halo, so that CSP light source as a small OD direct backlight is prone to display defects.
And then, the lighting area of the center of the liquid crystal panel is controlled to be 200 × 130mm in a partition lighting mode, the brightness distribution on the whole panel is shot by the CCD, as shown in the area schematic of a black-and-white picture shown in fig. 8 as a lighting area, and the CCD picture is presented by the actual brightness distribution of the backlight source formed by the LED lamp panel controlled in a partition mode. As shown in fig. 9, in the CCD shooting, the light emitted from the side of the LED light source 22 beyond the originally lighted sub-area is vignetted to the periphery (light-colored area) and enters the non-lighted sub-area to form a bright band (the part of the sub-area should be completely black on the ideal surface), which causes halo in the human vision and reduces the sharpness and contrast. Comparing the CSP LED light source 22CCD photograph, the bright band width is larger than the LED light source 22 having the reflective cup outside the predetermined display area, and the sharpness is worse and the contrast is relatively lower if the bright band in the non-display area is larger.
As shown in fig. 10, comparing the distribution difference of the luminance curves formed by the two LED light sources 22 under the condition of controlling the central lighting area of the liquid crystal panel by the divisional lighting manner to be 200 × 130mm, it can be seen that in the non-backlight lighting area (the backlight lighting area) other than 200mm, the luminance corresponding to the LED light sources 22 packaged by the white plastic and transparent plastic reflective cups is lower than the luminance corresponding to the CSP at the same distance, so that the LED light sources 22 formed by the reflective cups are better if the display quality with low halo and high contrast is to be achieved. The preferred LED light source 22 is an LED light source 22 having a smaller emission angle, and contributes to reduction of halo, for example, powders having a narrowed emission angle, such as SiO2 and TiO2, are added.
In addition to the comparative data of the handheld optical measuring instrument, when the measuring positions are all set in the non-predetermined lighting area (outside the lighting area of 200 × 130 mm) as shown in fig. 11, the halo brightness of the non-lighting area except the central 1/10 lighting area is compared, as can be seen from the data in table 3, the brightness distribution is controlled only by the backlight partition, and the brightness of the CSP LED light source 22 at the 120mm position of the non-lighting area with the distance from the center being greater than 100mm is higher (25% of the central brightness), while the LED light source 22 formed by using the transparent plastic and the white plastic as the reflective cup material has the lower brightness (23% and 21.8% of the central brightness respectively) at the 120mm position of the non-lighting area, and represents that more side lights are incident into the non-predetermined lighting area, which is the main cause of insufficient brightness; LEDs with white plastic and transparent plastic reflective cups perform better at low halo and high contrast displays than CSP LEDs.
Table 3: non-display area halo brightness table outside central 1/10 lighting area
However, in comparison of the arrangement of the diffusion plate 3, since the deviation amount of the light emitting path after passing through the diffusion plate 3 is smaller, which is helpful for reducing the halo phenomenon, the diffusion plate 3 with higher transmittance and lower haze is preferably selected, and further, the surface with the thicker structure is arranged toward the liquid crystal panel, which is helpful for reducing the halo phenomenon. As shown in fig. 11 or 12, the effect of the diffusion plate 3 structure with the rough surface facing up and down on the halo phenomenon in the display area was compared under a lighting area of 200 × 130mm by CCD imaging. It can be seen that the brightness of the diffuser plate 3 with the rough side facing upward (blue curve) is lower in the non-display area compared to the brightness measured at the same distance from the center, and it can be seen that the diffuser plate 3 with the rough side facing upward (liquid crystal panel direction) has better performance for reducing halo.
In addition, in the existing market, the electric connectors are selected, the multi-PIN circuit routing required by the multi-region fractional division is realized by combining an FFC flat cable connector on a lamp panel and then connecting the FFC flat cable with a linker on the lamp panel and a drive board, so that the drive circuit board is usually locked at the central position behind a mechanism back plate, and the FFC wire is usually arranged at the periphery of the mechanism due to the convenience and smoothness of wire arrangement, so that the peripheral thickness of the mechanism is easily increased by the design; compared with a board-to-board connector, the partition-driven high-image-quality thin display can be directly arranged on a lamp panel under a driving board, can save space required by connection and turning of an FFC flat cable, can avoid thickness increase at the periphery of a mechanism, and has the advantages of high stability, low cost and strong overcurrent capacity, so that the partition-driven high-image-quality thin display architecture design with low halo and high contrast effect is achieved.
As shown in fig. 13, in order to connect the LB and the driver board via the FFC flat cable in a relatively straight line, the FFC connectors are designed on the left and right sides of the back plate, and a space formed by a connector height needs to be left, so that the requirement of thinning both sides cannot be met. As shown in fig. 14, the board-to-board connector can be disposed right behind the back board, the driving board and the LB back male-female connector are directly connected, and the rear housing on the left and right sides of the module is designed without increasing any height, so as to achieve the requirement of thinner appearance.
Compared with the prior art, the invention has the following beneficial effects: with the improvement of the resolution of the display, the contrast and the color gamut on the image quality expression become main key parameters, but the proposal of the invention is mainly used for a direct type backlight module with OD (optical distance) less than or equal to 7mm, the display field of HDR (High Dynamic display contrast) with High contrast, gray scale color gamut, brightness and color expression is achieved by matching local dimming partition driving with QD (quantum dot) quantum dot technology, preferably, an LED light source formed by white plastic with the reflectivity of more than 80 percent or a transparent plastic reflecting cup support with partial penetration rate can be used, an LED support formed by the white plastic of High reflection PLCC (plastic LED Chip carrier) has a bevel edge, the Chip angle side light can be emitted to the upper part of the reflecting cup, the package has fewer side lights and large angle light emission of the LED light source is reduced, because the special match of the white plastic support packaging form is driven by a light field local partition, the LED light source with the primary lens has the advantages that the primary lens can expand the required angle according to the requirements of light mixing distance and partition size, and the LED light source with the primary lens simultaneously has the effects of easily achieving uniform surface taste and improving light efficiency.
It should be apparent that the embodiments described are some, but not all embodiments of the present application. The embodiments and features of the embodiments in the present application may be combined with each other without conflict. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the detailed description of the embodiments of the present application is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
Claims (10)
1. The partition driving thin display with low halation and high contrast comprises a back plate with a concave shell structure, a light source plate, a diffusion plate, an optical diaphragm and a liquid crystal panel, wherein the light source plate, the diffusion plate and the optical diaphragm are sequentially arranged in the concave structure of the back plate; the light source board comprises a PCB board and a plurality of LED light sources which are arranged on the PCB board in a rectangular array; a plurality of support columns for maintaining the light mixing distance are arranged on the upper end face of the PCB at intervals; the LED light sources are divided into a plurality of LED areas, at least one LED light source is arranged in each LED area, and the LED light sources in the same LED area are mutually electrically connected and driven by the same IC circuit; the method is characterized in that: the LED light sources are of a reflecting cup structure, the reflecting cup is made of materials with reflectivity of more than 80% or plastic with penetration rate of 30-60%, and a lamp panel formed by the LED light sources is electrically connected with the board-to-board electric connection mechanism by a board and is driven.
2. A low halo, high contrast, zone driven thin display as claimed in claim 1, wherein: the distance between the lower end face of the diffusion plate and the light source plate is less than or equal to 7 mm.
3. A low halo, high contrast, zone driven thin display as claimed in claim 1, wherein: the reflective material of the reflector cups of several LED light sources is PCT, i.e. poly1, 4-cyclohexanedimethylene terephthalate.
4. A low halo, high contrast, zone driven thin display as claimed in claim 1, wherein: the LED light source contains powder with convergent light-emitting angle, and the powder is SiO 2 Or TiO 2 。
5. A low halo, high contrast, zone driven thin display as claimed in claim 1, wherein: a primary optical lens is arranged on the light emitting surface of the LED light source, and the light divergence angle of the LED light source output by the lens is 130-160 degrees.
6. A low halo, high contrast, zone driven thin display as claimed in claim 1, wherein: the support column is a cubic structure or a frustum-shaped structure with the small head end of the support column positioned above.
7. A low halo, high contrast, zone driven thin display as claimed in claim 1, wherein: the optical film comprises a quantum dot film, a diamond lens, a reflection type brightness enhancement film or a composite film which are arranged on the diffusion plate in sequence; or the optical membrane comprises a quantum dot film, a diffusion film, a prism lens, a reflection type brightness enhancement film or a composite film which are arranged on the diffusion plate in sequence; or the optical film comprises a diffusion film, a diamond lens, a reflection type brightness enhancement film or a composite film which are arranged on the diffusion plate in sequence.
8. A low halo, high contrast, zone driven thin display as claimed in claim 1, wherein: the diffusion plate has a penetration rate of 30-55%, and has a coarse structure surface arranged towards the panel direction.
9. A low halo, high contrast, zone driven thin display as claimed in claim 1, wherein: LED light sources in the same LED area are mutually connected in series and are driven by the same IC circuit; or the LED light sources in the same LED area comprise mutually serial and parallel circuits and are driven by the same IC circuit.
10. A low halo, high contrast, zone driven thin display as claimed in claim 1, wherein: it also includes several electronic components including IC and peripheral circuit; the electronic assembly is arranged on the back face of the lamp panel, or the electronic assembly is arranged on the independent circuit board and is in butt joint with the lamp panel through the board-to-board terminal assembly.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011134669.1A CN112198714B (en) | 2020-10-21 | 2020-10-21 | Low halo high contrast zone driven thin display |
| TW109140274A TWI769587B (en) | 2020-10-21 | 2020-11-18 | Low-halation, high-contrast partition-driven thin-film display |
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| CN202011134669.1A CN112198714B (en) | 2020-10-21 | 2020-10-21 | Low halo high contrast zone driven thin display |
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| CN112198714A CN112198714A (en) | 2021-01-08 |
| CN112198714B true CN112198714B (en) | 2022-09-13 |
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| CN202011134669.1A Active CN112198714B (en) | 2020-10-21 | 2020-10-21 | Low halo high contrast zone driven thin display |
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| TW (1) | TWI769587B (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| TW202217414A (en) | 2022-05-01 |
| TWI769587B (en) | 2022-07-01 |
| CN112198714A (en) | 2021-01-08 |
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