CN207440476U - A kind of split type liquid crystal of combination instrument - Google Patents
A kind of split type liquid crystal of combination instrument Download PDFInfo
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- CN207440476U CN207440476U CN201721415957.8U CN201721415957U CN207440476U CN 207440476 U CN207440476 U CN 207440476U CN 201721415957 U CN201721415957 U CN 201721415957U CN 207440476 U CN207440476 U CN 207440476U
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- liquid crystal
- stent
- led backlight
- scattering sheet
- split type
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Abstract
The utility model proposes a kind of combination instruments with split type liquid crystal, including LED backlight, liquid crystal stent, scattering sheet and liquid crystal display, the liquid crystal stent is structure flat and in bowl-shape reflective surface, and it is provided on the planar base surface of the liquid crystal stent and coincide with the corresponding honeycomb of LED backlight, the LED backlight in the honeycomb described in being installed on；The combination instrument wiring board is in liquid crystal frame bottom and circuit connection LED backlight；The scattering sheet is installed on the liquid crystal cantilever tip, and liquid crystal display is installed in the scattering sheet.The utility model can either effectively solve the problems, such as split liquid crystal display brightness irregularities, eliminate hot spot phenomenon, while can make liquid crystal cost again compared with liquid crystal module reduction by 50% or so, economical and practical.
Description
Technical field
The utility model is related to automobile instrument technical field of liquid crystal display, are used more particularly to a kind of combination instrument
Split type liquid crystal.
Background technology
At present, domestic automobile combination instrument uses liquid crystal module mostly in industry, though display effect is preferable, liquid crystal cost
Compare it is high, cause the combination instrument entirety level of profitability decline.Some Domestic instrument enterprise is attempted using lower-cost split type
Liquid crystal approach, due to not grasping the design method of split LCD backlight, though spend a large amount of manpower and materials repeatedly change mold and
Scheme, there are still the problem of liquid crystal display display brightness is uneven, hot spot is apparent, it is impossible to reach expected display effect.Therefore automobile
Combination instrument need one kind can reach good display effect and split type liquid crystal.
Utility model content
The utility model proposes a kind of combination instruments with split type liquid crystal, can either effectively solve split liquid crystal display brightness
Non-uniform problem eliminates hot spot phenomenon, while can make liquid crystal cost again compared with liquid crystal module reduction by 50% or so, economical and practical.
What the technical solution of the utility model was realized in：
A kind of split type liquid crystal of combination instrument, it is described including LED backlight 1, liquid crystal stent 2, scattering sheet 3 and liquid crystal display 4
Liquid crystal stent 2 is structure flat and in bowl-shape reflective surface, and is provided on the planar base surface of the liquid crystal stent 2 and 1 phase of LED backlight
Corresponding honeycomb, the LED backlight 1, which is coincide, to be installed in the honeycomb；The combination instrument wiring board 5 is in liquid crystal
2 bottom of stent and circuit connection LED backlight 1；The scattering sheet 3 is installed on 2 top of liquid crystal stent, in the scattering sheet 3
Liquid crystal display 4 is installed.
Preferably, the honeycomb is away from P=11mm.
Preferably, 3 front of scattering sheet is printed on astigmatism ink.
Preferably, the distance between the scattering sheet 3 and LED backlight 1 is that the ratio relation of light mixing distance H=8mm, H and P are expired
Sufficient even light mixing mathematical model.
Preferably, the liquid crystal display 4 is 3.5 cun, long 92mm, the dot matrix screen of width 46mm.
What the utility model generated has the beneficial effect that：The utility model is joined by mixed lights such as LED spacing P, light mixing distance H
Number calculates the brightness value of any point in illumination region, and maximal illumination and minimal illumination are calculated with this, equal so as to calculate brightness
Even property, it is established that the mathematical model of even light mixing analysis.The utility model is based on the mathematical model, devises split liquid crystal
The lighting system of " flat+bowl-shape reflective surface " honeycomb structure, solves the problems, such as split liquid crystal display brightness irregularities, and significantly
Reduce liquid crystal cost.The utility model has the characteristics that realize that convenient, low cost, reliability are high.The utility model is mainly used
In the automobile combination meter that liquid crystal display is 3.5 cun or so.
Description of the drawings
It in order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is LED luminous intensity distribution schematic diagrams.
Fig. 2 is LED backlight arrangement schematic diagram.
Fig. 3 is maximal illumination approximate calculation scheme.
Fig. 4 is minimal illumination approximate calculation scheme.
Fig. 5 is even light mixing mathematical model.
Fig. 6 is the structure diagram of the utility model.
Specific embodiment
The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out
It clearly and completely describes, it is clear that the described embodiments are only a part of the embodiments of the utility model rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are without making creative work
All other embodiments obtained shall fall within the protection scope of the present invention.
As shown in Figure 1, usually LED light emitting angles are in lambertian distribution, I0For LED center normal direction light intensity, shine for LED
Maximum in intensity, radius be in cosine distribution, D (X, Y) be light shadow surface measurement point, the light intensity of the measurement point
For Iθ, as shown in formula (1)：
Wherein, IθFor the light intensity of measurement point, I0For LED center normal direction largest light intensity, θ is measurement light and center method
The angle of line, H are light mixing distance, and r is the distance between LED centres of luminescence point and measurement point D.
As shown in Fig. 2, matrix arrangement of the LED backlight in a m rows n row, the LED for defining i rows j row is Lij, define first
The LED, L that row one arranges11Coordinate (x1,y1) it is coordinate origin.X-direction LED spacing is Px, Y-direction LED spacing is Py, then LijIt sits
It is designated as [x1+(i-1)Px,y1+(j-1)Py], measurement point D (X, Y) and LijDistance rijAs shown in formula (2)：
In formula (2), rijFor LijThe distance between centre of luminescence point and measurement point D, H is light mixing distance.
Available, light intensity Is of all LED at measurement point D, as shown in formula (3) by formula (1), formula (2)：
Since illumination is defined as the light intensity in plane of illumination unit solid angle, i.e. illumination L at measurement point D is：
As shown in figure 3, work as Px=PyDuring=P, no matter the line number columns of LED matrix is how many, the maximal illumination on shadow surface
Lmax is shone by any LED in matrix and its periphery 4 closest LED adjacent thereto obtained by contribution.According to formula (4)
Approximate calculation is drawn：
As shown in figure 4, work as Px=PyDuring=P, no matter the line number columns of LED matrix is how many, the minimal illumination on shadow surface
Lmin is shone by adjacent 4 LED (2 × 2 matrixes) in matrix obtained by contribution.It is drawn according to formula (4) approximate calculation：
As shown in Figure 5.The mathematical model of even light mixing is calculated according to formula (5), formula (6), obtains uniformity U and mixed light
Relation between parameter H, P：
Wherein
According to the even light mixing mathematical model that formula (7) obtains, the arrangement relation of split type LCD backlight is calculated, is drawn
Light mixing distance H is 8mm, and LED spacing P is 11mm, and the split type liquid of " flat+bowl-shape reflective surface " honeycomb structure is designed with this
Crystalline substance, i.e., the split type liquid crystal of combination instrument described in the utility model.
As shown in fig. 6, including LED backlight 1, liquid crystal stent 2, scattering sheet 3 and liquid crystal display 4, the liquid crystal stent 2 is flat
And in the structure of bowl-shape reflective surface, and it is provided on the planar base surface of the liquid crystal stent 2 and 1 corresponding honeycomb of LED backlight, institute
LED backlight 1 is stated to coincide in the honeycomb described in being installed on；The combination instrument wiring board 5 is in 2 bottom of liquid crystal stent and circuit
Connect LED backlight 1；The scattering sheet 3 is installed on 2 top of liquid crystal stent, plays a part of even light；In the scattering sheet 3
Liquid crystal display 4 is installed, mainly plays a part of showing information.
In the utility model, LED backlight 1 is inserted in the honeycomb of liquid crystal stent 2, and several 1 matrix arrangements of LED backlight are formed
Honeycomb structure, honeycomb is away from P=11mm；3 front of scattering sheet is printed on the astigmatism ink of enough increase scattering sheet mist degrees；Scattering sheet 3 with
Distance between LED backlight 1 is that the ratio relation of light mixing distance H=8mm, H and P meet even light mixing mathematical model；The liquid
Crystalline substance screen 4 is 3.5 cun, long 92mm, the dot matrix screen of width 46mm.
LED backlight 1 is arranged in arrays to form honeycomb backlight, the light that LED backlight 1 is sent, by 2 one spacing of liquid crystal stent
The multiple reflections of the bowl-shape inner wall of mixed light and stent and scattering sheet 3 from H, area source is directly formed by LED point light source, is uniformly shone
It penetrates on liquid crystal display 4.Therefore split liquid crystal display brightness irregularities can effectively be solved the problems, such as, eliminate hot spot phenomenon.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modifications, equivalent replacements and improvements are made should be included in the utility model
Protection domain within.
Claims (5)
1. the split type liquid crystal of a kind of combination instrument, which is characterized in that including LED backlight (1), liquid crystal stent (2), scattering sheet
(3) and liquid crystal display (4), the liquid crystal stent (2) is structure flat and in bowl-shape reflective surface, and the liquid crystal stent (2)
Be provided on planar base surface with LED backlight (1) corresponding honeycomb, the LED backlight (1), which is coincide, is installed on the honeycomb
It is interior；The combination instrument wiring board (5) is in liquid crystal stent (2) bottom and circuit connection LED backlight (1)；The scattering sheet (3)
Liquid crystal stent (2) top is installed on, liquid crystal display (4) is installed on the scattering sheet (3).
2. the split type liquid crystal of a kind of combination instrument as described in claim 1, which is characterized in that the honeycomb is away from P=
11mm。
A kind of 3. split type liquid crystal of combination instrument as described in claim 1, which is characterized in that scattering sheet (3) front
It is printed on astigmatism ink.
4. the split type liquid crystal of a kind of combination instrument as described in claim 1, which is characterized in that the scattering sheet (3) and LED
Distance between backlight (1) is that the ratio relation of light mixing distance H=8mm, H and P meet even light mixing mathematical model.
5. the split type liquid crystal of a kind of combination instrument as described in claim 1, which is characterized in that the liquid crystal display (4) is 3.5
It is very little, long 92mm, the dot matrix screen of width 46mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721415957.8U CN207440476U (en) | 2017-10-30 | 2017-10-30 | A kind of split type liquid crystal of combination instrument |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721415957.8U CN207440476U (en) | 2017-10-30 | 2017-10-30 | A kind of split type liquid crystal of combination instrument |
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| CN207440476U true CN207440476U (en) | 2018-06-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107976842A (en) * | 2017-10-30 | 2018-05-01 | 东风汽车电子有限公司 | A kind of split type liquid crystal of combination instrument |
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2017
- 2017-10-30 CN CN201721415957.8U patent/CN207440476U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107976842A (en) * | 2017-10-30 | 2018-05-01 | 东风汽车电子有限公司 | A kind of split type liquid crystal of combination instrument |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 441000 Jiangshan South Road Venture Center, Xiangyang High-tech Zone, Hubei Province Patentee after: Dongfeng Power Drive System Co., Ltd. Address before: 441001 Jiangshan South Road Venture Center, Xiangyang High-tech Zone, Hubei Province Patentee before: DONGFENG AUTOMOBILE ELECTRONICS CO., LTD. |
|
| CP03 | Change of name, title or address |