CN220730579U - High-contrast display device - Google Patents
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- CN220730579U CN220730579U CN202322548816.5U CN202322548816U CN220730579U CN 220730579 U CN220730579 U CN 220730579U CN 202322548816 U CN202322548816 U CN 202322548816U CN 220730579 U CN220730579 U CN 220730579U
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- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 77
- 239000011324 bead Substances 0.000 claims abstract description 45
- 230000003287 optical effect Effects 0.000 claims abstract description 12
- 238000009792 diffusion process Methods 0.000 claims description 15
- 239000012788 optical film Substances 0.000 claims description 14
- 239000011521 glass Substances 0.000 claims description 6
- 239000003086 colorant Substances 0.000 description 12
- 239000010408 film Substances 0.000 description 11
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Abstract
The utility model provides a high-contrast display device which is applied to the technical field of liquid crystal display, wherein a first liquid crystal layer, a first optical module, a first LED lamp panel, a second liquid crystal layer, a second optical module and a second LED lamp panel are sequentially arranged from top to bottom, the first LED lamp panel comprises a plurality of Mini LED R.G.B.W lamp beads which are arranged in an array manner, and a driving piece for driving the mini LED R.G.B.W lamp beads to emit light is arranged on the first LED lamp panel; the first liquid crystal layer, the second liquid crystal layer, the first LED lamp panel and the second LED lamp panel are respectively and electrically connected with the main control device. According to the high-contrast display device, the backlight is provided for the first liquid crystal layer through the colored lamp beads on the first LED lamp panel, so that the same pixel point of the first liquid crystal layer without the colored filter film can be different in color, the contrast of brightness and darkness is increased, and the loss is reduced.
Description
Technical Field
The utility model belongs to the technical field of liquid crystal display, and particularly relates to a high-contrast display device.
Background
The LCD screen, english is one kind of planar display for TV set and computer. The display screen has the advantages of low power consumption, small volume and low radiation. The liquid crystal display uses a liquid crystal solution in two sheets of polarizing material, and when a voltage is applied to the liquid, the liquid crystal is rearranged for imaging purposes.
The Chinese patent with publication number CN116047813B, named as a high-contrast display device and a high-contrast display system, discloses that backlight is provided by a second LED lamp panel to a liquid crystal layer, and light is driven by a smaller power to emit light from a lamp bead on the first LED lamp panel by utilizing the photosensitive characteristic of a photosensitive element, so that the contrast of the display device can be improved by the lower power.
However, as the liquid crystal layer I of the scheme adopts the liquid crystal glass with the color filter film, the light transmittance of the color filter film is only 20-30%, the light loss is large, and the energy saving is not facilitated. Therefore, there is a need to provide a display device, which eliminates the color filter film, improves the circuit structure, and further reduces the light loss.
Disclosure of Invention
In view of the above problems in the prior art, an object of the present utility model is to provide a high-contrast display device, in which a backlight is provided to a first liquid crystal layer by using color beads on a first LED panel, so that the same pixel point of the first liquid crystal layer without a color filter can display different colors, thereby increasing the contrast between light and shade and reducing the loss.
The display device with high contrast is provided with a first liquid crystal layer, a first optical module, a first LED lamp panel, a second liquid crystal layer, a second optical module and a second LED lamp panel in sequence from top to bottom, wherein the first LED lamp panel comprises a plurality of Mini LED R.G.B.W lamp beads which are arranged in an array manner, and a driving piece for driving the Mini LED R.G.B.W lamp beads to emit light is arranged on the first LED lamp panel;
the first liquid crystal layer, the second liquid crystal layer, the first LED lamp panel and the second LED lamp panel are respectively and electrically connected with the main control device.
In order to timely control the light of the lamp beads with the required colors, the Mini LED R lamp beads, the Mini LED G lamp beads, the Mini LED B lamp beads and the Mini LED W lamp beads are respectively and electrically connected with the CMOS switch, and the main control device controls the on-off of the CMOS switch.
In order to drive the lamp beads to emit light by using the low-power signals, the driving piece is a light sensing element, the light sensing element is positioned between the first LED lamp panel and the second liquid crystal layer and is used for sensing and conducting light signals transmitted through the second liquid crystal layer, one light sensing element corresponds to one or more lamp beads on the first LED lamp panel, and the light sensing element is connected with the lamp beads at the corresponding positions in series.
In order to provide power for the light sensing element, the light sensing element is electrically connected with the constant current source.
In order to avoid energy loss of the color filter film, the first liquid crystal layer is liquid crystal glass of the achromatic color filter film.
In order to make the light irradiated on the first liquid crystal layer and the second liquid crystal layer uniform, the first optical module comprises a first optical film and a first diffusion plate, the second optical module comprises a second optical film and a second diffusion plate, the first optical film is positioned above the first diffusion plate, and the second optical film is positioned above the second diffusion plate.
The beneficial effects of the utility model are as follows: according to the high-contrast display device, the on-off of the CMOS switch at the corresponding position is controlled by the main control device, the lamp beads with different colors can be conducted to emit light, backlight is provided for the liquid crystal layer I through the colored lamp beads on the LED lamp panel I, the same pixel point of the liquid crystal layer I without the colored filter film can be in different colors, and compared with the liquid crystal glass with the colored filter film in the prior art, the loss of the colored filter film to light can be avoided, so that the effects of reducing energy consumption and saving energy are achieved;
in addition, the driving piece can convert light intensity into current with corresponding magnitude, the driving piece senses light of corresponding intensity emitted by the light-driven LED lamp panel of the LED lamp panel II penetrated by the liquid crystal layer II, and the light-dark contrast ratio of the display device can be improved by utilizing the double-layer liquid crystal layer structure.
Drawings
The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model. In the drawings:
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a diagram showing the correspondence between the second LED lamp panel, the first LED lamp panel and the light sensing element in the first embodiment of the present utility model;
FIG. 3 is a schematic diagram of a circuit connection between a first light bead on an LED lamp panel and a light sensing element at a corresponding position according to the first embodiment of the present utility model;
fig. 4 is a schematic circuit connection diagram of a light bulb on a first LED lamp panel and a light sensing element at a corresponding position in a second embodiment of the present utility model;
fig. 5 is a functional block diagram of the present utility model.
Marked in the figure as: 1. a first liquid crystal layer; 2. an optical film I; 3. a diffusion plate I; 4. an LED lamp panel I; 5. a second liquid crystal layer; 6. an optical film II; 7. a diffusion plate II; 8. an LED lamp panel II; 9. a light-sensitive element.
Detailed Description
Example 1
As shown in fig. 1, a high-contrast display device is provided with a first liquid crystal layer 1, a first optical film 2, a first diffusion plate 3, a first LED lamp panel 4, a second liquid crystal layer 5, a second optical film 6, a second diffusion plate 7 and a second LED lamp panel 8 from top to bottom.
The first optical film 2, the first diffusion plate 3, the second optical film 6 and the second diffusion plate 7 are all used for performing diffusion shaping on the optical signals, so that the optical signals are uniformly projected onto the first liquid crystal layer 1 or the second liquid crystal layer 5 at corresponding positions.
As shown in fig. 1 and 3, the first liquid crystal layer 1 is a liquid crystal glass with an achromatic color filter, the first LED lamp panel 4 includes a plurality of mini LED r.g.b lamp beads arranged in an array, a driving piece for driving the mini LED r.g.b lamp beads to emit light is mounted on the first LED lamp panel 4, the mini LED r.g.b lamp beads are respectively and electrically connected with the CMOS switch, the main control device controls the on-off of the CMOS switch, the lamp beads with different colors can be conducted to emit light, backlight is provided for the first liquid crystal layer 1 through the chromatic color lamp beads on the first LED lamp panel 4, and the same pixel point of the first liquid crystal layer 1 without the chromatic filter can display different colors.
In addition, red, green and blue lights directly emitted by the Mini LED R.G.B lamp beads provide backlight for the first liquid crystal layer 1, so that the loss of the color filter film on the existing liquid crystal glass to light can be avoided, and the utilization rate of the first 4-light energy source of the LED lamp panel is improved.
As shown in fig. 2 and 3, the driving element is a light sensing element 9, the light sensing element 9 may be a photoresistor, a photosemiconductor, a photodiode, a phototransistor, etc., the model of the light sensing element 9 may be BPT-BP0934, the light sensing element 9 is located between the first LED panel 4 and the second liquid crystal layer 5, and is used for sensing and conducting the light signal passing through the second liquid crystal layer 5, the light sensing element 9 can convert the sensed light signal into a current signal with a corresponding size, and since one light sensing element 9 corresponds to one or more beads on the first LED panel 4, the light sensing element 9 is connected in series with the corresponding position of the beads, and the light sensing element 9 is electrically connected with the constant current source, when the light sensing element 9 senses the light signal and conducts, the corresponding size of the current signal is generated, so that the beads in series emit light with different intensities, and compared with the display process in the prior art, the process can make the bright area of the display image brighter and the dark area darker, thereby improving the contrast of the image.
In addition, as shown in fig. 1 to 5, the first liquid crystal layer 1, the second liquid crystal layer 5, the first LED lamp panel 4 and the second LED lamp panel 8 are respectively electrically connected with a main control device, and the main control device controls on-off of the CMOS switch. The main control device comprises an FPGA chip and an SOC chip and is used for transmitting signals. The SOC chip transmits synchronous image signals to the first liquid crystal layer 1 and the second liquid crystal layer 5, the FPGA chip transmits synchronous PWM signals to the first LED lamp panel 4 and the second LED lamp panel 8, and the FPGA chip transmits signals to the CMOS switches at corresponding positions respectively according to the color information of the image, so that the on-off of the CMOS switches is controlled.
Specifically, the second LED lamp panel 8 provides backlight for the second liquid crystal layer 5 according to PWM signals provided by the FPGA chip, and the second liquid crystal layer 5 turns over liquid crystal molecules at corresponding positions according to image signals transmitted by the SOC chip to play a role of a liquid crystal light valve; at this time, the light emitted by the second LED lamp panel 8 is emitted into the light sensing element 9 through the second liquid crystal layer 5, and after the light sensing element 9 senses a corresponding light signal, the light signal is converted into an electrical signal according to the light intensity, so as to drive the mini LED r.g.b lamp bead on the first LED lamp panel 4 to emit light.
In addition, the first LED lamp panel 4 needs to emit red light, green light and blue light respectively to provide backlight for the first liquid crystal layer 1 without the color filter film, so that the FPGA chip divides color image signals into signals of three colors of red, green and blue and outputs the signals to the SOC chip in turn, the SOC chip is enabled to send the signals to the first liquid crystal layer 1 and the second liquid crystal layer 5, and the first liquid crystal layer 1 and the second liquid crystal layer 5 are enabled to scan line by line, so that liquid crystal inversion is achieved.
Simultaneously, the FPGA chip synchronously outputs signals of three colors to a CMOS switch connected with the Mini LED R.G.B lamp bead in the LED lamp panel I4. Specifically, the CMOS switch controlling the red light bead is defined as R-CMOS, the CMOS switch controlling the green light bead is defined as G-CMOS, and the CMOS switch controlling the blue light bead is defined as B-CMOS.
When the control signal of the R-CMOS arrives, all red lamp beads emit light due to conduction, the lights of other colors are turned off, when the control signal of the G-CMOS arrives, all green lamp beads emit light due to conduction, the lights of other colors are turned off, and when the control signal of the B-CMOS arrives, all blue lamp beads emit light due to conduction, and the lights of other colors are turned off. As the red light, the blue light and the green light can be emitted at the same pixel point, compared with the prior art, the resolution of the structure is improved.
The color lamp beads at corresponding positions can be conducted and emit light with corresponding intensity under the combined action of the CMOS switch and the light sensing element 9, so that the first liquid crystal layer 1 can display color images, the bright areas of the color images are brighter, the dark areas of the color images are darker, the light and dark contrast ratio of the display device can be improved through the double-layer liquid crystal layer structural design, and the light loss can be reduced through the structural design of the color lamp beads and the first liquid crystal layer 1 of the achromatic color filter film.
Example two
As shown in fig. 4 and 5, the structure of the present embodiment is substantially the same as that of the first embodiment, except that: the first lamp panel 4 in this embodiment includes a plurality of mini LEDs r.g.b.w lamp beads arranged in an array. When the liquid crystal display device works, the FPGA chip divides the color signals into four color signals of R.G.B.W, outputs the four color signals in turn, and synchronously sends the four color signals to the first liquid crystal layer 1 and the second liquid crystal layer 5 respectively, so that the first liquid crystal layer 1 and the second liquid crystal layer 5 scan line by line, and the liquid crystal is turned over; simultaneously, the FPGA chip synchronously outputs signals of four colors to the CMOS switch connected with the Mini LED R.G.B.W lamp bead in the first LED lamp panel 4, and controls the on-off of the CMOS switch at the corresponding position.
The operation of the image display in this embodiment is basically the same as that in the first embodiment, except that the number of transmitted signals is different according to the color of the lamp beads.
The foregoing description is only a preferred embodiment of the present utility model, and the present utility model is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present utility model has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (6)
1. The display device with high contrast is characterized in that a first liquid crystal layer (1), a first optical module, a first LED lamp panel (4), a second liquid crystal layer (5), a second optical module and a second LED lamp panel (8) are sequentially arranged from top to bottom, the first LED lamp panel (4) comprises a plurality of Mini LED R.G.B.W lamp beads which are arranged in an array manner, and a driving piece for driving the Mini LED R.G.B.W lamp beads to emit light is arranged on the first LED lamp panel (4);
the first liquid crystal layer (1), the second liquid crystal layer (5), the first LED lamp panel (4) and the second LED lamp panel (8) are respectively and electrically connected with the main control device.
2. The high-contrast display device according to claim 1, wherein the Mini LED R, G, B and W beads are electrically connected to the CMOS switch, respectively, and the main control device controls the on/off of the CMOS switch.
3. The high-contrast display device according to claim 1, wherein the driving element is a light sensing element (9), the light sensing element (9) is located between the first LED lamp panel (4) and the second liquid crystal layer (5) and is used for sensing and conducting a light signal transmitted through the second liquid crystal layer (5), one light sensing element (9) corresponds to one or more light beads on the first LED lamp panel (4), and the light sensing element (9) is connected in series with the light beads at the corresponding position.
4. A high contrast display device according to claim 3, characterized in that the light-sensing element (9) is electrically connected to a constant current source.
5. The high contrast display device according to claim 1, wherein the first liquid crystal layer (1) is a liquid crystal glass of an achromatic filter.
6. The high contrast display device of claim 1, wherein the first optical module comprises a first optical film (2) and a first diffusion plate (3), the second optical module comprises a second optical film (6) and a second diffusion plate (7), the first optical film (2) is located above the first diffusion plate (3), and the second optical film (6) is located above the second diffusion plate (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322548816.5U CN220730579U (en) | 2023-09-19 | 2023-09-19 | High-contrast display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322548816.5U CN220730579U (en) | 2023-09-19 | 2023-09-19 | High-contrast display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220730579U true CN220730579U (en) | 2024-04-05 |
Family
ID=90491062
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322548816.5U Active CN220730579U (en) | 2023-09-19 | 2023-09-19 | High-contrast display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220730579U (en) |
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2023
- 2023-09-19 CN CN202322548816.5U patent/CN220730579U/en active Active
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