CN213483750U

CN213483750U - Display device

Info

Publication number: CN213483750U
Application number: CN202022643338.2U
Authority: CN
Inventors: 李漫铁; 余亮; 屠孟龙
Original assignee: Huizhou Lehman Optoelectronics Technology Co ltd; Ledman Optoelectronic Co Ltd
Current assignee: Huizhou Lehman Optoelectronics Technology Co ltd; Ledman Optoelectronic Co Ltd
Priority date: 2020-11-16
Filing date: 2020-11-16
Publication date: 2021-06-18
Anticipated expiration: 2030-11-16

Abstract

The utility model relates to a display device, including a plurality of pixel units, every the pixel unit includes the luminous chip of four at least different colours, every among the luminous chip in the pixel unit, at least one luminous chip is blue green light chip. Through having increased a blue and green light chip, four luminous chips form tetragonal colour gamut, and than triangular colour gamut, the display device's of this application colour gamut is wide, and display effect is good.

Description

Display device

Technical Field

The utility model relates to an electronic product technical field especially relates to a display device.

Background

The common LED television adopts the three-primary-color principle, which is the basis of the color television technology.

Images are reproduced in a television apparatus according to the visual characteristics of human eyes. The spectral components of the reflected or transmitted light of the original scenery are not required to be completely reproduced, and only three cone cells of human eyes are imitated. The three primary colors are independent of each other, and any one primary color cannot be obtained by mixing the other two primary colors.

In color television, the three primary colors, red, green and blue, are represented by R, G, B, respectively. The international commission on illumination (CIE) selected the wavelength of the primary color red to be 700nm, the wavelength of the primary color green to be 546.1nm, and the wavelength of the primary color blue to be 435.88 nm. The brightness of the color obtained by mixing the three primary colors is equal to the sum of the brightness of the three primary colors. This mixed color is called additive color mixing. Three beams of red, green and blue round monochromatic light with equal intensity are projected onto a white screen at the same time, so that a three-primary-color point circle appears.

When the LED television provided by the prior art adopts the three primary color principle to display images, the displayed color gamut is limited, and the display effect is not good.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is desirable to provide a display device in view of the above technical problems.

A display device comprises a plurality of pixel units, each pixel unit comprises at least four light-emitting chips with different colors, and at least one light-emitting chip in each pixel unit is a blue-green chip.

In one embodiment, the wavelength band of the blue-green light chip is 480nm-500 nm.

In one embodiment, at least one of the light emitting chips in each pixel unit is a red chip, at least one of the light emitting chips is a green chip, and at least one of the light emitting chips is a blue chip.

In one embodiment, at least one of the light emitting chips in the pixel unit is a vertical chip.

In one embodiment, the display device includes a circuit board, and the light emitting chips in the pixel units are electrically connected to the circuit board.

In one embodiment, the light emitting chips in the pixel unit are arranged in a common cathode mode.

In one embodiment, the light emitting chips in the pixel unit are arranged in a regular polygon.

In one embodiment, the circuit board is provided with a cathode plate, cathodes of the light emitting chips in the pixel units are electrically connected to the cathode plate, and the cathode plate is arranged in the regular polygon.

In one embodiment, the light emitting chips in the pixel unit are arranged in a strip shape.

In one embodiment, the circuit board is provided with a cathode plate and a plurality of anode plates, the number of the anode plates is the same as that of the light-emitting chips in the pixel unit, cathodes of the light-emitting chips in the pixel unit are electrically connected to the cathode plate, anodes of the light-emitting chips in the pixel unit are electrically connected to different anode plates, and the light-emitting chips are located between the cathode plate and the anode plate.

Above-mentioned display device, through having increased a blue and green light chip, four luminous chips form tetragonal colour gamut, and than triangular colour gamut, the display device's of this application colour gamut is wide, and display effect is good.

Drawings

FIG. 1 is a schematic diagram of a pixel unit in a display device according to an embodiment;

FIG. 2 is a schematic diagram of a pixel unit in a display device according to another embodiment;

fig. 3 shows three color gamut diagrams.

Reference numerals: 110. a red light chip; 120. a green chip; 130. a blue light chip; 140. a blue-green chip; 150. a circuit board; 151. a cathode plate; 152. and (4) an anode plate.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

One embodiment of the present application provides a display device for displaying an image. The display device can be, for example, a display screen of a television, a display screen of a mobile phone, a display screen of outdoor advertisement and the like.

The display device comprises a plurality of pixel units, each pixel unit can be approximately seen as a point when viewed from a far place, the pixel units are arranged according to a certain rule, and each pixel unit can be independently lightened or extinguished. For example, when a plurality of pixel cells in one display region are turned off or turned on, a specific pattern can be displayed in the display region.

Fig. 1 is a schematic structural diagram of a pixel unit in a display device in an embodiment. In the embodiment shown in fig. 1, each pixel unit includes four light emitting chips. Fig. 2 is a schematic structural diagram of a pixel unit in a display device in another embodiment, and in the embodiment shown in fig. 2, each pixel unit also includes four light emitting chips. The four light emitting chips can be independently turned on or off. In other embodiments, each pixel unit may include five light emitting chips, six light emitting chips, or more light emitting chips.

That is to say, each pixel unit in the display device provided in the embodiments of the present application includes at least four light emitting chips, and the light emitting chips are arranged according to a certain rule. Where each pixel cell is small enough and can be considered as a dot, in the structures shown in fig. 1 and 2, the pixel cells are enlarged for clarity to show the specific structure of the pixel cell. The pixel units in the display device may be arranged in a rectangular array, or may be arranged in other ways. At least one of the light emitting chips in each pixel unit is a blue-green chip 140.

The light emitting chip may be, for example, a light emitting diode. One pixel unit at least comprises four light emitting diodes with different colors, and different light emitting diodes in one pixel unit can emit different brightness when different voltages are applied. The light emitting diodes with different colors and different brightness can be configured into different colors, and the sum of the numbers of the colors is called the color gamut of the display device. Color gamut is a method of encoding a color and also refers to the sum of colors that a technical system is capable of producing.

Fig. 3 shows three color gamut diagrams. In the figure a represents the spectral gamut. b is a triangle, representing the RGB gamut map. c denotes a color gamut of the display device in one embodiment of the present application. In the figure, point R represents a chromaticity coordinate point of the red primary color, point G represents a chromaticity coordinate point of the green primary color, and point B represents a chromaticity coordinate point of the blue primary color. The size of the area enclosed by the area of the triangular area b represents the size of the RGB color gamut. The BG point represents a chromaticity coordinate point of cyan, and the area enclosed by the quadrilateral area represents the color gamut of the display device in the embodiment of the present application. As can be seen from the figure, the color gamut of the display device in the embodiment of the present application is larger than the RGB color gamut.

For example, in the embodiment shown in fig. 1, four light emitting chips are included in one pixel unit. One light emitting chip is a red light chip 110, one green light chip 120, one blue light chip 130, and one blue-green light chip 140.

In one embodiment, the blue chip 130 has a wavelength range of 430nm to 450nm, the green chip 120 has a wavelength range of 460nm to 480nm, the blue-green chip 140 has a wavelength range of 480nm to 500nm, and the red chip 110 has a wavelength range of 620nm to 630 nm. If the pixel unit of the display device includes only three of the four light emitting chips, the color gamut of the display device including the four light emitting chips is significantly larger than the color gamut of the display device including the three light emitting chips.

The light emitting chip in the pixel unit in one embodiment may include a front-mounted chip, a flip chip, and a vertical chip. The front-mounted chip size makes the pitch of the light emitting chips in the pixel unit large, and the flip chip enables the pitch of the light emitting chips in the pixel unit small, but the flip chip is more expensive to produce than the front-mounted chip. The vertical chip has the advantages of small distance between the light emitting chips in the pixel unit and low cost. Therefore, in one embodiment, at least one of the light emitting chips in the pixel unit is a vertical chip. For example, among at least four chips in the pixel unit, the vertical chips may be disposed as one, two, three, or four.

As shown in fig. 1 and 2, the display device includes a circuit board 150, and the light emitting chips in the pixel unit are all disposed on the circuit board 150, and each of the light emitting chips is electrically connected to a circuit on the circuit board 150.

In one embodiment, the light emitting chips in the pixel cells of the display device are arranged in common cathode. When the common cathode is arranged, the cathodes of the light-emitting chips in each pixel unit are connected together, and the anodes of the light-emitting chips are used for driving the light-emitting chips to emit light. As shown in fig. 1 and 2, cathodes of the red chip 110, the blue chip 130, the cyan chip 140, and the green chip 120 in the display unit are connected together. Of course, in other embodiments, the light emitting chips in the pixel units of the display device may also be arranged in a common anode manner, that is, the anodes of the light emitting chips in each pixel unit are connected together, and the cathodes of the light emitting chips are used for driving the light emitting chips to emit light.

In the embodiment shown in fig. 1, the light emitting chips in the pixel unit are arranged in a quadrangle.

In some embodiments, when the pixel unit includes four or more light emitting chips, the light emitting chips are arranged in a regular polygon.

For example, when the pixel unit includes four light emitting chips, the four light emitting chips may be arranged in a square shape, and the centers of the four light emitting chips are located at four vertices of the square shape.

For example, when the pixel unit includes five light emitting chips, the five light emitting chips may be arranged in a regular pentagon, and the centers of the five light emitting chips are located at five vertices of the regular pentagon.

Therefore, the pitches of adjacent chips in each pixel unit are the same, and the light emission uniformity of the pixel unit is good.

As shown in fig. 1, the circuit board 150 is provided with a cathode plate 151, cathodes of the light emitting chips in the pixel units are electrically connected to the cathode plate 151, and the cathode plate 151 is disposed within a regular polygon. If the cathode plate 151 is disposed outside the regular polygon, the distance between the cathode plate 151 and some light emitting chips is significantly greater than that between the cathode plate 151 and other light emitting chips, which is inconvenient to process. The polar plates are arranged in the regular polygon, so that vacant positions on the pixel units can be reasonably utilized, the distance between the negative plate 151 and each light-emitting chip is approximately the same, and the processing is more convenient.

As shown in fig. 2, the light emitting chips in the pixel unit are arranged in a bar shape. Specifically, the centers of the light emitting chips in the pixel unit may be approximately located on one straight line. The arrangement mode is suitable for the display device with larger pixel distance, and the processing is more convenient.

As shown in fig. 2, the circuit board 150 is provided with a cathode plate 151 and a plurality of anode plates 152, the number of the anode plates 152 is the same as the number of the light emitting chips in the pixel unit, the cathodes of the light emitting chips in the pixel unit are electrically connected to the cathode plate 151, the anodes of each light emitting chip in the pixel unit are electrically connected to different anode plates 152, and the light emitting chips are located between the cathode plate 151 and the anode plates 152. For example, the circuit board 150 is provided with a cathode plate 151 and four anode plates 152, and the pixel unit includes four light emitting chips. The cathodes of the four light emitting chips are electrically connected to the same cathode plate 151. The anodes of the four light emitting chips are respectively connected to different anode plates 152, and the four light emitting chips are driven by the anode plates 152 to independently emit light.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A display device is characterized by comprising a plurality of pixel units, wherein each pixel unit comprises at least four light-emitting chips with different colors, and at least one light-emitting chip in each pixel unit is a blue-green light chip (140).

2. The display device according to claim 1, wherein the blue-green chip (140) has a wavelength band of 480nm to 500 nm.

3. The display device according to claim 1, wherein at least one of the light emitting chips in each pixel unit is a red chip (110), at least one of the light emitting chips is a green chip (120), and at least one of the light emitting chips is a blue chip (130).

4. The display device according to claim 1, wherein at least one of the light emitting chips in the pixel unit is a vertical chip.

5. The display device according to claim 1, wherein the display device comprises a circuit board (150), and the light emitting chips in the pixel units are electrically connected to the circuit board (150).

6. The display device according to claim 5, wherein the light emitting chips in the pixel unit are arranged in common with a cathode.

7. The display device according to claim 6, wherein the light emitting chips in the pixel unit are arranged in a regular polygon.

8. The display device according to claim 7, wherein a cathode plate (151) is disposed on the circuit board (150), cathodes of the light emitting chips in the pixel units are electrically connected to the cathode plate (151), and the cathode plate (151) is disposed within the regular polygon.

9. The display device according to claim 6, wherein the light emitting chips in the pixel unit are arranged in a stripe shape.

10. The display device according to claim 9, wherein a cathode plate (151) and a plurality of anode plates (152) are disposed on the circuit board (150), the number of the anode plates (152) is the same as the number of the light emitting chips in the pixel unit, the cathodes of the light emitting chips in the pixel unit are electrically connected to the cathode plate (151), the anode of each light emitting chip in the pixel unit is electrically connected to a different anode plate (152), and the light emitting chip is located between the cathode plate (151) and the anode plate (152).