Micro light emitting diode display device

Abstract

The application discloses a micro light emitting diode display device. Each pixel unit of a display panel comprises a first display pixel and a second display pixel. The first display pixel comprises a first sub-pixel, a second sub-pixel and a third sub-pixel. The second display pixel comprises a fourth sub-pixel, a fifth sub-pixel and a sixth sub-pixel. The peak wavelength of the fourth sub-pixel is less than that of the first sub-pixel. The peak wavelength of the fifth sub-pixel is greater than that of the second sub-pixel. The brightness of the second display pixel is greater than that of the first display pixel under the same radiation rate. The color gamut range of the first display pixel is greater than that of the second display pixel. A control unit controls a driving unit to selectively drive the first display pixels or the second display pixels of the pixel units.

Description

Technical Field

[0001] The present invention relates to a display device, and more particularly to a micro light emitting diode display device with dual-mode display. Background Art

[0002] As the world focuses on future display technologies, micro-LEDs (Micro LEDs / μLEDs) are among the most promising. Simply put, Micro LEDs involve miniaturizing and matrixing LEDs, neatly arranging millions or even tens of millions of LEDs, each less than 100 microns in size—thinner than a human hair—on a substrate. Compared to current organic light-emitting diode (OLED) display technology, Micro LEDs also emit their own light, but due to their use of different materials, they can overcome OLED's most critical issue, namely "burn-in." They also offer advantages such as low power consumption, high contrast, a wide color gamut, high brightness, a compact size, thinness, and energy efficiency. Consequently, major manufacturers worldwide are rushing to invest in Micro LED technology research and development.

[0003] Color gamut is a term used to describe the range of colors visible to the human eye on a display. For example, all colors found in nature can be described by a display. A larger (wider) color gamut allows viewers to see more colors. Furthermore, the eye is highly sensitive to light brightness. If the light emitted by a display is highly efficient for human vision, it can achieve the desired efficiency without requiring a high current input, thus saving energy. Summary of the Invention

[0004] The present invention aims to provide a dual-mode micro-LED display device, which can select a display mode with a wider color gamut and higher color saturation, or a display mode with higher visual efficiency and lower power consumption according to needs.

[0005] To achieve the above objectives, a micro-LED display device according to the present invention includes a display panel, a driving unit, and a control unit. The display panel includes a plurality of pixel units, each of which includes a first display pixel and a second display pixel. The first display pixel includes a first sub-pixel, a second sub-pixel, and a third sub-pixel, and the second display pixel includes a fourth sub-pixel, a fifth sub-pixel, and a sixth sub-pixel. The peak wavelength of the first sub-pixel is greater than the peak wavelength of the second sub-pixel, the peak wavelength of the second sub-pixel is greater than the peak wavelength of the third sub-pixel, the peak wavelength of the fourth sub-pixel is greater than the peak wavelength of the fifth sub-pixel, and the peak wavelength of the fifth sub-pixel is greater than the peak wavelength of the sixth sub-pixel. The peak wavelength of the fourth sub-pixel is less than the peak wavelength of the first sub-pixel, and the peak wavelength of the fifth sub-pixel is greater than the peak wavelength of the second sub-pixel. Under the same radiance, the brightness of the second display pixel is greater than the brightness of the first display pixel, and the color gamut range of the first display pixel is greater than the color gamut range of the second display pixel. The driving unit is electrically connected to the pixel units. The control unit is electrically connected to the driving unit and controls the driving unit to selectively drive the first display pixels or the second display pixels of the pixel units.

[0006] In the micro-LED display device of the present invention, each pixel unit includes a first display pixel and a second display pixel. The first display pixel includes a first sub-pixel, a second sub-pixel, and a third sub-pixel, and the second display pixel includes a fourth sub-pixel, a fifth sub-pixel, and a sixth sub-pixel. The peak wavelength of the first sub-pixel is greater than the peak wavelength of the second sub-pixel, the peak wavelength of the second sub-pixel is greater than the peak wavelength of the third sub-pixel, the peak wavelength of the fourth sub-pixel is greater than the peak wavelength of the fifth sub-pixel, and the peak wavelength of the fifth sub-pixel is greater than the peak wavelength of the sixth sub-pixel. The peak wavelength of the fourth sub-pixel is less than the peak wavelength of the first sub-pixel, and the peak wavelength of the fifth sub-pixel is greater than the peak wavelength of the second sub-pixel. Therefore, under the same radiance, the brightness of the second display pixel is greater than the brightness of the first display pixel, and the color gamut range of the first display pixel is greater than the color gamut range of the second display pixel. In addition, the control unit can control the driving unit to selectively drive the first display pixels or the second display pixels of the pixel units to emit light to display an image. Thus, compared to existing micro-LED display devices that can only display images in one display mode, the micro-LED display device of the present invention is a dual-mode micro-LED display device. According to needs, the first display pixel with a wider color gamut and higher color saturation can be selected to display images, or the second display pixel with higher visual efficiency and lower power consumption can be selected to display images. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1A FIG. 1 is a schematic diagram of a micro light emitting diode display device according to an embodiment of the present invention.

[0008] Figure 1B for Figure 1A A schematic diagram of the configuration of pixel units of a display panel in a micro light emitting diode display device.

[0009] Figure 2A for Figure 1B A schematic diagram of the configuration of pixel units in a display panel according to an embodiment.

[0010] Figure 2B for Figure 2A The color coordinate map of the pixel unit.

[0011] Figure 3A for Figure 1B A schematic diagram of the configuration of pixel units in a display panel according to another embodiment.

[0012] Figure 3B for Figure 3A The color coordinate map of the pixel unit.

[0013] Figures 4A to 4F They are Figure 1B Schematic diagram of the configuration of pixel units in different embodiments in a display panel. DETAILED DESCRIPTION

[0014] A micro light emitting diode display device according to an embodiment of the present invention will be described below with reference to the accompanying drawings, wherein the same elements will be represented by the same reference symbols.

[0015] The micro LED / μLED display device in the following embodiments may be an active matrix display device or a passive matrix display device, without limitation.

[0016] Figure 1A is a schematic diagram of a micro light emitting diode display device according to an embodiment of the present invention, Figure 1B for Figure 1A A schematic diagram of the configuration of pixel units of a display panel in a micro light emitting diode display device is shown. Figure 2A for Figure 1B In a display panel, a schematic diagram of the configuration of a pixel unit of an embodiment is shown. Figure 2B for Figure 2A The color coordinate map of the pixel unit.

[0017] Please refer to Figure 1A and Figure 1B The micro light emitting diode display device 1 of this embodiment includes a display panel 11 , a driving unit 12 and a control unit 13 .

[0018] The display panel 11 is a micro light emitting diode display panel, which includes a plurality of pixel units P ( Figure 1A As an example, only one pixel unit P is shown. The pixel units P are arranged in a matrix consisting of rows and columns, but the arrangement is not limited thereto. Based on the circuit configuration of the display device or user requirements, a PenTile, Pearl, or Honeycomb arrangement may also be employed. Each pixel unit P includes a first display pixel P1 and a second display pixel P2.

[0019] The first display pixel P1 includes a first subpixel R1, a second subpixel G1, and a third subpixel B1. When the first display pixel P1 emits light, the peak wavelength (Wp) of the first subpixel R1 is greater than the peak wavelength of the second subpixel G1 (peak wavelength relationship: λ(R1) > λ(G1)). The peak wavelength of the second subpixel G1 is greater than the peak wavelength of the third subpixel B1 (peak wavelength relationship: λ(G1) > λ(B1)).

[0020] Furthermore, the second display pixel P2 includes a fourth subpixel R2, a fifth subpixel G2, and a sixth subpixel B2. When the second display pixel P2 emits light, the peak wavelength of the fourth subpixel R2 is greater than the peak wavelength of the fifth subpixel G2 (peak wavelength relationship: λ(R2)>λ(G2)), and the peak wavelength of the fifth subpixel G2 is greater than the peak wavelength of the sixth subpixel B2 (peak wavelength relationship: λ(G2)>λ(B2)).

[0021] In addition, the peak wavelength of the fourth subpixel R2 is smaller than the peak wavelength of the first subpixel R1 (peak wavelength relationship: λ(R2)<λ(R1)), and the peak wavelength of the fifth subpixel G2 is larger than the peak wavelength of the second subpixel G1 (peak wavelength relationship: λ(G2)>λ(G1)).

[0022] In this embodiment, the first and fourth sub-pixels R1 and R2 are red sub-pixels, but the peak wavelength of the fourth sub-pixel R2 is smaller than that of the first sub-pixel R1. Specifically, the peak wavelength of the fourth sub-pixel R2 is closer to the peak wavelength of the luminance efficiency function (e.g., 555 nm) than the peak wavelength of the first sub-pixel R1. Furthermore, the second and fifth sub-pixels G1 and G2 are green sub-pixels, but the peak wavelength of the fifth sub-pixel G2 is larger than that of the second sub-pixel G1. Specifically, the peak wavelength of the fifth sub-pixel G2 is closer to the peak wavelength of the luminance efficiency function (e.g., 555 nm) than the peak wavelength of the second sub-pixel G1. Furthermore, the third and sixth sub-pixels B1 and B2 are blue sub-pixels, and both have the same peak wavelength.

[0023] When the display panel 11 displays at full grayscale (full brightness, for example, L255), the first display pixel P1 and the second display pixel P2 of each pixel unit P have the same color point, that is, the same white point color coordinates or the same color temperature. Due to the relative peak wavelengths of the sub-pixels (R1, G1, B1, R2, G2, B2) of the first display pixel P1 and the second display pixel P2 of each pixel unit P, as well as the fact that the peak wavelength of the fourth sub-pixel R2 is shorter than the peak wavelength of the first sub-pixel R1 and the peak wavelength of the fifth sub-pixel G2 is longer than the peak wavelength of the second sub-pixel G1, the luminance of the second display pixel P2 can be greater than that of the first display pixel P1 under the same radiance conditions, and the color gamut range of the first display pixel P1 can be greater than that of the second display pixel P2. Radiance, as mentioned above, is the radiant flux per unit solid angle in a specified direction and per unit area perpendicular to that direction. Radiant flux is generally measured in watts. Luminance, on the other hand, is the luminous flux per unit solid angle in a specified direction and per unit area perpendicular to that direction. Luminous flux is generally measured in lumens. Lumens are converted to radiant flux by multiplying the product of each wavelength by a visual effect function.

[0024] The driving unit 12 is electrically connected to the pixel units P, and is used to drive the pixel units P to emit light to display an image. In one embodiment, the driving unit 12 may include a scan driving circuit and a data driving circuit (not shown). The scan driving circuit may be electrically connected to the pixel units P via a plurality of scan lines (not shown), and the data driving circuit may be electrically connected to the pixel units P via a plurality of data lines (not shown). When the scan driving circuit sequentially outputs scan signals to cause the scan lines to sequentially turn on each column of pixel units P, the data driving circuit may transmit data signals corresponding to each column of pixel units P to the pixel units P via the data lines, thereby driving or lighting up the pixel units P to emit light, thereby displaying an image.

[0025] The control unit 13 is electrically connected to the driving unit 12. The control unit 13 can output a control signal to control the driving unit 12 to selectively drive the first display pixels P1 or the second display pixels P2 in the pixel units P, thereby causing the first display pixels P1 or the second display pixels P2 in the pixel units P to emit light to display an image. In one embodiment, the control unit 13 can be implemented in software, hardware, or firmware.

[0026] Please refer to Figure 2AAs shown, the first sub-pixel R1 of this embodiment includes a red micro-LED R11, and the fourth sub-pixel R2 includes another red micro-LED R21 with a different wavelength from the first sub-pixel R1. In one embodiment, the peak wavelength of the first sub-pixel R1 can be, for example, 629nm, and the peak wavelength of the fourth sub-pixel R2 can be, for example, 587nm. Figure 2B As shown, in the CIE 1931 color coordinates, the x coordinate value of the first sub-pixel R1 is greater than the x coordinate value of the fourth sub-pixel R2 (x coordinate relationship: R1>R2), and the y coordinate value of the first sub-pixel R1 is less than the y coordinate value of the fourth sub-pixel R2 (y coordinate relationship: R1>R2). <R2)。在此,第一子像素R1可为深红色,第四子像素R2可为淡红色。在一实施例中,第一子像素R1的峰值波长与第四子像素R2的峰值波长的差例如可大于40纳米(nm)。在一实施例中,第一子像素R1的峰值波长为640nm,第四子像素R2的峰值波长为600nm。

[0027] Please refer to Figure 2A In this embodiment, the second sub-pixel G1 includes a green micro-LED G11, and the fifth sub-pixel G2 includes another green micro-LED G21 with a different wavelength from the second sub-pixel G1. In one embodiment, the peak wavelength of the second sub-pixel G1 can be, for example, 539nm, and the peak wavelength of the fifth sub-pixel G2 can be, for example, 557nm. In addition, Figure 2B As shown, in the CIE 1931 color coordinates, the x coordinate value of the second sub-pixel G1 is smaller than the x coordinate value of the fifth sub-pixel G2 (x coordinate relationship: G1<G2),第二子像素G1的y座标值大于第五子像素G2的y座标值(y座标关系:G1> G2). Here, the second subpixel G1 may be dark green, and the fifth subpixel G2 may be light green. In one embodiment, the difference between the peak wavelength of the fifth subpixel G2 and the peak wavelength of the second subpixel G1 may be greater than 10 nm. In one embodiment, the peak wavelength of the fifth subpixel G2 is 530 nm, and the peak wavelength of the second subpixel G1 is 545 nm.

[0028] In addition, please refer to Figure 2A In this embodiment, the third sub-pixel B1 and the sixth sub-pixel B2 are blue sub-pixels, and each includes a blue micro-LED B11 with the same peak wavelength (emission wavelength). In different embodiments, the wavelengths of the blue micro-LEDs in the third sub-pixel B1 and the sixth sub-pixel B2 can be selectively selected and configured differently, as will be explained below.

[0029] It is particularly noted that the difference between the peak wavelength of the fourth sub-pixel R2 and the peak wavelength of the fifth sub-pixel G2 must be greater than 25 nanometers and less than 35 nanometers in order to maintain a certain level of color gamut performance. If the peak wavelength of the fourth sub-pixel R2 is too close to the peak wavelength of the fifth sub-pixel G2, the red light and the green light will not be easily distinguished (tending to yellow light), which will adversely affect the performance of the color gamut. In an embodiment, when the target is greater than 60% of NTSC, the difference between the peak wavelength of the fourth sub-pixel R2 and the peak wavelength of the fifth sub-pixel G2 must be greater than 40 nanometers and less than 60 nanometers, and then the peak wavelength of the fourth sub-pixel R2 is preferably, for example, can be between 600 nm to 620 nm, and the peak wavelength of the fifth sub-pixel G2 is preferably, for example, can be between 540 nm to 550 nm.

[0030] As mentioned above, in the micro light emitting diode display device 1 of the present embodiment, each pixel unit P of the display panel 11 includes two types of display pixels (first display pixel P1 and second display pixel P2), the peak wavelength of the first sub-pixel R1 is greater than the peak wavelength of the second sub-pixel G1, and the peak wavelength of the second sub-pixel G1 is greater than the peak wavelength of the third sub-pixel B1; the peak wavelength of the fourth sub-pixel R2 is greater than the peak wavelength of the fifth sub-pixel G2, and the peak wavelength of the fifth sub-pixel G2 is greater than the peak wavelength of the sixth sub-pixel B2. In addition, the peak wavelength of the fourth sub-pixel R2 is less than the peak wavelength of the first sub-pixel R1, and the peak wavelength of the fifth sub-pixel G2 is greater than the peak wavelength of the second sub-pixel G1, so that the brightness of the second display pixel P2 is greater than the brightness of the first display pixel P1 under the same radiation rate, and the color gamut range of the first display pixel P1 is greater than the color gamut range of the second display pixel P2.

[0031] In addition, the control unit 13 can issue a control signal to control the driving unit 12 to drive only the first display pixels P1 (i.e. sub-pixels R1, G1, B1) to emit light to display images at one time, but at another time, the control unit 13 controls the driving unit 12 to switch the display mode, so that the driving unit 12 only drives the second display pixels P2 (i.e. sub-pixels R2, G2, B2) to emit light to display images. Thus, compared with the existing micro light emitting diode display device which can only display images in one display mode, the micro light emitting diode display device 1 of the present embodiment is a dual-mode display micro light emitting diode display device, which can select to drive the first display pixel P1 with wider color gamut and higher color saturation to display images, or select to drive the second display pixel P2 with higher visual efficiency and lower power consumption to display images according to the use requirements.

[0032] Figure 3A For Figure 1B the configuration diagram of the pixel unit of another embodiment in the display panel, and Figure 3B for Figure 3A The color coordinate map of the pixel unit.

[0033] like Figure 3A As shown, the pixel unit Pa of this embodiment is Figure 2A The pixel unit P is roughly the same as Figure 2A The main difference is that the peak wavelength of the sixth sub-pixel B2 of the pixel unit Pa of this embodiment is greater than the peak wavelength of the third sub-pixel B1 (peak wavelength relationship: λ(B2)>λ(B1)). That is, the peak wavelength of the sixth sub-pixel B2 is closer to the peak wavelength of the visual effect function (e.g., 555nm) than the peak wavelength of the third sub-pixel B1. Here, the third sub-pixel B1 includes a blue micro-LED B11, and the sixth sub-pixel B2 includes another blue micro-LED B21 with a different wavelength from the third sub-pixel B1.

[0034] In addition, if Figure 3B As shown, in the CIE 1931 color coordinates, the x-coordinate value of the third sub-pixel B1 is greater than the x-coordinate value of the sixth sub-pixel B2 (x-coordinate relationship: B1>B2), and the y-coordinate value of the third sub-pixel B1 is less than the y-coordinate value of the sixth sub-pixel B2 (y-coordinate relationship: B1>B2). <B2)。在此,第三子像素B1可为深蓝色,第六子像素B2可为淡蓝色。在一实施例中,第六子像素B2的峰值波长与第三子像素B1的峰值波长的差例如可大于或等于10nm。在一实施例中,第三子像素B1的峰值波长例如可为460nm,第六子像素B2的峰值波长例如可为476nm。在一实施例中,第三子像素B1的峰值波长例如可为450nm,第六子像素B2的峰值波长例如可为460nm。

[0035] In addition, the wavelength relationship between the first sub-pixel R1 and the second sub-pixel G1 of the first display pixel P1 and the fourth sub-pixel R2 and the fifth sub-pixel G2 of the second display pixel P2 is still the same as Figure 2A The pixel units P are the same.

[0036] Figures 4A to 4F They are Figure 1B Schematic diagram of the configuration of pixel units in different embodiments in a display panel.

[0037] like Figure 4A As shown, the pixel unit Pb of this embodiment is Figure 2A The pixel unit P is roughly the same as Figure 2AThe main difference is that in the pixel unit Pb of this embodiment, the emission wavelength of the blue micro-LEDs B11 in the second display pixel P is equal to the emission wavelength of the blue micro-LEDs B11 in the first display pixel P1. In other words, the first sub-pixel R1, the second sub-pixel G1, the third sub-pixel B1, the fourth sub-pixel R2, the fifth sub-pixel G2, and the sixth sub-pixel B2 each include a blue micro-LED B11, and the emission wavelengths of these blue micro-LEDs B11 are the same. Furthermore, the first sub-pixel R1 also includes a red light-converting material R12, and the fourth sub-pixel R2 also includes another red light-converting material R22 with a different emission wavelength from the first sub-pixel R1. The second sub-pixel G1 also includes a green light-converting material G12, and the fifth sub-pixel G2 also includes another green light-converting material G22 with a different emission wavelength from the second sub-pixel G1. Here, the emission wavelengths of the color-converting materials are related by: λ(R2) < λ(R1), and λ(G2) > λ(G1). In one embodiment, these color conversion materials (R12, R22, G12, G12) may be quantum dots (QD) or phosphors, without limitation.

[0038] In addition, if Figure 4B As shown, Figure 4A The main difference between the pixel unit Pb of this embodiment is that, in the pixel unit Pc of this embodiment, the blue micro-LEDs B21 configured in the second display pixel P2 have a longer emission wavelength than the blue micro-LEDs B11 configured in the first display pixel P1. In other words, the first sub-pixel R1, the second sub-pixel G1, and the third sub-pixel B1 of the first display pixel P1 also include a blue micro-LED B11, but the fourth sub-pixel R2, the fifth sub-pixel G2, and the sixth sub-pixel B2 of the second display pixel P2 also include another blue micro-LED B21. In other words, the sub-pixels of the first display pixel P1 and the second display pixel P2 are each equipped with blue micro-LEDs of different emission wavelengths: B11 and B21, and the emission wavelength relationship is:

[0039] λ(B2)>λ(B1).

[0040] In addition, if Figure 4C As shown, Figure 4AThe main difference between the pixel unit Pb and the pixel unit Pd of this embodiment is that, in the pixel unit Pd of this embodiment, the first sub-pixel R1 of the first display pixel P1 includes a red light color conversion material R12, the second sub-pixel G1 includes a green light micro-LED G11, the fourth sub-pixel R2 of the second display pixel P2 also includes another red light color conversion material R22 with a different emission wavelength from the first sub-pixel R1, and the fifth sub-pixel G2 includes another green light micro-LED G21, and the green light micro-LED G11 and the green light micro-LED G21 have different emission wavelengths. Here, the emission wavelength relationship is: λ(G2)>λ(G1). Therefore, compared with Figure 4A The main difference between the pixel units Pb is that the first sub-pixel R1 and the fourth sub-pixel R2 that emit red light use a blue micro-LED B11 to excite a red light color conversion material, resulting in better luminous efficiency. Meanwhile, the second sub-pixel G1 and the fifth sub-pixel G2 that emit green light maintain the configuration of the green micro-LED G11 and the green micro-LED G21 instead of using a green light color conversion material, thus avoiding energy loss in an additional color conversion process.

[0041] It is understood that in different embodiments (not shown), the wavelengths of the blue light micro-LEDs of the third sub-pixel B1 and the sixth sub-pixel B2 can be selectively selected and configured differently, so that the wavelength of the blue light micro-LED of the sixth sub-pixel B2 is greater than the wavelength of the blue light micro-LED of the third sub-pixel B1 (e.g. Figure 3A ).

[0042] In addition, if Figure 4D As shown, Figure 2A The main difference between the pixel unit P of this embodiment and the pixel unit Pe is that, in the pixel unit Pe of this embodiment, the first sub-pixel R1, the second sub-pixel G1, the third sub-pixel B1, and the sixth sub-pixel B2 each include a blue micro-LED B11, and these blue micro-LEDs B11 have the same emission wavelength. Furthermore, the first sub-pixel R1 also includes a red light-converting material R12, and the second sub-pixel G1 also includes a green light-converting material G12. In other words, the first sub-pixel R1 in the first display pixel P1 comprises a blue micro-LED B11 and a red light-converting material R12, while the second sub-pixel G1 comprises a blue micro-LED B11 and a green light-converting material G12 of the same wavelength. Furthermore, the fourth sub-pixel R2 and the fifth sub-pixel G2 in the second display pixel P2 comprise a red micro-LED R21 and a green micro-LED G21, respectively.

[0043] It is understood that in different embodiments (not shown), the wavelengths of the blue light micro-LEDs of the third sub-pixel B1 and the sixth sub-pixel B2 can be selectively selected and configured differently, so that the wavelength of the blue light micro-LED of the sixth sub-pixel B2 is greater than the wavelength of the blue light micro-LED of the third sub-pixel B1 (e.g. Figure 3A ).

[0044] In addition, if Figure 4E As shown, Figure 2A The main difference between the pixel unit P and the pixel unit Pf of this embodiment is that in the pixel unit Pf of this embodiment, the third sub-pixel B1, the fourth sub-pixel R2, the fifth sub-pixel G2, and the sixth sub-pixel B2 each include a blue micro-LED B11. These blue micro-LEDs B11 have the same emission wavelength. The fourth sub-pixel R2 also includes a red light color conversion material R22, and the fifth sub-pixel G2 also includes a green light color conversion material G22. Here, the emission wavelengths of the color conversion materials are in the relationship: λ(R2) < λ(R1), and λ(G2) > λ(G1).

[0045] It is understood that in different embodiments (not shown), the wavelengths of the blue light micro-LEDs of the third sub-pixel B1 and the sixth sub-pixel B2 can be selectively selected and configured differently, so that the wavelength of the blue light micro-LED of the sixth sub-pixel B2 is greater than the wavelength of the blue light micro-LED of the third sub-pixel B1 (e.g. Figure 3A ).

[0046] The aforementioned configurations of micro-LEDs and color conversion materials can be used in various combinations. For example, all sub-pixels in a pixel unit can use blue micro-LEDs B11 emitting light at the same wavelength, while the first sub-pixel R1 also includes a red color conversion material R12, and the fifth sub-pixel G2 also includes a green color conversion material G22. Alternatively, the second sub-pixel G1 also includes a green color conversion material G12, and the fourth sub-pixel R2 also includes a red color conversion material R22. The present invention is not limited to these combinations.

[0047] Furthermore, in different embodiments, each sub-pixel in the pixel unit may be mixed to emit white light, and then equipped with red, green, and blue color filters to generate red, green, and blue light.

[0048] For example Figure 4FAs shown, each sub-pixel in the pixel unit Pg of this embodiment (the first sub-pixel R1, the second sub-pixel G1, the third sub-pixel B1, the fourth sub-pixel R2, the fifth sub-pixel G2, and the sixth sub-pixel B2) includes a blue micro-LED B11, red light-converting materials (R12, R22), and green light-converting materials (G12, G22). The blue micro-LEDs B11 have the same emission wavelength, while the first sub-pixel R1, the second sub-pixel G1, and the third sub-pixel B1 each include a red light-converting material R12. The fourth sub-pixel R2, the fifth sub-pixel G2, and the sixth sub-pixel B2 each include another red light-converting material R22. Furthermore, the first sub-pixel R1, the second sub-pixel G1, and the third sub-pixel B1 each include a green light-converting material G12, and the fourth sub-pixel R2, the fifth sub-pixel G2, and the sixth sub-pixel B2 each include another green light-converting material G22. The emission wavelengths of the red light conversion materials R22 disposed in the second display pixel P2 are shorter than the emission wavelengths of the red light conversion materials R12 disposed in the first display pixel P1 (i.e., the wavelength relationship of the red light conversion materials is: λ(R2)<λ(R1)), and the emission wavelengths of the green light conversion materials G22 disposed in the second display pixel P2 are longer than the emission wavelengths of the green light conversion materials G12 disposed in the first display pixel P1 (i.e., the wavelength relationship of the green light conversion materials is: λ(G2)>λ(G1)).

[0049] Therefore, each sub-pixel (R1, G1, B1) in the first display pixel P1 includes a blue micro-LED B11 emitting light at the same wavelength, which, in combination with the red and green color conversion materials R12 and G12, can emit white light. Each sub-pixel (R2, G2, B2) in the second display pixel P2 includes a blue micro-LED B11 emitting light at the same wavelength, which, in combination with the red and green color conversion materials R22 and G22, can emit white light. Therefore, when the first display pixel P1 and the second display pixel P2 have the same radiance, the brightness of the second display pixel P2 is greater than that of the first display pixel P1.

[0050] Furthermore, the first and fourth sub-pixels R1 and R2 of pixel unit Pg each include a red filter R13, the second and fifth sub-pixels G1 and G2 each include a green filter G13, and the third and sixth sub-pixels B1 and B2 each include a blue filter B13. Through the red, green, and blue filters R13, these sub-pixels that emit white light can correspondingly generate red, green, and blue light. The color gamut of the first display pixel P1 is larger than that of the second display pixel P2.

[0051] Furthermore, it is understood that in different embodiments (not shown), the wavelengths of the blue micro-LEDs in the first display pixel P1 and the second display pixel P2 can be selectively selected and configured differently, so that the wavelength of the blue micro-LEDs in the second display pixel P2 is greater than the wavelength of the blue micro-LEDs in the first display pixel P1 (e.g., Figure 3A ).

[0052] In one embodiment, the micro-LED display device of the present invention can be used in a reading mode, such as displaying text. When displaying content, such as black text on a white background, there is no requirement for color gamut performance. The control unit controls the driving unit to drive the second display pixels to display the image, thereby achieving power conservation during extended viewing or reading. In one embodiment, the control unit can control the driving unit to selectively drive the first display pixels of the pixel units to display color images, or to drive the second display pixels to display black and white images.

[0053] In summary, in the micro-LED display device of the present invention, each pixel unit includes a first display pixel and a second display pixel. The first display pixel includes a first sub-pixel, a second sub-pixel, and a third sub-pixel, and the second display pixel includes a fourth sub-pixel, a fifth sub-pixel, and a sixth sub-pixel. The peak wavelength of the first sub-pixel is greater than the peak wavelength of the second sub-pixel, the peak wavelength of the second sub-pixel is greater than the peak wavelength of the third sub-pixel, the peak wavelength of the fourth sub-pixel is greater than the peak wavelength of the fifth sub-pixel, and the peak wavelength of the fifth sub-pixel is greater than the peak wavelength of the sixth sub-pixel. The peak wavelength of the fourth sub-pixel is less than the peak wavelength of the first sub-pixel, and the peak wavelength of the fifth sub-pixel is greater than the peak wavelength of the second sub-pixel. Therefore, under the same radiance, the brightness of the second display pixel is greater than the brightness of the first display pixel, and the color gamut range of the first display pixel is greater than the color gamut range of the second display pixel. In addition, the control unit can control the driving unit to selectively drive the first display pixels or the second display pixels of the pixel units to emit light to display an image. Thus, compared to existing micro-LED display devices that can only display images in one display mode, the micro-LED display device of the present invention is a dual-mode micro-LED display device. According to needs, the first display pixel with a wider color gamut and higher color saturation can be selected to display images, or the second display pixel with higher visual efficiency and lower power consumption can be selected to display images.

[0054] The above description is for illustrative purposes only and is not intended to be limiting. Any equivalent modifications or variations that do not depart from the spirit and scope of the present invention should be included in the appended claims.

Claims

1. A micro light emitting diode display device comprising: A display panel includes a plurality of pixel units, each of the pixel units includes a first display pixel and a second display pixel, the first display pixel includes a first sub-pixel, a second sub-pixel, and a third sub-pixel, the second display pixel includes a fourth sub-pixel, a fifth sub-pixel, and a sixth sub-pixel, the peak wavelength of the first sub-pixel is greater than the peak wavelength of the second sub-pixel, the peak wavelength of the second sub-pixel is greater than the peak wavelength of the third sub-pixel, the peak wavelength of the fourth sub-pixel is greater than the peak wavelength of the fifth sub-pixel, and the peak wavelength of the fifth sub-pixel is greater than the peak wavelength of the sixth sub-pixel; wherein the peak wavelength of the fourth sub-pixel is less than the peak wavelength of the first sub-pixel, and the peak wavelength of the fifth sub-pixel is greater than the peak wavelength of the second sub-pixel, so that under the same radiance, the brightness of the second display pixel is greater than the brightness of the first display pixel, and the color gamut range of the first display pixel is greater than the color gamut range of the second display pixel; a driving unit, electrically connected to the plurality of pixel units; as well as a control unit electrically connected to the driving unit, wherein the control unit controls the driving unit to selectively drive the first display pixel or the second display pixel of the plurality of pixel units; When the display panel displays in full grayscale, the first display pixel and the second display pixel of each pixel unit have the same color point.

2. The micro-LED display device of claim 1 , wherein in CIE 1931 color coordinates, the x-coordinate value of the first sub-pixel is greater than the x-coordinate value of the fourth sub-pixel, and the y-coordinate value of the first sub-pixel is less than the y-coordinate value of the fourth sub-pixel.

3. The micro-LED display device of claim 1 , wherein in CIE 1931 color coordinates, the x-coordinate value of the second sub-pixel is smaller than the x-coordinate value of the fifth sub-pixel, and the y-coordinate value of the second sub-pixel is larger than the y-coordinate value of the fifth sub-pixel.

4. The micro-LED display device as claimed in claim 1, wherein a difference between a peak wavelength of the first sub-pixel and a peak wavelength of the fourth sub-pixel is greater than 40 nanometers, and a difference between a peak wavelength of the fifth sub-pixel and a peak wavelength of the second sub-pixel is greater than 10 nanometers. 5 . The micro light emitting diode display device as claimed in claim 1 , wherein a difference between a peak wavelength of the fourth sub-pixel and a peak wavelength of the fifth sub-pixel is greater than 25 nanometers and less than 35 nanometers.

6. The micro-LED display device as claimed in claim 1, wherein the first sub-pixel comprises a red micro-LED, the fourth sub-pixel comprises another red micro-LED; the second sub-pixel comprises a green micro-LED, and the fifth sub-pixel comprises another green micro-LED. 7 . The micro light emitting diode display device as claimed in claim 1 , wherein a peak wavelength of the sixth sub-pixel is greater than a peak wavelength of the third sub-pixel. 8 . The micro light emitting diode display device according to claim 7 , wherein a difference between a peak wavelength of the sixth sub-pixel and a peak wavelength of the third sub-pixel is greater than or equal to 10 nanometers.

9. The micro-LED display device of claim 7, wherein in CIE 1931 color coordinates, an x-coordinate value of the third sub-pixel is greater than an x-coordinate value of the sixth sub-pixel, and a y-coordinate value of the third sub-pixel is less than a y-coordinate value of the sixth sub-pixel.

10. The micro-LED display device as claimed in claim 7, wherein the third sub-pixel comprises a blue micro-LED, and the sixth sub-pixel comprises another blue micro-LED.

11. The micro-LED display device of claim 1 , wherein the first sub-pixel comprises a red light-converting material, the fourth sub-pixel comprises another red light-converting material, the second sub-pixel comprises a green light-converting material, and the fifth sub-pixel comprises another green light-converting material.

12. The micro-LED display device according to claim 11 , wherein the first sub-pixel, the second sub-pixel, and the third sub-pixel further include a blue micro-LED, and the fourth sub-pixel, the fifth sub-pixel, and the sixth sub-pixel further include another blue micro-LED, and the light emission wavelength of the plurality of blue micro-LEDs arranged in the second display pixel is greater than or equal to the light emission wavelength of the plurality of blue micro-LEDs arranged in the first display pixel.

13. The micro-LED display device according to claim 1 , wherein the first sub-pixel, the third sub-pixel, the fourth sub-pixel, and the sixth sub-pixel each include a blue micro-LED, and the plurality of blue micro-LEDs have the same emission wavelength; the first sub-pixel further includes a red light-conversion material, the fourth sub-pixel further includes another red light-conversion material; and the second sub-pixel and the fifth sub-pixel each include a green micro-LED, and the plurality of green micro-LEDs have different emission wavelengths.

14. The micro-LED display device of claim 1 , wherein the first sub-pixel, the second sub-pixel, the third sub-pixel, the fourth sub-pixel, the fifth sub-pixel, and the sixth sub-pixel respectively comprise a blue micro-LED, a red light-converting material, and a green light-converting material; the plurality of blue micro-LEDs have the same emission wavelength; the plurality of red light-converting materials disposed in the second display pixel have an emission wavelength shorter than the plurality of red light-converting materials disposed in the first display pixel; and the plurality of green light-converting materials disposed in the second display pixel have an emission wavelength longer than the plurality of green light-converting materials disposed in the first display pixel.

15. The micro-LED display device as claimed in claim 14, wherein the first sub-pixel and the fourth sub-pixel further include a red filter respectively, the second sub-pixel and the fifth sub-pixel further include a green filter respectively, and the third sub-pixel and the sixth sub-pixel further include a blue filter respectively.

16. The micro light emitting diode display device according to claim 1, wherein the control unit controls the driving unit to selectively drive the first display pixels of the plurality of pixel units to display color images, or drive the second display pixels of the plurality of pixel units to display black and white images.

Images