TW201419513A - Electroluminescent display panel - Google Patents

Abstract

An electroluminescent display panel includes a plurality of electroluminescent devices and a color filter pattern. The electroluminescent devices are used to provide white light. The color filter pattern includes a red color filter, a green color filter and a blue color filter. The peak of spectrum of the red color filter is between 720 nanometers (nm) and 780 nm, and the intensity of the red color filter is between 0.95 and 1. The peak of spectrum of the green color filter is between 453 ± 2 nm, and the intensity of the green color filter is between 0.88 and 0.9. The peak of spectrum of the blue color filter is between 537 ± 2 nm, and the intensity of the blue color filter is between 0.74 and 0.76.

Description

Electroluminescent display panel

The invention relates to an electroluminescent display panel, in particular to an electroluminescent display panel capable of reducing white point offset.

Electroluminescent display panels (such as organic light-emitting diode display panels) are expected to become mainstream products of a new generation of flat display panels due to their advantages of active illumination, high contrast, thin thickness and wide viewing angle. However, the spectrum of the light emitted by the white organic electroluminescent device (WOLED) used in the electroluminescent display panel is shifted with the driving voltage, so that the image displayed by the electroluminescent display panel is easy to generate. White point offset problem. The white point offset causes the color of the displayed picture to be different from the ideal color, for example, the picture is yellowish, thus causing limitations in the application of the white organic electroluminescent display panel.

One of the objects of the present invention is to provide an electroluminescent display panel to solve the white point shift problem.

An embodiment of the invention provides an electroluminescent display panel having a pixel unit. The pixel unit includes a red sub-pixel, a green sub-pixel and a blue sub-pixel, respectively located in a red sub-pixel region, a green sub-pixel region and a blue sub-pixel region. The red sub-pixel area, the green sub-pixel area and the blue sub-pixel area respectively comprise a penetrating area. The electroluminescent display panel includes a plurality of electroluminescent elements and a color filter pattern. The electroluminescent elements are respectively located in the red sub-pixel region, the green sub-pixel region and the blue sub-pixel region, respectively for providing a white light. The color filter pattern includes a red filter layer, a green filter layer and a blue filter layer. The red filter layer is located in the red sub-pixel region, and is used to convert white light into a red light after penetrating the red filter layer, wherein a peak of the spectrum of one of the red filter layers is between 720 nm and 780 nm. Between meters, and their relative strength is between 0.95 and 1. The green filter layer is located in the green sub-pixel region, and the white light is converted into a green light after penetrating the green filter layer, wherein a peak of the spectrum of one of the green filter layers is 537±2 nm, and Its relative strength is between 0.88 and 0.9. The blue filter layer is located in the blue sub-pixel region, and is used to convert white light into a blue light after penetrating the blue filter layer, wherein a peak of one spectrum of the blue filter layer is 453±2 Meters, and their relative strength is between 0.74 and 0.76.

The present invention will be further understood by those of ordinary skill in the art of the invention.

Please refer to Figure 1. FIG. 1 is a schematic view showing an electroluminescent display panel according to a first embodiment of the present invention. As shown in FIG. 1 , the electroluminescent display panel 10 of the present embodiment has a plurality of pixel units 22 (only a single pixel unit 22 is illustrated as an example), and the pixel unit 22 includes a plurality of sub-pictures. Prime, such as red sub-pixel 22R, green sub-pixel 22G and blue sub-pixels 22B are located in the red sub-pixel area 12R, the green sub-pixel area 12G, and the blue sub-pixel area 12B, respectively. The red sub-pixel region 12R includes a penetrating region 12RT and an opaque region 12RN, the green sub-pixel region 12G includes a penetrating region 12GT and an opaque region 12GN, and the blue sub-pixel region 12B includes a penetrating region 12BT and The opaque region 12BN, wherein the penetrating region 12RT, the penetrating region 12GT and the penetrating region 12BT are regions through which light can be allowed to pass, and the opaque region 12RN, the opaque region 12GN and the opaque region 12BN are incapable of light. The area passed. In the present embodiment, the pixel unit 22 may be composed of, for example, a red sub-pixel 22R, a green sub-pixel 22G, and a blue sub-pixel 22B, that is, the pixel unit 22 does not include sub-pixels of other colors. It is composed of only three sub-pixels of red sub-pixel 22R, green sub-pixel 22G and blue sub-pixel 22B, but not limited thereto. In other embodiments, the pixel unit 22 may also include sub-pixels of three or more colors. The electroluminescent display panel 10 includes a substrate 21, an electroluminescent element (such as a white organic light emitting diode element (WOLED)) 24, a color filter pattern 30, a transistor element such as a thin film transistor element T, and a storage capacitor (not shown) Show). The substrate 21 includes a transparent substrate such as a glass substrate or a plastic substrate. The thin film transistor element T, the storage capacitor (not shown), and the electroluminescent element 24 are respectively disposed in corresponding sub-pixel regions. Depending on the circuit architecture, each pixel may include, for example, two thin film transistor elements and at least one storage capacitor, that is, a 2T1C architecture, or two or more thin film transistor components and at least one storage capacitor, such as a 4T2C architecture, a 2T2C architecture, 5T1C architecture, 6T1C architecture or other architecture. The thin film transistor element T includes a top gate type transistor element or a bottom gate type transistor element, and the semiconductor layer material of the thin film transistor element T may include, for example, an amorphous semiconductor, a polycrystalline semiconductor, a microcrystalline semiconductor, a single crystal semiconductor, a naphthalene A sesame semiconductor, an organic semiconductor, a metal oxide semiconductor, or other suitable material, or a combination of the above. Electric stimulation The light emitting element 24 may mainly include a first electrode 241 (eg, an anode), a second electrode 242 (eg, a cathode), and a light emitting layer 243 disposed between the first electrode 241 and the second electrode 242. Additionally, electroluminescent element 24 can optionally include a protective layer 244 and a hole injection layer 245. The protective layer 244 is disposed between the first electrode 241 and the color filter pattern 30, and the protective layer 244 has a plurality of openings 244A, respectively partially exposing the corresponding thin film transistor element T, so that the first electrode 241 can correspond to The thin film transistor element T is electrically connected. The hole injection layer 245 may be disposed between the first electrode 241 and the light emitting layer 243 to improve the injection efficiency of the hole. In the present embodiment, the electroluminescent device 24 emits white light W toward the direction of the first electrode 241, so the first electrode 241 is a transparent electrode, such as an indium tin oxide (ITO) electrode or a thin metal electrode, and the second electrode 242 is preferably a reflective electrode such as a metal electrode, but is not limited thereto. The light emitting layer 243 can be driven by the first electrode 241 and the second electrode 242 to generate white light. The light emitting layer 243 may be a single film layer or a plurality of film layers, and the light emitting layer 243 may be a small molecule organic light emitting material, a high molecular organic light emitting material, an inorganic light emitting material, or other suitable materials, or a combination of at least two of the foregoing. . The electroluminescent element 24 may include other film layers such as a hole transport layer, an electron transport layer, an electron injection layer, and the like, depending on the luminous efficiency. The spectrum of the white light W provided by the electroluminescent element 24 has three peaks, and the white light W has white point color coordinates Wx and Wy, and is substantially 0.316<Wx<0.319, 0.33<Wy<0.36, but not limited thereto. . In addition, the electroluminescent display panel 10 may further include a polarizer 26 disposed on the surface of the substrate 21 to increase contrast.

The color filter pattern 30 is disposed between the first electrode 241 and the thin film transistor element T. The color filter pattern 30 includes a red filter layer 30R, a green filter layer 30G, and blue Color filter layer 30B. The red filter layer 30R is located in the red sub-pixel region 12R, so that the white light W provided by the electroluminescent device 24 is converted into red light R after penetrating the red filter layer 30R; the green filter layer 30G is located in the green color. In the pixel area 12G, the white light W provided by the electroluminescence element 24 is converted into green light G after penetrating the green filter layer 30G; and the blue filter layer 30B is located in the blue sub-pixel area 12B. The white light W provided by the electroluminescent device 24 is converted into blue light B after passing through the blue filter layer 30B. The red filter layer 30R covers at least the penetrating region 12RT of the red sub-pixel region 12R, the green filter layer 30G covers at least the penetrating region 12GT of the green sub-pixel region 12G, and the blue filter layer 30B covers at least blue times. The penetration area 12BT of the pixel area 12B.

In a variant embodiment, the electroluminescent element 24 can also emit light toward the second electrode 242. Therefore, the second electrode 242 can be a transparent electrode, such as an indium tin oxide electrode or a thin metal electrode, and the first electrode 241 is preferably It may be a reflective electrode such as a metal electrode, and the color filter pattern 30 is disposed on the second electrode 242 (not shown).

In the present embodiment, the material of the red filter layer 30R may include, for example, a pigment of the DPP (Diketo-pyrrolopyrrole type) (as shown in the following chemical structural formula (1)) and a lanthanide ( A mixture of pigments of Anthraquinone (as shown in the following chemical formula (2)), or a mixture of pigments of the above DPP type and Anthraquinone: for example:

The material of the red filter layer 30R is not limited to the above materials, but may be a material which may have a red filter effect. The composition ratio of the above DPP-based pigment and the Anthraquinone-based pigment can be adjusted depending on the desired red filter effect.

The material of the green filter layer 30G may include, for example, a halogen-halo-cyanine-based pigment (as shown in the following chemical structural formula (3)) and an azo-based (Azo-based) pigment (such as the following chemical) a mixture of the formula (4) or a mixture of the above Halogen-Phthalocyanine pigments and Azo pigments:

The material of the green filter layer 30G is not limited to the above materials, but may be any material having a green filter effect. The composition ratio of the above-mentioned Halogen-Phthalocyanine-based pigment and Azo-based pigment can be adjusted depending on the desired green filter effect.

The material of the blue filter layer 30B may include, for example, a pigment of Phthalocyanine (as shown in the following chemical formula (5)) and a pigment of a dioxazine system (such as the following chemical formula). a mixture of (6) shown, or a mixture of the above-mentioned Phthalocyanine pigments and Dioxazine pigments:

The material of the blue filter layer 30B is not limited to the above materials, but may be any material having a blue filter effect. The above pigments of Phthalocyanine and Dioxazine The composition ratio of the pigments of the system can be adjusted according to the desired blue filter effect.

Please refer to Figure 2 and refer to Figure 1 together. Fig. 2 is a view showing a spectrogram (a relationship between wavelength and relative intensity) of the red filter layer, the green filter layer and the blue filter layer of the present embodiment. As shown in Fig. 2, curve 1 shows that the highest peak of the spectrum of the red filter layer 30R is between 720 nm and 780 nm, and the relative intensity is generally between 0.95 and 1; 2 shows that the highest peak of the spectrum of the green filter layer 30G is substantially 537±2 nm, the relative intensity is generally between 0.88 and 0.9, and the half-height width of the spectrum of the green filter layer 30G is substantially The upper line is between 105 nm and 109 nm; and curve 3 shows that the highest peak of the spectrum of the blue filter layer 30B is substantially 453 ± 2 nm, and its relative intensity is generally between 0.74 and Between 0.76, the full width at half maximum of the spectrum of the blue filter layer 30B is generally between 95 nm and 105 nm.

Please refer to Figure 3 again and refer to Figure 1 together. FIG. 3 is a schematic view showing the configuration of the color filter layer of the embodiment. As shown in FIG. 3, in the present embodiment, the red sub-pixel area 12R, the green sub-pixel area 12G and the blue sub-pixel area 12B can be arranged in parallel, and the red filter layer 30R and the green filter layer are arranged. The 30G and blue filter layers 30B are respectively disposed in the red sub-pixel region 12R, the green sub-pixel region 12G, and the blue sub-pixel region 12B. For example, the red sub-pixel region 12R, the green sub-pixel region 12G, and the blue sub-pixel region 12B may be sequentially arranged in a row direction, but not limited thereto. For example, the arrangement order of the red sub-pixel area 12R, the green sub-pixel area 12G, and the blue sub-pixel area 12B may be arbitrarily changed depending on the design. In addition, the red sub-pixel region 12R, the green sub-pixel region 12G, and the blue sub-pixel region 12B may be sequentially arranged in a column direction. In addition, red The color sub-pixel region 12R, the green sub-pixel region 12G, and the blue sub-pixel region 12B may also be configured in other various manners, such as a delta configuration.

In the present embodiment, the red filter layer 30R located in the penetration region 12RT of the red sub-pixel region 12R, the green filter layer 30G located in the penetration region 12GT of the green sub-pixel region 12G, and the blue sub-pixel in the blue sub-pixel The area ratio of the blue filter layer 30B of the penetration region 12BT of the region 12B can be adjusted depending on the application to achieve the desired white point color coordinate specification. For example, when the electroluminescent display panel 10 is applied to a television (TV), in order to achieve the white point color coordinate specification (Wx, Wy) of the television picture = 0.28, 0.29, it is located in the red sub-pixel area 12R. The red filter layer 30R of the transmissive region 12RT, the green filter layer 30G of the penetrating region 12GT of the green sub-pixel region 12G, and the blue filter layer 30B of the penetrating region 12BT of the blue sub-pixel region 12B The area ratio is generally 0.94 to 0.98: 0.81 to 0.85: 1.19 to 1.23, for example, the red filter layer 30R located in the penetration region 12RT of the red sub-pixel region 12R, and the penetration region 12GT located in the green sub-pixel region 12G. The area of the green filter layer 30G and the blue filter layer 30B of the penetration region 12BT of the blue sub-pixel region 12B may preferably be 0.96:0.83:1.21, but not limited thereto. In addition, please refer to Table 1. Table 1 lists the white screens displayed by the electroluminescent display panel 10 at different driving voltages under the condition that the red filter layer 30R, the green filter layer 30G, and the blue filter layer 30B have the above-described area ratio. White dot color coordinates. It can be seen from Table 1 that when the driving voltage is substantially between 6.4 volts and 6.8 volts, the white point color coordinates of the white picture can approximate the white point color coordinate specifications (Wx, Wy) of the television picture = 0.28, 0.29. Therefore, when the electroluminescent display panel 10 is applied to a television set, the red filter layer 30R located in the penetration region 12RT of the red sub-pixel region 12R and the penetration region 12GT located in the green sub-pixel region 12G are The area ratio of the green filter layer 30G to the blue filter layer 30B of the penetration region 12BT of the blue sub-pixel region 12B is substantially 0.94 to 0.98: 0.81 to 0.85: 1.19 to 1.23, and the driving voltage is substantially integrated. Between 6.4 volts and 6.8 volts, but not limited to this.

In addition, when the electroluminescent display panel 10 is applied to a monitor, in order to achieve the white point color coordinate specification (Wx, Wy) of the monitor screen = 0.313, 0.329, the penetration in the red sub-pixel area 12R The area of the red filter layer 30R of the region 12RT, the green filter layer 30G of the penetration region 12GT of the green sub-pixel region 12G, and the blue filter layer 30B of the penetration region 12BT of the blue sub-pixel region 12B. The ratio is generally 0.78~0.82:0.69~0.73: 1.47~1.51, for example, the red filter layer 30R located in the penetration region 12RT of the red sub-pixel region 12R, and the green region 30GT located in the penetration region 12GT of the green sub-pixel region 12G. The area of the filter layer 30G and the blue filter layer 30B of the penetration region 12BT of the blue sub-pixel region 12B may preferably be 0.8: 0.71:1.49, but not limited thereto. In addition, please refer to Table 2. Table 2 lists the red filter layer 30R, green filter The layer 30G and the blue filter layer 30B have the above-described area ratio, and the white-dot color coordinates of the white screen displayed by the electroluminescent display panel 10 at different driving voltages. As can be seen from Table 2, when the driving voltage is substantially between 6.4 volts and 6.8 volts, the white point color coordinates of the white picture can approximate the white point color coordinate specifications (Wx, Wy) of the monitor picture = 0.313, 0.329. Therefore, when the electroluminescent display panel 10 is applied to a monitor, the red filter layer 30R located in the penetration region 12RT of the red sub-pixel region 12R, and the green filter located in the penetration region 12GT of the green sub-pixel region 12G The area ratio of the optical layer 30G to the blue filter layer 30B of the penetration region 12BT of the blue sub-pixel region 12B is substantially 0.78 to 0.82: 0.69 to 0.73: 1.47 to 1.51, and the driving voltage is substantially 6.4. Between volts and 6.8 volts, but not limited to this.

The schematic diagram of the electroluminescent display panel of the present invention is not limited to the above embodiment. The schematic diagram of the electroluminescent display panel of other embodiments of the present invention will be sequentially described below, and in order to facilitate the comparison of the differences of the embodiments and simplify the description, in the following embodiments The same elements are denoted by the same reference numerals, and the differences between the embodiments are mainly described, and the repeated parts are not described again.

Please refer to Figure 4. FIG. 4 is a schematic view showing an electroluminescent display panel according to a second embodiment of the present invention. As shown in FIG. 4, unlike the first embodiment, the electroluminescent display panel 40 of the present embodiment has a plurality of sub-pixel regions, such as a red sub-pixel region 12R, a green sub-pixel region 12G, and a blue color. The pixel area 12B and the white sub-pixel area 12W. The white sub-pixel area 12W includes a transmissive area 12WT and an opaque area 12WN, wherein the transmissive area 12WT is an area that allows light to pass therethrough, and the opaque area 12WN is an area through which light cannot pass. The pixel unit 22 includes a plurality of sub-pixels, for example, a red sub-pixel 22R, a green sub-pixel 22G, a blue sub-pixel 22B, and a white sub-pixel 22W, respectively located in the red sub-pixel region 12R, the green sub-pixel. The area 12G, the blue sub-pixel area 12B and the white sub-picture area 12W. In addition, the color filter pattern 30 further has a white filter layer 30W for causing the white light W provided by the electroluminescent device 24 to remain white after passing through the white filter layer 30W. The white filter layer 30W may be formed of a transparent material such as an acrylic polymer material that allows most of the light in the visible light wavelength range to pass without substantially generating a filtering effect, but is not limited thereto. In a variant embodiment, the white filter layer 30W may also be an opening of the color filter pattern 30.

Please refer to Figure 5 and refer to Figure 4 together. FIG. 5 is a frequency spectrum diagram of the red filter layer, the green filter layer, the blue filter layer, and the white filter layer of the embodiment. As shown in Fig. 5, curve 1 shows that the highest peak spectrum of the spectrum of the red filter layer 30R is between 720 nm and 780 nm, and the relative intensity is substantially between 0.95 and 1; Curve 2 shows that the highest peak of the spectrum of the green filter layer 30G is substantially 537±2 nm, the relative intensity is generally between 0.88 and 0.9, and the half-height of the spectrum of the green filter layer 30G is large. The on-body system is between 105 nm and 109 nm; curve 3 shows that the highest peak of the spectrum of the blue filter layer 30B is substantially 453 ± 2 nm, and its relative intensity is generally between 0.74 and Between 0.76, the full width at half maximum of the spectrum of the blue filter layer 30B is generally between 95 nm and 105 nm; and the curve 4 shows that the lowest peak of the white filter layer 30W is substantially 430 ± 2 nm, and its relative intensity is generally between 0.9 and 1.

Please refer to Figure 6 again and refer to Figure 4 together. FIG. 6 is a schematic view showing the configuration of the color filter layer of the embodiment. As shown in Fig. 6, in the present embodiment, the red sub-pixel area 12R, the green sub-pixel area 12G, the blue sub-pixel area 12B and the white sub-pixel area 12W can be arranged side by side, and the red filter is arranged. The layer 30R, the green filter layer 30G, the blue filter layer 30B, and the white filter layer 30W are respectively disposed in the red sub-pixel region 12R, the green sub-pixel region 12G, the blue sub-pixel region 12B, and the white sub-picture. Prime area 12W. For example, the red sub-pixel region 12R, the green sub-pixel region 12G, the blue sub-pixel region 12B, and the white sub-pixel region 12W may be sequentially arranged in a row direction, but not limited thereto. For example, the arrangement order of the red sub-pixel area 12R, the green sub-pixel area 12G, the blue sub-pixel area 12B, and the white sub-pixel area 12W may be arbitrarily changed depending on the design. In addition, the red sub-pixel region 12R, the green sub-pixel region 12G, the blue sub-pixel region 12B, and the white sub-pixel region 12W may be sequentially arranged in a column direction. In addition, the red sub-pixel region 12R, the green sub-pixel region 12G, the blue sub-pixel region 12B, and the white sub-pixel region 12W may also be configured in other various manners, such as a 2*2 array configuration.

In the present embodiment, the red filter layer 30R located in the penetration region 12RT of the red sub-pixel region 12R, the green filter layer 30G located in the penetration region 12GT of the green sub-pixel region 12G, and the blue sub-pixel The area ratio of the blue filter layer 30B of the penetration region 12BT of the region 12B to the white filter layer 30W of the penetration region 12WT of the white sub-pixel region 12W can be adjusted depending on the application to achieve the desired white color. Point color coordinates specifications. For example, when the electroluminescent display panel 40 is applied to a television set, in order to achieve the white point color coordinate specification (Wx, Wy) of the television picture = 0.28, 0.29, the penetration area 12RT of the red sub-pixel area 12R is located. The red filter layer 30R, the green filter layer 30G located in the penetration region 12GT of the green sub-pixel region 12G, the blue filter layer 30B located at the penetration region 12BT of the blue sub-pixel region 12B, and the white filter The area ratio of the white filter layer 30W of the 12W penetration region 12W is generally 0.47~0.51:0.47~0.51:1.5~1.54:0.47~0.51, for example, the penetration region 12RT located in the red sub-pixel area 12R. The red filter layer 30R, the green filter layer 30G located in the penetration region 12GT of the green sub-pixel region 12G, the blue filter layer 30B located at the penetration region 12BT of the blue sub-pixel region 12B, and the white filter The area of the white filter layer 30W of the penetration region 12WT of the pixel region 12W may preferably be 0.49:0.49:1.52:0.49, but not limited thereto. In addition, please refer to Table 3. Table 3 lists the electroluminescent display panel 40 at different driving voltages under the conditions that the red filter layer 30R, the green filter layer 30G, the blue filter layer 30B, and the white filter layer 30W have the above-described area ratio. The white dot color coordinates of the white screen displayed. As can be seen from Table 3, when the driving voltage is substantially between 6.6 volts and 7 volts, the white point color coordinates of the white picture can approximate the white point color coordinate specifications (Wx, Wy) of the television picture = 0.28, 0.29. Therefore, when the electroluminescent display panel 40 is applied to a television set, it is located in red times. The red filter layer 30R of the penetration region 12RT of the pixel region 12R, the green filter layer 30G of the penetration region 12GT of the green sub-pixel region 12G, and the blue region of the penetration region 12BT of the blue sub-pixel region 12B The area ratio of the color filter layer 30B to the white filter layer 30W of the penetration region 12WT of the white sub-pixel region 12W is substantially 0.47 to 0.51: 0.47 to 0.51: 1.5 to 1.54: 0.47 to 0.51, and the driving voltage is substantially It is between 6.6 volts and 7 volts, but not limited to this.

In addition, when the electroluminescent display panel 40 is applied to a monitor, in order to achieve the white point color coordinate specification (Wx, Wy) of the monitor screen = 0.313, 0.329, the penetration region 12RT of the red sub-pixel region 12R is located. The red filter layer 30R, the green filter layer 30G located in the penetration region 12GT of the green sub-pixel region 12G, the blue filter layer 30B located in the penetration region 12BT of the blue sub-pixel region 12B, and the white sub-paint The area ratio of the white filter layer 30W of the 12W penetration region 12W is generally 0.47~0.51:0.43~0.47:1.43~1.47:0.43~0.47, for example, the penetration region 12RT located in the red sub-pixel area 12R. The red filter layer 30R, the green filter layer 30G located in the penetration region 12GT of the green sub-pixel region 12G, the blue filter layer 30B located at the penetration region 12BT of the blue sub-pixel region 12B, and the white filter The area of the white filter layer 30W of the penetration region 12WT of the pixel region 12W may preferably be 0.49:0.45:1.45:0.45, but not limited thereto. In addition, please refer to Table 4. Table 4 shows that under the conditions that the red filter layer 30R, the green filter layer 30G, the blue filter layer 30B, and the white filter layer 30W have the above-described area ratio, the electroluminescent display panel 40 is driven at different driving voltages. The white dot color coordinates of the white screen displayed. As can be seen from Table 4, when the driving voltage is substantially between 6.4 volts and 6.8 volts, the white point color coordinates of the white picture can approximate the white point color coordinate specifications (Wx, Wy) of the monitor picture = 0.313, 0.329. Therefore, when the electroluminescence display panel 40 is applied to the monitor, the red filter layer 30R located in the penetration region 12RT of the red sub-pixel region 12R, and the green filter located in the penetration region 12GT of the green sub-pixel region 12G The area ratio of the light layer 30G, the blue filter layer 30B of the penetration region 12BT of the blue sub-pixel region 12B and the white filter layer 30W of the penetration region 12WT of the white sub-pixel region 12W is substantially 0.47. ~0.51:0.43~0.47:1.43~1.47:0.43~0.47, and the driving voltage is generally between 6.4 volts and 6.8 volts, but not limited to this. The structure of the electroluminescence element 24, the red filter layer 30R, the material of the green filter layer 30G and the blue filter layer 30B, the spectrum of the white light W provided by the electroluminescence element 24, and its white point color coordinates, and the sub-picture For the structure of the element, etc., refer to the content described in the first embodiment above, and details are not described herein again.

Table 4

It should be noted that, in the electroluminescent display panel of the present invention, the area ratio of the filter layers of various colors of the color filter pattern, the spectrum, the material, and the driving voltage of the electroluminescent display panel and the white light provided thereby The spectrum of the light source and the white point color coordinates are not limited to the ones disclosed in the above embodiments, but may be adjusted according to different applications so that the displayed white screen conforms to a predetermined white point color coordinate specification.

In summary, the electroluminescent display panel of the present invention uses a color filter pattern having a specific spectrum, and adjusts the penetration region located in the red sub-pixel region, the green sub-pixel region, and the blue sub-pixel region. The area ratio of the red filter layer, the green filter layer and the blue filter layer or the penetration region of the red sub-pixel region, the green sub-pixel region, the blue sub-pixel region and the white sub-pixel region The area ratio of the red filter layer, the green filter layer, the blue filter layer and the white filter layer can effectively make the white point color coordinates of the displayed white picture close to the white point color coordinate specification, thereby avoiding white spots. Offset.

The above are only the embodiments of the present invention, and all changes and modifications made by the scope of the present invention should be within the scope of the present invention.

10‧‧‧Electrical excitation display panel

12R‧‧‧Red sub-picture area

12G‧‧‧Green sub-picture area

12B‧‧‧Blue sub-picture area

30‧‧‧Color filter pattern

12RT‧‧‧ penetration zone

12GT‧‧‧ penetration zone

12BT‧‧‧ penetration zone

12RN‧‧‧Opacity zone

12GN‧‧‧Opacity zone

12BN‧‧‧Opacity zone

22‧‧‧ pixel unit

22R‧‧‧Red sub-pixel

22G‧‧‧Green sub-pixels

22B‧‧‧Blue sub-pixel

W‧‧‧White light

24‧‧‧Electrical excitation elements

241‧‧‧First electrode

242‧‧‧second electrode

243‧‧‧Lighting layer

T‧‧‧thin film transistor components

R‧‧‧Red Light

G‧‧‧Green Light

B‧‧‧Blue

30R‧‧‧ red filter layer

30G‧‧‧Green filter layer

30B‧‧‧Blue filter layer

21‧‧‧Substrate

26‧‧‧ polarizer

40‧‧‧Electrical excitation display panel

12W‧‧‧White sub-picture area

22W‧‧‧White pixels

30W‧‧‧White filter layer

244‧‧‧protection layer

244A‧‧‧ openings

245‧‧‧ hole injection layer

12WT‧‧‧ penetration zone

12WN‧‧‧Opacity zone

1‧‧‧ Curve

2‧‧‧ Curve

3‧‧‧ Curve

4‧‧‧ Curve

FIG. 1 is a schematic view showing an electroluminescent display panel according to a first embodiment of the present invention.

FIG. 2 is a frequency spectrum diagram of the red filter layer, the green filter layer and the blue filter layer of the embodiment.

FIG. 3 is a schematic view showing the configuration of the color filter layer of the embodiment.

FIG. 4 is a schematic view showing an electroluminescent display panel according to a second embodiment of the present invention.

FIG. 5 is a frequency spectrum diagram of the red filter layer, the green filter layer, the blue filter layer, and the white filter layer of the embodiment.

FIG. 6 is a schematic view showing the configuration of the color filter layer of the embodiment.

10‧‧‧Electrical excitation display panel

12R‧‧‧Red sub-picture area

12G‧‧‧Green sub-picture area

12B‧‧‧Blue sub-picture area

245‧‧‧ hole injection layer

30‧‧‧Color filter pattern

22‧‧‧ pixel unit

22R‧‧‧Red sub-pixel

22G‧‧‧Green sub-pixels

22B‧‧‧Blue sub-pixel

W‧‧‧White light

24‧‧‧Electrical excitation elements

241‧‧‧First electrode

242‧‧‧second electrode

243‧‧‧Lighting layer

T‧‧‧thin film transistor components

R‧‧‧Red Light

G‧‧‧Green Light

B‧‧‧Blue

30R‧‧‧ red filter layer

30G‧‧‧Green filter layer

30B‧‧‧Blue filter layer

21‧‧‧Substrate

26‧‧‧ polarizer

244‧‧‧protection layer

244A‧‧‧ openings

12RT‧‧‧ penetration zone

12GT‧‧‧ penetration zone

12BT‧‧‧ penetration zone

12RN‧‧‧Opacity zone

12GN‧‧‧Opacity zone

12BN‧‧‧Opacity zone

Claims (10)

An electroluminescent display panel having a pixel unit, wherein the pixel unit comprises a red sub-pixel, a green sub-pixel and a blue sub-pixel, respectively located in a red sub-pixel area, a green color a pixel region and a blue sub-pixel region, the red sub-pixel region, the green sub-pixel region and the blue sub-pixel region respectively comprise a penetrating region, the electroluminescent display panel comprises: a plurality of An electroluminescent element, respectively located in the red sub-pixel region, the green sub-pixel region and the blue sub-pixel region, respectively for providing a white light; and a color filter pattern comprising: a red filter a layer, located in the red sub-pixel region, for converting the white light into a red light after penetrating the red filter layer, wherein a highest peak of a spectrum of the red filter layer is substantially Between 720 nm and 780 nm, and the relative intensity is substantially between 0.95 and 1; a green filter layer is located in the green sub-pixel region for the white light to penetrate The green filter layer is converted into a green light, wherein one of the green filter layers a maximum peak is generally 537 ± 2 nm, and its relative intensity is substantially between 0.88 and 0.9; and a blue filter layer is located in the blue sub-pixel region for The white light is converted into a blue light after penetrating the blue filter layer, wherein a peak of the spectrum of one of the blue filter layers is substantially 453±2 nm, and the relative intensity is substantially 0.74 and Between 0.76. The electroluminescent display panel of claim 1, wherein the spectrum of the white light provided by the electroluminescent element has three peaks. The electroluminescent display panel of claim 2, wherein the white light provided by the electroluminescent device has a white dot color coordinates Wx and Wy, and 0.316 < Wx < 0.319, 0.33 < Wy < 0.36. The electroluminescent display panel of claim 1, wherein the pixel unit is composed of the red sub-pixel, the green sub-pixel, and the blue sub-pixel. The electroluminescent display panel of claim 4, wherein the red filter layer in the penetrating region of the red sub-pixel region, the green filter in the penetrating region of the green sub-pixel region The area ratio of the layer to the blue filter layer located in the penetrating region of the blue sub-pixel region is substantially 0.94 to 0.98: 0.81 to 0.85: 1.19 to 1.23. The electroluminescent display panel of claim 4, wherein the red filter layer in the penetrating region of the red sub-pixel region, the green filter in the penetrating region of the green sub-pixel region The area ratio of the layer to the blue filter layer located in the penetrating region of the blue sub-pixel region is substantially 0.78 to 0.82: 0.69 to 0.73: 1.47 to 1.51. The electroluminescent display panel of claim 1, further comprising a white sub-pixel region, wherein the white sub-pixel region comprises a penetrating region, wherein the pixel unit is the red sub-pixel, the green sub-picture a blue sub-pixel and a white sub-pixel, the white a color sub-pixel is disposed in the white sub-pixel region, and includes an electro-optic element for providing a white light, and the color filter pattern further has a white filter layer for allowing the white light to pass through the white The filter layer is still white after light. The electroluminescent display panel of claim 7, wherein a minimum peak spectrum of one of the white filter layers is 430 ± 2 nm, and the relative intensity is substantially between 0.9 and 1. The electroluminescent display panel of claim 7, wherein the red filter layer in the penetrating region of the red sub-pixel region, the green filter in the penetrating region of the green sub-pixel region a layer, an area ratio of the blue filter layer located in the penetrating region of the blue sub-pixel region and the white filter layer located in the penetrating region of the white sub-pixel region is substantially 0.47 to 0.51 : 0.47~0.51: 1.5~1.54: 0.47~0.51. The electroluminescent display panel of claim 7, wherein the red filter layer in the penetrating region of the red sub-pixel region, the green filter in the penetrating region of the green sub-pixel region a layer, an area ratio of the blue filter layer located in the penetrating region of the blue sub-pixel region and the white filter layer located in the penetrating region of the white sub-pixel region is substantially 0.47 to 0.51 : 0.43~0.47: 1.43~1.47: 0.43~0.47.