TWI569493B - Organic light emitting display panel and testing and compensation methods thereof - Google Patents

Description

Organic light emitting display panel and detection and compensation method thereof

The present invention relates to an organic light emitting display panel and a method for detecting and compensating the same, and more particularly to a method for detecting and compensating an organic light emitting display panel having a thickness compensation step.

With the advancement of technology, flat panel displays have been the most watched display technology in recent years. Among them, the Organic Light Emitting Display (OLED) has great advantages due to its self-illumination, no viewing angle dependence, power saving, simple process, low cost, low temperature operation range, high response speed and full color. Application potential is expected to become the mainstream of the next generation of flat panel displays.

Ink Jet Printing (IJP) can improve material utilization and reduce process cost in the process of OLED. In particular, the film layer in the OLED can be formed by inkjet coating techniques. In order to distinguish the area of each pixel electrode in the OLED, a plurality of bank structures corresponding to the pixel structure are formed before the inkjet coating is performed. Generally, the retaining wall structure is formed by a process such as photolithographic etching of a fluorine-containing negative photoresist. However, during the exposure process, there is a possibility that the energy at the junction of the light source mirror group and the lens group are uneven, and a phenomenon of exposure unevenness (Lens mura) is formed. Therefore, an undercut phenomenon on the etching is caused. In other words, the resulting retaining wall structure will have a sloping edge that affects the difference in brightness after the spot.

At present, the display on the market uses an IC chip to adjust the driving current to compensate for the uneven brightness. However, such an approach requires extra time to collect mapping information and corrections, and requires additional design and use of compensation circuitry. For lighting products, the use of IC compensation methods will increase the huge cost.

The invention provides a method for detecting and compensating an organic light emitting display panel, which can effectively compensate for brightness unevenness on the premise of reducing cost.

The invention provides a method for detecting and compensating an organic light emitting display panel, comprising providing an organic light emitting display panel and performing a detecting step on the organic light emitting display panel to detect an abnormal bright area. Mark the position of the abnormal bright area of the organic light emitting display panel. Calculate the brightness value of the abnormal bright area, and convert the brightness value of the abnormal bright area into a compensation thickness value. Performing a compensation procedure of the organic light emitting display panel to perform a thickness compensation step on the corresponding abnormal bright area of the organic light emitting display panel.

The present invention provides an organic light emitting display panel having a plurality of unit regions on a substrate. The plurality of unit areas include a compensation area and an uncompensated area. The compensation region has a compensation light emitting element layer, and the compensation light emitting element layer includes a first electrode layer, a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, an electron injection layer, a second electrode layer, and a compensation thickness. The first electrode layer is disposed on the substrate. The hole injection layer is disposed on the first electrode layer. The hole transport layer is disposed on the hole injection layer. The light emitting layer is disposed on the hole transport layer. The electron transport layer is disposed on the light emitting layer. The electron injection layer is disposed on the electron transport layer. The second electrode layer is disposed on the electron injection layer. The compensation thickness may be selected to be disposed on the hole injection layer, the hole transport layer, the electron transport layer, the electron injection layer, the light emitting layer or the first electrode layer. The uncompensated region has a light-emitting element layer, and the light-emitting element layer includes a first electrode layer, a hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer, an electron injection layer, and a second electrode layer. The first electrode layer is disposed on the substrate. The hole injection layer is disposed on the first electrode layer. The hole transport layer is disposed on the hole injection layer. The light emitting layer is disposed on the hole transport layer. The electron transport layer is disposed on the light emitting layer. The electron injection layer is disposed on the electron transport layer. The second electrode layer is disposed on the electron injection layer, and the compensation light emitting element layer has a thickness greater than the light emitting element layer.

Based on the above, the present invention detects the brightness value of the abnormal bright area of the organic light emitting display panel and converts it into the compensation thickness value to modify the film thickness in the subsequently manufactured organic light emitting display panel, thereby effectively compensating for the brightness. The phenomenon is uniform, so that the uniformity of illumination of the entire panel is improved.

The above described features and advantages of the invention will be apparent from the following description.

1 is a flow chart of a method of detecting and compensating an organic light emitting display panel of the present invention. 2 is a schematic cross-sectional view of an organic light emitting display panel 10 of the present invention. Referring first to FIG. 1, in step S1, an organic light emitting display panel 10 is provided. Referring to FIG. 2 , the organic light emitting display panel 10 includes a substrate 100 , an active device layer 110 , a first electrode layer 120 , a hole injection layer 130 , a hole transport layer 140 , a light emitting layer 150 , an electron transport layer 160 , and an electron injection layer 170 . The second electrode 180, the protective layer 200, and the retaining wall structure 300. The first electrode layer 120, the hole injection layer 130, the hole transport layer 140, the light emitting layer 150, the electron transport layer 160, the electron injection layer 170, and the second electrode 180 constitute the light emitting element layer O. The manufacturing process of the organic light-emitting display panel 10 will be explained in detail below.

3 is an equivalent circuit diagram of the active device layer 110 and the light-emitting element layer O in the organic light-emitting display panel 10 of the present invention. Referring to FIG. 2 and FIG. 3 simultaneously, the active device layer 110 is first formed on the substrate 100. The substrate 100 is mainly used as a component of an organic light-emitting display device. The material of the substrate 100 may be glass, quartz, organic polymer, plastic, flexible plastic or opaque/reflective material, etc., and the invention is not limited thereto. In the present embodiment, in order to allow light generated by the light-emitting element layer O to be transmitted from the substrate 100, the substrate 100 is preferably a transparent substrate, such as a transparent glass substrate or a transparent flexible substrate. The active device layer 110 has a plurality of pixel structures P, and each pixel structure P includes at least one active device T1, T2. According to an embodiment of the invention, the active device layer 110 further includes a plurality of scan lines SL, a plurality of data lines DL, and a plurality of power lines (not shown) connected to the voltage V _DD . Each pixel structure P is electrically connected to a corresponding one of the scan lines SL, a corresponding one of the data lines DL, and a corresponding one of the power lines (not shown). In the present embodiment, each pixel structure P includes a first active element T1, a second active element T2, and a capacitor CS. It should be noted that, in this embodiment, each pixel structure P is exemplified by two active components with one capacitor (2T1C), but is not intended to limit the present invention, and the present invention is not limited to each pixel. The number of active components and capacitors in structure P.

In the pixel structure of the 2T1C form, the active device T1 has a gate, a source, a drain, and a channel region (not shown), and the source of the active device T1 is electrically connected to the data line DL, the gate and the scan line. The SL is electrically connected, and the drain is electrically connected to the active component T2. Similarly, the active device T2 also has a gate, a source, a drain, and a channel region (not shown), and the gate of the active device T2 is electrically connected to the gate of the active device T1, and the source of the active device T2. It is electrically connected to a power cord (not shown). One electrode end of the capacitor CS is electrically connected to the drain of the active device T1, and the other electrode end of the capacitor CS is electrically connected to the source of the active device T2 and a power line (not shown). On the other hand, at least one of the active elements T1, T2 is electrically connected to the light-emitting element layer O, as shown in FIG.

Referring again to FIG. 2, a plurality of retaining wall structures 300 are formed on the active device layer 110 to define a plurality of corresponding pixel structures P disposed within the unit regions U between each of the retaining wall structures 300. The retaining wall structure 300 is formed, for example, by using a fluorine-containing negative photoresist as a material and subjected to a process such as photolithography etching, but the present invention is not limited thereto. Other materials or methods of forming the retaining wall structure can also be used in the present invention.

Next, a first electrode layer 120 is formed in the cell region U defined by the retaining wall structure 300. The material of the first electrode layer 120 may be a transparent conductive material or an opaque conductive material, and the first electrode layer 120 may be a single layer structure or a multilayer structure. The transparent conductive material includes a metal oxide such as indium tin oxide, indium zinc oxide, aluminum tin oxide, aluminum zinc oxide, indium antimony zinc oxide, or other suitable oxide such as zinc oxide, or It is a stacked layer of at least two of the above. The opaque conductive material comprises a metal such as silver, aluminum, molybdenum, copper or titanium, or other suitable metal. In the above, the first electrode layer 120 is electrically connected to the active device layer 110. In other words, the first active device T1 or the second active device T2 in the active device layer 110 is electrically connected to the light emitting device layer O by the first electrode layer 120. In the present embodiment, the first electrode layer 120 is a cathode as the light-emitting element layer O, but the present invention is not limited thereto. In other embodiments, the first electrode layer 120 may also be the anode of the light emitting element layer O.

After the first electrode layer 120 is formed, the hole injection layer 130, the hole transport layer 140, and the light emitting layer 150 are sequentially formed on the first electrode layer 120. Similar to the first electrode layer 120, the hole injection layer 130, the hole transport layer 140, and the light emitting layer 150 are also formed in the cell region U defined by the retaining wall structure 300. The material of the hole injection layer 130 is, for example, phthalocyanine copper, a star arylamine, polyaniline, polyethylene dioxythiophene or other suitable material. On the other hand, the material of the hole transport layer 140 is, for example, a triarylamine, a cross-structure diamine biphenyl, a diamine biphenyl derivative or other suitable material. The light emitting layer 150 may be a red organic light emitting pattern, a green organic light emitting pattern, a blue organic light emitting pattern, or a different color (for example, white, orange, purple, etc.) light emitting pattern generated by mixing light of each spectrum. As described above, in the present embodiment, the hole injection layer 130, the hole transport layer 140, and the light-emitting layer 150 are all formed using an inkjet process. However, the present invention is not limited thereto. In other embodiments, the hole injection layer 130, the hole transport layer 140, and the light emitting layer 150 may also be formed by evaporation.

Next, an electron transport layer 160 and an electron injection layer 170 are sequentially formed on the light emitting layer 150. The material of the electron transport layer 160 is, for example, an oxazole derivative and a dendrimer thereof, a metal chelate compound, an azole compound, a diazonium derivative, a rhodium-containing heterocyclic compound or other suitable materials. The material of the electron injecting layer 170 is, for example, lithium oxide, lithium boron oxide, potassium oxyhydroxide, cesium carbonate, sodium acetate, lithium fluoride base or other suitable materials. In the present embodiment, since the electron transport layer 160 and the electron injection layer 170 are formed by vapor deposition, they are not required to be disposed in the cell region U defined by the retaining wall structure 300. In other words, the electron transport layer 160 and the electron injection layer 170 may be formed directly on the retaining wall structure 300 as shown in FIG. However, the present invention is not limited thereto, and in other embodiments, the electron transport layer 160 and the electron injection layer 170 may also be formed by evaporation.

After the electron injection layer 170 is formed, the second electrode layer 180 is further formed on the electron injection layer 170. Similar to the first electrode layer 120, the second electrode layer 180 may also be a single layer structure or a multilayer structure. In addition to this, the material of the second electrode layer 180 may be selected from the materials of the foregoing first electrode layer 120. In other words, the material of the second electrode layer 180 may be the same as or different from the first electrode layer 120. It should be noted that in the present embodiment, the second electrode layer 180 is connected to the voltage V _SS and the voltage V _SS is a ground potential. In other words, as shown in FIG. 3, the light-emitting element layer O is connected to the voltage V _SS by the second electrode layer 180. In the present embodiment, the second electrode layer 180 is an anode as the light-emitting element layer O, but the present invention is not limited thereto. In other embodiments, the second electrode layer 180 may also be the cathode of the light emitting element layer O.

After the completion of the second electrode layer 180, the organic light-emitting display panel 10 of the present embodiment has been substantially completed. However, the organic light emitting display panel 10 of the present embodiment may further include the protective layer 200. The protective layer 200 functions to protect the light-emitting element layer O, so that the material thereof may be an organic material or an inorganic material. Specifically, the protective layer 200 is, for example, a cover or other package component, and the invention is not limited thereto.

Referring again to FIG. 1, in step S2, a detecting step is performed to detect whether the organic light-emitting display panel 10 has an abnormally bright area. If the organic light-emitting display panel 10 does not have an abnormally bright area, the organic light-emitting display panel 10 can be determined as a finished product of the organic light-emitting display panel. If the organic light-emitting display panel 10 is detected as an abnormally bright area, step S3 is performed to mark the position of the abnormally bright area. For example, referring to FIG. 2, if the region R0 is detected to have an abnormally bright region, the region R0 is marked.

After the area R0 is marked, step S4 is performed to calculate the brightness value of the abnormal bright area and convert it into a compensation thickness value. That is to say, the abnormal luminance value of the region R0 is compared with other regions having no abnormality, and a thickness value is calculated by the pushback method to compensate the luminance value of the region R0.

After calculating the compensation thickness value, a compensation procedure of the organic light emitting display panel is performed to perform thickness compensation on the corresponding abnormal bright area of the organic light emitting display panel, as shown in step S5. The specific flow of step S5 will be described in detail below.

4A is an enlarged schematic view of a region R0 of the organic light-emitting display panel 10 of FIG. 2. FIG. 4B is an enlarged schematic view of the compensated region R1 of the organic light emitting display panel according to an embodiment of the invention. Please refer to FIG. 4A and FIG. 4B at the same time. In the present embodiment, the detection and compensation process of the organic light-emitting display panel is similar to the detection and compensation process of the organic light-emitting display panel 10, and therefore the same elements are denoted by the same reference numerals and the description thereof will not be repeated. The difference between the two is that in the detection and compensation process of the organic light-emitting display panel, since the thickness value to be compensated for by the abnormal bright region has been obtained in advance, in the step of forming the hole injection layer 130a, the inkjet can be utilized. A process or an evaporation process is performed to change the thickness of the hole injection layer 130a in the abnormally bright region to form the compensation light-emitting element layer X. Specifically, the hole injection layer 130a in the region R1 of the organic light-emitting display panel has a compensation thickness h, so that the thickness thereof is thicker than that of the hole injection layer 130 in the region R0 of the organic light-emitting display panel 10, as shown in FIG. 4A. And Figure 4B shows.

In this embodiment, by detecting the brightness value of the abnormal bright area of the organic light emitting display panel and converting it into the compensation thickness value to modify the film thickness in the subsequently manufactured organic light emitting display panel, the brightness can be effectively compensated. The phenomenon of unevenness is such that the uniformity of illumination of the entire panel is improved.

FIG. 5 is an enlarged schematic view of the compensated region R2 of the organic light emitting display panel according to another embodiment of the present invention. The embodiment of FIG. 5 is similar to the embodiment of FIGS. 4A-4B, and therefore the same elements are denoted by the same reference numerals and the description thereof will not be repeated. The difference between the two embodiments of FIG. 5 and FIG. 4A-4B is that, in the embodiment, the thickness of the hole transport layer 140a in the abnormally bright region is changed by using an inkjet process or an evaporation process to form the compensated light-emitting device layer X. . In other words, the hole transport layer 140a in the region R2 of the organic light-emitting display panel has a compensation thickness h, so that the thickness thereof is thicker than that of the hole transport layer 140a in the region R0 of the organic light-emitting display panel 10, as shown in FIG. 4A and FIG. 5 is shown.

FIG. 6 is an enlarged schematic view of the compensated region R3 of the organic light emitting display panel according to another embodiment of the present invention. The embodiment of Fig. 6 is similar to the embodiment of Figs. 4A-4B, and therefore the same elements are denoted by the same reference numerals and the description thereof will not be repeated. The difference between the two embodiments of FIG. 6 and FIGS. 4A-4B is that, in the present embodiment, the thickness of the light-emitting layer 150a in the abnormally bright region is changed by an ink-jet process or an evaporation process to form the compensation light-emitting element layer X. In other words, the light-emitting layer 150a in the region R3 of the organic light-emitting display panel has a compensation thickness h, so that the thickness thereof is thicker than that of the light-emitting layer 150 in the region R0 of the organic light-emitting display panel 10, as shown in FIGS. 4A and 6. For example, the thickness of the luminescent layer 150 of the same color is about 300 Å (Å), and the thickness variation is about 10% (±5%). The thickness is about 285 Å to 345 Å. . If the thickness of the luminescent layer 150 of the same color varies by more than 10% (±5%), for example, a thickness value of less than about 285 Å (Å) or more than 345 Å (Å) is the difference due to the compensation of the thickness value. However, the above thickness variations may vary depending on the material, and therefore are not limited thereto.

FIG. 7 is an enlarged schematic view of the compensated region R4 of the organic light emitting display panel according to another embodiment of the present invention. The embodiment of Fig. 7 is similar to the embodiment of Figs. 4A-4B, and therefore the same elements are denoted by the same reference numerals and the description thereof will not be repeated. The difference between the two embodiments of FIG. 7 and FIGS. 4A-4B is that, in the present embodiment, the thickness of the electron transport layer 160a in the abnormally bright region is changed by an inkjet process or an evaporation process to form the compensated light-emitting device layer X. In other words, the electron transport layer 160a in the region R4 of the organic light-emitting display panel has a compensation thickness h, so that the thickness thereof is thicker than that of the electron transport layer 160 in the region R0 of the organic light-emitting display panel 10, as shown in FIGS. 4A and 7. Show.

FIG. 8 is an enlarged schematic view of the compensated region R5 of the organic light emitting display panel according to another embodiment of the present invention. The embodiment of Fig. 8 is similar to the embodiment of Figs. 4A-4B, and therefore the same elements are denoted by the same reference numerals and the description thereof will not be repeated. The difference between the two embodiments of FIG. 8 and FIGS. 4A-4B is that, in the present embodiment, the thickness of the electron injection layer 170a in the abnormally bright region is changed by an inkjet process or an evaporation process to form the compensation light-emitting device layer X. In other words, the electron injecting layer 170a in the region R5 of the organic light emitting display panel has a compensation thickness h, so that the thickness thereof is thicker than that of the electron injecting layer 170 in the region R0 of the organic light emitting display panel 10, as shown in FIGS. 4A and 8. Show.

FIG. 9 is an enlarged schematic view of the compensated region R6 of the organic light emitting display panel according to still another embodiment of the present invention. The embodiment of Fig. 8 is similar to the embodiment of Figs. 4A-4B, and therefore the same elements are denoted by the same reference numerals and the description thereof will not be repeated. The difference between the two embodiments of FIG. 9 and FIGS. 4A-4B is that, in the present embodiment, the thickness of the first electrode layer 120a in the abnormally bright region is changed by the evaporation process to form the compensation light-emitting element layer X. In other words, the first electrode layer 120a in the region R6 of the organic light-emitting display panel has a compensation thickness h, so that the thickness thereof is thicker than the electron injection layer 170 in the region R0 of the organic light-emitting display panel 10, as shown in FIG. 4A and FIG. Shown.

In the embodiments of FIG. 5 to FIG. 9 , the brightness values of the abnormal bright areas of the organic light emitting display panel are detected first and converted into compensation thickness values to modify the film layers in the subsequently manufactured organic light emitting display panel. The thickness can effectively compensate for the Lens mura phenomenon to improve the uniformity of illumination of the entire panel. However, the present invention is applicable to repairing a display panel having an abnormal mura, not limited to Lens mura.

Referring to FIG. 1 again, after performing the step S5 and performing the thickness compensation step on the corresponding abnormal bright region of the organic light emitting display panel, step S2 is performed again to determine whether the organic light emitting display panel further has an abnormal bright region. If the organic light emitting display panel does not have an abnormally bright area, the organic light emitting display panel can be determined as a finished product of the organic light emitting display panel. If the organic light-emitting display panel is detected as an abnormally bright area, steps S3 to S5 are performed again. In other words, the brightness value of the abnormal bright area of the organic light emitting display panel is calculated again and converted into another compensation thickness value, and a compensation procedure of the re-organic light emitting display surface is performed to perform another abnormal bright area of the re-organic light emitting display panel. Thickness compensation step. It is to be noted that steps S2 to S5 are repeated until the subsequent organic light-emitting display panel is not detected in the abnormal light area in step S2 and is determined to be the finished product of the organic light-emitting display panel.

After an organic light emitting display panel is determined to be a finished product of the organic light emitting display panel, the subsequent organic light emitting display panel can be batch-produced according to the manufacturing parameters of the finished organic light emitting display panel, and an organic light emitting display is found after the batch is manufactured. Panel sampling to ensure quality. In other words, after the finished product parameters are obtained, as long as the sampling is performed from the subsequent batch manufacturing, it is not necessary to cause each of the organic light emitting display panels to pass the above-described detection and compensation steps, thereby saving costs. If the sampled organic light emitting display panel does not have an abnormally bright area, the next batch of the organic light emitting display panel is continuously manufactured using the previous process parameters. On the other hand, if the sampled organic light-emitting display panel has an abnormally bright region, the above-described steps S1 to S5 are performed again until the subsequent organic light-emitting display panel can be determined as the finished organic light-emitting display panel.

Please refer to FIG. 10 and FIG. FIG. 10 is a top plan view of the organic light emitting display panel 10 after compensation according to still another embodiment of the present invention. Figure 11 is a cross-sectional view showing the line of the organic light-emitting display panel A-A' of Figure 10 . The organic light-emitting display panel 10 has a substrate 100 and a protective layer 200 provided on the opposite side of the substrate 100. The substrate 10 has a plurality of unit areas U for emitting different colors. For example, the unit area U includes a unit area U that emits red light (R), a unit area U of green light (G), and a unit area U of blue light (B). The cell region U emitting red light (R) in this embodiment has a compensation region R ₀ . If the cell region U emitting red light (R) adjacent to the compensation region R _{0 is} not subjected to the compensation step, the overall thickness H1 of the compensated light-emitting device layer X of the A-A' profile compensation region R ₀ of the organic light-emitting display panel 10 is compared. The overall thickness H2 of the light-emitting element layer O in the uncompensated region R ₁ is thick, that is, the total thickness H1 of the light-emitting element layer X is compensated for > the overall thickness H2 of the light-emitting element layer O.

In summary, the present invention can effectively compensate for the thickness of the film in the organic light-emitting display panel that is subsequently manufactured by first detecting the brightness value of the abnormally bright region of the organic light-emitting display panel and converting it into a compensation thickness value. The phenomenon of uneven brightness causes the uniformity of illumination of the entire panel to be improved. The compensation step causes the organic light emitting display panel to have different thickness values for the light emitting elements of the same color emitted by the abnormal bright areas and the normal bright areas.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any one of ordinary skill in the art can make some changes and refinements without departing from the spirit and scope of the present invention. The scope of the invention is defined by the scope of the appended claims.

S1~S5‧‧‧Steps
10‧‧‧Organic display panel
100‧‧‧Substrate
110‧‧‧Active component layer
120‧‧‧First electrode layer
130, 130a‧‧‧ hole injection layer
140, 140a‧‧‧ hole transport layer
150, 150a‧‧ ‧ luminescent layer
160, 160a‧‧‧Electronic transport layer
170, 170a‧‧‧electron injection layer
180‧‧‧second electrode
200‧‧‧protection layer
300‧‧‧Retaining wall structure
O‧‧‧Lighting element layer
X‧‧‧Compensated light-emitting element layer
U‧‧‧Unit area
P‧‧‧ pixel structure
R0, R1, R2, R3, R4, R5‧‧‧ areas
R ₀ ‧‧‧Compensation area
R ₁ ‧‧‧Uncompensated area
SL‧‧‧ scan line
DL‧‧‧ data line
T1, T2‧‧‧ active components
CS‧‧‧ capacitor
V _DD ‧‧‧ voltage
V _SS ‧‧‧ voltage
h‧‧‧Compensation thickness
H1, H2‧‧‧ thickness

1 is a flow chart of a method of detecting and compensating an organic light emitting display panel of the present invention. 2 is a schematic cross-sectional view of an organic light emitting display panel of the present invention. 3 is an equivalent circuit diagram of an active device layer and a light emitting device layer in the organic light emitting display panel of the present invention. 4A is an enlarged schematic view of a region R0 of the organic light emitting display panel of FIG. 2. FIG. 4B is an enlarged schematic view of the compensated region R1 of the organic light emitting display panel according to an embodiment of the invention. FIG. 5 is an enlarged schematic view of the compensated region R2 of the organic light emitting display panel according to another embodiment of the present invention. FIG. 6 is an enlarged schematic view of the compensated region R3 of the organic light emitting display panel according to still another embodiment of the present invention. FIG. 7 is an enlarged schematic view of the compensated region R4 of the organic light emitting display panel according to still another embodiment of the present invention. FIG. 8 is an enlarged schematic view of the compensated region R5 of the organic light emitting display panel according to another embodiment of the present invention. FIG. 9 is an enlarged schematic view of the compensated region R6 of the organic light emitting display panel according to still another embodiment of the present invention. FIG. 10 is a top plan view of an organic light emitting display panel compensated according to still another embodiment of the present invention. Figure 11 is a cross-sectional view of the organic light emitting display panel of Figure 10 taken along line A-A'.

S1~S5‧‧‧Steps

Claims (10)

A method for detecting and compensating an organic light emitting display panel, comprising: performing a detection process, comprising: detecting whether an organic light emitting display panel has an abnormally bright area; and detecting the abnormality when the organic light emitting display panel has the abnormal bright area; The compensation program is not performed when the bright area is at the position on the organic light emitting display panel and is ready to perform a compensation procedure, or the organic light emitting display panel is not detected to have the abnormal bright area; wherein the compensation program includes: calculating the abnormality a brightness value of the bright area, and converting the brightness value of the abnormal bright area into a compensation thickness value; performing a thickness compensation on the abnormal bright area of the organic light emitting display panel according to the compensation thickness value; and performing the detection process again. The method of detecting and compensating an organic light emitting display panel according to claim 1, wherein the thickness compensation comprises: forming a compensation thickness by an inkjet process to change a thickness of the abnormally bright region of the organic light emitting display panel. The method for detecting and compensating an organic light emitting display panel according to the first aspect of the invention, wherein the manufacturing process of the organic light emitting display panel comprises: forming a first electrode layer; forming a hole injection on the first electrode layer Forming a hole transport layer on the hole injection layer; forming a light-emitting layer on the hole transport layer; forming an electron transport layer on the light-emitting layer; forming an electron injection layer on the electron transport layer And forming a second electrode layer on the electron injecting layer, wherein the hole injecting layer, the hole transporting layer, the electron transporting layer, the electron injecting layer and the emitting layer are formed using an inkjet process. The method of detecting and compensating an organic light emitting display panel according to claim 3, wherein the step of performing the thickness compensation on the abnormally bright region of the organic light emitting display panel comprises: forming the electricity in the organic light emitting display panel The hole injecting layer, the hole transporting layer, the electron transporting layer, the electron injecting layer or the light emitting layer are simultaneously subjected to the thickness compensation step by using the ink jet process to correspond to the abnormally bright region. The method for detecting and compensating an organic light emitting display panel according to the first aspect of the invention, wherein the manufacturing process of the organic light emitting display panel comprises: forming a first electrode layer; forming a hole injection on the first electrode layer Forming a hole transport layer on the hole injection layer; forming a light-emitting layer on the hole transport layer; forming an electron transport layer on the light-emitting layer; forming an electron injection layer on the electron transport layer And forming a second electrode layer on the electron injecting layer, wherein the hole injecting layer, the hole transporting layer, the electron transporting layer, the electron injecting layer, the emitting layer, and the first electrode layer are The evaporation process is formed. The method of detecting and compensating an organic light-emitting display panel according to claim 5, wherein the step of performing the thickness compensation on the abnormally bright region of the organic light-emitting display panel comprises: forming the electricity in the organic light-emitting display panel The hole injecting layer, the hole transporting layer, the electron transporting layer, the electron injecting layer, the light emitting layer or the first electrode layer are simultaneously subjected to the thickness compensation step by using the vapor deposition process in the corresponding abnormal bright region. The method for detecting and compensating an organic light-emitting display panel according to claim 3, wherein before forming the hole injection layer, forming a retaining wall structure to define a plurality of unit regions, and The hole injection layer, the hole transport layer, and the light emitting layer are formed in a cell region defined by the retaining wall structure. The method for detecting and compensating an organic light-emitting display panel according to claim 1, wherein the step of performing the thickness compensation on the abnormally bright region of the organic light-emitting display panel further comprises: performing the organic light-emitting display panel The detecting step; if the abnormal bright area of the organic light emitting display panel still exists, calculating a brightness value of the abnormal bright area of the organic light emitting display panel and converting it into another compensation thickness value; and performing a re-organic light emitting display panel a compensation procedure for performing another thickness compensation step on the opposite bright region of the re-organic light-emitting display panel. An organic light emitting display panel having a plurality of unit regions on a substrate, the plurality of unit regions including: a compensation region having a compensation light emitting device layer, the compensation light emitting device layer comprising: a first electrode layer disposed on the a substrate; a hole injection layer disposed on the first electrode layer; a hole transport layer disposed on the hole injection layer; a light emitting layer disposed on the hole transport layer; an electron transport layer, An electron injection layer is disposed on the electron transport layer; a second electrode layer is disposed on the electron injection layer; and a compensation thickness is selectively disposed on the hole injection layer, the electricity a hole transport layer, the electron transport layer, the electron injection layer, the light-emitting layer or the first electrode layer; and an uncompensated region having a light-emitting element layer, the light-emitting element layer comprising: a first electrode layer, a hole injection layer disposed on the first electrode layer; a hole transport layer disposed on the hole injection layer; a light emitting layer disposed on the hole transport layer; a sub-transport layer disposed on the light-emitting layer; an electron injection layer disposed on the electron transport layer; and a second electrode layer disposed on the electron injection layer, wherein the compensation light-emitting element layer has a thickness greater than the light-emitting element Floor. The organic light-emitting display panel of claim 9, wherein the compensation area and the uncompensated area are used to emit colored light of the same color.