JPH075453A - Liquid crystal display device and method for correcting defect of liquid crystal display device - Google Patents

Abstract

PURPOSE:To provide the liquid crystal display device having a high correction rate by surely correcting the bright point picture element of the high-brightness liquid crystal display device formed by sticking microlens array substrates to each other. CONSTITUTION:A two-stage recessed part 23 is formed near the surface existing on the same irradiation route as the bright point picture element of the incident side transparent substrate 10 to be stuck with the microlens array substrate 23. A recessed part 18 is formed near the surface existing on the same irradiation route as the bright point picture element of the incident side transparent substrate 10 to be stuck with the microlens array substrate 23. A resin is packed into this recessed part 18. Illuminating light is scattered by this recessed part 22 to correct the bright point picture element so as not to be be conspicuous as a defect with respect to the ambient normal picture elements.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmissive liquid crystal panel in which liquid crystal is enclosed between a pair of transparent substrates and display picture elements are arranged in a matrix, and a microlens array is provided on the transparent substrate on the illumination light incident side. The present invention relates to a high-brightness liquid crystal display device in which substrates are bonded together and a method for correcting bright spot defects in the liquid crystal display device.

[0002]

2. Description of the Related Art An active matrix drive type liquid crystal panel used in a projection type liquid crystal display device is
A pixel electrode arranged in a matrix on one glass substrate of a pair of glass substrates and a TFT (thin film transistor) connected to each pixel electrode are provided, and a voltage is applied to each pixel electrode by the switching operation of this TFT. The display operation is performed by selecting or deselecting the application.

By the way, since the TFT has a multi-layered structure in which a gate electrode, a source electrode, a drain electrode, an insulating layer, a semiconductor layer and the like are laminated on a glass substrate, a process of laminating each of these layers on the glass substrate is required. The step of patterning each of these layers is repeated. Therefore, in order to manufacture a perfect TFT without defects, great effort is required to strictly maintain and control various conditions in the manufacturing process.

Therefore, in some cases, a defective TFT in which normal TFT characteristics are not obtained may be generated, and a defect that can be repaired can be repaired by using a respective repair technique depending on the type of the defect. . As an example of such a defect of the TFT, when the display cannot be repaired on the circuit forming pattern and the display is driven, the picture element connected to the TFT becomes a bright point which is recognized on the display screen. There is a defect.

As a method of correcting this bright spot defect, there is Japanese Patent Application No. 3-36279 filed by the applicant of the present application, which is shown in FIG. In this structure, a concave portion 32 is formed near the surface (correction portion 31) of the transparent substrate 11 on the emitting side located on the irradiation path of the illumination light 12 that illuminates the bright spot picture element 9, and the concave processing portion 3 is formed.
The bottom surface 32A and the side surface 32B of No. 2 are roughened to suppress the transmitted light of the bright spot picture element and reduce the brightness of the bright spot picture element.

Further, the applicant of the present application has modified the structure of the liquid crystal display device and the modification of the bright spot picture element by modifying the bright spot picture element in the high brightness type liquid crystal display device in which the microlens array substrate 33 is bonded. The method was filed in Japanese Patent Application No. 5-104582. FIG. 11 shows the structure thereof. The vicinity of the surface of the incident side transparent substrate 10 located on the irradiation path of the illumination light 12 for irradiating the bright spot defect picture element 9 generated in the liquid crystal display panel (correction unit 3
The recessed portion 36 is formed in 5), and the bottom surface 36A and the side surface 36B of the recessed portion are roughened.

[0007]

SUMMARY OF THE INVENTION The present invention is a high-brightness type liquid crystal display device in which microlens array substrates are bonded together, and a liquid crystal in which a bright spot picture element is corrected to enable a higher correction rate. Another object is to obtain a display device and a correction method for correcting a bright spot picture element.

In the structure of FIG. 11, the adhesive 37 for adhering the microlens array substrate 33 and the glass substrate 10 may infiltrate and fill the recessed portion 36. Alternatively, the adhesive 37 does not completely enter the recessed portion 36, but the cavity is made smaller. The adhesive 32 for bonding the microlens array substrate and the glass substrate is made of a material having substantially the same refractive index as that of the transparent glass substrate 2 and a high transmittance. Therefore, when the recess 32 is filled with the adhesive 32, the transparent substrate is transparent. No difference in refractive index from that of No. 2 is obtained, so that the illumination light 12 cannot be sufficiently refracted, attenuated, or blocked. Therefore, the illumination light 12 is incident on the bright spot defect pixel 9 and the bright spot pixel cannot be sufficiently corrected.

An object of the present invention is to solve the above problems and improve the correction rate of bright spot defect picture elements, and attenuate the illumination light over the entire irradiation light path of the illumination light for illuminating the bright spot defects of the liquid crystal panel. To enable that.

[0010]

A first liquid crystal display device of the present invention comprises an incident side transparent substrate, an opposite side transparent substrate, and liquid crystal sealed between the incident side transparent substrate and the opposite side transparent substrate. A transmissive liquid crystal panel, and a microlens array substrate having microlenses attached to the surface of the incident side transparent substrate, the microlens array being arranged corresponding to each pixel region of the matrix formed by the transmissive liquid crystal panel, In a liquid crystal display device having a light source means for irradiating display illumination light from the direction of the microlens array substrate, an incident light located on an irradiation path of the illumination light for irradiating the bright point defect picture element generated in the transmission type liquid crystal panel. This is a structure in which a two-step recessed portion having a large outer shape on the surface side and a small outer shape on the liquid crystal side is formed near the surface of the side transparent substrate. The outer shape of the two-step depressed portion may be circular, quadrangular, elliptical, pentagonal, or any other shape.

Further, according to the present invention, before the step of adhering the microlens array substrate to the incident side transparent substrate, a step of detecting a bright spot defect and an illumination for irradiating a pixel in which the bright spot defect has occurred And a step of forming a two-step recessed portion including a recessed portion having a large outer shape and a recessed portion having a small outer shape formed in the center thereof in the vicinity of the surface of the incident-side transparent substrate located on the light irradiation path. A method of correcting a defect in a liquid crystal display device including:

In the above-mentioned two-step recessed portion, a recessed portion having a large outer shape is first formed, and then a recessed portion having a small outer shape is formed at the center thereof, and a recessed portion having a small outer shape is formed deeply. After that, there is a method of forming a depressed portion having a large outer shape. The recessed portion is formed by laser etching using an excimer laser beam.

A second liquid crystal display device of the present invention is a transmissive liquid crystal panel comprising an incident side transparent substrate, an opposite side transparent substrate, and liquid crystal sealed between the incident side transparent substrate and the opposite side transparent substrate. , A microlens array substrate having microlenses attached to the surface of the incident side transparent substrate and arranged corresponding to each matrix-shaped picture element region formed by the transmissive liquid crystal panel, and displaying from the direction of the microlens array substrate In a liquid crystal display device having a light source means for irradiating illumination light for use in the vicinity of the surface of an incident side transparent substrate located on the irradiation path of the illumination light for irradiating the bright spot defect picture element generated in the transmission type liquid crystal panel. This is a structure in which a recessed processed portion is formed, and the recessed processed portion is filled with a resin having a lower transmittance than that of the incident side transparent substrate.

Further, according to the present invention, before the step of adhering the microlens array substrate to the incident side transparent substrate, a step of detecting a bright spot defect and an illumination for irradiating a pixel in which the bright spot defect is generated. Characterized by performing a step of forming a concave processed portion near the surface of the incident side transparent substrate located on the light irradiation path, and a step of filling the concave processed portion with a resin having a lower transmittance than the incident side transparent substrate. The liquid crystal display device has a defect repairing method. Further, according to the present invention, a resin having a high transmittance is used as a resin to be filled in the recessed portion, and after the microlens array substrate is bonded, the resin is discolored or blackened.
Further, preferably, the high transmittance resin is made of the same material as used for bonding the microlens array substrate and the incident side transparent substrate.

[0015]

As described above, the recessed portion is formed immediately below the microlens so that the recessed portion has a two-step structure.
As a result, the adhesive for bonding the microlens array substrate and the incident side transparent substrate does not enter the recessed portion having a small outer shape in the second step, and the cavity can be reliably formed.

By filling the recessed portion with a resin having a low transmittance, it is possible to surely form a layer having a low transmittance.

Since the recessed portion formed immediately below the microlens is at a stage where the effect of converging the illumination light by the microlens is not yet exhibited, the dimming effect of the incident light in the recessed portion is large. Further, since there are no bubbles in the recessed portion, the correction portion has high reliability. Further, by changing the color of the resin after assembling the microlens substrate, an appropriate amount of light reduction can be obtained. Further, if the inner surface of the recessed portion is roughened, the adhesion between the resin and the transparent substrate is improved and the reliability is increased.

Further, since the concave portion is formed close to immediately below the microlens, the corrected size is equal to the microlens size, that is, light leakage does not occur at one pixel size. As a result, the existence of the bright spot picture elements is inconspicuous with respect to the surrounding normal picture elements. That is, the bright spot picture element is modified.

[0019]

EXAMPLE An example of the present invention will be described below.

FIG. 1 schematically shows one step of a defect repairing method according to an embodiment of the present invention. The laser beam 2 emitted from the excimer laser oscillator 1 is a slit pattern. After passing through the lens 3 and being reflected by the ultraviolet reflecting mirror 4, the light is focused and irradiated on the bright spot correction portion 8 of the liquid crystal panel 7 set on the mounting table 6 through the lens 5. As indicated by the diagonal lines in FIG. 2, the bright spot correction unit 8 is on the same irradiation path as the bright spot picture element 9 that produces a bright spot for the irradiation light. In addition, the bright spot correction unit 8 of the present embodiment is a glass substrate on the side where the illumination light 12 from the light source is incident on the liquid crystal panel 7 among the pair of glass substrates 10 and 11 that are bonded together as shown in FIG. Selected near the surface of 10. On the inner surface of the incident side glass substrate 10, openings of a black mask 13 are arranged corresponding to the picture elements, and a counter electrode 14 for applying a voltage to the liquid crystal is provided.

On the other hand, on the inner surface of the glass substrate 11 on the side where the illumination light 12 is emitted, the picture element electrodes 15 arranged in a matrix and the TF for switching the power supply to the picture element electrodes 15 are switched.
T16 is formed, and the gap between both glass substrates 10 and 11 is 90.
A twisted nematic liquid crystal layer 17 that is twist-oriented by a degree or more is encapsulated.

The direction of incidence of the laser beam 2 on the bright spot correction portion 8 of the liquid crystal panel 7 coincides with the direction of incidence of the illumination light 12 on the liquid crystal panel 7.

Incidentally, the slit pattern 3 is formed with a pattern in which the outer size of the bright spot correction portion is enlarged, and the laser beam is formed by reducing slit exposure through the slit pattern 3. The frame 2 is accurately irradiated onto the position of the bright spot correction unit 8. In addition, if such a slit pattern 3 is used, the recessed portion 1 will be described below.
There is an advantage that the rough surface 19 can be formed on the inner surface of 8 with various uneven steps. Further, the mounting table 6 is movable in the two XY orthogonal directions, for example, in a horizontal plane, and the movement of the mounting table 6 causes the laser beam 2 to move to a desired bright spot correction section 8. It is possible to irradiate.

To detect the bright spot picture element 9, in the previous step, the liquid crystal panel 7 is irradiated with the illumination light 12 from the light source to project the display image of the liquid crystal panel 7 in the driving state on the display surface. The projected image is inspected by image recognition of the inspection device or visually inspected by an inspector. The shape of the recessed portion 18 formed by using the slit pattern 3 according to the embodiment of the present invention is formed in two steps as shown in an enlarged manner in FIG. That is, the slit pattern 3a having a large diameter is first used, and the shallow concave portion 21 having a diameter larger than the microlens 20 is formed. Next, a slit pattern 3 having a smaller diameter is used to form a deep recess 22 having a diameter slightly larger than that of the microlens 20. The two-step recess is formed by first forming a small and deep recess 22 and then a large and shallow recess 2.
1 may be formed. The recessed portion may be formed in three or more steps as required.

As shown in FIGS. 5 and 6, the recessed portion 18 corresponds to the bright spot picture element 9 in the shape of a quadrangular pyramid or a cone which is narrowed toward the bottom surface. Illumination which is formed on the surface portion of the glass substrate 10, that is, on the bright spot correction portion 8, and rough surfaces 19A and 19B are formed on the bottom surface and side surfaces (inclined surfaces) of the concave portion 18, whereby the bright spot picture element 9 is transmitted. Reduce or block light.

The recessed portion 18, rough surface 19A,
19B is formed by the following etching process using an excimer laser. First, the slit pattern
After setting the reduction ratio of the laser beam 2 and the energy density of the laser beam 2 which are subjected to reduction exposure through the lens 3, to appropriate values, the excimer laser oscillator 1 reads the laser beam. The-
The beam 2 is applied to the bright spot correction portion 8 to form the recessed portion 18.

Next, as a slit pattern 3b, as shown in FIG.
As shown in Fig. 4, a mesh-shaped slit pattern mask with round holes 3bb is inserted, and in this state the laser
The beam 2 is irradiated on the recessed portion 18. As a result, a serrated rough surface 19B is formed on the side surface of the recessed portion 18,
At the same time, a mesh-shaped rough surface 19A is formed on the bottom surface.

As for the specifications of the recessed portion 18, the recess 21 having a large diameter has a microlens size (114 μm) regardless of whether the outermost surface has a quadrangular pyramid shape or a conical shape.
Larger (diameter 160-200μm, optimum value 170μ
m, depth 30 to 60 μm, optimum value 40 μm), and the recess 22 having a small diameter is the size of the microlens (114 μm.
m) or slightly larger (110 to 80 μm, optimum value 120 μm, depth 120 to 200 μm from the substrate surface, optimum value 150 μm from the substrate surface). The inclination angle is set to 5 to 45 degrees, preferably 20 degrees or less for the concave portion 21 having a large diameter, and 5 to 30 degrees, preferably 15 degrees or less for the concave portion 22 having a small diameter. The diameter difference between the large-diameter concave portion 20 and the small-diameter concave portion 21 must be at least 20 μm or more.

The dimming level by such a correction method can be obtained by changing the size and depth of the recess 18 by changing the number of laser shots. After that, in the liquid crystal panel roughened to a desired level, the microlens array 23 is attached to the surface of the incident side transparent substrate 10 using a transparent adhesive 24 as shown in FIG.

The transparent adhesive 24 has its viscosity, surface tension,
The wettability with the glass substrate 10, the inclination angle of the large-diameter concave portion 21 forming the concave portion 18, the difference in diameter between the large-diameter concave portion 21 and the small concave portion 22, the roughness of the stepped surface of the concave portion 21, and other conditions. Thereby, it is possible to prevent the recess 22 having a small diameter from entering the recess 22, and the recess 22 can be surely formed into a hollow. In particular, the diameter difference between the recess 21 and the recess 22 is 20
The diameter of the adhesive 22 is set to be equal to or larger than μm, and the stepped surface of the recess 21 is roughened to ensure that the adhesive 22 has a small diameter.
I was able to prevent you from getting in.

Further, in the second embodiment of the present invention, as shown in FIG.
Before bonding the surface of No. 0 with the transparent adhesive 24, the recess 18 is filled with the resin 28 having a smaller refractive index than the glass substrate 10. By appropriately selecting the refractive index and the transmittance of the resin 28, the amount of light reduction can be optimized. The amount of dimming can be adjusted to match the brightness of the bright spot picture element. Since the recessed portion 18 has few bubbles or cavities, the bubble portion expands even when a reliability test such as a heat cycle is performed, the dimming level changes, or the microlens substrate 23 and the transparent substrate 1 are used.
0 does not cause peeling.

The above-mentioned surface roughening treatment may be carried out by laser etching with a CO ₂ laser, or may be carried out by engraving with a diamond needle or a cemented carbide needle. However, excimer laser etching has the following advantages over these methods. First, as compared with the touch-etching method, there are advantages that the rough surface processing becomes easy and the rough surface 19 having a high accuracy of the uneven shape can be formed.

[0033] On the other hand, CO ₂ Les - The - and when compared, CO ₂
Since the laser etching is thermal processing, the bright spot correction portion 8
It will give thermal damage to the glass around the
The excimer laser etching has an advantage of not giving such a thermal damage. Therefore,
For the above reasons, the repair method of forming the rough surface 19 by excimer laser etching is the most preferable for carrying out the method. Further, as the enclosed gas in the excimer laser etching, ArF having an oscillation wavelength of 193 nm, KrF having an oscillation wavelength of 248 nm, XeCl having an oscillation wavelength of 308 nm, etc. are used. However, it can be confirmed from the following experimental results by the present inventors that the excimer laser etching process using KrF as the filling gas is the most preferable correction method. It was

That is, in order to examine the optimum type of excimer laser gas for roughening the incident light to the bright spot correction section 8, the type of the enclosed gas was changed and an experiment was conducted under the same pulse shot conditions. As for the surface roughness of the rough surface, KrF was the roughest, followed by ArF. On the other hand, when XeCl was used as the filling gas, the laser beam 2 could not be roughened because it penetrated the glass surface. And
When the rough surface of KrF, which has the most rough surface, was observed with a microscope, it was confirmed that the rough surface was sandy and the transmission of transmitted illumination was sufficiently suppressed.

After the microlens array substrate 23 is attached, the resin 28 is irradiated with, for example, a laser beam to change its color, so that the required dimming level can be easily obtained. As a result, the display quality is improved without being too bright or too dark as compared with the surrounding picture elements. Further, if the resin 28 is made of the same material as the adhesive 24, the reliability is improved and the cost can be reduced.

The color filters not shown in the examples are R (red) and G as in the liquid crystal panel used in the projection type liquid crystal display device of the single plate panel type.
(Green), B (blue) color filters of three primary colors are alternately arranged on a transparent substrate, and each panel such as a liquid crystal panel used in a projection type liquid crystal display device of a three-panel system. Dedicated to the color filters of the three primary colors of R (red), G (green), and B (blue), that is, color filters
Is in the liquid crystal panel, or in a position independent of the liquid crystal panel, the correction method of the present invention can be similarly carried out in any color filter type liquid crystal panel.

<< Comparative Example >> FIG. 12 is a sectional view showing a high-brightness type liquid crystal display device in which microlens array substrates are bonded together, using the correction method of the prior application (Japanese Patent Application No. 3-36279). In this liquid crystal display device, a microlens array substrate 23 in which a microlens 20 is arranged corresponding to each picture element 15 is used as a transparent substrate 10 on an incident side of illumination light 12.
The illumination light 12 to each of the picture elements 15 is attached to the surface of, and the liquid crystal display device with high brightness is realized by the condensing effect of the microlens 20. In this high-brightness type liquid crystal display device, a concave portion 36 is formed near the surface (correction portion 35) of the transparent substrate 11 on the emission side located on the irradiation path of the illumination light 12 for irradiating the bright spot picture element 9, and the concave portion is formed. Bottom 3
By roughening 6A and the side surface 36B, the transmitted light of the bright spot picture element is suppressed, and the brightness of the bright spot picture element is reduced.

However, when the surface of the transparent substrate 11 on the emission side where the light condensing effect is exhibited by the microlens 20 is corrected by the above-mentioned correction method, the amount of light transmitted through the correction portion is increased due to the light condensing effect of the microlens 20. It becomes difficult to reduce the brightness of the bright spots to the same level as the brightness levels of the surrounding normal picture elements. Since it is also necessary to consider the angle deviation of the optical axis entering the microlens, the correction size of the correction unit 35 needs to be 1.3 times the pixel pitch or more. There is a problem that the size of the correction point becomes noticeable.

[0039]

As described in detail above, in order to surely reduce the brightness of the bright spot defect picture element in the high-brightness liquid crystal display device with the microlens to the same extent as the normal picture element, the present invention has a two-stage structure. By forming the recessed processed portion close to immediately below the microlens, and by filling the recessed processed portion with resin, light entering the bright spot defect picture element is dimmed at this recessed processed portion, Since the bright spot defect picture element becomes inconspicuous to the surrounding normal picture element and the correction size may be almost equivalent to the picture element size, this also has a great effect that the correction point is inconspicuous. Moreover, there are few bubbles in the recessed portion, and the reliability is improved.

[Brief description of drawings]

FIG. 1 is a diagram schematically showing a defect repairing method using an excimer laser device for explaining an embodiment of the present invention.

FIG. 2 is a diagram showing that a bright spot picture element and a bright spot correction unit are on the same irradiation path for illumination light.

FIG. 3 is a cross-sectional view of a liquid crystal panel showing the shape of a recessed portion formed by excimer laser etching.

FIG. 4 is an enlarged cross-sectional view showing a positional relationship between a two-step depressed portion and a microlens array.

FIG. 5 is a view showing that the recessed portion has a quadrangular pyramid shape.
FIG.

6 is a view in the direction of arrow A in FIG. 3 showing that the recessed portion has a conical shape.

FIG. 7 is a view showing a slit pattern mask used for excimer laser etching.

FIG. 8 is a cross-sectional view showing a liquid crystal panel, which is a completed product after the microlens array is bonded to the liquid crystal panel after the modification according to the first embodiment of the present invention.

FIG. 9 is a cross-sectional view showing a liquid crystal panel, which is a completed product after the microlens array is bonded to the liquid crystal panel after the modification according to the second embodiment of the present invention.

FIG. 10 is a cross-sectional view of a liquid crystal panel showing a first modification method of the patent previously filed by the inventors including the present inventors.

FIG. 11 is a cross-sectional view of a liquid crystal panel showing a second modification method of the patent previously filed by the inventors including the present inventors.

FIG. 12 is a cross-sectional view of a high-brightness liquid crystal panel illustrating a comparative example.

[Explanation of symbols]

 1 Laser oscillator 2 Laser beam 3 Slit pattern 6 Mounting table 7 Liquid crystal panel 8 Bright spot correction part 9 Bright spot picture element 10 Glass substrate 11 Glass substrate 12 Illuminating light 13 Black mask 14 Counter electrode 15 Picture element electrode 16 TFT 17 Liquid crystal layer 18 recessed portion 19 rough surface 20 microlens 21 concave with large diameter 22 concave with small diameter 23 microlens array 24 adhesive 28 resin

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Motoki Iguro 22-22 Nagaike-cho, Abeno-ku, Osaka-shi, Osaka

Claims (10)

[Claims] 1. An incident side transparent substrate and an opposite side transparent substrate,
A transmissive liquid crystal panel comprising a liquid crystal enclosed between the incident side transparent substrate and the opposite side transparent substrate, and matrix-shaped pixel regions formed by the transmissive liquid crystal panel that are bonded to the incident side transparent substrate surface. In a liquid crystal display device having a microlens array substrate having microlenses arranged corresponding to, and a light source means for irradiating display illumination light from the direction of the microlens array substrate, the liquid crystal display device is generated in the transmissive liquid crystal panel. A liquid crystal display device in which a two-step recessed portion having a large outer shape on the surface side and a small outer shape on the liquid crystal side is formed near the surface of an incident side transparent substrate located on the irradiation path of illumination light for irradiating a bright spot defect pixel. 2. An incident side transparent substrate and an opposite side transparent substrate,
A transmissive liquid crystal panel comprising a liquid crystal enclosed between the incident side transparent substrate and the opposite side transparent substrate, and a matrix of pixel regions formed by the transmissive liquid crystal panel, which are bonded to the transmissive liquid crystal panel. A defect correction method for a liquid crystal display device, comprising: a microlens array substrate having correspondingly arranged microlenses; and a light source means for irradiating display illumination light from the direction of the microlens array substrate. A step of detecting a bright spot defect before the step of bonding the transparent substrate to the incident side transparent substrate;
In the vicinity of the surface of the incident side transparent substrate located on the irradiation path of the illumination light for irradiating the pixel in which the bright spot defect has occurred, a recessed portion having a large outer shape and a recessed portion having a small outer shape formed at the center thereof And a step of forming a two-step concave processed portion including a processed portion. 3. The defect repairing method for a liquid crystal display device according to claim 2, wherein the two-step recessed portion is formed by first forming a recessed portion having a large outer shape and then forming a recessed portion having a small outer shape. 4. The defect repairing method for a liquid crystal display device according to claim 2, wherein the two-step recessed portion is formed by forming a recessed portion having a small outer shape deeply and then forming a recessed portion having a large outer shape. 5. An incident side transparent substrate and an opposite side transparent substrate,
A transmissive liquid crystal panel comprising a liquid crystal enclosed between the incident side transparent substrate and the opposite side transparent substrate, and matrix-shaped pixel regions formed by the transmissive liquid crystal panel that are bonded to the incident side transparent substrate surface. In a liquid crystal display device having a microlens array substrate having microlenses arranged corresponding to, and a light source means for irradiating display illumination light from the direction of the microlens array substrate, the liquid crystal display device is generated in the transmissive liquid crystal panel. A concave processed portion is formed near the surface of the incident side transparent substrate located on the irradiation path of the illumination light for irradiating the bright point defect picture element, and the concave processed portion is filled with a resin having a transmittance different from that of the incident side transparent substrate. A liquid crystal display device characterized by the above. 6. An incident side transparent substrate and an opposite side transparent substrate,
Corresponding to each of the matrix-shaped pixel regions formed by the transmissive liquid crystal panel and the transmissive liquid crystal panel that is formed of the liquid crystal sealed between the incident side transparent substrate and the opposite side transparent substrate. A microlens array substrate having microlenses arranged in parallel and a light source means for irradiating display illumination light from the direction of the microlens array substrate. A step of detecting a bright spot defect before the step of bonding to the incident side transparent substrate;
A step of forming a recessed processed portion near the surface of the incident side transparent substrate located on the irradiation path of the illumination light for irradiating the picture element in which the bright spot defect has occurred; A method of repairing defects in a liquid crystal display device, which comprises performing a step of filling resins having different transmittances. 7. A step of filling the recessed portion with a resin having a higher transmittance than that of the incident-side transparent substrate, bonding the microlens array to the incident-side transparent substrate, and then irradiating the resin with a laser to change color or The defect repairing method for a liquid crystal display device according to claim 6, further comprising the step of blackening and reducing the transmittance. 8. The method of repairing defects in a liquid crystal display device according to claim 7, wherein the resins having different transmittances are made of the same material as an adhesive for bonding the microlens array and the incident side transparent substrate. 9. The defect repairing method for a liquid crystal display device according to claim 2, 3, 4, 6, or 7, wherein the recessed portion is formed by laser etching using an excimer laser beam. 10. The roughening process is performed on the inner surface of the recessed processed portion.
A method for correcting a defect of the liquid crystal display device described.