Display device

Description: TECHNICAL FIELD [Detailed description of the invention]

【0001】

[Technical field to which the invention belongs]

The present invention relates to a display device, and more particularly to a display device having a liquid crystal display element.

【0002】

[Conventional technology]

Conventionally, there are display devices as shown in FIGS. 5 and 6. Reference numeral 1 denotes a liquid crystal display element, and the liquid crystal display element 1 has a number display unit (variable display unit 3) composed of segments 2 arranged in a Japanese character shape. A bulb 4 is arranged behind the liquid crystal display element 1, and the bulb 4 illuminates the liquid crystal display element 1. Reference numerals 5 and 6 are display boards, and the display boards 5 and 6 have arrow-shaped fixed display sections 7 and 8. Display boards 5 and 6 are transparent colored layers 11 and 12 and semi-transparent colored layers 13 and 14 formed on substrates 9 and 10 made of a translucent resin, and fixed display units 7 and 8 are transparent colored layers. It consists of 11,12. Since the semi-transparent layers 13 and 14 are provided on the front side of the transparent colored layers 11 and 12, the fixed display units 7 and 8 are not normally visible, but valves arranged behind the display plates 5 and 6 respectively. When 15 and 16 are turned on, the fixed display units 7 and 8 are transmitted and visually recognized.

【0003】

[Problems to be Solved by the Invention]

Reference numeral 17 denotes a return member, and the return member 17 is provided with openings 18, 19 and 20 corresponding to the variable display unit 3 and the fixed display units 7 and 8, respectively. Since the gap S between the liquid crystal display element 1 and the display boards 5 and 6 is hidden by the concealing portion 17a of the return member 17, the display device looks good. However, in the above display device, since the liquid crystal display element 1 and the display boards 5 and 6 are arranged side by side, the variable display unit 3 and the fixed display units 7 and 8 lack a sense of unity, which is not preferable in terms of appearance. Had the problem. In particular, since the variable display unit 3 and the fixed display units 7 and 8 are separated by the concealing unit 17a of the back member 17, there is a possibility that the sense of unity between the variable display unit 3 and the fixed display units 7 and 8 is further impaired. there were. The present invention has been made in view of the above problems, and provides a display device having a sense of unity between a variable display unit and a fixed display unit.

【0004】

[Means for solving problems]

The invention according to claim 1 is the liquid crystal display element 21 having a liquid crystal cell 22 in which a liquid crystal LC is enclosed between a pair of translucent substrates 25 and 26, and the liquid crystal display element 21 having display units 36 and 37. A display device having display boards 34, 35 arranged at the rear, wherein the liquid crystal cell 22 is provided between the pair of translucent substrates 25, 26 and sees through the display units 36, 37. The liquid crystal display element 21 is provided with the unit 32, and the display boards 34 and 35 are arranged behind the liquid crystal display element 21 so that the display units 36 and 37 of the display boards 34 and 35 can be seen through. The sense of unity between the variable display units 27 and 28 and the display units 36 and 37 of the display boards 34 and 35 is improved.

【0005】

The invention according to claim 2 includes a display board 34, 35 having display units 36, 37, a liquid crystal cell 22 in which a liquid crystal LC is enclosed between a pair of translucent substrates 25, 26, and the liquid crystal cell 22. A liquid crystal display having a front polarizing plate member 23 provided on the front side of the liquid crystal cell 22 and a rear polarizing member 24 provided on the rear side of the liquid crystal cell 22, and arranged in front of the display plates 34 and 35. In a display device including the element 21, the polarization direction of the front polarizing member 23 and the polarization direction of the rear polarizing member 24 are substantially the same, and the liquid crystal cells 22 are the display units 36 and 37. It is provided between the pair of translucent substrates 25 and 26 at the corresponding locations and has a translucent portion 32 for seeing through the display units 36 and 37, and the display plates 34 and 35 are arranged behind the liquid crystal display element 21. However, by configuring the display units 36,37 of the display boards 34,35 to be transparent, the variable display units 27,28 of the liquid crystal display element 21 and the display units 36,37 of the display plates 34,35 have a sense of unity. Is improved.

【0006】

Further, in the invention according to claim 3, the fluoroscopic portion 32 is made of the same material as the sealing portion 31 that seals the liquid crystal LC between the pair of translucent substrates 25 and 26.

【0007】

Further, in the invention according to claim 4, the see-through portion 32 is made of a translucent resin.

【0008】

Further, the invention according to claim 5 is a display plate 34, 35 having display units 36, 37, a liquid crystal cell 52 in which a liquid crystal LC is sealed between a pair of translucent substrates, and a front side of the liquid crystal cell 52. A liquid crystal display element 51 having a front polarizing plate member 53 provided and a rear polarizing member 54 provided on the rear side of the liquid crystal cell 52, and arranged in front of the display plates 34 and 35. , The polarization direction of the front polarizing member 53 and the polarization direction of the rear polarizing member 54 are substantially the same, and the liquid crystal display element 51 is the front polarizing member 53 and the rear side. It has a polarizing member removing section 57 provided at a position corresponding to at least one of the display sections 36 and 37 of the polarizing member 54, and the display boards 34 and 35 are arranged behind the liquid crystal display element 51 and displayed. By configuring the display units 36 and 37 of 34 and 35 to be transparent, the sense of unity between the variable display units 27 and 28 of the liquid crystal display element 51 and the display units 36 and 37 of the display boards 34 and 35 is improved.

【0009】

Further, in the invention according to claim 6, the liquid crystal display elements 21 and 51 have a light-shielding layer 33 at a position other than at least the display units 36 and 37, and the contrast ratio of the variable display units 27 and 28. Will be higher.

【0010】

Further, the invention according to claim 7 has light sources 44, 45 which are arranged behind the display boards 34, 35 and transmit and illuminate the display units 36, 37.

【0011】

The invention according to claim 8 has a light source 47 that is arranged behind the liquid crystal display elements 21 and 51 and transmits and illuminates the variable display units 27 and 28 of the liquid crystal display elements 21 and 51.

【0012】

The invention according to claim 9 is the first light source 44, 45 arranged behind the display boards 34, 35 and transmitting and illuminating the display units 36, 37, and the liquid crystal display elements 21, 51. A second light source 47, which is arranged rearward and transmits and illuminates the variable display units 27, 28 of the liquid crystal display elements 21, 51, and a first light source 44, which is provided around the first light sources 44, 45. It has a light-shielding wall 46 that blocks 45 lights.

【0013】

Further, in the invention according to claim 10, the variable display unit is a number display unit 27 composed of a plurality of segments 29 arranged in a Japanese character shape.

【0014】

Further, in the invention according to claim 11, the variable display unit is a bar graph display unit 28 composed of a plurality of segments 30 arranged in a row.

【0015】

Further, the invention according to claim 12 is obtained by connecting the first light sources 44 and 45 and the second light source 47 to the same circuit board 48.

【0016】

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, an embodiment in which the present invention is applied to a vehicle display device will be described with reference to the accompanying drawings. 1 and 2 are diagrams showing the first embodiment.

【0017】

Reference numeral 21 denotes a liquid crystal display element, which is formed by attaching a front polarizing plate 23 (front polarizing member) and a rear polarizing plate 24 (rear polarizing member) to the front surface and the rear surface of the liquid crystal cell 22, respectively. is there. The liquid crystal display element 21 is a negative display type, and the polarization directions of the front polarizing plate 23 and the rear polarizing plate 24 are the X-axis direction (horizontal direction on the paper surface). The liquid crystal cell 22 has a liquid crystal LC enclosed between two translucent substrates 25 and 26, and a transparent electrode made of ITO is formed on the inner surface of each translucent substrate 25 and 26 by a vapor deposition method. ing. The liquid crystal cell 22 is a TN type, but may be an STN type, for example.

【0018】

As shown in FIG. 2, the liquid crystal display element 21 has a number display unit 27 (variable display unit) and a bar graph display unit 28 (variable display unit). The numerical display unit 27 displays the speed of the vehicle numerically by the segments 29 arranged in a Japanese shape. The bar graph display unit 28 displays the engine speed by means of segments 30 arranged in a row. A sealing portion 31 is formed in the peripheral portion of the liquid crystal cell 22, and the liquid crystal LC is sealed between the pair of translucent substrates 25 and 26 by the sealing portion 31. Reference numeral 32 denotes a see-through portion, and the see-through portion 32 is made of a translucent resin provided at a position corresponding to a fixed display portion described later. The see-through portion 32 is made of the same material as the sealing portion 31, and is formed between the translucent substrate 25 and the translucent substrate 26. Reference numeral 33 denotes a light-shielding layer, and the light-shielding layer 33 is printed on the rear surface of the rear polarizing plate 24. The light-shielding layer 33 may not be provided, but the provision of the light-shielding layer 33 improves the contrast ratio of the number display unit 27 and the bar graph display unit 28.

【0019】

Reference numerals 34 and 35 are display boards, and the display boards 34 and 35 each have arrow-shaped fixed display units 36 and 37 (display units). The display boards 34 and 35 are arranged behind the liquid crystal display element 21. Display boards 34 and 35 are substrates 38 and 39 made of translucent resin (for example, polycarbonate) printed with translucent colored layers 40 and 41 and light-shielding layers 42 and 43, and fixed display units 36 and 37 are transparent. It is composed of light colored layers 40 and 41. Reference numerals 44 and 45 are bulbs (first light sources), and the bulbs 44 and 45 are arranged behind the display plates 34 and 35, respectively. Bulbs 44 and 45 transmit and illuminate displays 36 and 37. Reference numeral 46 denotes a light-shielding wall, which is provided around the bulbs 44 and 45 to prevent the light of the bulbs 44 and 45 from leaking to the number display unit 27 and the bar graph display unit 28.

【0020】

Reference numeral 47 denotes a bulb (second light source), which is arranged behind the liquid crystal display element 21. The bulb 47 transmits and illuminates the number display unit 27 and the bar graph display unit 28. Reference numeral 48 is a circuit board, and valves 44, 45, 47 are connected to the circuit board 48. The first and second light sources may be a light emitting diode, a cold cathode tube, a hot cathode tube, electroluminescence, or the like.

【0021】

Next, the action of the fluoroscopic unit 32 will be described in detail. The light emitted from the bulbs 44 and 45 and passing through the translucent colored layers 40 and 41 (fixed display units 36 and 37) passes through the rear polarizing plate 24 and becomes polarized light in the X-axis direction. The polarized light passes through the translucent substrate 26, the transparent portion 32, the translucent substrate 25, and the front polarizing plate 23 in this order, and is visually recognized by the observer. To help understanding, if the case where the transmissive portion 32 is absent is explained, the light that has passed through the translucent colored layers 40 and 41 passes through the rear polarizing plate 24 and becomes polarized light in the X-axis direction. Since it is rotated by 90 degrees and becomes polarized light in the Y-axis direction, it cannot pass through the front polarizing plate 23. That is, the fixed display units 36 and 37 cannot be visually recognized without the transparent unit 32.

【0022】

3 and 4 are diagrams showing the second embodiment. In the second embodiment, only the liquid crystal display element 51 is different from the first embodiment, and the other configurations are the same as those in the first embodiment. The same parts as those in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

【0023】

Reference numeral 51 denotes a liquid crystal display element, and the liquid crystal display element 51 has a front polarizing plate 53 (front polarizing member) and a rear polarizing plate 54 (rear polarizing member) attached to the front and rear surfaces of the liquid crystal cell 52, respectively. .. The liquid crystal cell 52 is a liquid crystal LC enclosed between two translucent substrates 55 and 56. The liquid crystal display element 51 is a negative display type, and the polarization directions of the front polarizing plate 53 and the rear polarizing plate 54 are in the X-axis direction. The rear polarizing plate 54 is provided with a polarizing plate removing portion 57 (polarizing member removing portion) at a position corresponding to the fixed display portions 35 and 37.

【0024】

The light emitted from the bulbs 44 and 45 and passing through the translucent colored layers 40 and 41 (fixed display units 36 and 37) passes through the translucent substrate 56, the translucent substrate 55, and the front polarizing plate 23 in that order. It is visually recognized by the observer . To help understanding, if the case where the polarizing plate removing portion 57 is not provided is explained, the light that has passed through the translucent colored layers 40 and 41 passes through the rear polarizing plate 54 and becomes polarized light in the X-axis direction, and is polarized in the X-axis direction by the liquid crystal LC. Since it is rotated by 90 degrees and becomes polarized light in the Y-axis direction, it cannot pass through the front polarizing plate 23. That is, the fixed display units 36 and 37 cannot be visually recognized without the polarizing plate removing unit 57.

【0025】

In the second embodiment described above, the rear polarizing plate 54 is provided with the polarizing plate removing portion 57, but the front polarizing plate 53 may be provided with the polarizing plate removing portion 57, and the front polarizing plate 53 and the front polarizing plate 53 and A polarizing plate removing portion 57 may be provided on the rear polarizing plate 54. In order to prevent the drawings from becoming complicated, the liquid crystal display elements 21, 51 and the display boards 34, 35 in FIGS. 1 and 3 are shown enlarged in the thickness direction (vertical direction of the paper surface).

【0026】

According to the first and second embodiments described above, the display boards 34 and 35 are arranged behind the liquid crystal display element 21 so that the fixed display units 36 and 37 of the display boards 34 and 35 can be seen through. The sense of unity between the variable display unit (number display unit 27, bar graph display unit 28) and the fixed display units 36 and 37 is improved. Further, since the back member 17 described in the conventional example is not required, the display device can be provided at low cost by reducing the number of parts.

[Simple explanation of drawings]

[Figure 1]

The cross-sectional view which shows the 1st Embodiment of this invention.

[Figure 2]

The front view which shows the 1st Embodiment of the same above.

[Fig. 3]

The cross-sectional view which shows the 2nd Embodiment of this invention.

[Fig. 4]

The front view which shows the 2nd Embodiment of the same above.

[Fig. 5]

Sectional drawing which shows the conventional example.

[Fig. 6]

Same as above Front view showing a conventional example.

[Explanation of symbols]

21 Liquid crystal display element 22 LCD cell 23 Front polarizing plate (front polarizing member) 24 Rear polarizing plate (rear polarizing member) 27 Number display (variable display) 28 Bar graph display (variable display) 29 segments 30 segments 31 Seal 32 fluoroscopy 33 Shading layer 34,35 display board 36,37 Fixed display (display) 44,45 bulb (first light source) 46 shading wall 47 bulb (second light source) 51 Liquid crystal display element 52 LCD cell 53 Front polarizing plate (front polarizing member) 54 Rear polarizing plate (rear polarizing member) 57 Polarizing member remover